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 Iberia. According to our data, you can fly for as low as $370. Users have also found prices from $370 and $372 on American Airlines and British Airways, 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 March is currently the most expensive (average of $334). 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.

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.

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).

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.

$369+ Flights from Portugal to Washington, D.C. Reagan-National Airport

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Portugal to Reagan-National with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Portugal to Reagan-National

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$540 (American Airlines)
One-way from	$369 (American Airlines)
Popular in	July
Cheapest in	September
Average price	$777

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

Search Deals

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

Search Deals

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. 13% potential increase in price ($101 potential increase over avg. RT price).

Search Deals

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

Search Deals

Average for round-trip flights in October 2025

Search Deals

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 October 2, 2025.

Sat 11/810:40 amLIS - DCA

1 stop15h 20mAmerican Airlines

Sat 11/154:51 pmDCA - LIS

1 stop11h 14mAmerican Airlines

Deal found 9/30

$540

Wed 10/86:15 amOPO - DCA

2 stops21h 49mDelta

Tue 10/215:00 pmDCA - OPO

2 stops17h 30mDelta

Deal found 9/30

$549

Thu 10/3011:25 amOPO - DCA

2 stops15h 34mDelta

Fri 11/1411:10 amDCA - OPO

2 stops18h 20mDelta

Deal found 9/30

$558

Fri 11/216:00 amOPO - DCA

2 stops18h 45mAir Canada

Sun 12/711:05 amDCA - OPO

2 stops19h 05mAir Canada

Deal found 10/1

$576

Tue 12/235:00 amLIS - DCA

2 stops23h 59mUnited Airlines

Tue 12/307:30 amDCA - LIS

2 stops20h 25mUnited Airlines

Deal found 10/1

$581

Thu 11/65:00 amLIS - DCA

2 stops18h 00mDelta

Wed 11/191:15 pmDCA - LIS

2 stops17h 05mDelta

Deal found 10/2

$588

Thu 12/185:30 amLIS - DCA

2 stops17h 25mDelta

Thu 1/85:00 pmDCA - LIS

2 stops17h 10mDelta

Deal found 10/2

$590

Sat 11/85:00 amLIS - DCA

2 stops18h 00mDelta

Sat 11/152:00 pmDCA - LIS

1 stop13h 00mDelta

Deal found 10/1

$592

Thu 11/612:35 pmOPO - DCA

1 stop24h 54mUnited Airlines

Wed 11/198:00 amDCA - OPO

1 stop20h 30mUnited Airlines

Deal found 10/1

$596

Mon 12/226:10 amLIS - DCA

2 stops42h 18mUnited Airlines

Fri 1/210:30 amDCA - LIS

2 stops17h 50mUnited Airlines

Deal found 10/1

$601

Thu 10/1612:10 pmLIS - DCA

2 stops16h 42mDelta

Sun 10/195:00 pmDCA - LIS

1 stop10h 00mDelta

Deal found 10/2

$607

Thu 11/2010:15 amLIS - DCA

1 stop11h 31mUnited Airlines

Sun 11/234:00 pmDCA - LIS

1 stop11h 10mUnited Airlines

Deal found 10/1

$608

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 October 2, 2025.

