Iad to lisbon

Wed, 26 Mar LIS - IAD with TAP Air Portugal. Direct. from $755. Lisbon.$962 per passenger.Departing Wed, 27 Nov, returning Mon, 2 Dec.Return flight with TAP Air Portugal.Outbound direct flight with TAP Air Portugal departs from Washington Dulles on Wed, 27 Nov, arriving in Lisbon.Inbound direct flight with TAP Air Portugal departs from …

Washington. LIS. Lisbon. $710. Roundtrip. found 1 hour ago. $285 Search for cheap flights deals from IAD to LIS (Washington Dulles Intl. to Humberto Delgado). We offer cheap direct, non-stop flights including one way and roundtrip tickets. Find United's best fares from Washington, D.C. (IAD) to Portugal ... Select Cabin Class. Select travel class. keyboard_arrow_down. keyboard_arrow_left. Washington, D.C. (IAD) …Find cheap flights to Lisbon from $215. Round-trip. 1 adult. Economy. 0 bags. Add hotel. Tue 5/21. Tue 5/28. Search. We will apply the Nonstop flights filter based on your original …Flight Review: TAP Air Portugal A330 Washington-Lisbon (IAD-LIS) TP232 IAD-LIS A330-2 14JUL19. Aircraft: CS-TOP. We were able to board in the first boarding group, of course. The boarding at IAD was divided into three groups: Preboarding, Premium Passengers, Group 1 and Group 2. The “Prebaording” group had your usual suspects: Families with ... There are 2 airlines that fly nonstop from Lisbon to Washington, D.C. Dulles Intl Airport. They are TAP AIR PORTUGAL and United Airlines. The cheapest airline for this route is TAP AIR PORTUGAL, with the best one-way deal found costing $526. On average, the best prices for this route can be found at TAP AIR PORTUGAL.

Find United's best fares from Washington, D.C. (IAD) to Portugal ... Washington, D.C. (IAD) to. Lisbon (LIS) 10/08/24 - 10/14/24. from. $ 875* Viewed: 1 hour ago ... Sep 18, 2019 ... TAP Portugal Business Class Review Bottom Line – 2/3 ... Despite several misses, this was a solid trip for a transatlantic overnight flight. I was ...Washington, D.C. (IAD) to. Lisbon (LIS) Jul 23 2024 - Aug 18 2024. From. $810.09* Seen: 1 day ago. Roundtrip* / Economy. Book now. Washington, D.C. (IAD) to. Lisbon (LIS) Jul 4 2024 - Jul 14 2024. From. $1,643.74* ... Lisbon Historic Sites: Step back in time to the Age of Discovery at the Monastery of the Hieronymites and the Tower of Belém ...Return flights from Washington IAD to Lisbon LIS with American Airlines If you’re planning a round trip, booking return flights with American Airlines is usually the most cost-effective option. With airfares ranging from $667 to $667, it’s easy to find a flight that suits your budget.May 9, 2024 · IAD -> LIS Washington 14min late Washington (IAD / KIAD) 06 May 22:25 EDT: Lisbon 8min early Lisbon (LIS / LPPT) 07 May 10:40 WEST: 06 May 22:39 14min late 07 May 10:31 8min early 05. May Landed TP234 IAD -> LIS Washington 11min late Washington (IAD / KIAD) 05 May 22:20 EDT: Lisbon All flights from IAD to LIS non-stop. There are direct flights from Washington Dulles International, Virginia, USA to Lisbon Airport (LIS), Portugal every day of the week with TAP Portugal and United Airlines. The flight distance is 3602 miles and the trip usually takes about 7 hours and 5 minutes. IAD. From Washington, D.C. (IAD) To Lisbon (LIS) Round-trip | Economy: 24/10/2024 - 31/10/2024: From. ... The larger and busier Washington Dulles Airport is situated 42 km ...

