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Cheap flights from Portugal to Washington, D.C. from $346

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portugal to Washington, D.C. departing on 12/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Portugal to Washington, D.C.

Recent round-trip flight deals from Portugal to Washington, D.C.

Enter your travel dates to find the best prices.
Air Canada Logo
6:00 am - 7:45 pmOPO-DCA
18h 45m2 stops
Air Canada Logo
6:00 am - 11:10 amDCA-OPO
24h 10m2 stops
$559Air Canada
Find Deal
Thu, Nov 20 - Thu, Dec 4
United Airlines Logo
5:00 am - 4:56 pmLIS-DCA
16h 56m2 stops
United Airlines Logo
8:20 pm - 8:10 amDCA-LIS
30h 50m1 stop
$570United Airlines
Find Deal
Thu, Nov 20 - Wed, Dec 3
Multiple Airlines Logo
5:00 am - 6:05 pmLIS-DCA
18h 05m2 stops
Multiple Airlines Logo
9:40 am - 8:55 amDCA-LIS
18h 15m1 stop
$576Multiple Airlines
Find Deal
Thu, Nov 20 - Wed, Dec 3
Delta Logo
11:25 am - 11:08 pmOPO-DCA
16h 43m2 stops
Delta Logo
6:55 pm - 3:30 pmDCA-OPO
15h 35m2 stops
$580Delta
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Mon, Mar 30 - Mon, Apr 6
Delta Logo
5:00 am - 5:05 pmLIS-DCA
17h 05m2 stops
Delta Logo
5:00 pm - 3:10 pmDCA-LIS
17h 10m2 stops
$581Delta
Find Deal
Thu, Dec 4 - Sun, Jan 25
Virgin Atlantic Logo
10:00 am - 5:59 pmLIS-DCA
12h 59m1 stop
Virgin Atlantic Logo
6:00 am - 8:00 amDCA-LIS
21h 00m1 stop
$598Virgin Atlantic
Find Deal
Thu, Dec 4 - Sun, Jan 25
Virgin Atlantic Logo
10:55 am - 7:51 pmLIS-DCA
13h 56m1 stop
Virgin Atlantic Logo
2:55 pm - 8:00 amDCA-LIS
12h 05m1 stop
$599Virgin Atlantic
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Fri, Nov 21 - Thu, Dec 4
KLM Logo
11:25 am - 11:08 pmOPO-DCA
16h 43m2 stops
KLM Logo
2:30 pm - 10:40 amDCA-OPO
15h 10m2 stops
$614KLM
Find Deal
Sun, Mar 29 - Mon, Apr 6
Multiple Airlines Logo
11:05 am - 8:58 pmLIS-DCA
14h 53m1 stop
Multiple Airlines Logo
1:39 pm - 9:05 amDCA-LIS
14h 26m1 stop
$621Multiple Airlines
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Wed, Dec 10 - Thu, Feb 12
KLM Logo
11:25 am - 9:54 pmOPO-DCA
15h 29m2 stops
KLM Logo
2:30 pm - 10:40 amDCA-OPO
15h 10m2 stops
$830KLM
Find Deal
Mon, Mar 30 - Sun, Apr 5

Air Canada flights from Portugal to Washington, D.C. Reagan-National Airport

Our best Air Canada deals on Portugal to Washington, D.C. Reagan-National Airport flight tickets
Air Canada
Nov 20
OPO6:00 amPorto
18h 45m
2 stops
DCA7:45 pmWashington, D.C. Reagan-National
Dec 4
DCA6:00 amWashington, D.C. Reagan-National
24h 10m
2 stops
OPO11:10 amPorto
$559
Find similar
Air Canada
Nov 20
LIS10:55 amLisbon Humberto Delgado
28h 31m
1 stop
DCA10:26 amWashington, D.C. Reagan-National
Dec 3
DCA9:40 amWashington, D.C. Reagan-National
18h 15m
1 stop
LIS8:55 amLisbon Humberto Delgado
$587
Find similar
Air Canada
Dec 18
LIS10:55 amLisbon Humberto Delgado
16h 01m
1 stop
DCA9:56 pmWashington, D.C. Reagan-National
Jan 8
DCA6:00 amWashington, D.C. Reagan-National
22h 20m
1 stop
LIS9:20 amLisbon Humberto Delgado
$595
Find similar

United Airlines flights from Portugal to Washington, D.C. Reagan-National Airport

