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OPO - IAD

$386 Find cheap flights from Porto to Washington Dulles Airport

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 6/15. 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
mié. 7/10
mié. 7/17

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 42,898,604 times on KAYAK, and here is why:

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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
12:00 pm - 8:20 pmOPO-IAD
13h 20m1 stop
11:30 pm - 10:00 pmIAD-OPO
18h 30m1 stop
$521TAP AIR PORTUGAL
Find Deal
jue., oct. 17 - vie., nov. 1
12:20 pm - 7:15 pmOPO-IAD
11h 55m1 stop
10:45 pm - 7:35 amIAD-OPO
27h 50m2 stops
$547Iberia
Find Deal
sáb., sep. 14 - lun., sep. 23
12:30 pm - 6:50 pmOPO-IAD
11h 20m1 stop
5:35 pm - 10:55 amIAD-OPO
12h 20m1 stop
$550TAP AIR PORTUGAL
Find Deal
sáb., sep. 14 - lun., sep. 23
8:40 am - 4:15 pmOPO-IAD
12h 35m1 stop
8:45 pm - 7:55 amIAD-OPO
30h 10m1 stop
$557SWISS
Find Deal
jue., sep. 19 - jue., sep. 26
8:40 am - 4:15 pmOPO-IAD
12h 35m1 stop
8:45 pm - 1:45 pmIAD-OPO
36h 00m2 stops
$585SWISS
Find Deal
jue., sep. 19 - jue., sep. 26
6:00 am - 1:30 pmOPO-IAD
12h 30m1 stop
8:21 am - 3:25 pmIAD-OPO
27h 04m2 stops
$607United Airlines
Find Deal
jue., oct. 17 - vie., nov. 1
2:35 pm - 4:15 pmOPO-IAD
30h 40m2 stops
8:45 pm - 7:10 pmIAD-OPO
17h 25m2 stops
$613SWISS
Find Deal
jue., sep. 19 - jue., sep. 26
12:10 pm - 3:18 pmOPO-IAD
32h 08m2 stops
8:21 am - 3:25 pmIAD-OPO
27h 04m2 stops
$646United Airlines
Find Deal
jue., oct. 17 - vie., nov. 1
4:35 pm - 4:05 pmOPO-IAD
28h 30m1 stop
5:15 pm - 10:25 amIAD-OPO
12h 10m1 stop
$971Lufthansa
Find Deal
dom., jun. 23 - jue., jun. 27
11:10 am - 4:05 pmOPO-IAD
33h 55m2 stops
5:15 pm - 10:25 amIAD-OPO
12h 10m1 stop
$990Lufthansa
Find Deal
dom., jun. 23 - jue., jun. 27

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, Thursday is the cheapest day to fly on average and Wednesday is the most expensive. Flying from Washington Dulles Airport back to Porto, the best deals are generally found on Sunday, with Monday 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 $521 on TAP AIR PORTUGAL, followed by Iberia ($547). One-way flight deals have also been found from as low as $461 on PLAY and from $515 on Iberia.

Good to know

High season

September

Cheapest flight

$386
Most popular time to fly and prices are also 22% 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 $386 for a one-way ticket and $521 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?

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

  • 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 1473 reviews
7.3Food
8.4Crew
7.8Boarding
7.6Comfort
7.2Entertainment
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

The flight crew was top notch. Total professionals, they worked to help everyone fit their luggage on board and get comfortable. Like many European airlines, dinner service included wine with no extra charge. Always a nice touch. On our layover, everyone needed to clear passport control, which looks like a horrible time sink when you have a connection. My compliments to the ground crew who tried to move people with tight connects to the front of the line. I don't know whether they were Air Portugal employees or not, but they were some people's heroes. I'm not a fan of airline pricing that doesn't give you a reasonably realistic idea of your total cost. Checked baggage on Air Portugal is very expensive and negates any other price advantage. Seat selection is also quite costly. My biggest complaint about this airline is their boarding process. There is no info available to passengers on the screens in the boarding lounges. Just long lines that stretch into other gate areas and too few people offering any clarifying info at all. Those who try to direct often ended up yelling into the crowd. On my last leg, they called for boarding groups over the PA system, but when I presented myself, I was sent back to the end of the single line even though others in later groups were ahead of me. It was a confusing mashup of two systems that left everyone disgruntled and took over an hour. I don't think I can recommend this airline if you have any other options.

Tap air portugal first has you pay for the flight. Then you realize that seats are extra. Had i known that i would have booked emirates instead for a few dollars more

Dreadful - queued to get onto a bus, stood for 10 minutes on the bus, drove to the plane, stood for another 25 minutes on the bus outside the plane. When allowed on we could only board from the front & were seated in the furthest row back. The second bus was allowed to board from the back so chaos ensued!. The flight was an hour late - nobody said why, nobody apologised. On arrival at Heathrow we stood for nearly 30 minutes before being allowed off - again with no explanation,

Efficiency was great - on-time takeoff and landing. Baggage arrived at destination (there's always slow baggage handling in Boston.) TAP food is spartan - bring your own. But the efficiency of the airline more than makes up for the mediocre cuisine.

On-time flight. Nothing out of the ordinary. The food offering upfront could be better.

Delayed takeoff was inconvenient. We should have boardrd later. Coffee/ beverage service on a 7:30 flight would have been good.

Flight from Lisbon to Barcelona was ok. Business flight Boston to Lisbon was awful. Attendants should pay more attention to Business Passengers and not be so stingy with water. Worse Business Flight I have ever taken. Food was awful. Cramped for space.

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.

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.
6/15sáb.
2 stops
50h 25mOPO-IAD
$386
6/15sáb.
1 stopPLAY
25h 45mOPO-IAD
$461
10/21lun.
2 stops
26h 00mOPO-IAD
$471
10/21lun.
1 stopIberia
31h 40mOPO-IAD
$515
8/8jue.
1 stopTAP AIR PORTUGAL
23h 50mOPO-IAD
$626
7/22lun.
1 stopTAP AIR PORTUGAL
27h 05mOPO-IAD
$659
7/19vie.
1 stopRoyal Air Maroc
29h 20mOPO-IAD
$680
7/7dom.
1 stopRoyal Air Maroc
30h 00mOPO-IAD
$694
7/18jue.
1 stopSWISS
18h 10mOPO-IAD
$783
7/18jue.
1 stopSWISS
18h 10mOPO-IAD
$799

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Last minute flights from Porto to Dulles Intl

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Porto to Washington, D.C. that are departing in the next 10 days.
6/15sáb.
multi-stopLufthansa
18h 10mOPO-IAD
7/1lun.
multi-stopLufthansa
20h 05mIAD-OPO
$876
6/15sáb.
multi-stopUnited Airlines
19h 45mOPO-IAD
7/1lun.
multi-stopUnited Airlines
27h 30mIAD-OPO
$877
6/15sáb.
multi-stopUnited Airlines
19h 45mOPO-IAD
7/1lun.
multi-stopUnited Airlines
12h 30mIAD-OPO
$1,027

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Porto - Washington Dulles Airport Flights

Departure:

Porto (OPO)Portugal

Destination:

Washington Dulles Airport (IAD)United States

Return flight deals:

Washington Dulles Airport - Porto

Cabin classes: