DCA - OPO

$338 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 9/1. 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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Flight Deals

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 - Mon, Nov 10
Iberia Logo
2:59 pm - 7:40 amDCA-OPO
12h 41m2 stops
Iberia Logo
12:25 pm - 7:10 pmOPO-DCA
35h 45m2 stops
$570Iberia
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Mon, Aug 25 - Tue, Sep 9
Air Canada Logo
6:00 am - 9:35 amDCA-OPO
22h 35m1 stop
Air Canada Logo
12:50 pm - 12:08 pmOPO-DCA
28h 18m2 stops
$577Air Canada
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Mon, Aug 25 - Tue, Sep 9
Air Canada Logo
6:59 am - 9:35 amDCA-OPO
21h 36m2 stops
Air Canada Logo
12:50 pm - 10:34 pmOPO-DCA
14h 44m2 stops
$586Air Canada
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Sat, Nov 15 - Sat, Nov 22
United Airlines Logo
7:00 pm - 9:30 amDCA-OPO
9h 30m1 stop
United Airlines Logo
12:35 pm - 7:35 pmOPO-DCA
12h 00m1 stop
$594United Airlines
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Mon, Sep 22 - Mon, Sep 29
United Airlines Logo
4:35 pm - 9:35 amDCA-OPO
12h 00m1 stop
United Airlines Logo
12:10 pm - 6:04 pmOPO-DCA
34h 54m2 stops
$601United Airlines
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Sun, Sep 21 - Fri, Oct 3
American Airlines Logo
6:00 pm - 3:55 pmDCA-OPO
16h 55m2 stops
American Airlines Logo
8:15 am - 9:19 pmOPO-DCA
18h 04m2 stops
$608American Airlines
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Mon, Sep 1 - Sun, Sep 7
Logo
7:00 am - 9:45 amDCA-OPO
21h 45m1 stop
Logo
11:20 am - 10:20 amOPO-DCA
28h 00m1 stop
$682
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Sun, Aug 31 - Fri, Sep 5
British Airways Logo
7:20 pm - 8:20 pmDCA-OPO
20h 00m2 stops
British Airways Logo
11:15 am - 10:28 amOPO-DCA
28h 13m2 stops
$709British Airways
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Fri, Oct 3 - Sat, Oct 11
American Airlines Logo
6:00 pm - 11:40 amDCA-OPO
12h 40m2 stops
American Airlines Logo
8:15 am - 7:14 pmOPO-DCA
15h 59m2 stops
$728American Airlines
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Mon, Sep 1 - Sun, Sep 7
British Airways Logo
7:20 pm - 7:50 pmDCA-OPO
19h 30m2 stops
British Airways Logo
9:25 pm - 7:58 pmOPO-DCA
27h 33m2 stops
$777British Airways
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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 Iberia ($570) and Air Canada ($577).

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Good to know

Cheapest flight$338
Most popular time to fly with an average 26% increase in price.
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 $338 for a one-way ticket and $570 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, SkyTeam, and oneworld 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 8925 reviews
6.6Food
8.1Crew
7.3Comfort
7.7Boarding
7.1Entertainment
Airline reviews

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

10.0 ExcellentAnonymous, Aug 2025TPA - IAD
Read more United Airlines reviews

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

The flight was comfortable with the exit row and great service

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

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

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

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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