DCA - OPO

$346 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 11/1. 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, 0 bags

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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Everything you should know

Cheapest round-trip
$742
United Airlines
Mon 10/26Fri 11/6
DCA - OPO • 1 stop
Cheapest one-way
$346
KLM
Sun 11/1
DCA - OPO • 1 stop
Top airlines
United Airlines
Cheapest • from $742 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Reagan-National and Porto. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Madrid (MAD)
Cheapest • Avg $496 (round-trip)
Madrid (MAD)
Shortest trip • 10h 00m (one-way)
Insights
Insights
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Insights
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Porto!
Flight Deals
Booking Insights
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

Mon, Oct 26 - Fri, Nov 6
United Airlines Logo
6:00 pm - 9:30 am
DCA
-
OPO
11h 30m
1 stop
United Airlines Logo
6:00 am - 7:33 pm
OPO
-
DCA
18h 33m
2 stops
$742United Airlines
Wed, Oct 28 - Tue, Nov 3
Delta Logo
11:00 am - 8:05 am
DCA
-
OPO
17h 05m
1 stop
Delta Logo
5:00 am - 10:53 pm
OPO
-
DCA
22h 53m
2 stops
$743Delta
Wed, Oct 28 - Tue, Nov 10
Delta Logo
5:00 pm - 8:05 am
DCA
-
OPO
11h 05m
1 stop
Delta Logo
11:15 am - 11:04 pm
OPO
-
DCA
16h 49m
2 stops
$744Delta
Mon, Oct 26 - Thu, Nov 5
United Airlines Logo
6:00 pm - 9:30 am
DCA
-
OPO
11h 30m
1 stop
United Airlines Logo
6:00 am - 7:19 am
OPO
-
DCA
30h 19m
2 stops
$747United Airlines
Mon, Oct 26 - Wed, Nov 4
Delta Logo
3:30 pm - 10:30 am
DCA
-
OPO
15h 00m
2 stops
Delta Logo
5:00 am - 6:05 pm
OPO
-
DCA
18h 05m
2 stops
$748Delta
Mon, Oct 26 - Fri, Nov 6
United Airlines Logo
4:30 pm - 9:30 am
DCA
-
OPO
13h 00m
1 stop
United Airlines Logo
12:35 pm - 7:33 pm
OPO
-
DCA
11h 58m
1 stop
$751United Airlines
Tue, Oct 27 - Wed, Nov 4
Delta Logo
8:30 pm - 3:25 pm
DCA
-
OPO
14h 55m
2 stops
Delta Logo
11:15 am - 11:04 pm
OPO
-
DCA
16h 49m
2 stops
$753Delta
Tue, Oct 27 - Tue, Nov 3
American Airlines Logo
2:55 pm - 11:45 am
DCA
-
OPO
16h 50m
2 stops
American Airlines Logo
8:20 am - 6:51 pm
OPO
-
DCA
15h 31m
2 stops
$755American Airlines
Mon, Sep 21 - Tue, Sep 29
Multiple Airlines Logo
6:00 pm - 11:45 am
DCA
-
OPO
12h 45m
2 stops
Multiple Airlines Logo
8:20 am - 9:30 pm
OPO
-
DCA
18h 10m
2 stops
$756Multiple Airlines
Mon, Oct 19 - Tue, Oct 27
Delta Logo
5:00 pm - 10:30 am
DCA
-
OPO
12h 30m
1 stop
Delta Logo
5:00 am - 11:04 pm
OPO
-
DCA
22h 04m
2 stops
$773Delta
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 United Airlines ($742) and Delta ($743).

Find deals

Good to know

Cheapest flight$346
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 $346 for a one-way ticket and $742 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 is the only airline alliance operating flights between Reagan Washington National Airport and Porto.

  • 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 9699 reviews
8.1Crew
7.1Entertainment
7.3Comfort
7.7Boarding
6.6Food
Airline reviews

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

4.0 OkayManoj, May 2026
IAD - BRU
Read more United Airlines reviews

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

After arriving in Chicago, we were taxiing for 1.5 hours with infrequent and untruthful updates about the amount of time it would take to arrive at the gate. Minimally, the team could have provided timing expectations that were more truthful, especially one their original expectations were not met.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

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)