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$244+ Cheap flights from Reagan-National (DCA) to Portugal

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — LIS
Mar 19 — Mar 261
Thu 3/19
Thu 3/26
1 adult, Economy
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Cheap flight deals from Reagan-National to Portugal

Cheapest flights from Reagan-National to Portugal
Explore the most affordable flight options available from Reagan-National to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 17, 2026.

This oojo deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:30 pm
DCA
-
OPO
2 stops42h 15m
British Airways
Mon 11/95:30 pm
OPO
-
DCA
2 stops29h 11m
British Airways
Deal found 2/15$571
This Booking.com deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/54:00 pm
DCA
-
OPO
2 stops45h 30m
Air Canada
Sat 12/126:00 am
OPO
-
DCA
2 stops31h 57m
Air Canada
Deal found 2/16$580
This Mytrip deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1211:05 am
DCA
-
LIS
2 stops18h 15m
Multiple Airlines
Wed 4/227:25 am
LIS
-
DCA
2 stops31h 54m
Multiple Airlines
Deal found 2/16$582
This United Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/248:10 pm
DCA
-
OPO
1 stop9h 20m
United Airlines
Wed 4/16:00 am
OPO
-
DCA
2 stops19h 15m
United Airlines
Deal found 2/13$583
This Delta deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/75:06 pm
DCA
-
OPO
2 stops17h 19m
Delta
Wed 4/155:00 am
OPO
-
DCA
2 stops18h 59m
Delta
Deal found 2/16$588
This United Airlines deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:00 am
DCA
-
OPO
1 stop20h 00m
United Airlines
Wed 8/192:25 pm
OPO
-
DCA
2 stops25h 19m
United Airlines
Deal found 2/14$594
This Priceline deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/151:25 pm
DCA
-
OPO
2 stops13h 15m
Iberia
Wed 4/228:20 am
OPO
-
DCA
2 stops15h 38m
Iberia
Deal found 2/15$595
This American Airlines deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/151:25 pm
DCA
-
OPO
2 stops13h 15m
American Airlines
Wed 5/612:25 pm
OPO
-
DCA
2 stops15h 04m
American Airlines
Deal found 2/14$596
This FlightHub deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:05 am
DCA
-
LIS
2 stops35h 00m
Scandinavian Airlines
Thu 9/312:10 pm
LIS
-
DCA
2 stops40h 02m
Scandinavian Airlines
Deal found 2/13$597
This Scandinavian Airlines deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/611:00 am
DCA
-
LIS
2 stops24h 00m
Multiple Airlines
Sun 5/107:00 am
LIS
-
DCA
2 stops21h 24m
Multiple Airlines
Deal found 2/16$602
This FlightHub deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/246:00 am
DCA
-
LIS
2 stops29h 10m
Multiple Airlines
Wed 4/294:25 pm
LIS
-
DCA
2 stops35h 16m
Multiple Airlines
Deal found 2/13$603
This British Airways deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/139:51 am
DCA
-
OPO
2 stops16h 49m
Multiple Airlines
Thu 5/78:20 am
OPO
-
DCA
2 stops15h 38m
Multiple Airlines
Deal found 2/15$608

Find flight deals from Reagan-National to Portugal

Keep the following information in mind while searching for Reagan-National to Portugal flight deals. Data was last updated February 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$582
(Mytrip)

One-way from

$244
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$690
Provider with most accurate pricing for Washington, D.C. (WAS)-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Lisbon Humberto Delgado flights.
Search Deals
From Washington, D.C. Reagan-National to Portugal
Search Deals
One-way flight from Washington, D.C. Reagan-National to Portugal
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($158 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 17, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Portugal that are best for you.

Fly from

Reagan-National

Fly to

Portugal

Route

Depart

Return

Price

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 3/24

8:10 pm-9:30 am

1 stop9h 20m

Porto

Wed 4/1

6:00 am-8:15 pm

2 stops19h 15m

$583

Washington, D.C.Lisbon

DCA - LIS

DCALIS

Washington, D.C. Reagan-National

Wed 5/6

11:00 am-4:00 pm

2 stops24h 00m

Lisbon Humberto Delgado

Sun 5/10

7:00 am-11:24 pm

2 stops21h 24m

$602

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 3/24

12:16 pm-10:30 am

2 stops18h 14m

Porto

Wed 4/1

5:00 am-10:08 pm

2 stops22h 08m

$616

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 3/31

12:16 pm-10:55 am

2 stops17h 39m

Porto

Wed 4/15

5:00 am-6:02 pm

2 stops18h 02m

$624

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sat 4/25

6:00 pm-9:45 am

1 stop10h 45m

Porto

Thu 5/14

6:00 am-10:42 pm

2 stops21h 42m

$664

Washington, D.C.Lisbon

DCA - LIS

DCALIS

Washington, D.C. Reagan-National

Wed 5/6

11:00 am-4:00 pm

2 stops24h 00m

Lisbon Humberto Delgado

Mon 5/11

7:00 am-11:24 pm

2 stops21h 24m

$672

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sun 7/26

12:05 pm-10:30 am

2 stops17h 25m

Porto

Fri 8/21

9:25 am-11:26 pm

2 stops19h 01m

$682

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 3/9

1:55 pm-10:30 am

2 stops16h 35m

Porto

Wed 3/18

11:15 am-11:44 pm

2 stops16h 29m

$692

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 3/9

8:10 pm-9:30 am

1 stop9h 20m

Porto

Thu 3/19

12:35 pm-9:35 pm

1 stop13h 00m

$693

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 3/2

4:10 pm-9:30 am

1 stop12h 20m

Porto

Tue 3/17

12:35 pm-9:35 pm

1 stop13h 00m

$693

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/17

Showing 1-10 of 60 results
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Best time to book a flight from Reagan-National to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Reagan-National with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Reagan-National Airport to Portugal

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

Currently, March is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Portugal (average of $606). Flying from Washington, D.C. Reagan-National Airport to Portugal in December is currently the most expensive (average of $1,301). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portugal. Reviews last updated February 17, 2026.
Get a feel of what it's like to fly with United Airlines and TAP AIR PORTUGAL from Washington, D.C. Reagan-National Airport to Portugal by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,308 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,308 reviews
United Airlines
7.4
Good
9,308 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
TAP AIR PORTUGAL
7.1
Good
2,143 reviews
United Airlines
7.4
Good
9,308 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. Reagan-National Airport to Portugal?

    For as low as $583, United Airlines can have you in Portugal from Washington, D.C. Reagan-National Airport in 9h 20m. There are 3520 mi between Washington, D.C. Reagan-National Airport and Portugal. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Washington, D.C. Reagan-National Airport to Portugal?

    The most popular route from Washington, D.C. Reagan-National Airport to Portugal is Washington, D.C. Reagan-National - Lisbon Humberto Delgado. You may also consider Washington, D.C. Reagan-National - Porto or Washington, D.C. Reagan-National - Ponta Delgada Nordela.

  • Can I find deals for flights from Reagan-National to Portugal that include hotel bookings?

    Yes. In addition to deals on Reagan-National to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Reagan-National to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Portugal.

  • Can I find deals for business class flights from Reagan-National to Portugal?

    Yes. Cheapflights offers flight deals from Reagan-National to Portugal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Portugal?

    Currently, March is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Portugal (average of $606). Flying from Washington, D.C. Reagan-National Airport to Portugal in December is currently the most expensive (average of $1,301). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Reagan-National to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Reagan-National to Portugal

Discover the top 2 airlines that operate flights from Reagan-National to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$520Average$1,045FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$617Average$1,024FlexibilityNo cancel feeOn-timeN/A

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