Sat 11/810:40 amLIS - DCA

2 stops16h 35mAmerican Airlines

Sat 11/151:44 pmDCA - LIS

1 stop14h 21mAmerican Airlines

Deal found 9/30

$545

Tue 3/36:00 amOPO - DCA

2 stops16h 23mUnited Airlines

Sun 3/86:00 pmDCA - OPO

1 stop11h 30mUnited Airlines

Deal found 9/30

$573

Wed 1/75:00 amLIS - DCA

2 stops17h 27mDelta

Mon 1/125:00 pmDCA - LIS

2 stops17h 10mDelta

Deal found 10/2

$588

Thu 11/611:15 amOPO - DCA

2 stops16h 47mMultiple Airlines

Wed 11/192:59 pmDCA - OPO

2 stops14h 31mMultiple Airlines

Deal found 10/1

$630

Mon 11/311:25 amOPO - DCA

2 stops16h 34mAir France

Sun 11/162:59 pmDCA - OPO

2 stops14h 31mAir France

Deal found 10/2

$636

Sat 1/246:00 amOPO - DCA

2 stops19h 59mUnited Airlines

Fri 2/62:00 pmDCA - OPO

2 stops16h 40mUnited Airlines

Deal found 10/2

$581

Thu 11/65:00 amLIS - DCA

2 stops18h 00mDelta

Wed 11/191:15 pmDCA - LIS

2 stops17h 05mDelta

Deal found 10/1

$588

Thu 11/205:00 amLIS - DCA

2 stops17h 25mUnited Airlines

Sun 11/234:30 pmDCA - LIS

1 stop10h 40mUnited Airlines

Deal found 10/1

$581

Fri 11/2111:25 amLIS - DCA

2 stops16h 31mDelta

Tue 12/21:15 pmDCA - LIS

2 stops17h 05mDelta

Deal found 10/2

$588

Fri 11/76:00 amOPO - DCA

2 stops31h 55mMultiple Airlines

Thu 11/204:10 pmDCA - OPO

2 stops14h 55mMultiple Airlines

Deal found 10/1

$695

Tue 12/235:00 amLIS - DCA

2 stops35h 58mUnited Airlines

Tue 12/3011:05 amDCA - LIS

1 stop16h 50mUnited Airlines

Deal found 10/1

$581

Thu 12/185:30 amLIS - DCA

2 stops17h 25mDelta

Thu 1/85:00 pmDCA - LIS

2 stops17h 10mDelta

Deal found 10/2

$590

Sat 11/85:00 amLIS - DCA

2 stops19h 40mDelta

Sat 11/1512:39 pmDCA - LIS

2 stops15h 21mDelta

Deal found 10/1

$592

Sat 11/156:00 amOPO - DCA

2 stops19h 38mUnited Airlines

Sat 11/224:34 pmDCA - OPO

1 stop11h 56mUnited Airlines

Deal found 10/1

$637

Sun 2/155:00 amLIS - DCA

2 stops19h 09mDelta

Sun 3/112:00 pmDCA - LIS

1 stop15h 00mDelta

Deal found 10/2

$592

Wed 12/2412:30 pmOPO - DCA

2 stops28h 28mUnited Airlines

Sat 1/36:00 pmDCA - OPO

2 stops36h 40mUnited Airlines

Deal found 9/30

$645

Thu 10/306:35 amOPO - DCA

2 stops17h 05mDelta

Thu 11/611:10 amDCA - OPO

2 stops18h 20mDelta

Deal found 10/2

$640

Mon 11/312:35 pmOPO - DCA

1 stop23h 44mUnited Airlines

Sun 11/166:00 pmDCA - OPO

1 stop10h 30mUnited Airlines

Deal found 10/2

$707

Mon 3/211:15 amOPO - DCA

2 stops17h 18mDelta

Sun 3/810:35 amDCA - OPO

2 stops19h 55mDelta

Deal found 9/30

$654

Sun 11/211:25 amOPO - DCA

2 stops16h 37mDelta

Sat 11/1511:10 amDCA - OPO

2 stops18h 20mDelta

Deal found 10/1

$655

Last-minute flights from Portugal to Reagan-National
Discover last-minute flight deals from Portugal to Reagan-National. Data last updated October 2, 2025 and is based on user searches.

Wed 10/86:15 amOPO - DCA

2 stops21h 49mDelta

Tue 10/215:00 pmDCA - OPO

2 stops17h 30mDelta

Deal found 9/30

$549

Thu 10/1612:10 pmLIS - DCA

2 stops16h 42mDelta

Sun 10/195:00 pmDCA - LIS

1 stop10h 00mDelta

Deal found 10/2

$607

Thu 10/3011:25 amOPO - DCA

2 stops15h 34mDelta

Fri 11/1411:10 amDCA - OPO

2 stops18h 20mDelta

Deal found 9/30

$558

Thu 11/65:00 amLIS - DCA

2 stops18h 00mDelta

Wed 11/191:15 pmDCA - LIS

2 stops17h 05mDelta

Deal found 10/2

$588

Thu 11/612:35 pmOPO - DCA

1 stop24h 54mUnited Airlines

Wed 11/198:00 amDCA - OPO

1 stop20h 30mUnited Airlines

Deal found 10/1

$596

Thu 11/610:15 amLIS - DCA

1 stop33h 20mUnited Airlines

Wed 11/193:20 pmDCA - LIS

1 stop11h 50mUnited Airlines

Deal found 10/1

$610

Sat 11/810:40 amLIS - DCA

1 stop15h 20mAmerican Airlines

Sat 11/154:51 pmDCA - LIS

1 stop11h 14mAmerican Airlines

Deal found 9/30

$540

Sat 11/85:00 amLIS - DCA

2 stops18h 00mDelta

Sat 11/152:00 pmDCA - LIS

1 stop13h 00mDelta

Deal found 10/1

$592

Sat 11/155:00 amLIS - DCA

2 stops20h 38mUnited Airlines

Sat 11/228:40 pmDCA - LIS

1 stop31h 40mUnited Airlines

Deal found 10/1

$611

Thu 11/205:00 amLIS - DCA

2 stops17h 25mUnited Airlines

Sun 11/234:30 pmDCA - LIS

1 stop10h 40mUnited Airlines

Deal found 10/1

$581

Thu 11/206:10 amLIS - DCA

2 stops16h 55mAir Canada

Sun 11/236:50 pmDCA - LIS

2 stops15h 15mAir Canada

Deal found 10/1

$609

Fri 11/216:00 amOPO - DCA

2 stops18h 45mAir Canada

Sun 12/711:05 amDCA - OPO

2 stops19h 05mAir Canada

Deal found 10/1

$576

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 October 2, 2025.