QuintoAndar is taking its first steps out of Brazil to open a technology hub in Lisbon, Portugal aimed at attracting technology talent across the pond. Co-founder and CEO Gabriel B...Amazing TAP Portugal IAD to LIS Flight Deals. The cheapest flights to Humberto Delgado found within the past 7 days were $499 round trip and $590 one way. Prices and availability subject to change. Additional terms may apply. Fri, Nov 15 - Fri, Nov 22.Cheap Flights from Martinsburg to Lisbon (IAD-LIS) Prices were available within the past 7 days and start at $284 for one-way flights and $361 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. Looking for flights deals to Lisbon ? Find cheap one-way or return flights from ...Lisbon, the vibrant capital of Portugal, is a city that offers a unique blend of history, culture, and stunning architecture. As one of Europe’s most popular travel destinations, i...When planning a trip to Lisbon, Portugal, one of the most important decisions you’ll need to make is choosing a car rental company. With so many options available, it can be overwh...

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Cheap Flights from Lisbon to Washington (LIS-IAD) Prices were available within the past 7 days and start at $372 for one-way flights and $404 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. Book one-way or return flights from Lisbon to Washington with no change fee on selected ...BusinessClass.com review by Varun Sharma. Updated 13. Feb 2024. When flying TAP Air Portugal, one can expect Portuguese touches and a unique and growing network connecting Europe with Africa and the Americas. The airline's Business Class, branded as Executive Class, offers fully flatbed seats, delicious dining and an impressive …Cheapest flights to Portugal from Washington Dulles. Washington Dulles to Lisbon from $362. Price found Apr 2, 2024, 4:45 AM. Washington Dulles to Porto from $575. Price found Apr 1, 2024, 8:16 PM. Washington Dulles to Ponta Delgada from $581.“TAP Air Portugal’s new nonstop service to Lisbon from Washington Dulles International is a valuable addition to the diverse and growing air carrier lineup in the Washington, D.C., region,” said Yil Surehan, vice president of Airline Business Development for Metropolitan Washington Airports Authority.António Guterres is the Secretary-General of the United Nations. He came into office Jan. 1, 2017 and is the ninth Secretary-General. Guterres was born on April 30, 1949 and raised...IAD -> LIS Washington 14min late Washington (IAD / KIAD) 06 May 22:25 EDT: Lisbon 8min early Lisbon (LIS / LPPT) 07 May 10:40 WEST: 06 May 22:39 14min late 07 May 10:31 8min early 05. May Landed TP234 IAD -> LIS Washington 11min late Washington (IAD / KIAD) 05 May 22:20 EDT: Lisbon

It's a 7-hour flight on a small six-seat-a-row airbus, but still tiring at least for us...Cheap Washington, D.C. Dulles Intl Airport to Lisbon (IAD to LIS) flight deals and tips. Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Lisbon. Best Price Found: $423: Fastest flight …Jun 5, 2022 ... My flight path was from DEN -> IAD (Washington Dulles) -> LIS. Both flights were uneventful, though slightly turbulent at times. The service ...The international TAP Air Portugal flight TP234 / TAP234 departs from Washington Dulles [IAD], United States and flies to Lisbon [LIS], Portugal. The estimated flight duration is 12:15 hours and the distance is 5766 kilometers. Departure is today 4/28/2024 at 22:20 EDT at Washington Dulles from Terminal -- Gate --.Find out how iad has become the French leader in property transactions in just 15 years. Over than 9 000 real estate ads online. Moving house is always a story with a happy ending. Estimate your property’s value in just 2 minutes. Know more . Sell a property with an iad agent* Know more . Find your real estate agent*Additionally, Washington Dulles International Airport Washington and Humberto Delgado Airport Lisbon are the nearest and major airports for your travel and if you are looking forward to saving money on your flight ticket, then a round trip is what you should go for. Why Make Washington to Lisbon Air Canada Booking with EaseMyTripAs of February 15, 2024, United will launch its seasonal Washington (IAD) to Lisbon (LIS) route As of February 15, 2024, United will launch its seasonal Washington (IAD) to Rome (FCO) route As of March 30, 2024, United will launch its seasonal Newark (EWR) to Nice (NCE) routeWashington Dulles International Airport security checkpoints. Image Credit: Washington Dulles International Airport. IAD has 3 security checkpoints in the terminal — east, west, and a TSA PreCheck checkpoint. The checkpoints operate during these hours: East Checkpoint: 3:45 a.m. to 10:30 p.m. West Checkpoint: 4:45 a.m. to 9 …New Nonstop Flights to Barbados on United Airlines. Oct 28, 2021 - 10:28PM EDT. Washington Dulles International Airport (IAD) welcomes new nonstop service between to Barbados (BGI) and Dulles International (IAD) on United Airlines. The airline will operate Boeing 737-800’s, every Sunday, beginning on December 5th through the end of 2021.Dec 29, 2022 ... Washington – Lisbon Flight TP 232 IAD 17:50 – LIS 06:05+1 Tuesday, Wednesday, Thursday, Saturday and Sunday. Washington – Lisbon Flight TP 234 ...Find United's best fares from Washington, D.C. (IAD) to Portugal ... Select Cabin Class. Select travel class. keyboard_arrow_down. keyboard_arrow_left. Washington, D.C. (IAD) to. Lisbon (LIS) 01/29/25 - 02/26/25. from. $ 889* Viewed: 1 day ago. Roundtrip | Economy. Book Now. Washington, D.C. (IAD) to. Porto (OPO) 07/30/24 - 08/13/24. from ...Tue, 22 Oct IAD - LIS with TAP Air Portugal. Direct. from £460. Washington D.C.. £464 per passenger.Departing Mon, 13 May, returning Mon, 27 May.Return flight with Iberia and Finnair.Outbound indirect flight with Iberia, departs from Lisbon on Mon, 13 May, arriving in Washington Dulles.Inbound indirect flight with Finnair, departs from ...

