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 $335). 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).

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 75% 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 $572. 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 $672. You can even find prices in September for less than $672, as users have found deals to Washington, D.C. Reagan-National Airport from as low as $487. 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 31%.

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.

$498+ 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	$569 (United Airlines)
One-way from	$498 (Kiwi.com)
Popular in	July
Cheapest in	September
Average price	$770

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. 15% potential increase in price ($126 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).

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Average for round-trip flights in August 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 agosto 13, 2025.

mar 10/76:00 amOPO - DCA

2 stops20h 03mUnited Airlines

dom 10/195:27 pmDCA - OPO

1 stop11h 18mUnited Airlines

Deal found 8/11

$569

mer 10/297:05 amLIS - DCA

2 stops19h 59mMultiple Airlines

sab 11/82:00 pmDCA - LIS

2 stops21h 05mMultiple Airlines

Deal found 8/12

$575

dom 9/1411:20 amOPO - DCA

1 stop28h 00mUnited Airlines

lun 9/297:15 pmDCA - OPO

1 stop9h 30mUnited Airlines

Deal found 8/12

$585

mer 9/2411:40 amLIS - DCA

2 stops17h 13mDelta

mer 10/295:00 pmDCA - LIS

1 stop11h 40mDelta

Deal found 8/11

$589

ven 9/199:00 amOPO - DCA

1 stop12h 22mUnited Airlines

dom 10/55:27 pmDCA - OPO

1 stop11h 18mUnited Airlines

Deal found 8/11

$591

gio 9/1112:10 pmOPO - DCA

1 stop32h 41mAir Canada

sab 9/274:35 pmDCA - OPO

1 stop12h 00mAir Canada

Deal found 8/11

$592

ven 9/1211:40 amLIS - DCA

2 stops17h 13mDelta

dom 9/286:45 pmDCA - LIS

1 stop11h 00mDelta

Deal found 8/12

$596

ven 10/316:55 amLIS - DCA

2 stops20h 57mScandinavian Airlines

mar 11/111:30 pmDCA - LIS

2 stops21h 35mScandinavian Airlines

Deal found 8/12

$597

gio 12/1810:55 amLIS - DCA

1 stop16h 01mAir Canada

gio 1/86:00 amDCA - LIS

1 stop22h 20mAir Canada

Deal found 8/11

$598

gio 10/3010:40 amLIS - DCA

1 stop17h 12mDelta

dom 11/95:00 pmDCA - LIS

2 stops17h 10mDelta

Deal found 8/12

$599

mer 10/811:35 amOPO - DCA

2 stops15h 32mDelta

mar 10/215:00 pmDCA - OPO

2 stops17h 30mDelta

Deal found 8/12

$601

lun 9/811:40 amLIS - DCA

2 stops17h 01mDelta

lun 9/156:45 pmDCA - LIS

1 stop11h 00mDelta

Deal found 8/11

$602

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 agosto 13, 2025.

