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Cheap flights from Portugal to Washington, D.C. from $348

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 10/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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.
Delta Logo
5:00 am - 4:32 pm
OPO
-
DCA
16h 32m
2 stops
Delta Logo
2:00 pm - 10:30 am
DCA
-
OPO
15h 30m
2 stops
$640Delta
Sat, Sep 26 - Mon, Oct 5
Delta Logo
12:55 pm - 10:59 pm
OPO
-
DCA
15h 04m
1 stop
Delta Logo
5:05 pm - 10:30 am
DCA
-
OPO
12h 25m
1 stop
$650Delta
Sat, Sep 26 - Mon, Oct 5
Multiple Airlines Logo
8:25 am - 7:05 pm
LIS
-
DCA
15h 40m
2 stops
Multiple Airlines Logo
4:55 pm - 2:30 pm
DCA
-
LIS
16h 35m
2 stops
$651Multiple Airlines
Thu, Oct 15 - Tue, Oct 20
Iberia Logo
6:35 am - 9:30 pm
LIS
-
DCA
19h 55m
2 stops
Iberia Logo
12:59 pm - 11:50 am
DCA
-
LIS
17h 51m
2 stops
$654Iberia
Thu, Aug 27 - Wed, Sep 9
Delta Logo
5:00 am - 5:51 pm
LIS
-
DCA
17h 51m
2 stops
Delta Logo
12:55 pm - 8:50 am
DCA
-
LIS
14h 55m
2 stops
$670Delta
Fri, Aug 28 - Sun, Sep 6
Delta Logo
5:00 am - 5:51 pm
LIS
-
DCA
17h 51m
2 stops
Delta Logo
12:55 pm - 8:50 am
DCA
-
LIS
14h 55m
2 stops
$671Delta
Fri, Aug 28 - Sun, Sep 6
KLM Logo
12:45 pm - 11:43 pm
LIS
-
DCA
15h 58m
1 stop
KLM Logo
3:15 pm - 10:45 am
DCA
-
LIS
14h 30m
1 stop
$687KLM
Wed, Aug 26 - Sun, Oct 11
Air Canada Logo
6:00 am - 7:58 pm
OPO
-
DCA
18h 58m
2 stops
Air Canada Logo
11:05 am - 11:15 am
DCA
-
OPO
19h 10m
2 stops
$693Air Canada
Fri, Nov 13 - Tue, Nov 17
Air Canada Logo
6:00 am - 7:58 pm
OPO
-
DCA
18h 58m
2 stops
Air Canada Logo
11:05 am - 11:15 am
DCA
-
OPO
19h 10m
2 stops
$698Air Canada
Fri, Nov 13 - Tue, Nov 17
Multiple Airlines Logo
12:15 pm - 3:38 pm
OPO
-
DCA
32h 23m
1 stop
Multiple Airlines Logo
4:20 pm - 7:00 am
DCA
-
OPO
9h 40m
1 stop
$703Multiple Airlines
Sun, Aug 30 - Tue, Sep 15

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

Our best KLM deals on Portugal to Washington, D.C. Reagan-National Airport flight tickets
KLM
Aug 26
LIS12:45 pmLisbon Humberto Delgado
15h 58m
1 stop
DCA11:43 pmWashington, D.C. Reagan-National
Oct 11
DCA3:15 pmWashington, D.C. Reagan-National
14h 30m
1 stop
LIS10:45 amLisbon Humberto Delgado
$687
KLM
Aug 28
LIS10:00 amLisbon Humberto Delgado
11h 59m
1 stop
DCA4:59 pmWashington, D.C. Reagan-National
Sep 6
DCA5:00 pmWashington, D.C. Reagan-National
16h 35m
2 stops
LIS2:35 pmLisbon Humberto Delgado
$769
KLM
Aug 18
LIS12:45 pmLisbon Humberto Delgado
14h 20m
1 stop
DCA10:05 pmWashington, D.C. Reagan-National
Aug 25
DCA3:15 pmWashington, D.C. Reagan-National
14h 30m
1 stop
LIS10:45 amLisbon Humberto Delgado
$778