To Dallas. To Miami. To Cleveland. To Cancun. To Raleigh. To Kansas City. To Las Vegas. Find United Airlines best fares from Lisbon to the United States. Book a Lisbon to the United States flight and enjoy our premium cabins with speedy Wi-Fi.

Capital One is opening 3 new locations of its own airport lounge at Denver, Las Vegas, and D.C. We cover everything we know so far! We may be compensated when you click on product ... Find United's best fares from Washington, D.C. (IAD) to Portugal ... Washington, D.C. (IAD) to. Lisbon (LIS) 10/08/24 - 10/14/24. from. $ 875* Viewed: 1 hour ago ... We flew with them from IAD (Washington DC) to Barcelona (via Lisbon) and returned from Lisbon to IAD. We were looking for price and direct flights, and found them to be competitive price-wise and the direct return was good. We paid extra for ONE checked bag each way ($85x2) and better seats each way ($79x2 & $74x2) - mainly for the seat …1 stop. Sun, Jan 26 IAD – LIS with Fly Play. 1 stop. from $335. Washington, D.C..$391 per passenger.Departing Mon, Jan 13, returning Thu, Feb 13.Round-trip flight with Fly Play.Outbound indirect flight with Fly Play, departing from Lisbon on Mon, Jan 13, arriving in Washington Dulles.Inbound indirect flight with Fly Play, departing from ...Lisbon. AED 1,606 per passenger. Departing Sun, Nov 24, returning Mon, Dec 2. Round-trip flight with Fly Play. Outbound indirect flight with Fly Play, departing from Washington Dulles on Sun, Nov 24, arriving in Lisbon.Lisbon to Washington Flights. Flights from LIS to IAD are operated 14 times a week, with an average of 2 flights per day. Departure times vary between 09:15 - 17:40. The earliest flight departs at 09:15, the last flight departs at 17:40. However, this depends on the date you are flying so please check with the full flight schedule above to see ...1 stop. Sun, Jan 26 IAD – LIS with Fly Play. 1 stop. from $335. Washington, D.C..$391 per passenger.Departing Mon, Jan 13, returning Thu, Feb 13.Round-trip flight with Fly Play.Outbound indirect flight with Fly Play, departing from Lisbon on Mon, Jan 13, arriving in Washington Dulles.Inbound indirect flight with Fly Play, departing from ...Find cheap flights from Washington Dulles Airport to Spain from. $312. Round-trip. 1 adult. Economy. 0 bags. Add hotel. Wed 6/5. Wed 6/12.When the first Harry Potter movie came out in 2001 the idea of the Daily Prophet, a newspaper that contains moving pictures, qualified as magic. A Kickstarter campaign by Ynvisible...

