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 British Airways. According to our data, you can fly for as low as $520. Users have also found prices from $541 and $544 on Iberia and Finnair, 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 $344). 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 $542. For sooner than that we have options available in the next 3 days from $750.

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 $665. You can even find prices in September for less than $665, as users have found deals to Washington, D.C. Reagan-National Airport from as low as $495. 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 32%.

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.

$721+ Flights from Portugal to Washington, D.C. Reagan-National Airport - Compare & Save Big

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Cheap flight deals from Portugal to Reagan-National

Most accurate provider	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$543 (United Airlines)
One-way from	$503 (Air Europa)
Popular in	July
Cheapest in	September
Average price	$675

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. 17% potential increase in price ($137 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).

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Average for round-trip flights in May 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 May 1, 2025.

Sun 6/811:20 amOPO - DCA

1 stop27h 59mUnited Airlines

Sun 6/229:33 amDCA - OPO

1 stop16h 22mUnited Airlines

Deal found 4/29

$543

Sat 5/1011:40 amLIS - DCA

2 stops16h 20mDelta

Mon 5/2612:00 pmDCA - LIS

1 stop17h 45mDelta

Deal found 4/30

$543

Sat 5/106:35 amLIS - DCA

2 stops21h 01mAmerican Airlines

Mon 5/266:33 amDCA - LIS

1 stop21h 32mAmerican Airlines

Deal found 4/30

$554

Sat 5/1012:45 pmLIS - DCA

1 stop11h 59mVirgin Atlantic

Mon 5/266:55 pmDCA - LIS

1 stop10h 50mVirgin Atlantic

Deal found 4/30

$557

Wed 10/86:00 amOPO - DCA

2 stops20h 51mAir Canada

Tue 10/2111:00 amDCA - OPO

2 stops19h 30mAir Canada

Deal found 4/30

$560

Sun 6/88:15 amOPO - DCA

2 stops28h 35mBritish Airways

Sun 6/226:59 pmDCA - OPO

2 stops20h 21mBritish Airways

Deal found 4/29

$564

Sat 5/1012:55 pmLIS - DCA

1 stop14h 33mUnited Airlines

Mon 5/269:40 amDCA - LIS

1 stop17h 40mUnited Airlines

Deal found 4/30

$582

Sat 11/2911:00 amLIS - DCA

1 stop15h 00mAir Canada

Mon 12/86:50 pmDCA - LIS

1 stop9h 30mAir Canada

Deal found 4/30

$627

Tue 7/2910:00 amLIS - DCA

1 stop13h 14mKLM

Wed 9/245:00 pmDCA - LIS

1 stop12h 45mKLM

Deal found 4/30

$631

Wed 8/209:20 amOPO - DCA

2 stops19h 10mDelta

Wed 10/15:00 pmDCA - OPO

2 stops17h 30mDelta

Deal found 4/30

$643

Wed 8/206:00 amOPO - DCA

2 stops18h 03mMultiple Airlines

Wed 10/19:40 amDCA - OPO

2 stops20h 45mMultiple Airlines

Deal found 4/29

$669

Sun 6/88:15 amOPO - DCA

2 stops19h 52mAmerican Airlines

Sat 6/212:54 pmDCA - OPO

2 stops15h 46mAmerican Airlines

Deal found 4/29

$700

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 May 1, 2025.