Sun 12/711:05 amLIS - DCA

2 stops16h 25mAmerican Airlines

Deal found 10/1

$369

Thu 12/118:40 pmOPO - DCA

2 stops24h 45mIberia

Deal found 10/1

$370

Fri 12/511:05 amLIS - DCA

2 stops16h 25mAmerican Airlines

Deal found 10/1

$370

Wed 3/1810:40 amLIS - DCA

2 stops16h 06mBritish Airways

Deal found 10/2

$372

Wed 12/108:20 amOPO - DCA

2 stops15h 37mIberia

Deal found 10/1

$375

Sun 12/77:05 amLIS - DCA

2 stops19h 25mBritish Airways

Deal found 10/2

$377

Thu 11/2010:55 amLIS - DCA

1 stop15h 03mMultiple Airlines

Deal found 10/1

$378

Tue 11/2511:05 amLIS - DCA

2 stops16h 10mMultiple Airlines

Deal found 10/2

$379

Mon 11/247:05 amLIS - DCA

2 stops16h 21mBritish Airways

Deal found 10/1

$396

Sun 12/217:05 amLIS - DCA

2 stops17h 30mBritish Airways

Deal found 10/1

$400

Mon 11/246:30 amLIS - DCA

2 stops17h 26mIberia

Deal found 10/2

$425

Sun 12/2111:05 amLIS - DCA

1 stop10h 30mAmerican Airlines

Deal found 10/1

$431

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

Sat 11/8

10:40 am-10:15 pm

2 stops16h 35m

Washington, D.C. Reagan-National

Sat 11/15

1:44 pm-9:05 am

1 stop14h 21m

$545

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Tue 3/3

6:00 am-5:23 pm

2 stops16h 23m

Washington, D.C. Reagan-National

Sun 3/8

6:00 pm-9:30 am

1 stop11h 30m

$573

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sat 1/24

6:00 am-8:59 pm

2 stops19h 59m

Washington, D.C. Reagan-National

Fri 2/6

2:00 pm-11:40 am

2 stops16h 40m

$581

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Thu 11/20

5:00 am-5:25 pm

2 stops17h 25m

Washington, D.C. Reagan-National

Sun 11/23

4:30 pm-8:10 am

1 stop10h 40m

$581

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Tue 12/23

5:00 am-11:58 am

2 stops35h 58m

Washington, D.C. Reagan-National

Tue 12/30

11:05 am-8:55 am

1 stop16h 50m

$581

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Wed 1/7

5:00 am-5:27 pm

2 stops17h 27m

Washington, D.C. Reagan-National

Mon 1/12

5:00 pm-3:10 pm

2 stops17h 10m

$588

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Thu 11/6

5:00 am-6:00 pm

2 stops18h 00m

Washington, D.C. Reagan-National

Wed 11/19

1:15 pm-11:20 am

2 stops17h 05m

$588

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Fri 11/21

11:25 am-10:56 pm

2 stops16h 31m

Washington, D.C. Reagan-National

Tue 12/2

1:15 pm-11:20 am

2 stops17h 05m

$588

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Thu 12/18

5:30 am-5:55 pm

2 stops17h 25m

Washington, D.C. Reagan-National

Thu 1/8

5:00 pm-3:10 pm

2 stops17h 10m

$590

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Sat 11/8

5:00 am-7:40 pm

2 stops19h 40m

Washington, D.C. Reagan-National

Sat 11/15

12:39 pm-9:00 am

2 stops15h 21m

$592

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/1

Showing 1-10 of 42 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

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from Portugal to Washington, D.C. Reagan-National Airport?
Departing from Portugal to Washington, D.C. Reagan-National Airport will take you 16h 23m. Airlines will cover a distance of 3520 mi. Both multi-stop and nonstop flights can be found to your destination and back.
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 Iberia. According to our data, you can fly for as low as $370. Users have also found prices from $370 and $372 on American Airlines and British Airways, 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 March is currently the most expensive (average of $334). 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

Woodbridge

Arlington

Alexandria

Tysons

Silver Spring

Springfield

Hanover

Gaithersburg

Fredericksburg

Fairfax

Linthicum Heights

Falls Church

Owings Mills

Manassas

Oxon Hill

Laurel

Towson

National Harbor

Dundalk

Waldorf

Browse thousands of different options on Cheapflights for your next trip

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$369+ 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 12/7. 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 October 2, 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 October 2, 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 October 2, 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

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.

How long is the flight from Portugal to Washington, D.C. Reagan-National Airport?

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 Washington, D.C. Reagan-National Airport?

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.

100% Free

Book with Flexibility

Travel Smart

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 October 2, 2025.