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Cheap Flights from Lisbon to Washington (LIS-IAD) Prices were available within the past 7 days and start at $372 for one-way flights and $404 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. Book one-way or return flights from Lisbon to Washington with no change fee on selected ...What time of day is best to fly from Washington, D.C. Dulles Intl Airport IAD to Lisbon LIS? While booking a flight from Washington, D.C. Dulles Intl Airport to Lisbon in the afternoon is often the most expensive, you can instead save up to 24% on flights from Washington, D.C. Dulles Intl Airport to Lisbon by searching for tickets in the morning.Departure Time. Arrival Time. TAP Air Portugal. JetBlue / Operated by TAP Air Portugal 231. (LIS to IAD) Track the current status of flights departing from (LIS) Humberto Delgado Airport and arriving in (IAD) Washington Dulles International Airport.IAD to LIS. All flight routes from Washington Dulles International , Virginia, USA to Lisbon Airport , Portugal. These routes are operated by 20 different airlines.Experience Lisbon’s fascinating cultural history, from traditional fado tavernas serving Portuguese food to spectacular Moorish castles like the 11th-century Castelo de Sao Jorge, with incredible city views from atop the castle’s Fortress. The modern vibrancy of the city comes to life with the welcoming hospitality of its people and a ...IAD -> LIS Washington 14min late Washington (IAD / KIAD) 06 May 22:25 EDT: Lisbon 8min early Lisbon (LIS / LPPT) 07 May 10:40 WEST: 06 May 22:39 14min late 07 May 10:31 8min early 05. May Landed TP234 IAD -> LIS Washington 11min late Washington (IAD / KIAD) 05 May 22:20 EDT: LisbonJan 15, 2019 · Lisbon to Washington-Dulles Starting June 16, 2019, TAP Air Portugal will serve the Lisbon – Washington-Dulles route five days a week (Sundays, Mondays, Wednesdays, Thursdays, and Fridays). TP0231 will depart from Lisbon at 4:30 pm and arrive in Washington at 7:40 pm, while TP0232 will depart from Washington at 10:40 pm and arrive in Lisbon ... TAP Air Portugal TP232 / TAP232 Flight details & Flight status. The international TAP Air Portugal flight TP232 / TAP232 departs from Washington Dulles [IAD], United States and flies to Lisbon [LIS], Portugal.. The estimated flight duration is 12:15 hours and the distance is 5766 kilometers.. Departure is today 5/10/2024 at 19:55 …Delta flight deals and tickets from Lisbon to Washington (LIS to IAD) from $1,033 ….

The Boeing 767-400 is the aircraft model that flies most regularly on the Washington, D.C. to Lisbon flight route. Which airline alliances offer flights from Washington, D.C. to Lisbon? Star Alliance is the only airline alliance operating flights between Washington, D.C. and Lisbon. On which days can I fly direct from Washington, D.C. to Lisbon?How far is Washington, D.C. Dulles Intl to Lisbon Humberto Delgado by plane? The straight-line distance from Washington, D.C. Dulles Intl to Lisbon Humberto Delgado is 3581.5 mi. Typically, this will take 7h 10m by plane in normal conditions.Here’s a guide to help you decide which Priority Pass lounge to spend your time at before flying out of Washington Dulles. Update: Some offers mentioned below are no longer availab...TAP Air Portugal 234. TAP234. / TP234. Expected to depart in 7 hours 56 minutes. IAD Washington, DC. LIS Lisbon, Portugal. takes off from Washington Dulles Intl - IAD. arriving at Terminal 1 General Humberto Delgado Airport - LIS. Sunday 07-Apr-2024 10:20PM EDT.The cheapest return flight ticket from Washington Dulles Airport to Lisbon found by KAYAK users in the last 72 hours was for $359 on PLAY, followed by TAP AIR PORTUGAL ($478). One-way flight deals have also been found from as low as $332 on PLAY and from $361 on Royal Air Maroc.Prices were available within the past 7 days and start at $643 for one-way flights and $691 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals. One way. Roundtrip. Tue, Nov 12 - Tue, Nov 19. IAD. Washington.Jun 24, 2022 ... The cheapest way would be to fly from Dulles, Newark, or JFK to Lisbon, and then taking a bus or train from Lisbon to Faro. Upvote 3Book cheap flights from Lisbon to Washington, D.C.. Enjoy award