What are the cheapest airlines to fly from Portugal to Washington, D.C. Reagan-National Airport one-way?

For one-way options, check prices for Finnair. According to our data, you can fly for as low as $510. Users have also found prices from $512 and $530 on British Airways and American Airlines, respectively.

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

Currently, February is the cheapest month in which you can book a flight from Portugal to Washington, D.C. Reagan-National Airport (average of $278). Flying from Portugal to Washington, D.C. Reagan-National Airport in June is currently the most expensive (average of $345). 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.

How far in advance should I book a flight from Portugal to Washington, D.C. Reagan-National Airport?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 49 days in advance, which can save you up to 74% on flights from Portugal to Washington, D.C. Reagan-National Airport compared to booking the week you need them. Waiting 49 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $549. For sooner than that we have options available in the next 3 days from $751.

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

The best pricing can be found in the month of September. Prices to Washington, D.C. Reagan-National Airport from Portugal average $683. You can even find prices in September for less than $683, as users have found deals to Washington, D.C. Reagan-National Airport from as low as $498. The month of July appears to be one of the more expensive times to travel to Washington, D.C. Reagan-National Airport from Portugal. Flying in the targeted month can save you up to 29%.

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

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

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

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

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

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

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

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

$1,025+ Flights from Portugal to Washington, D.C. Reagan-National Airport

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Cheap flight deals from Portugal to Reagan-National

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$514 (Delta)
One-way from	$436 (Mytrip)
Popular in	July
Cheapest in	September
Average price	$720

Provider with most accurate pricing for Lisbon Humberto Delgado-Washington, D.C. (WAS) flight deals.

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Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Washington, D.C. (WAS) flights.

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From Portugal to Washington, D.C. Reagan-National

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One-way flight from Portugal to Washington, D.C. Reagan-National

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Highest demand for flights based on searches. 16% potential increase in price ($134 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).

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Average for round-trip flights in March 2025

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Find flight deals from Portugal to Reagan-National

Cheapest flights from Portugal to Reagan-National
Explore the most affordable flight options available from Portugal to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Wed 5/1411:40 amLIS - DCA

2 stops16h 05mDelta

Mon 5/265:00 pmDCA - LIS

2 stops16h 50mDelta

Deal found 3/27

$514

Fri 5/912:45 pmLIS - DCA

1 stop15h 59mKLM

Sun 5/2512:45 pmDCA - LIS

1 stop17h 00mKLM

Deal found 3/27

$527

Fri 5/28:25 amLIS - DCA

2 stops16h 39mAmerican Airlines

Thu 5/291:15 pmDCA - LIS

2 stops13h 30mAmerican Airlines

Deal found 3/27

$530

Mon 5/1912:45 pmLIS - DCA

2 stops15h 00mVirgin Atlantic

Tue 6/311:00 amDCA - LIS

2 stops18h 45mVirgin Atlantic

Deal found 3/26

$565

Thu 5/19:25 amOPO - DCA

2 stops18h 20mDelta

Sat 5/176:32 pmDCA - OPO

2 stops18h 08mDelta

Deal found 3/27

$597

Tue 6/176:35 amLIS - DCA

2 stops21h 32mMultiple Airlines

Sat 6/2110:00 pmDCA - LIS

1 stop30h 05mMultiple Airlines

Deal found 3/28

$656

Sun 5/186:50 pmLIS - DCA

2 stops28h 17mAir France

Thu 8/75:00 pmDCA - LIS

2 stops16h 50mAir France

Deal found 3/28

$657

Fri 9/1910:25 amLIS - DCA

1 stop11h 58mUnited Airlines

Wed 9/2411:00 amDCA - LIS

1 stop19h 10mUnited Airlines

Deal found 3/27

$679

Sun 5/118:15 amOPO - DCA

2 stops15h 52mAmerican Airlines

Sun 5/1810:55 amDCA - OPO

2 stops15h 40mAmerican Airlines

Deal found 3/26

$688

Fri 5/911:25 amLIS - DCA

1 stop15h 28mAir Canada

Fri 5/2312:55 pmDCA - LIS

2 stops41h 35mAir Canada

Deal found 3/27

$693

Tue 6/1711:05 amLIS - DCA

1 stop31h 50mBritish Airways

Sat 6/2110:00 pmDCA - LIS

1 stop30h 05mBritish Airways

Deal found 3/28

$712

Sat 4/1212:35 pmOPO - DCA

1 stop12h 07mUnited Airlines

Sat 4/191:19 pmDCA - OPO

2 stops21h 26mUnited Airlines

Deal found 3/27

$934

Best flights from Portugal to Reagan-National
Discover carefully curated flight deals from Portugal to Reagan-National that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 28, 2025.

