OPO - IAD

$390 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 6/27. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl 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
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Flights Deals

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.

Recent round-trip flight deals from Porto to Dulles Intl

KAYAK's recommended round-trip deals from the most popular airlines that fly from Porto to Dulles Intl.
Discover the best prices for you by selecting your travel dates on KAYAK.
Iberia Logo
8:15 am - 3:00 pmOPO-IAD
11h 45m1 stop
Iberia Logo
4:35 pm - 11:40 amIAD-OPO
14h 05m1 stop
$471Iberia
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Wed, Oct 8 - Tue, Oct 21
KLM Logo
8:10 pm - 3:35 pmOPO-IAD
24h 25m1 stop
KLM Logo
6:30 pm - 3:30 pmIAD-OPO
16h 00m1 stop
$563KLM
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Wed, Oct 8 - Tue, Oct 21
KLM Logo
4:20 pm - 3:35 pmOPO-IAD
28h 15m1 stop
KLM Logo
5:25 pm - 10:15 pmIAD-OPO
23h 50m1 stop
$564KLM
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Mon, Sep 1 - Mon, Sep 8
American Airlines Logo
8:15 am - 3:00 pmOPO-IAD
11h 45m1 stop
American Airlines Logo
10:53 am - 7:35 amIAD-OPO
15h 42m2 stops
$569American Airlines
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Wed, Oct 8 - Tue, Oct 21
KLM Logo
6:15 am - 4:31 pmOPO-IAD
15h 16m2 stops
KLM Logo
6:30 pm - 3:30 pmIAD-OPO
16h 00m1 stop
$573KLM
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Wed, Oct 8 - Tue, Oct 21
Iberia Logo
8:15 am - 3:00 pmOPO-IAD
11h 45m1 stop
Iberia Logo
4:35 pm - 7:35 amIAD-OPO
10h 00m1 stop
$614Iberia
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Wed, Aug 20 - Wed, Oct 1
Lufthansa Logo
6:15 am - 3:50 pmOPO-IAD
14h 35m2 stops
Lufthansa Logo
6:10 pm - 11:20 pmIAD-OPO
24h 10m2 stops
$636Lufthansa
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Wed, Oct 8 - Tue, Oct 21
Lufthansa Logo
6:15 am - 3:50 pmOPO-IAD
14h 35m2 stops
Lufthansa Logo
6:10 pm - 11:20 pmIAD-OPO
24h 10m2 stops
$637Lufthansa
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Wed, Oct 8 - Tue, Oct 21
Air Canada Logo
12:10 pm - 11:13 amOPO-IAD
52h 03m2 stops
Air Canada Logo
9:45 am - 9:35 amIAD-OPO
18h 50m1 stop
$692Air Canada
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Mon, Sep 1 - Mon, Sep 8
Delta Logo
6:15 am - 3:35 pmOPO-IAD
14h 20m1 stop
Delta Logo
5:10 pm - 3:30 pmIAD-OPO
17h 20m2 stops
$755Delta
Find Deal
Wed, Aug 20 - Wed, Oct 1
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KAYAK's insights & trends for Porto to Dulles Intl flights

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 round-trip flights from Porto to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.

When flying from Porto to Washington Dulles Airport, you should consider leaving on a Monday and avoid Wednesdays if you are looking for the best rates. For your return to Porto, you’ll find the best rates on Sundays and the most expensive ones on Fridays.

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Good to know

Low seasonApril
High seasonOctober
Cheapest flight$390
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly and prices are also 7% 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 $390 for a one-way ticket and $471 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 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.

Top airline 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.
7.1
TAP AIR PORTUGALOverall score based on 1851 reviews
7.8Crew
7.0Boarding
6.3Entertainment
6.2Food
7.1Comfort
Airline reviews

Very pleasant flight, crew was very nice. The flight was really smooth, big plane. The seats are kind of close together, so comfort was just OK. The boarding process on the way back to New York was a little chaotic. It took a long time.There were no announcements, no loudspeaker just one staff yelling out of instructions and a lot of people crowding in before their term to board. So that could really be improved a lot.

8.0 ExcellentAnonymous, Apr 2025LIS - JFK
Read more TAP AIR PORTUGAL reviews

Very pleasant flight, crew was very nice. The flight was really smooth, big plane. The seats are kind of close together, so comfort was just OK. The boarding process on the way back to New York was a little chaotic. It took a long time.There were no announcements, no loudspeaker just one staff yelling out of instructions and a lot of people crowding in before their term to board. So that could really be improved a lot.

The crew was very nice. The food was good. The entertainment on the way back to Miami wasn’t as good as the flight over. I wanted to watch Wicked but on the way over from Miami to Lisbon but the screen didn’t work. On the way from Lisbon to Miami Wicked wasn’t an option. Liked the option to check out overhead carry on with our checked luggage Overall the flights were very good. I would fly TaP again

Delayed flight because other plane was occupying the gate for longer than expected. Once we boarded the plane had to wait 1 hour before taking off. We. Almost lost our connection flight and the baggage didn’t make it. We had to wait two days to receive our luggage. Hope they improve the timing or work with the airport to get better service.

Boarding went fast. Lisbon's gates are too small for the flights they serve.

Great pilot, textbook landing in madeira. Everything else, from booking to checkin, plane quality, seat amenities, crew engagement, and overall experience were significantly below standard. I WOULD NOT FLY TAP IF THERE IS ANY OTHER OPTION.

Worst: long walk to baggage claim Best: left on time

Got in on time. Food was the worst ever. Comfort was terrible. Check in was incredibly bad.

The flight schedules are better than some airlines. Their website is terrible, it doesn’t store any information so every time you fly you have to re-enter the data. The flight was late taking off but we still got to our destination on time.

Flight delayed by >1 hour. Long boarding involving riding a shuttle to the plane.

When I tried to enter my identity details, your app told me information was missing but did not highlight the missing data. This was frustrating. Also, there was an unexplained delay of about 2 hours in taking off. This was also frustrating. Otherwise the experience was good.

Everything you need to know for your flight from Porto to Dulles Intl

Information on your arrival and departure airports

Dulles Intl (IAD)
Porto (OPO)

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