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OPO - IAD

Find cheap flights from Porto to Washington Dulles Airport from $339

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Porto to Dulles Intl departing on 8/24. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Fri 6/7
Fri 6/14

Search hundreds of travel sites at once for deals on flights to Washington Dulles Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Porto to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Porto to Washington, D.C., as well as popular online travel agencies
In the last 7 days travelers have searched 43,968,530 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from Porto to Dulles Intl (OPO-IAD)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Porto to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
8:30 pm - 3:35 pmOPO-IAD
24h 05m1 stop
6:25 pm - 3:30 pmIAD-OPO
16h 05m1 stop
Sun, Jun 16 - Mon, Aug 5
8:30 pm - 3:35 pmOPO-IAD
24h 05m1 stop
7:50 pm - 3:40 pmIAD-OPO
14h 50m2 stops
$659KLM
Find Deal
Sun, Jun 16 - Mon, Aug 5
12:25 pm - 7:15 pmOPO-IAD
11h 50m1 stop
8:15 pm - 7:55 pmIAD-OPO
42h 40m2 stops
$681American Airlines
Find Deal
Fri, Jun 7 - Fri, Jun 14
7:20 pm - 4:15 pmOPO-IAD
25h 55m1 stop
5:45 pm - 7:55 amIAD-OPO
33h 10m1 stop
$711SWISS
Find Deal
Fri, Jun 7 - Fri, Jun 14
2:35 pm - 4:15 pmOPO-IAD
30h 40m2 stops
5:45 pm - 1:45 pmIAD-OPO
15h 00m2 stops
$767SWISS
Find Deal
Fri, Jun 7 - Fri, Jun 14
2:35 pm - 4:15 pmOPO-IAD
30h 40m2 stops
8:45 pm - 5:20 pmIAD-OPO
39h 35m2 stops
$784SWISS
Find Deal
Sun, Jun 16 - Mon, Aug 5
8:40 am - 4:15 pmOPO-IAD
12h 35m1 stop
5:45 pm - 7:55 amIAD-OPO
33h 10m2 stops
$828SWISS
Find Deal
Sun, Jun 16 - Mon, Aug 5
12:20 pm - 4:23 pmOPO-IAD
33h 03m2 stops
5:00 am - 7:35 amIAD-OPO
21h 35m3 stops
$2,054American Airlines
Find Deal
Sun, Jun 16 - Mon, Aug 5

Flights from Porto to Dulles Intl - Travel Insights & Trends

Get data-powered insights and trends into flights from Porto to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Porto to Washington Dulles Airport?

The average price of all flights from Porto to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.
For Porto to Washington Dulles Airport, Wednesday is the cheapest day to fly on average and Monday is the most expensive. Flying from Washington Dulles Airport back to Porto, the best deals are generally found on Sunday, with Wednesday being the most expensive.

Which airlines provide the cheapest flights from Porto to Washington Dulles Airport?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The cheapest return flight ticket from Porto to Washington Dulles Airport found by KAYAK users in the last 72 hours was for $659 on KLM, followed by American Airlines ($681). One-way flight deals have also been found from as low as $339 on PLAY and from $469 on TAP AIR PORTUGAL.

Good to know

High season

September

Cheapest flight

$339
Most popular time to fly and prices are also 21% lower on average.
Flight from Porto to Washington Dulles Airport

When to book flights from Porto to Dulles Intl

Are your dates flexible? Find out the best times to travel from Porto to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Porto to Washington Dulles Airport flights

  • What is the cheapest flight from Porto to Washington, D.C. Dulles Intl Airport?

    In the last 3 days, the lowest price for a flight from Porto to Washington, D.C. Dulles Intl Airport was $339 for a one-way ticket and $603 for a round-trip.

  • Do I need a passport to fly between Porto and Washington Dulles Airport?

    Yes

  • Which airports will I be using when flying from Porto to Washington Dulles Airport?

    On your way to Washington Dulles Airport, you’ll fly out from Porto. You’ll be landing at Washington, D.C. Dulles Intl.

  • Which aircraft models fly most regularly from Porto to Washington Dulles Airport?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Porto to Washington Dulles Airport?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Porto and Washington Dulles Airport, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Porto to Washington, D.C., KLM or TAP AIR PORTUGAL?

    The two airlines most popular with KAYAK users for flights from Porto to Washington, D.C. are KLM and TAP AIR PORTUGAL. With an average price for the route of $540 and an overall rating of 7.8, KLM is the most popular choice. TAP AIR PORTUGAL is also a great choice for the route, with an average price of $697 and an overall rating of 7.1.

  • How does KAYAK find such low prices on flights from Porto to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Porto to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Porto to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Porto is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Porto to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Porto with another airline. Booking your flights between Porto and IAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Porto to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Porto up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airlines flying from Porto to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from Porto to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Porto to Dulles Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1592 reviews
7.2Entertainment
7.3Food
8.4Crew
7.6Comfort
7.8Boarding
Airline reviews

The flight was delayed for 2 hrs. Because they didn’t have a crew to fly. And it is not a first time for klm to do that. Last time they cancelled my filght and rebooked me 3 days later. Not reliable airline

2.0 MediocreDavor, Mar 2024AMS - ZAG
Read more about KLM reviews

The flight was delayed for 2 hrs. Because they didn’t have a crew to fly. And it is not a first time for klm to do that. Last time they cancelled my filght and rebooked me 3 days later. Not reliable airline

We left one hour late because of technical difficulties. The economy comfort seats are great for the price. The crew was mediocre, they do not provide a pleasant experience, they just deliver food and drinks and give orders, not very amicable, no service and hospitality focus.

Seats are fair enough for medium tall people. Good food all the trip. Fight attendances are warm

I thought KLM was the best airline but the Lima - Amsterdam was 1 hours late, the Brussels - Amsterdam was 2.30 hours late and the Amsterdam - Lima was 30 minutes late

Overall a good experience. We were disappointed when we had to check our carry on due to the plane being full. KLM hadn’t notified us and we had valuable items in the carry on but they still made us check it. Some of the food was great and some was mediocre. Crew is really kind and funny.

The worst airline. Cancelled flight 30 min before boarding and rebooked on flight after 3 days.

The flight itself it was great nice food the crew were very nice and helpful, Checking in from Birmingham wasn't great long queues for bag dropped, And I had my hand luggage case taken away from me even though I requested to have it with me as I had breakables items. I was told I can not because of the length of the flight with no explanation at all no options was given for me to take my fragile items out of my case it was taken away with hold buggage I find the staff member who was checking me in very unpleasant !! Can we please be advise if the rules have changed about the the carry on hand luggage it will be easier to be advise on booking your tickect if we not allowed to take the hand luggage with me. Overall I had a good flight .

The plane was clean and the staff was friendly. Food and drinks as expected on international flights. The entertainment system was old style, with a pullout controller, and selections not as extensive as on other flights.

One of their staff was so rude with discriminative. Such a reputed airline shouldn't hire such kind of arrogant attendants.

one of my bags was drenched with fish smelling water and all my new clothes bought at dublin and the 23kg checked in bag were all gone waste with very pungent fish smell and also having stains

Adequate. You get what you pay for. Absolutely no frills but a cost effective way to travel between European countries.

Disastrous boarding. Entered air bridge only to descend stairs and enter a bus. Plane had insufficient storage, was old and chair recline was damaged. Air stewardess was sullen.

I wish to bring to your attention an incident involving a flight attendant that occurred on my recent journey. The attendant displayed a lack of courtesy, which was concerning. For instance, after accidentally spilling water on a passenger, the attendant dismissed the situation rather than offering a proper apology. Additionally, when I handed over my trash, the attendant reacted negatively because I placed a paper cup on the tray, she told me this doesn't go here and threw it back on my table. It was apparent that she was experiencing a challenging day, which unfortunately impacted the service provided to myself and other passengers. While I understand that everyone can have an off day, it is essential for customer-facing staff to seek support to manage personal stress without it affecting their professional responsibilities.

The flight crew was good, the flight itself was quick and comfortable

Boarding was late by 30 min due to a bus missing to take us to the plane... And then the flight was delayed by about 90 minutes, in a 60 min flight

Very agressive with bags both arrival and departures found minor damage to my luggage including my check bag being broken into nothing of value was in there so I do not believe anything was taken but definitely broken zipper into the outer pockets of suitcase

Everything was nearly perfect, and TAP staff were especially helpful when we missed our connecting flights and had to get on the next flight to Rome. The only aspect that could have been better was boarding: it was somewhat disorganized, which created a bit of stress. But in the end, everyone got on the plane, so the less-then-perfect boarding process did not take away from the overall excellent experience.

TAP Air makes you take a bus on arrival or departure, making it difficult for passengers to make connections.

Two of three flight attendants were not super kind as I would expect. The very kind young lady in my section was wonderful but then lady and man up front were not. Sorry but it makes a difference !

Great staff who were ready working with smile 6 in the morning on New Year’s Day. Although security checkpoint was way too busy, the airline staff were understanding and waited few minutes after boarding. We took off not only exactly on time, but arrived 20 minutes early. Two thumbs up!!!

Book cheap flights from Porto to Washington, D.C.

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Porto to Washington, D.C. found on KAYAK in the last 72 hours.
8/24Sat
1 stopPLAY
25h 45mOPO-IAD
$339
5/19Sun
1 stopPLAY
25h 30mOPO-IAD
$342
6/19Wed
2 stops
29h 30mOPO-IAD
$387
5/30Thu
1 stopPLAY
25h 30mOPO-IAD
$413
5/19Sun
2 stops
40h 40mOPO-IAD
$428
9/24Tue
1 stopTAP AIR PORTUGAL
13h 20mOPO-IAD
$469
10/21Mon
2 stopsIberia
24h 00mOPO-IAD
$498
10/21Mon
1 stopIberia
27h 40mOPO-IAD
$510
7/25Thu
1 stopTAP AIR PORTUGAL
18h 20mOPO-IAD
$660
7/12Fri
2 stopsKLM
15h 25mOPO-IAD
$969

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Porto - Washington Dulles Airport Flights

Departure:

Porto (undefined)Portugal

Destination:

Washington Dulles Airport (IAD)United States

Return flight deals:

Washington Dulles Airport - Porto

Cabin classes: