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 $548. Users have also found prices from $549 and $550 on American Airlines and Iberia, 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 $336). 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 71% 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 $551. 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 $668. You can even find prices in September for less than $668, as users have found deals to Washington, D.C. Reagan-National Airport from as low as $490. 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.

$636+ Flights from Portugal to Washington, D.C. Reagan-National Airport

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Cheap flight deals from Portugal to Reagan-National

Round-trip from	$494 (Delta)
One-way from	$454 (Mytrip)
Popular in	July
Cheapest in	September
Average price	$735

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

Search Deals

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

Search Deals

Highest demand for flights based on searches. 16% potential increase in price ($132 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).

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Average for round-trip flights in June 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 June 18, 2025.

Thu 9/116:30 amOPO - DCA

2 stops20h 49mDelta

Thu 9/2511:00 amDCA - OPO

2 stops16h 25mDelta

Deal found 6/18

$494

Sat 12/610:30 amLIS - DCA

1 stop11h 19mMultiple Airlines

Sat 12/1311:50 amDCA - LIS

1 stop16h 15mMultiple Airlines

Deal found 6/17

$498

Tue 7/2211:05 amLIS - DCA

2 stops24h 44mAmerican Airlines

Tue 9/22:59 pmDCA - LIS

2 stops19h 31mAmerican Airlines

Deal found 6/18

$512

Sat 12/610:30 amLIS - DCA

1 stop11h 19mBritish Airways

Sat 12/134:45 pmDCA - LIS

2 stops14h 25mBritish Airways

Deal found 6/18

$520

Mon 10/65:00 amLIS - DCA

2 stops19h 11mDelta

Thu 10/1612:00 pmDCA - LIS

1 stop17h 45mDelta

Deal found 6/18

$556

Mon 10/612:45 pmLIS - DCA

1 stop11h 26mKLM

Thu 10/163:30 pmDCA - LIS

1 stop14h 15mKLM

Deal found 6/18

$567

Mon 10/612:45 pmLIS - DCA

2 stops14h 34mVirgin Atlantic

Thu 10/1611:00 amDCA - LIS

2 stops18h 45mVirgin Atlantic

Deal found 6/18

$572

Thu 9/1112:10 pmOPO - DCA

1 stop32h 41mUnited Airlines

Thu 9/258:40 pmDCA - OPO

2 stops33h 35mUnited Airlines

Deal found 6/18

$582

Tue 7/2212:30 pmLIS - DCA

2 stops15h 41mIberia

Thu 9/41:36 pmDCA - LIS

2 stops13h 09mIberia

Deal found 6/18

$594

Sat 11/226:00 amOPO - DCA

2 stops21h 37mAir Canada

Fri 12/56:50 pmDCA - OPO

2 stops15h 25mAir Canada

Deal found 6/17

$608

Mon 6/234:35 pmOPO - DCA

2 stops31h 50mIberia

Mon 7/71:25 pmDCA - OPO

2 stops21h 30mIberia

Deal found 6/16

$611

Tue 7/226:45 amLIS - DCA

2 stops17h 24mUnited Airlines

Mon 9/14:00 pmDCA - LIS

1 stop11h 20mUnited Airlines

Deal found 6/18

$647

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 June 18, 2025.