winning service and inflight entertainment with Tap Air Portugal. ... Washington, D.C. (IAD) 18/05 ... Iad to lisbon, Flights from Washington, D.C. to Lisbon. Use Google Flights to plan your next trip and find cheap one way or round trip flights from Washington, D.C. to Lisbon. Find the best …, Nonstop flights to and from Lisbon, every day! Portuguese culture is an incredible combination of ethnic influences from all over the world that date back to the 15th century. You can see it in the architecture and feel it in the atmosphere around you. You will be fascinated by the diversity and energy of Lisbon! Strolling through Lisbon, you will see …, International Advanced Dentistry is a project in the field of dentistry located in the center of Lisbon. We are focused on bringing a holistic approach to dental medicine, combining years of experience in treating complex cases with the scientific and technical knowledge of our multidisciplinary clinical team. We believe that it is the time and ..., Return flights from Washington IAD to Lisbon LIS with British Airways If you’re planning a round trip, booking return flights with British Airways is usually the most cost-effective option. With airfares ranging from $707 to $707, it’s easy to find a flight that suits your budget., The Boeing 767-400 is the aircraft model that flies most regularly on the Washington, D.C. to Lisbon flight route. Which airline alliances offer flights from Washington, D.C. to Lisbon? Star Alliance is the only airline alliance operating flights between Washington, D.C. and Lisbon. On which days can I fly direct from Washington, D.C. to Lisbon?, Direct (non-stop) flights from Dulles to Lisbon. All flight schedules from Washington Dulles International , Virginia , USA to Lisbon Airport, Portugal . This route is operated by 2 …, Washington. LIS. Lisbon. $741. Roundtrip. found 2 days ago. LIS From IAD Economy Coach Packages on Similar Airlines. Remove all filters. Eurostars Universal …, Subway to Washington Dulles, fly • 10h 24m. Take the subway from Farragut West, Blue/Orange/Silver Line Track 2 Platform to Washington Dulles International Airport, Silver Line Center Platform. Fly from Washington Dulles (IAD) to Lisboa (LIS) IAD - LIS., Transportation plays a crucial role in ensuring a seamless travel experience, and this is especially true when it comes to getting from Lisbon to Evora. If you prefer a comfortable..., Mar 10, 2024 · Return flights from Washington IAD to Lisbon LIS with American Airlines If you’re planning a round trip, booking return flights with American Airlines is usually the most cost-effective option. With airfares ranging from $667 to $667, it’s easy to find a flight that suits your budget. , Discover Portugal with flights to Lisbon and Porto. Visit Lisbon. ... Washington, D.C. (IAD) to. Lisbon (LIS) 06/30/24 - 07/04/24. Roundtrip | Business. from. $ 4,111*, The cheapest flights to Humberto Delgado found within the past 7 days were $695 round trip and $643 one way. Prices and availability subject to change. Additional terms may apply. Tue, Nov 19 - Thu, Dec 5. IAD. Washington. LIS. Lisbon. $695., Mar 6, 2020 ... Review, photos and rating of TAP Air Portugal TP231 Lisbon (LIS) → Washington (IAD) by JonathanL . Flight in Economy Airbus A330-200., Find flights to Lisbon LIS from $215. Fly from the United States on TAP AIR PORTUGAL, United Airlines & more. New York from $215; Boston from $249; Newark from $267 | KAYAK ... Washington Dulles Airport to Lisbon (IAD - LIS) $617. Newark Liberty Airport to Lisbon (EWR - LIS) $552. Boston to Lisbon (BOS - LIS) $594. New York John F …, QuintoAndar is taking its first steps out of Brazil to open a technology hub in Lisbon, Portugal aimed at attracting technology talent across the pond. Co-founder and CEO Gabriel B..., TP234 Washington Dulles Intl Lisboa TP234. Flight TP234 from Washington to Lisbon is operated by TAP-Air Portugal. Scheduled time of departure from Washington Dulles Intl is 22:25 EDT and scheduled time of arrival in Lisboa is 10:40 WEST. The duration of the flight TAP-Air Portugal TP 234 is 7 hours 15 minutes., As of September 2014, the fastest ever recorded speed of a kicked soccer ball was 131 miles per hour. The speed came