mar 10/76:00 amOPO - DCA

2 stops20h 03mUnited Airlines

dom 10/195:27 pmDCA - OPO

1 stop11h 18mUnited Airlines

Deal found 8/11

$569

mer 10/297:05 amLIS - DCA

2 stops19h 59mMultiple Airlines

sab 11/82:00 pmDCA - LIS

2 stops21h 05mMultiple Airlines

Deal found 8/12

$575

gio 9/255:00 amLIS - DCA

2 stops17h 05mDelta

lun 9/295:00 pmDCA - LIS

1 stop10h 00mDelta

Deal found 8/11

$589

mer 10/297:00 pmLIS - DCA

2 stops32h 52mScandinavian Airlines

mar 11/1111:00 amDCA - LIS

2 stops24h 05mScandinavian Airlines

Deal found 8/12

$597

mar 9/2312:50 pmOPO - DCA

1 stop14h 01mUnited Airlines

dom 10/57:00 pmDCA - OPO

1 stop9h 45mUnited Airlines

Deal found 8/11

$585

mer 9/2411:40 amLIS - DCA

2 stops17h 13mDelta

mer 10/295:00 pmDCA - LIS

1 stop11h 40mDelta

Deal found 8/11

$589

ven 10/316:55 amLIS - DCA

2 stops20h 57mScandinavian Airlines

sab 11/82:00 pmDCA - LIS

2 stops26h 30mScandinavian Airlines

Deal found 8/12

$597

dom 9/1411:20 amOPO - DCA

1 stop28h 00mUnited Airlines

lun 9/296:00 amDCA - OPO

2 stops22h 35mUnited Airlines

Deal found 8/12

$585

gio 9/115:00 amLIS - DCA

2 stops17h 57mDelta

sab 9/275:00 pmDCA - LIS

1 stop10h 00mDelta

Deal found 8/11

$596

dom 9/2111:20 amOPO - DCA

1 stop28h 00mUnited Airlines

dom 10/55:27 pmDCA - OPO

1 stop11h 18mUnited Airlines

Deal found 8/11

$585

ven 9/125:00 amLIS - DCA

2 stops17h 57mDelta

dom 9/285:00 pmDCA - LIS

1 stop10h 00mDelta

Deal found 8/11

$596

gio 9/1812:10 pmOPO - DCA

1 stop14h 41mUnited Airlines

dom 10/55:27 pmDCA - OPO

1 stop11h 18mUnited Airlines

Deal found 8/11

$585

Last-minute flights from Portugal to Reagan-National
Discover last-minute flight deals from Portugal to Reagan-National. Data last updated agosto 13, 2025 and is based on user searches.

lun 8/185:40 amLIS - DCA

2 stops18h 16mDelta

mar 11/115:00 pmDCA - LIS

2 stops17h 10mDelta

Deal found 8/11

$659

mar 8/195:40 amLIS - DCA

2 stops18h 16mDelta

mer 11/1212:59 pmDCA - LIS

2 stops14h 41mDelta

Deal found 8/11

$663

mar 8/1910:25 amLIS - DCA

1 stop10h 56mUnited Airlines

mer 11/125:00 pmDCA - LIS

1 stop10h 10mUnited Airlines

Deal found 8/11

$754

mar 8/1910:25 amLIS - DCA

1 stop11h 56mUnited Airlines

mar 11/114:10 pmDCA - LIS

1 stop12h 10mUnited Airlines

Deal found 8/11

$771

mar 8/1910:25 amLIS - DCA

1 stop10h 56mUnited Airlines

lun 11/103:00 pmDCA - LIS

1 stop12h 10mUnited Airlines

Deal found 8/11

$776

mer 8/2012:45 pmLIS - DCA

1 stop12h 09mDelta

gio 11/135:00 pmDCA - LIS

1 stop10h 00mDelta

Deal found 8/11

$679

mer 8/2012:45 pmLIS - DCA

1 stop14h 27mKLM

mer 11/125:00 pmDCA - LIS

1 stop10h 40mKLM

Deal found 8/11

$689

mer 8/2012:45 pmLIS - DCA

1 stop14h 27mKLM

mar 11/113:30 pmDCA - LIS

1 stop11h 30mKLM

Deal found 8/11

$690

mer 8/2012:45 pmLIS - DCA

1 stop14h 27mDelta

lun 11/101:30 pmDCA - LIS

1 stop13h 30mDelta

Deal found 8/11

$712

mer 8/2012:45 pmLIS - DCA

2 stops15h 11mDelta

ven 11/1412:00 pmDCA - LIS

1 stop15h 00mDelta

Deal found 8/11

$716

mer 8/2012:45 pmLIS - DCA

1 stop14h 27mDelta

dom 11/96:05 amDCA - LIS

1 stop21h 50mDelta

Deal found 8/11

$787

lun 8/2511:40 amLIS - DCA

2 stops17h 06mDelta

dom 9/711:00 amDCA - LIS

2 stops16h 50mDelta

Deal found 8/12

$608

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 agosto 13, 2025.