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

Our best American Airlines deals on Portugal to Washington, D.C. Reagan-National Airport flight tickets
American Airlines
Aug 29
LIS6:35 amLisbon Humberto Delgado
21h 08m
2 stops
DCA10:43 pmWashington, D.C. Reagan-National
Oct 12
DCA5:10 pmWashington, D.C. Reagan-National
10h 55m
1 stop
LIS9:05 amLisbon Humberto Delgado
$732
American Airlines
Jul 29
OPO12:25 pmPorto
16h 06m
2 stops
DCA11:31 pmWashington, D.C. Reagan-National
Sep 9
DCA3:06 pmWashington, D.C. Reagan-National
15h 39m
2 stops
OPO11:45 amPorto
$762
American Airlines
Jul 29
OPO8:20 amPorto
18h 59m
2 stops
DCA10:19 pmWashington, D.C. Reagan-National
Sep 9
DCA4:59 pmWashington, D.C. Reagan-National
13h 46m
2 stops
OPO11:45 amPorto
$763

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 July 8, 2026.
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

Cheapest round-trip

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sat 9/26

5:00 am-4:32 pm

2 stops16h 32m

Washington, D.C. Reagan-National

Mon 10/5

2:00 pm-10:30 am

2 stops15h 30m

$640
Quickest round-trip

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sat 9/26

12:55 pm-10:59 pm

1 stop15h 04m

Washington, D.C. Reagan-National

Mon 10/5

5:05 pm-10:30 am

1 stop12h 25m

$650

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Thu 10/15

8:25 am-7:05 pm

2 stops15h 40m

Washington, D.C. Reagan-National

Tue 10/20

4:55 pm-2:30 pm

2 stops16h 35m

$651

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Thu 8/27

6:35 am-9:30 pm

2 stops19h 55m

Washington, D.C. Reagan-National

Wed 9/9

12:59 pm-11:50 am

2 stops17h 51m

$654

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Fri 8/28

5:00 am-5:51 pm

2 stops17h 51m

Washington, D.C. Reagan-National

Sun 9/6

12:55 pm-8:50 am

2 stops14h 55m

$670

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Fri 8/28

5:00 am-5:51 pm

2 stops17h 51m

Washington, D.C. Reagan-National

Sun 9/6

12:55 pm-8:50 am

2 stops14h 55m

$671

LisbonWashington, D.C.

LIS - DCA

LISDCA

Lisbon Humberto Delgado

Wed 8/26

12:45 pm-11:43 pm

1 stop15h 58m

Washington, D.C. Reagan-National

Sun 10/11

3:15 pm-10:45 am

1 stop14h 30m

$687

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Fri 11/13

6:00 am-7:58 pm

2 stops18h 58m

Washington, D.C. Reagan-National

Tue 11/17

11:05 am-11:15 am

2 stops19h 10m

$693

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Fri 11/13

6:00 am-7:58 pm

2 stops18h 58m

Washington, D.C. Reagan-National

Tue 11/17

11:05 am-11:15 am

2 stops19h 10m

$698

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Sun 8/30

12:15 pm-3:38 pm

1 stop32h 23m

Washington, D.C. Reagan-National

Tue 9/15

4:20 pm-7:00 am

1 stop9h 40m

$703

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

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 44% 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

Fastest flight time

11h 08m

Direct flights

None
The fastest flight from Portugal to Washington, D.C. Reagan-National Airport takes 11h 08m
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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Frequently asked questions about flying from Portugal to Washington, D.C. Reagan-National Airport

  • 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
Arlington
Gettysburg
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Colonial Beach
Towson
Manassas
Silver Spring
Tysons
Springfield
Fairfax
Bethesda
Edgewood

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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