Thu 9/116:30 amOPO - DCA

2 stops20h 49mDelta

Thu 9/2511:00 amDCA - OPO

2 stops16h 25mDelta

Deal found 6/18

$494

Sat 12/610:30 amLIS - DCA

1 stop11h 19mMultiple Airlines

Sat 12/1311:50 amDCA - LIS

1 stop16h 15mMultiple Airlines

Deal found 6/17

$498

Tue 7/2211:05 amLIS - DCA

2 stops24h 44mAmerican Airlines

Tue 9/22:59 pmDCA - LIS

2 stops19h 31mAmerican Airlines

Deal found 6/18

$512

Sat 12/610:30 amLIS - DCA

1 stop11h 19mBritish Airways

Sat 12/134:45 pmDCA - LIS

2 stops14h 25mBritish Airways

Deal found 6/18

$520

Mon 10/612:45 pmLIS - DCA

1 stop11h 26mKLM

Thu 10/163:30 pmDCA - LIS

1 stop14h 15mKLM

Deal found 6/18

$567

Mon 10/612:45 pmLIS - DCA

2 stops14h 34mVirgin Atlantic

Thu 10/1611:00 amDCA - LIS

2 stops18h 45mVirgin Atlantic

Deal found 6/18

$572

Thu 9/1112:10 pmOPO - DCA

1 stop32h 41mUnited Airlines

Thu 9/258:40 pmDCA - OPO

2 stops33h 35mUnited Airlines

Deal found 6/18

$582

Tue 7/2212:30 pmLIS - DCA

2 stops15h 41mIberia

Thu 9/41:36 pmDCA - LIS

2 stops13h 09mIberia

Deal found 6/18

$594

Sat 11/226:00 amOPO - DCA

2 stops21h 37mAir Canada

Fri 12/56:50 pmDCA - OPO

2 stops15h 25mAir Canada

Deal found 6/17

$608

Sun 8/246:35 amLIS - DCA

2 stops21h 43mFinnair

Sun 8/317:20 pmDCA - LIS

2 stops22h 45mFinnair

Deal found 6/16

$765

Mon 10/65:00 amLIS - DCA

2 stops19h 11mDelta

Thu 10/1612:00 pmDCA - LIS

1 stop17h 45mDelta

Deal found 6/18

$556

Wed 10/86:10 pmOPO - DCA

1 stop20h 36mTAP AIR PORTUGAL

Tue 10/212:59 pmDCA - OPO

2 stops18h 06mTAP AIR PORTUGAL

Deal found 6/18

$1,148

Last-minute flights from Portugal to Reagan-National
Discover last-minute flight deals from Portugal to Reagan-National. Data last updated June 18, 2025 and is based on user searches.

Mon 6/236:30 amOPO - DCA

2 stops20h 40mDelta

Wed 7/91:25 pmDCA - OPO

2 stops16h 15mDelta

Deal found 6/16

$502

Mon 6/234:35 pmOPO - DCA

2 stops31h 50mIberia

Mon 7/71:25 pmDCA - OPO

2 stops21h 30mIberia

Deal found 6/16

$611

Mon 6/239:00 amOPO - DCA

1 stop13h 54mUnited Airlines

Mon 7/74:05 pmDCA - OPO

1 stop9h 50mUnited Airlines

Deal found 6/16

$682

Mon 6/231:30 pmOPO - DCA

3 stops27h 33mMultiple Airlines

Mon 7/76:00 amDCA - OPO

3 stops24h 40mMultiple Airlines

Deal found 6/16

$927

Mon 6/238:50 amOPO - DCA

2 stops17h 58mAir Canada

Mon 7/74:30 pmDCA - OPO

1 stop12h 05mAir Canada

Deal found 6/16

$993

Fri 6/2711:05 amLIS - DCA

2 stops26h 54mAmerican Airlines

Sun 7/1310:15 pmDCA - LIS

1 stop29h 50mAmerican Airlines

Deal found 6/18

$547

Fri 6/2712:45 pmLIS - DCA

1 stop12h 09mKLM

Sun 7/132:55 pmDCA - LIS

1 stop14h 50mKLM

Deal found 6/17

$598

Fri 6/2712:45 pmLIS - DCA

2 stops15h 12mVirgin Atlantic

Sun 7/136:05 amDCA - LIS

1 stop20h 55mVirgin Atlantic

Deal found 6/16

$601

Fri 6/2712:45 pmLIS - DCA

1 stop16h 11mDelta

Sun 7/132:55 pmDCA - LIS

1 stop14h 50mDelta

Deal found 6/17

$681

Fri 6/2711:25 amLIS - DCA

1 stop15h 23mUnited Airlines

Sun 7/133:30 pmDCA - LIS

1 stop11h 50mUnited Airlines

Deal found 6/18

$685

Fri 6/2711:05 amLIS - DCA

1 stop13h 54mBritish Airways

Sun 7/133:59 pmDCA - LIS

1 stop12h 06mBritish Airways

Deal found 6/16

$721

Fri 6/2711:25 amLIS - DCA

1 stop27h 53mAir Canada

Sun 7/136:40 pmDCA - LIS

1 stop11h 25mAir Canada

Deal found 6/17

$738

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 June 18, 2025.