Wed 5/1411:40 amLIS - DCA

2 stops16h 05mDelta

Mon 5/265:00 pmDCA - LIS

2 stops16h 50mDelta

Deal found 3/27

$514

Fri 5/912:45 pmLIS - DCA

1 stop15h 59mKLM

Sun 5/2512:45 pmDCA - LIS

1 stop17h 00mKLM

Deal found 3/27

$527

Fri 5/28:25 amLIS - DCA

2 stops16h 39mAmerican Airlines

Thu 5/291:15 pmDCA - LIS

2 stops13h 30mAmerican Airlines

Deal found 3/27

$530

Mon 5/1912:45 pmLIS - DCA

2 stops15h 00mVirgin Atlantic

Tue 6/311:00 amDCA - LIS

2 stops18h 45mVirgin Atlantic

Deal found 3/26

$565

Fri 5/911:25 amLIS - DCA

1 stop27h 54mUnited Airlines

Sun 5/259:33 amDCA - LIS

1 stop17h 47mUnited Airlines

Deal found 3/27

$578

Tue 6/176:35 amLIS - DCA

2 stops21h 32mMultiple Airlines

Sat 6/2110:00 pmDCA - LIS

1 stop30h 05mMultiple Airlines

Deal found 3/28

$656

Sun 5/186:50 pmLIS - DCA

2 stops28h 17mAir France

Thu 8/75:00 pmDCA - LIS

2 stops16h 50mAir France

Deal found 3/28

$657

Fri 5/911:25 amLIS - DCA

1 stop15h 28mAir Canada

Fri 5/2312:55 pmDCA - LIS

2 stops41h 35mAir Canada

Deal found 3/27

$693

Tue 6/1711:05 amLIS - DCA

1 stop31h 50mBritish Airways

Sat 6/2110:00 pmDCA - LIS

1 stop30h 05mBritish Airways

Deal found 3/28

$712

Thu 5/19:25 amOPO - DCA

2 stops18h 20mDelta

Sat 5/176:32 pmDCA - OPO

2 stops18h 08mDelta

Deal found 3/27

$597

Thu 5/16:05 pmOPO - DCA

1 stop32h 37mTAP AIR PORTUGAL

Sat 5/174:15 pmDCA - OPO

1 stop13h 40mTAP AIR PORTUGAL

Deal found 3/27

$1,299

Thu 8/78:15 pmLIS - DCA

2 stops26h 57mITA Airways

Sat 8/1611:00 amDCA - LIS

2 stops21h 20mITA Airways

Deal found 3/27

$1,303

Last-minute flights from Portugal to Reagan-National
Discover last-minute flight deals from Portugal to Reagan-National. Data last updated March 28, 2025 and is based on user searches.