from a free kick made by Ronnie Heberson of Lisbon’s Club Sport..., UA942 Washington Dulles Intl Lisboa UA942. Flight UA942 from Washington to Lisbon is operated by United Airlines. Scheduled time of departure from Washington Dulles Intl is 22:15 EDT and scheduled time of arrival in Lisboa is 10:30 WEST. The duration of the flight United Airlines UA 942 is 7 hours 15 minutes., From Washington, D.C. (IAD) To Lisbon (LIS) Round-trip | Economy: 24/10/2024 - 31/10/2024: From. ... The larger and busier Washington Dulles Airport is situated 42 km ... , Dec 29, 2022 ... Washington – Lisbon Flight TP 232 IAD 17:50 – LIS 06:05+1 Tuesday, Wednesday, Thursday, Saturday and Sunday. Washington – Lisbon Flight TP 234 ..., May 9, 2024 · IAD -> LIS Washington 14min late Washington (IAD / KIAD) 06 May 22:25 EDT: Lisbon 8min early Lisbon (LIS / LPPT) 07 May 10:40 WEST: 06 May 22:39 14min late 07 May 10:31 8min early 05. May Landed TP234 IAD -> LIS Washington 11min late Washington (IAD / KIAD) 05 May 22:20 EDT: Lisbon , Popular distances from Lisbon (LIS) Distance from Lisbon to Washington D.C. (Lisbon Airport – Washington Dulles International Airport) is 3591 miles / 5780 kilometers / 3121 nautical miles. See also a map, estimated flight duration, carbon dioxide emissions and the time difference between Lisbon and Washington D.C.., The cheapest flights to Humberto Delgado found within the past 7 days were $695 round trip and $643 one way. Prices and availability subject to change. Additional terms may apply. Tue, Nov 19 - Thu, Dec 5. IAD. Washington. LIS. Lisbon. $695., Apr 8, 2024 · TAP Air Portugal 234. TAP234. / TP234. Expected to depart in 7 hours 56 minutes. IAD Washington, DC. LIS Lisbon, Portugal. takes off from Washington Dulles Intl - IAD. arriving at Terminal 1 General Humberto Delgado Airport - LIS. Sunday 07-Apr-2024 10:20PM EDT. , Looking for cheap flights to Lisbon? Book now to earn airline miles in addition to our OneKeyCash rewards and receive alerts if flight prices change. Find great 2024 Lisbon flight deals now! ... Oct 20 from Washington Dulles Intl. to Humberto Delgado, returning Mon, Nov 11, priced at $352 just found. Fri, Mar 7 - Fri, Mar 14. JFK. John F ..., The cheapest flights to Humberto Delgado found within the past 7 days were $695 round trip and $643 one way. Prices and availability subject to change. Additional terms may apply. Tue, Nov 19 - Thu, Dec 5. IAD. Washington. LIS. Lisbon. $695. , International Advanced Dentistry is a project in the field of dentistry located in the center of Lisbon. We are focused on bringing a holistic approach to dental medicine, combining years of experience in treating complex cases with the scientific and technical knowledge of our multidisciplinary clinical team. We believe that it is the time and ..., IAD -> LIS Washington 14min late Washington (IAD / KIAD) 06 May 22:25 EDT: Lisbon 8min early Lisbon (LIS / LPPT) 07 May 10:40 WEST: 06 May 22:39 14min late 07 May 10:31 8min early 05. May Landed TP234 IAD -> LIS Washington 11min late Washington (IAD / KIAD) 05 May 22:20 EDT: Lisbon, The Boeing 767-400 is the aircraft model that flies most regularly on the Washington, D.C. to Lisbon flight route. Which airline alliances offer flights from Washington, D.C. to Lisbon? Star Alliance is the only airline alliance operating flights between Washington, D.C. and Lisbon. On which days can I fly direct from Washington, D.C. to Lisbon?, , More than 7 days of TP232 history is available with an upgrade to a Silver (90 days), Gold (1 year), or Business (3 years) subscription. 7-day FREE trial | Learn more. TP232 (TAP Air Portugal) - Live flight status, scheduled flights, flight arrival and departure times, flight tracks and playback, flight route and airport., Discover the best places to visit in Spring including Lisbon, Portugal, Nagano, Japan and Rincon, Puerto Rico. By clicking "TRY IT", I agree to receive newsletters and promotions f..., Lisbon is the most popular layover city among KAYAK users traveling from Washington Dulles Airport to Porto. Which is the best airline for flights from Washington, D.C. to Porto, Delta or KLM? The two airlines most popular with KAYAK users for flights from Washington, D.C. to Porto are Delta and KLM.