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$338+ 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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — LIS
Nov 1 — Nov 81
Sat 11/1
Sat 11/8
1 adult, Economy
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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 October 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$509
(United Airlines)

One-way from

$338
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$797
Provider with most accurate pricing for Washington, D.C. (WAS)-Lisbon Humberto Delgado flight deals.
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From Washington, D.C. Reagan-National to Portugal
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One-way flight from Washington, D.C. Reagan-National to Portugal
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Highest demand for flights based on searches. 3% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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 October 2, 2025.

This United Airlines deal was found by Cheapflights users on 10/2. 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 12/311:05 amDCA - OPO
2 stops23h 20mUnited Airlines
Mon 12/86:00 amOPO - DCA
2 stops57h 26mUnited Airlines
Deal found 10/2$509
This Trip.com deal was found by Cheapflights users on 9/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:20 pmDCA - OPO
1 stop10h 10mUnited Airlines
Fri 11/2112:35 pmOPO - DCA
1 stop12h 00mUnited Airlines
Deal found 9/30$528
This Flysmarter deal was found by Cheapflights users on 9/30. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/144:10 pmDCA - OPO
2 stops14h 55mAir Canada
Fri 11/216:00 amOPO - DCA
2 stops18h 45mAir Canada
Deal found 9/30$534
This Air Canada deal was found by Cheapflights users on 10/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:00 amDCA - OPO
2 stops24h 10mAir Canada
Thu 11/206:00 amOPO - DCA
2 stops18h 45mAir Canada
Deal found 10/1$535
This United Airlines deal was found by Cheapflights users on 9/30. 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 10/278:05 pmDCA - OPO
1 stop9h 25mUnited Airlines
Tue 11/412:35 pmOPO - DCA
1 stop12h 00mUnited Airlines
Deal found 9/30$539
This Delta deal was found by Cheapflights users on 9/30. 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.
Thu 10/2312:15 pmDCA - OPO
2 stops15h 10mDelta
Tue 11/411:15 amOPO - DCA
2 stops16h 47mDelta
Deal found 9/30$542
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Fri 11/147:00 pmDCA - OPO
1 stop9h 30mUnited Airlines
Wed 11/1912:35 pmOPO - DCA
1 stop12h 00mUnited Airlines
Deal found 10/1$544
This Delta deal was found by Cheapflights users on 9/30. 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.
Wed 10/2212:15 pmDCA - OPO
2 stops17h 25mDelta
Sat 11/16:00 amOPO - DCA
2 stops16h 00mDelta
Deal found 9/30$548
This KLM deal was found by Cheapflights users on 10/2. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/122:00 pmDCA - OPO
2 stops15h 30mMultiple Airlines
Sun 11/1611:25 amOPO - DCA
2 stops16h 31mMultiple Airlines
Deal found 10/2$549
This KLM deal was found by Cheapflights users on 10/2. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:35 pmDCA - OPO
2 stops14h 50mKLM
Sun 11/2311:25 amOPO - DCA
2 stops16h 31mKLM
Deal found 10/2$554
This United Airlines deal was found by Cheapflights users on 9/30. 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.
Sun 11/25:00 pmDCA - OPO
1 stop11h 30mUnited Airlines
Tue 11/116:00 amOPO - DCA
2 stops20h 34mUnited Airlines
Deal found 9/30$569
This Mytrip deal was found by Cheapflights users on 9/29. 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 10/2911:05 amDCA - LIS
2 stops28h 30mMultiple Airlines
Wed 11/56:30 amLIS - DCA
2 stops20h 26mMultiple Airlines
Deal found 9/29$585

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 October 2, 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

Wed 12/3

11:05 am-3:25 pm

2 stops23h 20m

Porto

Mon 12/8

6:00 am-10:26 am

2 stops57h 26m

$509

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Fri 11/14

6:20 pm-9:30 am

1 stop10h 10m

Porto

Fri 11/21

6:00 am-8:55 am

2 stops31h 55m

$530

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Thu 10/23

12:15 pm-8:25 am

2 stops15h 10m

Porto

Tue 11/4

6:05 am-6:59 pm

2 stops17h 54m

$542

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Fri 11/14

7:00 pm-9:30 am

1 stop9h 30m

Porto

Wed 11/19

12:35 pm-7:35 pm

1 stop12h 00m

$544

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Thu 2/12

7:30 pm-3:25 pm

2 stops14h 55m

Porto

Wed 2/18

6:00 am-5:27 pm

2 stops16h 27m

$548

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 10/22

12:15 pm-10:40 am

2 stops17h 25m

Porto

Sat 11/1

6:00 am-6:00 pm

2 stops16h 00m

$548

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sun 11/16

7:35 pm-3:25 pm

2 stops14h 50m

Porto

Sun 11/23

11:25 am-10:56 pm

2 stops16h 31m

$554

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 3/17

8:00 pm-9:30 am

1 stop9h 30m

Porto

Fri 3/27

6:00 am-10:16 pm

2 stops20h 16m

$570

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 10/21

5:00 pm-3:30 pm

2 stops17h 30m

Porto

Fri 10/31

6:30 am-11:52 pm

2 stops21h 22m

$572

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 10/21

5:00 pm-3:30 pm

2 stops17h 30m

Porto

Wed 10/29

11:15 am-11:52 pm

2 stops16h 37m

$572

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/1

Showing 1-10 of 57 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, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Portugal (average of $612). Flying from Washington, D.C. Reagan-National Airport to Portugal in June is currently the most expensive (average of $1,126). 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 October 2, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Reagan-National Airport to Portugal as you normally would.

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 October 2, 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
8,933 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,933 reviews
United Airlines
7.4
Good
8,933 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
TAP AIR PORTUGAL
7.1
Good
2,000 reviews
United Airlines
7.4
Good
8,933 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
Lufthansa
6.8
Okay
7,446 reviews
United Airlines
7.4
Good
8,933 reviews

Crew

8.1

Boarding

7.7

Food

6.6

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

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 $542, United Airlines can have you in Portugal from Washington, D.C. Reagan-National Airport in 15h 10m. 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 cheapest airlines to fly from Washington, D.C. Reagan-National Airport to Portugal one-way?

    The cheapest airlines for a one-way flight from Washington, D.C. Reagan-National Airport to Portugal are Scandinavian Airlines ($369), United Airlines ($399), and TAP AIR PORTUGAL ($463).

  • 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 - Funchal Madeira.

  • 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, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Portugal (average of $612). Flying from Washington, D.C. Reagan-National Airport to Portugal in June is currently the most expensive (average of $1,126). 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 October 2, 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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