Our best United Airlines deals on Portugal to Washington, D.C. Reagan-National Airport flight tickets
United Airlines
Nov 20
LIS5:00 amLisbon Humberto Delgado
16h 56m
2 stops
DCA4:56 pmWashington, D.C. Reagan-National
Dec 3
DCA8:20 pmWashington, D.C. Reagan-National
30h 50m
1 stop
LIS8:10 amLisbon Humberto Delgado
$570
Find similar
United Airlines
Dec 4
LIS5:00 amLisbon Humberto Delgado
18h 05m
2 stops
DCA6:05 pmWashington, D.C. Reagan-National
Jan 25
DCA6:00 pmWashington, D.C. Reagan-National
9h 10m
1 stop
LIS8:10 amLisbon Humberto Delgado
$571
Find similar
United Airlines
Dec 5
LIS5:00 amLisbon Humberto Delgado
22h 42m
3 stops
DCA10:42 pmWashington, D.C. Reagan-National
Dec 14
DCA3:00 pmWashington, D.C. Reagan-National
12h 10m
1 stop
LIS8:10 amLisbon Humberto Delgado
$572
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Portugal to Washington, D.C. Reagan-National Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 2, 2025.
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 11/20

6:00 am-7:45 pm

2 stops18h 45m

Washington, D.C. Reagan-National

Thu 12/4

6:00 am-11:10 am

2 stops24h 10m

$559

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Thu 11/20

5:00 am-4:56 pm

2 stops16h 56m

Washington, D.C. Reagan-National

Wed 12/3

8:20 pm-8:10 am

1 stop30h 50m

$570

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Thu 11/20

5:00 am-6:05 pm

2 stops18h 05m

Washington, D.C. Reagan-National

Wed 12/3

9:40 am-8:55 am

1 stop18h 15m

$576

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 3/30

11:25 am-11:08 pm

2 stops16h 43m

Washington, D.C. Reagan-National

Mon 4/6

6:55 pm-3:30 pm

2 stops15h 35m

$580

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Thu 12/4

5:00 am-5:05 pm

2 stops17h 05m

Washington, D.C. Reagan-National

Sun 1/25

5:00 pm-3:10 pm

2 stops17h 10m

$581

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Thu 12/4

10:00 am-5:59 pm

1 stop12h 59m

Washington, D.C. Reagan-National

Sun 1/25

6:00 am-8:00 am

1 stop21h 00m

$598

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Fri 11/21

10:55 am-7:51 pm

1 stop13h 56m

Washington, D.C. Reagan-National

Thu 12/4

2:55 pm-8:00 am

1 stop12h 05m

$599

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 3/29

11:25 am-11:08 pm

2 stops16h 43m

Washington, D.C. Reagan-National

Mon 4/6

2:30 pm-10:40 am

2 stops15h 10m

$614

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Wed 12/10

11:05 am-8:58 pm

1 stop14h 53m

Washington, D.C. Reagan-National

Thu 2/12

1:39 pm-9:05 am

1 stop14h 26m

$621

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 3/30

11:25 am-9:54 pm

2 stops15h 29m

Washington, D.C. Reagan-National

Sun 4/5

2:30 pm-10:40 am

2 stops15h 10m

$830

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from Portugal to Washington, D.C. Reagan-National Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Can stopping save me money on Portugal to Washington, D.C. Reagan-National Airport flights?

You could potentially save up to 35% on your flight if you consider stops on a Portugal to Washington, D.C. Reagan-National Airport flight.

Cheap Portugal to Washington, D.C. Reagan-National Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portugal to Washington, D.C. Reagan-National Airport

Direct flights

None
There are no direct flights from Portugal to Washington, D.C. Reagan-National Airport. There are no popular flight routes from Portugal to Washington, D.C. Reagan-National Airport.
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  • When did momondo last update prices for flights from Portugal to Washington, D.C. Reagan-National Airport?

    Prices for flights from Portugal to Washington, D.C. Reagan-National Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Portugal to Washington, D.C. Reagan-National Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portugal to Washington, D.C. Reagan-National Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?

    The required travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Reagan-National Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Gaithersburg
Fairfax
Glen Burnie
Springfield
Linthicum Heights

Why use momondo?

Why should I use momondo to find a flight deal from Portugal to Washington, D.C.?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portugal to Washington, D.C.. momondo saves you time and could save you money on your trip.

Can I find flights from Portugal to Washington, D.C. with flexible booking policies on momondo?

Yes. All flights to Washington, D.C. from Portugal on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Portugal to Washington, D.C.?

momondo provides multiple filters to help you find the best flight to Washington, D.C. from Portugal. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Portugal to Washington, D.C. right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Portugal to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

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