Thu 3/276:00 amOPO - DCA

2 stops20h 37mAir Canada

Thu 4/34:10 pmDCA - OPO

2 stops14h 55mAir Canada

Deal found 3/26

$2,323

Sat 3/2910:30 amLIS - DCA

1 stop24h 25mAmerican Airlines

Mon 4/146:30 amDCA - LIS

1 stop21h 35mAmerican Airlines

Deal found 3/26

$851

Thu 4/312:45 pmLIS - DCA

1 stop12h 11mDelta

Thu 4/178:45 amDCA - LIS

1 stop18h 15mDelta

Deal found 3/27

$652

Thu 4/37:40 amLIS - DCA

2 stops20h 02mMultiple Airlines

Thu 4/171:55 pmDCA - LIS

2 stops15h 50mMultiple Airlines

Deal found 3/27

$1,840

Thu 4/38:50 amLIS - DCA

2 stops18h 52mITA Airways

Thu 4/174:31 pmDCA - LIS

2 stops18h 14mITA Airways

Deal found 3/27

$2,295

Fri 4/412:45 pmLIS - DCA

2 stops15h 25mVirgin Atlantic

Thu 4/176:25 amDCA - LIS

1 stop20h 35mVirgin Atlantic

Deal found 3/28

$578

Sat 4/126:40 amOPO - DCA

2 stops21h 02mDelta

Sat 4/196:15 pmDCA - OPO

2 stops16h 15mDelta

Deal found 3/27

$871

Sat 4/1212:35 pmOPO - DCA

1 stop12h 07mUnited Airlines

Sat 4/191:19 pmDCA - OPO

2 stops21h 26mUnited Airlines

Deal found 3/27

$934

Tue 4/155:35 pmLIS - DCA

1 stop19h 50mTAP AIR PORTUGAL

Thu 4/2411:39 amDCA - LIS

1 stop17h 11mTAP AIR PORTUGAL

Deal found 3/27

$7,090

Tue 4/1511:05 amLIS - DCA

1 stop13h 54mBritish Airways

Fri 4/183:54 pmDCA - LIS

1 stop12h 11mBritish Airways

Deal found 3/27

$7,404

Wed 4/168:15 amOPO - DCA

2 stops15h 44mAmerican Airlines

Wed 4/3011:40 amDCA - OPO

2 stops14h 55mAmerican Airlines

Deal found 3/27

$848

Sun 4/2712:50 pmLIS - DCA

1 stop12h 03mAir Canada

Thu 5/84:35 pmDCA - LIS

1 stop11h 45mAir Canada

Deal found 3/28

$3,474

One-way flights from Portugal to Reagan-National
Search for one-way flight options from Portugal to Reagan-National. Find affordable one-way fares based on user searches. Data last updated March 28, 2025.

Sun 6/110:20 pmLIS - DCA

2 stops26h 33mMultiple Airlines

Deal found 3/27

$436

Thu 5/2911:35 amOPO - DCA

2 stops27h 40mMultiple Airlines

Deal found 3/27

$471

Tue 5/137:15 amLIS - DCA

2 stops20h 21mFinnair

Deal found 3/27

$510

Sat 5/2410:40 amOPO - DCA

2 stops16h 56mBritish Airways

Deal found 3/27

$512

Thu 5/298:25 amLIS - DCA

2 stops15h 42mBritish Airways

Deal found 3/28

$523

Wed 5/1411:05 amLIS - DCA

1 stop13h 54mAmerican Airlines

Deal found 3/27

$530

Sun 6/18:45 pmLIS - DCA

2 stops27h 06mIberia

Deal found 3/27

$538

Mon 6/212:45 pmLIS - DCA

1 stop15h 59mDelta

Deal found 3/27

$573

Wed 4/3012:45 pmLIS - DCA

1 stop12h 06mVirgin Atlantic

Deal found 3/27

$645

Thu 5/2911:45 amLIS - DCA

1 stop13h 15mTAP AIR PORTUGAL

Deal found 3/28

$705

Sun 6/1511:20 amOPO - DCA

1 stop27h 59mUnited Airlines

Deal found 3/27

$720

Tue 4/1511:25 amLIS - DCA

1 stop14h 43mUnited Airlines

Deal found 3/27

$731

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portugal to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Wed 5/14

