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$294+ 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 11/27. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — LIS
Dec 18 — Dec 251
Thu 12/18
Thu 12/25
1 adult, Economy
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Find 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 November 18, 2025.

This United Airlines deal was found by Cheapflights users on 11/17. 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.
Mon 12/14:10 pmDCA - OPO
2 stops38h 30mUnited Airlines
Fri 12/1212:30 pmOPO - DCA
2 stops30h 40mUnited Airlines
Deal found 11/17$499
This CheapOair deal was found by Cheapflights users on 11/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/111:05 amDCA - OPO
2 stops20h 45mMultiple Airlines
Fri 12/128:40 amOPO - DCA
2 stops18h 16mMultiple Airlines
Deal found 11/16$504
This CheapOair deal was found by Cheapflights users on 11/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/56:00 amDCA - OPO
2 stops25h 05mAir Canada
Wed 12/106:00 amOPO - DCA
2 stops42h 45mAir Canada
Deal found 11/17$534
This Delta deal was found by Cheapflights users on 11/18. 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.
Sat 12/611:13 amDCA - OPO
2 stops18h 17mDelta
Mon 12/156:30 amOPO - DCA
2 stops20h 42mDelta
Deal found 11/18$592
This Mytrip deal was found by Cheapflights users on 11/18. 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.
Wed 11/264:10 pmDCA - OPO
2 stops14h 50mMultiple Airlines
Tue 12/29:55 pmOPO - DCA
3 stops29h 01mMultiple Airlines
Deal found 11/18$597
This United Airlines deal was found by Cheapflights users on 11/18. 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.
Wed 11/266:00 pmDCA - OPO
1 stop10h 30mUnited Airlines
Tue 12/212:30 pmOPO - DCA
2 stops40h 29mUnited Airlines
Deal found 11/18$653
This KAYAK deal was found by Cheapflights users on 11/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/211:13 amDCA - LIS
2 stops23h 52mScandinavian Airlines
Sun 12/77:00 pmLIS - DCA
2 stops33h 58mScandinavian Airlines
Deal found 11/17$658
This Delta deal was found by Cheapflights users on 11/16. 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 11/2511:10 amDCA - OPO
2 stops18h 20mDelta
Tue 12/211:25 amOPO - DCA
2 stops36h 15mDelta
Deal found 11/16$666
This Mytrip deal was found by Cheapflights users on 11/17. 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.
Tue 12/211:05 amDCA - LIS
3 stops29h 50mMultiple Airlines
Tue 12/97:10 pmLIS - DCA
3 stops31h 46mMultiple Airlines
Deal found 11/17$684
This FlightHub deal was found by Cheapflights users on 11/17. 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.
Tue 12/211:13 amDCA - LIS
2 stops23h 52mScandinavian Airlines
Wed 12/104:55 pmLIS - DCA
2 stops35h 02mScandinavian Airlines
Deal found 11/17$690
This KAYAK deal was found by Cheapflights users on 11/17. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/411:13 amDCA - LIS
2 stops40h 42mScandinavian Airlines
Sun 12/77:00 pmLIS - DCA
2 stops33h 58mScandinavian Airlines
Deal found 11/17$708
This Scandinavian Airlines deal was found by Cheapflights users on 11/16. 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.
Tue 12/91:15 pmDCA - LIS
2 stops21h 50mScandinavian Airlines
Sun 12/147:00 pmLIS - DCA
2 stops32h 12mScandinavian Airlines
Deal found 11/16$711

Cheap 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 November 18, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$499
(United Airlines)

One-way from

$294
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$825
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.
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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. 6% potential increase in price ($60 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 18, 2025.
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

Mon 12/1

4:10 pm-11:40 am

2 stops38h 30m

Porto

Fri 12/12

12:30 pm-2:10 pm

2 stops30h 40m

$499

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sun 2/15

2:00 pm-11:40 am

2 stops16h 40m

Porto

Tue 3/24

12:35 pm-9:35 pm

1 stop13h 00m

$515

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 1/14

8:25 am-11:40 am

3 stops22h 15m

Porto

Mon 1/19

12:30 pm-7:32 pm

2 stops36h 02m

$522

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Thu 2/12

4:10 pm-12:05 pm

2 stops14h 55m

Porto

Wed 2/18

6:00 am-6:05 pm

2 stops41h 05m

$534

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Fri 12/5

6:00 am-12:05 pm

2 stops25h 05m

Porto

Wed 12/10

6:00 am-7:45 pm

2 stops42h 45m

$534

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Thu 1/8

12:10 pm-7:40 am

2 stops14h 30m

Porto

Wed 1/21

8:20 am-6:54 pm

2 stops15h 34m

$560

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Fri 2/13

1:30 pm-7:00 pm

2 stops24h 30m

Porto

Wed 2/18

8:20 am-6:52 pm

2 stops15h 32m

$579

Washington, D.C.Lisbon

DCA - LIS

DCALIS

Washington, D.C. Reagan-National

Sat 2/28

12:05 pm-5:10 pm

2 stops24h 05m

Lisbon Humberto Delgado

Thu 3/5

6:55 pm-10:43 pm

2 stops32h 48m

$696

Washington, D.C.Lisbon

DCA - LIS

DCALIS

Washington, D.C. Reagan-National

Fri 4/10

12:00 pm-3:45 pm

2 stops22h 45m

Lisbon Humberto Delgado

Sat 4/18

7:00 am-11:12 pm

2 stops21h 12m

$746

Washington, D.C.Faro

DCA - FAO

DCAFAO

Washington, D.C. Reagan-National

Tue 4/7

4:10 pm-3:05 pm

2 stops17h 55m

Faro

Tue 4/14

12:10 pm-3:24 pm

2 stops32h 14m

$752

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

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, May is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Portugal (average of $535). Flying from Washington, D.C. Reagan-National Airport to Portugal in June is currently the most expensive (average of $1,303). 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.

What is the cheapest time of day to fly from DCA to PT?

Find hourly flight availability from Reagan-National to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 18, 2025.

It’s typically best to fly out from Washington, D.C. Reagan-National Airport to Portugal in the morning. Doing so could potentially save you 33% on the flight price compared to flying at noon, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Reagan-National to Portugal. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Washington, D.C. Reagan-National Airport to Portugal flight should consider departing on Tuesday mornings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 18, 2025.
Get a feel of what it's like to fly with United Airlines, TAP AIR PORTUGAL, and Lufthansa 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
9,019 reviews

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,019 reviews
United Airlines
7.4
Good
9,019 reviews

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
TAP AIR PORTUGAL
7.1
Good
2,066 reviews
United Airlines
7.4
Good
9,019 reviews

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Lufthansa
6.8
Okay
7,576 reviews
United Airlines
7.4
Good
9,019 reviews

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Crew

8.1

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 $696, United Airlines can have you in Portugal from Washington, D.C. Reagan-National Airport in 24h 05m. There are 3562 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, May is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Portugal (average of $535). Flying from Washington, D.C. Reagan-National Airport to Portugal in June is currently the most expensive (average of $1,303). 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.

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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 3 airlines flying from Reagan-National to Portugal

Discover the top 3 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 November 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$520Average$1,247FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$561Average$948FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$968Average$968FlexibilityNo cancel feeOn-time76%

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