$325 Find Cheap Flights from Reagan Washington National Airport to Portugal

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 Portugal departing on 5/10. 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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Cheap Flights from Reagan-National to Portugal

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lisbon
Lisbon2 stops$604
Porto
Porto2 stops$664
Faro
Faro2 stops$636
Funchal
Funchal2 stops$1,041
Ponta Delgada
Ponta Delgada1 stop$789
Lisbon
Lisbon2 stops$604
Porto
Porto2 stops$664
Faro
Faro2 stops$636
Funchal
Funchal2 stops$1,041
Ponta Delgada
Ponta Delgada1 stop$789

Book Cheap Reagan-National to Portugal Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Reagan-National to Portugal 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 Portugal

Mon, Apr 27 - Wed, May 6
Scandinavian Airlines Logo
11:00 am - 10:05 pm
DCA
-
LIS
30h 05m
2 stops
Scandinavian Airlines Logo
12:45 pm - 11:24 pm
LIS
-
DCA
39h 39m
2 stops
$604Scandinavian Airlines
Tue, Apr 21 - Thu, May 7
Multiple Airlines Logo
11:00 am - 10:05 pm
DCA
-
LIS
30h 05m
2 stops
Multiple Airlines Logo
7:00 am - 11:24 pm
LIS
-
DCA
21h 24m
2 stops
$609Multiple Airlines
Mon, Apr 13 - Wed, Apr 29
Scandinavian Airlines Logo
11:00 am - 10:05 pm
DCA
-
LIS
30h 05m
2 stops
Scandinavian Airlines Logo
12:45 pm - 10:41 pm
LIS
-
DCA
38h 56m
2 stops
$633Scandinavian Airlines
Sun, Apr 19 - Thu, Apr 30
Scandinavian Airlines Logo
6:00 am - 4:00 pm
DCA
-
LIS
29h 00m
2 stops
Scandinavian Airlines Logo
7:00 am - 10:41 pm
LIS
-
DCA
20h 41m
2 stops
$634Scandinavian Airlines
Mon, Apr 13 - Wed, Apr 29
United Airlines Logo
11:55 am - 2:30 pm
DCA
-
FAO
21h 35m
2 stops
United Airlines Logo
3:25 pm - 5:25 pm
FAO
-
DCA
31h 00m
2 stops
$636United Airlines
Mon, Apr 13 - Wed, Apr 29
KLM Logo
7:56 pm - 7:25 pm
DCA
-
FAO
18h 29m
2 stops
KLM Logo
8:10 am - 10:41 pm
FAO
-
DCA
19h 31m
2 stops
$654KLM
Mon, Apr 27 - Mon, May 4
KLM Logo
7:38 pm - 7:20 am
DCA
-
FAO
30h 42m
2 stops
KLM Logo
9:45 pm - 8:33 pm
FAO
-
DCA
27h 48m
2 stops
$655KLM
Tue, Apr 21 - Tue, Apr 28
American Airlines Logo
1:25 pm - 7:40 am
DCA
-
OPO
13h 15m
2 stops
American Airlines Logo
12:25 pm - 10:29 pm
OPO
-
DCA
15h 04m
2 stops
$664American Airlines
Wed, Apr 15 - Mon, Apr 20
United Airlines Logo
11:55 am - 2:30 pm
DCA
-
FAO
21h 35m
2 stops
United Airlines Logo
3:25 pm - 9:06 pm
FAO
-
DCA
34h 41m
2 stops
$685United Airlines
Mon, Aug 3 - Wed, Aug 19
Air Canada Logo
12:40 pm - 7:00 am
DCA
-
OPO
37h 20m
2 stops
Air Canada Logo
2:25 pm - 12:00 pm
OPO
-
DCA
50h 35m
2 stops
$704Air Canada
Booking Insights

KAYAK's insights & trends for Reagan-National to Portugal flights

Get data-powered insights and trends into flights from Reagan-National to Portugal to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Washington, D.C. Reagan-National Airport to Portugal?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Reagan-National Airport to Portugal, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Reagan-National Airport to Portugal is November, when tickets cost $664 (return) on average. On the other hand, the most expensive months are April and February, when the average cost of round-trip tickets is $3,345 and $1,755 respectively.

Good to know

Low seasonDecember
Cheapest flight$389
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 18% lower on average.
Flight from Reagan Washington National Airport to Lisbon

FAQs - booking Portugal flights

  • How does KAYAK find such low prices on flights from Reagan Washington National Airport to Portugal?

    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 Portugal.

  • 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 Portugal?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Reagan Washington National Airport to Portugal 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 Portugal?

    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 from Reagan Washington National Airport to Portugal with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Reagan Washington National Airport to Portugal?

    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 from Reagan Washington National Airport to Portugal 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 Portugal

 
Need help choosing which airline to fly with from Reagan-National to Portugal? 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 9427 reviews
7.3Comfort
6.6Food
8.1Crew
7.1Entertainment
7.7Boarding
Airline reviews

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

4.0 OkayOlga, Mar 2026
IAD - TYS
Read more United Airlines reviews

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.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Sat next to a one year old. She crawled all over the place and made me laugh.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

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

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