Sun 6/811:20 amOPO - DCA

1 stop27h 59mUnited Airlines

Sun 6/229:33 amDCA - OPO

1 stop16h 22mUnited Airlines

Deal found 4/29

$543

Sat 5/1011:40 amLIS - DCA

2 stops16h 20mDelta

Mon 5/2612:00 pmDCA - LIS

1 stop17h 45mDelta

Deal found 4/30

$543

Sat 5/106:35 amLIS - DCA

2 stops21h 01mAmerican Airlines

Mon 5/266:33 amDCA - LIS

1 stop21h 32mAmerican Airlines

Deal found 4/30

$554

Sat 5/1010:00 amLIS - DCA

1 stop13h 07mVirgin Atlantic

Mon 5/266:05 amDCA - LIS

1 stop20h 55mVirgin Atlantic

Deal found 4/30

$557

Wed 10/86:00 amOPO - DCA

2 stops20h 51mAir Canada

Tue 10/2111:00 amDCA - OPO

2 stops19h 30mAir Canada

Deal found 4/30

$560

Sun 6/88:15 amOPO - DCA

2 stops28h 35mBritish Airways

Sun 6/226:59 pmDCA - OPO

2 stops20h 21mBritish Airways

Deal found 4/29

$564

Tue 7/2910:00 amLIS - DCA

1 stop13h 14mKLM

Wed 9/245:00 pmDCA - LIS

1 stop12h 45mKLM

Deal found 4/30

$631

Wed 8/206:00 amOPO - DCA

2 stops18h 03mMultiple Airlines

Wed 10/19:40 amDCA - OPO

2 stops20h 45mMultiple Airlines

Deal found 4/29

$669

Wed 10/86:10 pmOPO - DCA

1 stop31h 41mTAP AIR PORTUGAL

Tue 10/211:45 pmDCA - OPO

2 stops19h 20mTAP AIR PORTUGAL

Deal found 4/29

$1,103

Sat 5/1012:55 pmLIS - DCA

1 stop14h 33mUnited Airlines

Mon 5/269:40 amDCA - LIS

1 stop17h 40mUnited Airlines

Deal found 4/30

$582

Tue 7/292:25 pmLIS - DCA

2 stops37h 34mLOT

Fri 9/266:30 amDCA - LIS

2 stops25h 55mLOT

Deal found 4/30

$1,244

Wed 8/209:20 amOPO - DCA

2 stops19h 10mDelta

Wed 10/15:00 pmDCA - OPO

2 stops17h 30mDelta

Deal found 4/30

$643

Last-minute flights from Portugal to Reagan-National
Discover last-minute flight deals from Portugal to Reagan-National. Data last updated May 1, 2025 and is based on user searches.

Mon 5/512:20 pmOPO - DCA

2 stops15h 16mAmerican Airlines

Fri 5/95:30 pmDCA - OPO

2 stops13h 10mAmerican Airlines

Deal found 4/29

$786

Mon 5/51:30 pmOPO - DCA

2 stops25h 49mMultiple Airlines

Fri 5/98:40 pmDCA - OPO

1 stop10h 05mMultiple Airlines

Deal found 4/29

$1,026

Tue 5/612:20 pmOPO - DCA

2 stops15h 16mIberia

Fri 5/912:35 pmDCA - OPO

2 stops14h 00mIberia

Deal found 4/29

$831

Tue 5/612:35 pmOPO - DCA

1 stop12h 06mUnited Airlines

Fri 5/911:00 amDCA - OPO

2 stops19h 15mUnited Airlines

Deal found 4/29

$1,009

Wed 5/712:30 pmLIS - DCA

2 stops15h 06mBritish Airways

Wed 5/143:54 pmDCA - LIS

1 stop12h 11mBritish Airways

Deal found 4/30

$872

Sat 5/1011:40 amLIS - DCA

2 stops16h 20mDelta

Mon 5/2612:00 pmDCA - LIS

1 stop17h 45mDelta

Deal found 4/30

$543

Sat 5/106:35 amLIS - DCA

2 stops21h 01mAmerican Airlines

Mon 5/266:33 amDCA - LIS

1 stop21h 32mAmerican Airlines

Deal found 4/30

$554

Sat 5/1012:45 pmLIS - DCA

1 stop11h 59mVirgin Atlantic

Mon 5/266:55 pmDCA - LIS

1 stop10h 50mVirgin Atlantic

Deal found 4/30

$557

Sat 5/1012:55 pmLIS - DCA

1 stop14h 33mUnited Airlines

Mon 5/269:40 amDCA - LIS

1 stop17h 40mUnited Airlines

Deal found 4/30

$582

Sat 5/1011:25 amLIS - DCA

2 stops13h 18mAir Canada

Mon 5/2612:55 pmDCA - LIS

2 stops15h 25mAir Canada

Deal found 4/30

$910

Sat 5/1012:55 pmLIS - DCA

2 stops26h 24mMultiple Airlines

Mon 5/266:59 amDCA - LIS

3 stops35h 21mMultiple Airlines

Deal found 4/30

$915

Sat 5/108:15 pmLIS - DCA

2 stops26h 52mITA Airways

Mon 5/265:00 pmDCA - LIS

2 stops17h 45mITA Airways

Deal found 4/30

$2,121

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 May 1, 2025.

