DCA - OPO

$389 Find Cheap Flights from Reagan Washington National Airport to Porto

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Reagan-National to Porto departing on 11/11. 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
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Porto

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Porto, 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 Washington, D.C. to Porto, as well as popular online travel agencies
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Cheap Flights from Reagan-National to Porto (DCA-OPO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Reagan-National to Porto 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Reagan-National to Porto

Fri, Oct 31 - Tue, Nov 4
Delta Logo
4:50 pm - 3:25 pmDCA-OPO
18h 35m2 stops
Delta Logo
11:25 am - 10:59 pmOPO-DCA
16h 34m2 stops
$541Delta
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Wed, Oct 22 - Fri, Oct 31
British Airways Logo
2:55 pm - 3:55 pmDCA-OPO
20h 00m2 stops
British Airways Logo
8:40 pm - 10:15 pmOPO-DCA
29h 35m2 stops
$551British Airways
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Mon, Sep 29 - Tue, Oct 7
Multiple Airlines Logo
9:40 am - 3:55 pmDCA-OPO
25h 15m2 stops
Multiple Airlines Logo
10:00 pm - 9:51 pmOPO-DCA
28h 51m2 stops
$558Multiple Airlines
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Fri, Nov 7 - Sat, Nov 15
Iberia Logo
1:44 pm - 7:40 amDCA-OPO
12h 56m2 stops
Iberia Logo
8:20 am - 10:05 pmOPO-DCA
18h 45m2 stops
$560Iberia
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Mon, Sep 29 - Tue, Oct 7
Multiple Airlines Logo
11:00 am - 3:55 pmDCA-OPO
23h 55m3 stops
Multiple Airlines Logo
10:00 pm - 9:51 pmOPO-DCA
28h 51m2 stops
$565Multiple Airlines
Find Deal
Fri, Nov 14 - Sat, Nov 22
United Airlines Logo
6:00 pm - 9:30 amDCA-OPO
10h 30m1 stop
United Airlines Logo
6:00 am - 8:58 amOPO-DCA
31h 58m2 stops
$566United Airlines
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Fri, Nov 7 - Sun, Nov 16
American Airlines Logo
12:30 pm - 7:40 amDCA-OPO
14h 10m2 stops
American Airlines Logo
8:20 am - 9:30 pmOPO-DCA
18h 10m2 stops
$580American Airlines
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Wed, Oct 22 - Fri, Oct 31
Delta Logo
5:00 pm - 3:30 pmDCA-OPO
17h 30m2 stops
Delta Logo
6:30 am - 11:52 pmOPO-DCA
21h 22m2 stops
$587Delta
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Tue, Oct 7 - Wed, Nov 5
United Airlines Logo
1:00 pm - 11:15 amDCA-OPO
17h 15m2 stops
United Airlines Logo
12:35 pm - 8:38 pmOPO-DCA
13h 03m1 stop
$626United Airlines
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Tue, Sep 30 - Wed, Oct 8
American Airlines Logo
10:49 am - 7:35 amDCA-OPO
15h 46m2 stops
American Airlines Logo
8:15 am - 8:16 pmOPO-DCA
17h 01m2 stops
$641American Airlines
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Everything you should know

Top airlines
Delta
Cheapest • from $541 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$541
Delta
Fri 10/31Tue 11/4
DCA - OPO • 2 stops
Cheapest one-way
$389
United Airlines
Tue 11/11
DCA - OPO • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
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Booking Insights

KAYAK's insights & trends for Reagan-National to Porto flights

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

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

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Reagan Washington National Airport to Porto were found on Delta ($541) and British Airways ($551).

Find deals

Good to know

Cheapest flight$389
Flight from Reagan Washington National Airport to Porto

When to book flights from Reagan-National to Porto

Are your dates flexible? Find out the best times to travel from Reagan-National to Porto 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 Reagan Washington National Airport to Porto flights

  • What is the cheapest flight from Washington, D.C. Reagan-National Airport to Porto?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Reagan-National Airport to Porto was $389 for a one-way ticket and $541 for a round-trip.

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

    Yes, you’ll need a passport to travel to Porto from Reagan Washington National Airport.

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

    When flying out of Reagan Washington National Airport you will be using Washington, D.C. Reagan-National. You will be landing at Porto, also known as Porto.

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

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

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

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

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

    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 Reagan Washington National Airport to Porto.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto from Reagan Washington National Airport 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 Reagan Washington National Airport to Porto?

    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 Porto with an airline and back to Reagan Washington National Airport with another airline. Booking your flights between Reagan Washington National Airport and OPO 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 Reagan Washington National Airport to Porto?

    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 Porto from Reagan Washington National Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Reagan-National to Porto

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Porto. 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 Reagan-National to Porto? 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.
7.4
United AirlinesOverall score based on 8926 reviews
7.7Boarding
7.1Entertainment
8.1Crew
7.3Comfort
6.6Food
Airline reviews

Terrible. They wouldn't allow me on my flight on the 14th..

2.0 MediocreJulian, Sep 2025DEN - DRO
Read more United Airlines reviews

Terrible. They wouldn't allow me on my flight on the 14th..

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We were given vouchers we couldn’t use with a 5.5 hour delay

Everything you need to know for your flight from Reagan-National to Porto

Information on your arrival and departure airports

Reagan Washington National Airport (DCA)
Porto (OPO)

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