11:40 am-10:45 pm

2 stops16h 05m

Washington, D.C. Reagan-National

Mon 5/26

5:00 pm-2:50 pm

2 stops16h 50m

$514

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Fri 5/9

12:45 pm-11:44 pm

1 stop15h 59m

Washington, D.C. Reagan-National

Sun 5/25

12:45 pm-10:45 am

1 stop17h 00m

$527

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Fri 5/2

8:25 am-8:04 pm

2 stops16h 39m

Washington, D.C. Reagan-National

Thu 5/29

1:15 pm-7:45 am

2 stops13h 30m

$530

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Mon 5/19

12:45 pm-10:45 pm

2 stops15h 00m

Washington, D.C. Reagan-National

Tue 6/3

11:00 am-10:45 am

2 stops18h 45m

$565

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Fri 5/9

11:25 am-10:19 am

1 stop27h 54m

Washington, D.C. Reagan-National

Sun 5/25

9:33 am-8:20 am

1 stop17h 47m

$578

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 5/1

9:25 am-10:45 pm

2 stops18h 20m

Washington, D.C. Reagan-National

Sat 5/17

6:32 pm-5:40 pm

2 stops18h 08m

$597

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Tue 6/17

6:35 am-11:07 pm

2 stops21h 32m

Washington, D.C. Reagan-National

Sat 6/21

10:00 pm-9:05 am

1 stop30h 05m

$656

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Sun 5/18

6:50 pm-6:07 pm

2 stops28h 17m

Washington, D.C. Reagan-National

Thu 8/7

5:00 pm-2:50 pm

2 stops16h 50m

$657

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 5/11

8:15 am-7:07 pm

2 stops15h 52m

Washington, D.C. Reagan-National

Sun 5/18

10:55 am-7:35 am

2 stops15h 40m

$688

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Fri 5/9

11:25 am-9:53 pm

1 stop15h 28m

Washington, D.C. Reagan-National

Fri 5/23

12:55 pm-11:30 am

2 stops41h 35m

$693

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 38 results

Best time to book a flight from Portugal to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Portugal 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 Portugal to Washington, D.C. Reagan-National Airport

Rainfall in Reagan-National by month

In terms of precipitation, rainfall in Washington, D.C. Reagan-National Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Reagan-National Airport when rainfall is around 2.6 in.

Temperature in Reagan-National by month

If weather is an important factor for your trip to Washington, D.C. Reagan-National Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Reagan-National

Peruse reviews from past customers who have flown with Delta, KLM and LOT from Portugal to Washington, D.C. to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,896 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very good

7,896 reviews

Delta

8.0

Very good

7,896 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,321 reviews

Delta

8.0

Very good

7,896 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

LOT

7.6

Good

1,063 reviews

Delta

8.0

Very good

7,896 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,267 reviews

Delta

8.0

Very good

7,896 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France

7.4

Good

1,424 reviews

Delta

8.0

Very good

7,896 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

What are the cheapest airlines to fly from Portugal to Washington, D.C. Reagan-National Airport one-way?
For one-way options, check prices for Finnair. According to our data, you can fly for as low as $510. Users have also found prices from $512 and $530 on British Airways and American Airlines, respectively.
Can I find deals for flights from Portugal to Reagan-National that include hotel bookings?
Yes. In addition to deals on Portugal to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portugal to Reagan-National?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portugal to Reagan-National.
Can I find deals for business class flights from Portugal to Reagan-National?
Yes. Cheapflights offers flight deals from Portugal to Reagan-National 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 Portugal to Washington, D.C. Reagan-National Airport?
Currently, February is the cheapest month in which you can book a flight from Portugal to Washington, D.C. Reagan-National Airport (average of $278). Flying from Portugal to Washington, D.C. Reagan-National Airport in June is currently the most expensive (average of $345). 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

Arlington

Alexandria

Fairfax

Tysons

Springfield

Rockville

Woodbridge

Gaithersburg

Fredericksburg

Linthicum Heights

Silver Spring

Falls Church

Laurel

Easton

Herndon

Bowie

Gettysburg

National Harbor

Oxon Hill

Reston

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$436+ Cheap flights from Portugal to Reagan-National (DCA)

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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portugal to Reagan-National with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Portugal to Reagan-National

Keep the following information in mind while searching for Portugal to Reagan-National flight deals. Data was last updated March 28, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portugal to Reagan-National

Cheapest flights from Portugal to Reagan-NationalExplore the most affordable flight options available from Portugal to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Explore the most affordable flight options available from Portugal to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portugal to Washington, D.C. Reagan-National Airport that are best for you.

Best time to book a flight from Portugal to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Portugal with our price prediction graph.

Cheapflights Insights

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

Rainfall in Reagan-National by month

Plan your trip to Reagan-National by taking into account the average rainfall totals by month.

Temperature in Reagan-National by month

Plan your trip to Reagan-National by taking into account the average temperature totals by month.

Reviews of airlines servicing Reagan-National

Peruse reviews from past customers who have flown with Delta, KLM and LOT from Portugal to Washington, D.C. to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What are the cheapest airlines to fly from Portugal to Washington, D.C. Reagan-National Airport one-way?

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

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

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

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

Traveling to a place near Portugal?

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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portugal to Reagan-National

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Cheapest flights from Portugal to Reagan-National
Explore the most affordable flight options available from Portugal to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.