DCA - OPO

$469 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 10/23. 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 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Useful Info
Flights Deals

Cheap Flights from Reagan-National to Porto

 
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.

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

KAYAK's recommended round-trip deals from the most popular airlines that fly from Reagan-National to Porto.
Discover the best prices for you by selecting your travel dates on KAYAK.
United Airlines Logo
7:00 pm - 9:45 amDCA-OPO
9h 45m1 stop
United Airlines Logo
6:00 am - 8:43 pmOPO-DCA
19h 43m2 stops
$503United Airlines
Find Deal
Mon, Oct 20 - Wed, Nov 5
American Airlines Logo
12:34 pm - 7:35 amDCA-OPO
14h 01m2 stops
American Airlines Logo
8:20 am - 8:21 pmOPO-DCA
17h 01m2 stops
$508American Airlines
Find Deal
Mon, Oct 13 - Wed, Nov 5
Air Canada Logo
9:40 am - 11:25 amDCA-OPO
20h 45m2 stops
Air Canada Logo
6:00 am - 10:37 pmOPO-DCA
20h 37m2 stops
$580Air Canada
Find Deal
Wed, Oct 22 - Fri, Oct 31
United Airlines Logo
5:00 pm - 9:45 amDCA-OPO
11h 45m1 stop
United Airlines Logo
6:00 am - 10:16 pmOPO-DCA
21h 16m2 stops
$603United Airlines
Find Deal
Mon, Oct 13 - Wed, Nov 5
Air Canada Logo
12:55 pm - 9:20 amDCA-OPO
15h 25m2 stops
Air Canada Logo
12:10 pm - 12:03 pmOPO-DCA
28h 53m2 stops
$637Air Canada
Find Deal
Wed, Jul 30 - Thu, Aug 21
Air Canada Logo
6:50 pm - 9:35 amDCA-OPO
33h 45m2 stops
Air Canada Logo
12:10 pm - 9:48 pmOPO-DCA
14h 38m1 stop
$644Air Canada
Find Deal
Sun, Aug 3 - Thu, Aug 21
British Airways Logo
2:54 pm - 7:30 pmDCA-OPO
23h 36m2 stops
British Airways Logo
8:20 pm - 11:17 pmOPO-DCA
31h 57m2 stops
$676British Airways
Find Deal
Tue, Jul 22 - Wed, Aug 20
Delta Logo
12:10 pm - 8:25 amDCA-OPO
15h 15m2 stops
Delta Logo
9:20 am - 10:52 pmOPO-DCA
18h 32m2 stops
$685Delta
Find Deal
Tue, Jul 22 - Wed, Aug 20
British Airways Logo
5:00 pm - 7:50 pmDCA-OPO
21h 50m2 stops
British Airways Logo
9:10 pm - 11:00 pmOPO-DCA
30h 50m2 stops
$692British Airways
Find Deal
Mon, Sep 8 - Mon, Sep 22
Delta Logo
4:39 pm - 7:15 pmDCA-OPO
21h 36m2 stops
Delta Logo
4:20 pm - 10:15 amOPO-DCA
22h 55m2 stops
$781Delta
Find Deal
Tue, May 20 - Tue, May 27
Useful Info

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 United Airlines ($503) and American Airlines ($508).

Good to know

Low seasonNovember
High seasonMay
Cheapest flight$469
Best time to beat the crowds with an average 45% drop in price.
Most popular time to fly and prices are also 19% lower on average.
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 $469 for a one-way ticket and $503 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.

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 8701 reviews
7.3Comfort
8.1Crew
7.1Entertainment
6.6Food
7.7Boarding
Airline reviews

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

10.0 ExcellentAnonymous, Apr 2025SFO - HKG
Read more United Airlines reviews

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Multiple delays and not straight answer from the United team

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

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.

The flight was heavily booked so boarding was a lengthy process. The FA’s were rather abrupt during this process but became more gracious as the flight went on. Breakfast (puffed pastry and chewy sausage) was pretty horrible but there was fruit and yogurt which they didn’t mess up. Overall it was fine.

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.