DCA - OPO

$359 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 9/9. 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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Flights 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

Wed, Oct 15 - Wed, Oct 22
 Logo
11:00 am - 10:00 amDCA-OPO
18h 00m2 stops
 Logo
7:15 am - 6:04 pmOPO-DCA
15h 49m2 stops
Tue, Oct 28 - Tue, Nov 18
Air Canada Logo
11:05 am - 6:30 pmDCA-OPO
27h 25m2 stops
Air Canada Logo
6:00 am - 8:40 pmOPO-DCA
19h 40m2 stops
$503Air Canada
Find Deal
Wed, Nov 5 - Mon, Nov 10
British Airways Logo
5:58 pm - 4:05 pmDCA-OPO
17h 07m2 stops
British Airways Logo
8:40 pm - 7:15 pmOPO-DCA
27h 35m2 stops
$538British Airways
Find Deal
Wed, Oct 22 - Fri, Oct 31
American Airlines Logo
10:51 am - 7:35 amDCA-OPO
15h 44m2 stops
American Airlines Logo
8:20 am - 10:00 pmOPO-DCA
17h 40m2 stops
$559American Airlines
Find Deal
Tue, Aug 19 - Thu, Aug 28
United Airlines Logo
3:14 pm - 7:45 amDCA-OPO
11h 31m1 stop
United Airlines Logo
12:10 pm - 9:48 pmOPO-DCA
14h 38m1 stop
$583United Airlines
Find Deal
Tue, Oct 14 - Tue, Oct 28
British Airways Logo
6:38 am - 7:30 pmDCA-OPO
31h 52m2 stops
British Airways Logo
12:25 pm - 10:57 pmOPO-DCA
14h 32m2 stops
$586British Airways
Find Deal
Fri, Dec 5 - Tue, Dec 9
Delta Logo
6:00 am - 10:50 amDCA-OPO
23h 50m2 stops
Delta Logo
11:45 am - 6:05 pmOPO-DCA
35h 20m2 stops
$591Delta
Find Deal
Fri, Dec 5 - Tue, Dec 9
Delta Logo
6:00 am - 10:50 amDCA-OPO
23h 50m2 stops
Delta Logo
5:00 am - 4:32 pmOPO-DCA
16h 32m2 stops
$592Delta
Find Deal
Wed, Oct 1 - Wed, Oct 8
American Airlines Logo
10:49 am - 7:35 amDCA-OPO
15h 46m2 stops
American Airlines Logo
12:20 pm - 10:57 pmOPO-DCA
15h 37m2 stops
$608American Airlines
Find Deal
Thu, Aug 21 - Thu, Aug 28
United Airlines Logo
3:25 pm - 7:05 amDCA-OPO
10h 40m1 stop
United Airlines Logo
12:10 pm - 2:22 pmOPO-DCA
31h 12m2 stops
$630United Airlines
Find Deal
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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.

How much is a round-trip flight from Washington, D.C. Reagan-National Airport to Porto?

Good to know

High seasonJune
Cheapest flight$359
Most popular time to fly with an average 23% 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 $359 for a one-way ticket and $446 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 8861 reviews
7.0Entertainment
7.3Comfort
8.1Crew
7.7Boarding
6.6Food
Airline reviews

We love united ! We would like to acknowledge Aimee in the lounge near gate 130

10.0 ExcellentGal, Jul 2025EWR - NCE
Read more United Airlines reviews

We love united ! We would like to acknowledge Aimee in the lounge near gate 130

Boarded plane and then delayed 1.5 hours while on the plane

Although the flight was delayed the crew and the flight itself were very good. Couldn't fault anything and after the disappointment of being abandoned in the US by BA it was a welcome relief to travel with United

Survey sent before we actually left. Delay after delay. Now a crew problem.

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.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

When I booked it on Kayak it aaid that I wasn't allowed hamd luggage. I called United Airlines and it took them 6 minutes to figure out if I was allowed free hand luggage. Surely something that simple they should be able to tell me instantly.

We were delayed in Toronto on the tarmac for THREE hours with no clear indication as to why except that it was not a safety hazard. Pilot did apologize more than once but even he was unable to explain why exactly we were delayed. I overheard the stewards saying that the captain was very frustrated with the situation as well because he was not able to explain why except it had something to do with water supply or system on the aircraft and now we needed to wait for an engineer to approve the aircraft for flight. It was very frustrating and distressing as a passenger and we should have been given complimentary meals at the very least.

Flight was cramped with every seat taken. The food was fine, nothing crazy to write home about. The plane felt dated and needing some TLC, the button for the window shade didn't work and there were no AC outlets to use. When communicating with staff all except one nice lady never seemed happy to help me almost like I was bothering them when asked for things like a glass of water or a snack. The flight was overall fine. It did what was needed which is get me from point A to point B. But it certainly was not special. I don't expect much in economy but I believe economy on a host of other airlines is more memorable and better experience.

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

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