DCA - OPO

$335 Find Cheap Flights from Reagan Washington National Airport to Porto - Compare and Save

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 10/12. 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

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Everything you should know

Cheapest round-trip
$801
United Airlines
Mon 10/12Fri 10/23
DCA - OPO • 1 stop
Cheapest one-way
$335
Air Canada
Mon 10/12
DCA - OPO • 2 stops
Top airlines
United Airlines
Cheapest • from $801 (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
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Top layover airports
Lisbon (LIS)
Cheapest • Avg $737 (round-trip)
Newark (EWR)
Shortest trip • 10h 15m (one-way)
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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

Mon, Oct 12 - Fri, Oct 23
United Airlines Logo
6:00 am - 7:00 am
DCA
-
OPO
20h 00m
1 stop
United Airlines Logo
6:00 am - 9:59 pm
OPO
-
DCA
20h 59m
2 stops
$801United Airlines
Sun, Oct 11 - Fri, Oct 23
United Airlines Logo
5:55 pm - 9:45 am
DCA
-
OPO
10h 50m
1 stop
United Airlines Logo
6:00 am - 9:59 pm
OPO
-
DCA
20h 59m
2 stops
$802United Airlines
Wed, Oct 7 - Fri, Oct 23
Delta Logo
5:05 pm - 10:30 am
DCA
-
OPO
12h 25m
1 stop
Delta Logo
11:25 am - 11:37 pm
OPO
-
DCA
17h 12m
2 stops
$803Delta
Fri, Aug 21 - Fri, Aug 28
Multiple Airlines Logo
4:20 pm - 8:50 pm
DCA
-
OPO
23h 30m
2 stops
Multiple Airlines Logo
6:00 pm - 3:38 pm
OPO
-
DCA
26h 38m
3 stops
$807Multiple Airlines
Sat, Aug 29 - Fri, Sep 11
Multiple Airlines Logo
11:00 am - 9:20 pm
DCA
-
OPO
29h 20m
2 stops
Multiple Airlines Logo
9:45 pm - 9:50 pm
OPO
-
DCA
29h 05m
2 stops
$809Multiple Airlines
Sun, Oct 11 - Tue, Oct 27
Delta Logo
5:05 pm - 10:25 am
DCA
-
OPO
12h 20m
1 stop
Delta Logo
11:30 am - 11:09 pm
OPO
-
DCA
15h 39m
2 stops
$810Delta
Mon, Oct 12 - Mon, Oct 19
Multiple Airlines Logo
8:32 am - 7:40 am
DCA
-
OPO
18h 08m
2 stops
Multiple Airlines Logo
8:20 am - 11:06 pm
OPO
-
DCA
19h 46m
2 stops
$811Multiple Airlines
Sun, Oct 25 - Mon, Oct 26
Multiple Airlines Logo
11:05 am - 12:50 pm
DCA
-
OPO
21h 45m
2 stops
Multiple Airlines Logo
8:40 pm - 6:27 pm
OPO
-
DCA
25h 47m
2 stops
$812Multiple Airlines
Tue, Aug 11 - Fri, Sep 18
Multiple Airlines Logo
9:40 am - 7:00 am
DCA
-
OPO
16h 20m
1 stop
Multiple Airlines Logo
8:20 am - 11:10 pm
OPO
-
DCA
19h 50m
2 stops
$814Multiple Airlines
Mon, Aug 24 - Mon, Aug 31
Multiple Airlines Logo
9:40 am - 7:00 am
DCA
-
OPO
16h 20m
1 stop
Multiple Airlines Logo
8:20 am - 8:59 pm
OPO
-
DCA
17h 39m
2 stops
$817Multiple Airlines
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 5 days.

In the past 5 days, the cheapest round-trip tickets from Reagan Washington National Airport to Porto were found on United Airlines ($801) and Delta ($803).

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Good to know

Cheapest flight$335
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 5 days, the lowest price for a flight from Washington, D.C. Reagan-National Airport to Porto was $335 for a one-way ticket and $801 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 9948 reviews
6.7Food
7.3Comfort
7.7Boarding
8.1Crew
7.1Entertainment
Airline reviews

Staff could’ve been a little more cordial. The men were much more friendlier than the women. My daughter and I also missed the 2nd to last meal as we were sleeping but that is on us.

8.0 ExcellentAmit, Jun 2026
IAD - CPT
Read more United Airlines reviews

Staff could’ve been a little more cordial. The men were much more friendlier than the women. My daughter and I also missed the 2nd to last meal as we were sleeping but that is on us.

Over 5 hour delay with minimal updates or ability to standby for alternative flights. During boarding and 1 hr+ wait for takeoff, seats were drenched w water from air conditioning condensation and always leftover crumbs on carpet and seats

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.

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.

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

Never nice, United Express partners always do an amazing job.

Being stick waiting for gate at ORD cause me to almost miss my connecting flight…being deaf United made no no effort to keep me updated as I couldn’t hear the PA

The flight was on time and the crew were great.

I was forced to gate check my carry on luggage. Somehow it did not arrive at my destination. I still have yet to receive my bag r days after arrival.

Boarding area is a mess. Lines not bounded and gate area too small. Food options (on this specific flight) were poor and you couldn’t pick part of it since it was like a mash of chicken and other unrecognisable stuff. Comfort of seats along with child noise made it difficult to get a good sleep. Last, the flight attendant that served my aisle was rude (others seemed fine) towards me and others.

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)