Tue 9/238:25 amOPO - DCA

1 stop12h 26mMultiple Airlines

Deal found 6/17

$454

Thu 10/168:15 amLIS - DCA

1 stop18h 36mMultiple Airlines

Deal found 6/17

$473

Tue 9/2312:20 pmOPO - DCA

2 stops15h 47mBritish Airways

Deal found 6/17

$548

Tue 10/712:20 pmOPO - DCA

2 stops35h 55mAmerican Airlines

Deal found 6/16

$549

Tue 9/238:15 amOPO - DCA

2 stops19h 52mIberia

Deal found 6/18

$550

Sun 8/316:35 amLIS - DCA

2 stops21h 43mFinnair

Deal found 6/17

$551

Tue 10/77:15 amLIS - DCA

2 stops20h 40mAmerican Airlines

Deal found 6/16

$554

Sat 9/2012:30 pmLIS - DCA

2 stops15h 37mBritish Airways

Deal found 6/17

$557

Sat 9/208:25 amLIS - DCA

2 stops15h 37mIberia

Deal found 6/18

$558

Wed 10/812:45 pmLIS - DCA

1 stop14h 08mKLM

Deal found 6/16

$595

Sun 9/1412:45 pmLIS - DCA

1 stop15h 44mDelta

Deal found 6/16

$608

Wed 8/610:00 amLIS - DCA

1 stop13h 14mAir France

Deal found 6/17

$673

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

Thu 9/11

6:30 am-10:19 pm

2 stops20h 49m

Washington, D.C. Reagan-National

Thu 9/25

11:00 am-8:25 am

2 stops16h 25m

$494

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Sat 12/6

10:30 am-4:49 pm

1 stop11h 19m

Washington, D.C. Reagan-National

Sat 12/13

11:50 am-9:05 am

1 stop16h 15m

$498

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Tue 7/22

11:05 am-6:49 am

2 stops24h 44m

Washington, D.C. Reagan-National

Tue 9/2

2:59 pm-3:30 pm

2 stops19h 31m

$512

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Sat 12/6

10:30 am-4:49 pm

1 stop11h 19m

Washington, D.C. Reagan-National

Sat 12/13

4:45 pm-12:10 pm

2 stops14h 25m

$520

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Mon 10/6

5:00 am-7:11 pm

2 stops19h 11m

Washington, D.C. Reagan-National

Thu 10/16

12:00 pm-10:45 am

1 stop17h 45m

$556

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Mon 10/6

12:45 pm-7:11 pm

1 stop11h 26m

Washington, D.C. Reagan-National

Thu 10/16

3:30 pm-10:45 am

1 stop14h 15m

$567

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Mon 10/6

12:45 pm-10:19 pm

2 stops14h 34m

Washington, D.C. Reagan-National

Thu 10/16

11:00 am-10:45 am

2 stops18h 45m

$572

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 9/11

12:10 pm-3:51 pm

1 stop32h 41m

Washington, D.C. Reagan-National

Thu 9/25

8:40 pm-11:15 am

2 stops33h 35m

$582

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Tue 7/22

12:30 pm-11:11 pm

2 stops15h 41m

Washington, D.C. Reagan-National

Thu 9/4

1:36 pm-7:45 am

2 stops13h 09m

$594

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sat 11/22

6:00 am-10:37 pm

2 stops21h 37m

Washington, D.C. Reagan-National

Fri 12/5

6:50 pm-3:15 pm

2 stops15h 25m

$608

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/17

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

7,964 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,964 reviews

Delta

8.0

Very good

7,964 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,363 reviews

Delta

8.0

Very good

7,964 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

LOT

7.6

Good

1,081 reviews

Delta

8.0

Very good

7,964 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Finnair

7.6

Good

1,292 reviews

Delta

8.0

Very good

7,964 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air France

7.5

Good

1,466 reviews

Delta

8.0

Very good

7,964 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 $548. Users have also found prices from $549 and $550 on American Airlines and Iberia, 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 $336). 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

Woodbridge

Alexandria

Tysons

Silver Spring

Linthicum Heights

Fredericksburg

Fairfax

Gaithersburg

Easton

Towson

Manassas

Falls Church

Rockville

Springfield

National Harbor

Dundalk

Waldorf

Bowie

Hanover

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$454+ 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 9/23. 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 June 18, 2025.

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 June 18, 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 June 18, 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

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

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 June 18, 2025.