gio 9/119:35 pmOPO - DCA

3 stops48h 24mMultiple Airlines

Deal found 8/12

$498

mer 9/106:05 amOPO - DCA

3 stops59h 05mMultiple Airlines

Deal found 8/12

$535

gio 9/1810:25 pmOPO - DCA

3 stops47h 34mMultiple Airlines

Deal found 8/12

$535

dom 9/1410:20 pmLIS - DCA

3 stops29h 14mMultiple Airlines

Deal found 8/11

$541

mar 9/168:15 amLIS - DCA

3 stops32h 53mMultiple Airlines

Deal found 8/12

$545

mer 10/1512:20 pmOPO - DCA

2 stops15h 37mIberia

Deal found 8/12

$553

sab 10/1812:20 pmOPO - DCA

2 stops15h 37mBritish Airways

Deal found 8/11

$553

dom 10/58:15 amOPO - DCA

2 stops19h 52mIberia

Deal found 8/11

$553

gio 10/28:15 amOPO - DCA

2 stops19h 52mIberia

Deal found 8/11

$553

ven 10/1712:20 pmOPO - DCA

2 stops15h 37mIberia

Deal found 8/11

$553

mar 9/2312:20 pmOPO - DCA

2 stops15h 47mIberia

Deal found 8/11

$553

ven 10/1710:10 pmLIS - DCA

3 stops28h 41mMultiple Airlines

Deal found 8/11

$554

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

mar 10/7

6:00 am-9:03 pm

2 stops20h 03m

Washington, D.C. Reagan-National

dom 10/19

5:27 pm-9:45 am

1 stop11h 18m

$569

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

mer 10/29

7:05 am-11:04 pm

2 stops19h 59m

Washington, D.C. Reagan-National

sab 11/8

2:00 pm-4:05 pm

2 stops21h 05m

$575

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

mar 9/23

12:50 pm-9:51 pm

1 stop14h 01m

Washington, D.C. Reagan-National

dom 10/5

7:00 pm-9:45 am

1 stop9h 45m

$585

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

dom 9/14

11:20 am-10:20 am

1 stop28h 00m

Washington, D.C. Reagan-National

lun 9/29

6:00 am-9:35 am

2 stops22h 35m

$585

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

dom 9/21

11:20 am-10:20 am

1 stop28h 00m

Washington, D.C. Reagan-National

dom 10/5

5:27 pm-9:45 am

1 stop11h 18m

$585

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

gio 9/18

12:10 pm-9:51 pm

1 stop14h 41m

Washington, D.C. Reagan-National

dom 10/5

5:27 pm-9:45 am

1 stop11h 18m

$585

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

gio 9/25

5:00 am-5:05 pm

2 stops17h 05m

Washington, D.C. Reagan-National

lun 9/29

5:00 pm-8:00 am

1 stop10h 00m

$589

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

mer 9/24

11:40 am-11:53 pm

2 stops17h 13m

Washington, D.C. Reagan-National

mer 10/29

5:00 pm-8:40 am

1 stop11h 40m

$589

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

mer 9/24

9:35 am-4:22 pm

1 stop11h 47m

Washington, D.C. Reagan-National

dom 10/5

7:00 pm-9:45 am

1 stop9h 45m

$591

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

lun 9/22

9:00 am-4:22 pm

1 stop12h 22m

Washington, D.C. Reagan-National

dom 10/5

7:00 pm-9:45 am

1 stop9h 45m

$591

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 36 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

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 $335). 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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Woodbridge

Arlington

Alexandria

Tysons

Silver Spring

Springfield

Fredericksburg

Gaithersburg

Towson

Linthicum Heights

Fairfax

Manassas

Falls Church

Laurel

Rockville

Oxon Hill

National Harbor

Dundalk

Waldorf

Bowie

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$498+ 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 9/11. 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

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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 agosto 13, 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 agosto 13, 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 agosto 13, 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.

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?

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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 agosto 13, 2025.