Mon 5/58:05 pmLIS - DCA

2 stops31h 40mMultiple Airlines

Deal found 4/30

$503

Mon 5/1211:05 amLIS - DCA

1 stop13h 54mBritish Airways

Deal found 4/30

$520

Sat 9/2010:40 amOPO - DCA

2 stops17h 20mMultiple Airlines

Deal found 4/30

$536

Tue 9/168:40 pmOPO - DCA

2 stops31h 20mBritish Airways

Deal found 4/29

$540

Wed 6/412:20 pmOPO - DCA

2 stops15h 16mIberia

Deal found 4/29

$541

Mon 9/296:35 amLIS - DCA

2 stops21h 25mFinnair

Deal found 4/30

$544

Tue 8/266:35 amLIS - DCA

2 stops17h 00mAmerican Airlines

Deal found 4/29

$554

Thu 5/2912:20 pmOPO - DCA

2 stops32h 35mAmerican Airlines

Deal found 4/29

$556

Sun 9/75:40 amLIS - DCA

2 stops17h 32mDelta

Deal found 4/29

$589

Sat 9/2010:00 amLIS - DCA

1 stop13h 05mKLM

Deal found 4/30

$592

Mon 8/256:30 amOPO - DCA

2 stops15h 56mKLM

Deal found 4/29

$611

Sat 5/316:35 amLIS - DCA

2 stops17h 16mIberia

Deal found 4/30

$616

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

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 6/8

11:20 am-10:19 am

1 stop27h 59m

Washington, D.C. Reagan-National

Sun 6/22

9:33 am-6:55 am

1 stop16h 22m

$543

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Sat 5/10

11:40 am-11:00 pm

2 stops16h 20m

Washington, D.C. Reagan-National

Mon 5/26

12:00 pm-10:45 am

1 stop17h 45m

$543

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Sat 5/10

6:35 am-10:36 pm

2 stops21h 01m

Washington, D.C. Reagan-National

Mon 5/26

6:33 am-9:05 am

1 stop21h 32m

$554

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Sat 5/10

12:45 pm-7:44 pm

1 stop11h 59m

Washington, D.C. Reagan-National

Mon 5/26

6:55 pm-10:45 am

1 stop10h 50m

$557

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 10/8

6:00 am-9:51 pm

2 stops20h 51m

Washington, D.C. Reagan-National

Tue 10/21

11:00 am-11:30 am

2 stops19h 30m

$560

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 6/8

8:15 am-7:50 am

2 stops28h 35m

Washington, D.C. Reagan-National

Sun 6/22

6:59 pm-8:20 pm

2 stops20h 21m

$564

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Sat 5/10

12:55 pm-10:28 pm

1 stop14h 33m

Washington, D.C. Reagan-National

Mon 5/26

9:40 am-8:20 am

1 stop17h 40m

$582

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Tue 7/29

10:00 am-6:14 pm

1 stop13h 14m

Washington, D.C. Reagan-National

Wed 9/24

5:00 pm-10:45 am

1 stop12h 45m

$631

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 8/20

9:20 am-11:30 pm

2 stops19h 10m

Washington, D.C. Reagan-National

Wed 10/1

5:00 pm-3:30 pm

2 stops17h 30m

$643

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Sun 5/18

12:55 pm-10:28 pm

1 stop14h 33m

Washington, D.C. Reagan-National

Thu 8/7

12:55 pm-9:20 am

2 stops15h 25m

$665

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

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

7,934 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

7,934 reviews

Delta

8.0

Very good

7,934 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

1,334 reviews

Delta

8.0

Very good

7,934 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

1,069 reviews

Delta

8.0

Very good

7,934 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

1,275 reviews

Delta

8.0

Very good

7,934 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

1,446 reviews

Delta

8.0

Very good

7,934 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 British Airways. According to our data, you can fly for as low as $520. Users have also found prices from $541 and $544 on Iberia and Finnair, 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 $344). 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

Alexandria

Arlington

Woodbridge

Tysons

Fairfax

Springfield

Rockville

Fredericksburg

Silver Spring

Gaithersburg

Linthicum Heights

Falls Church

Laurel

Easton

Towson

Herndon

Bowie

National Harbor

Oxon Hill

Reston

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$503+ 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 5/5. 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 May 1, 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 May 1, 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 May 1, 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?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portugal to Reagan-National

See prices for flight routes from nearby airports that may be better suited for you.

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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 May 1, 2025.