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Cheap flights from Washington, D.C. Reagan-National Airport to Portugal from $316

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Reagan-National Airport to Portugal departing on 1/10. 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 Washington, D.C. Reagan-National Airport to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:00 pm - 9:30 amDCA-OPO
10h 30m1 stop
United Airlines Logo
12:35 pm - 9:35 pmOPO-DCA
13h 00m1 stop
$444United Airlines
Find Deal
Sun, Mar 1 - Tue, Mar 10
United Airlines Logo
8:10 pm - 9:30 amDCA-OPO
9h 20m1 stop
United Airlines Logo
12:35 pm - 9:35 pmOPO-DCA
13h 00m1 stop
$445United Airlines
Find Deal
Tue, Mar 10 - Wed, Mar 18
Multiple Airlines Logo
11:05 am - 11:15 amDCA-OPO
19h 10m2 stops
Multiple Airlines Logo
6:00 am - 8:55 amOPO-DCA
30h 55m2 stops
$449Multiple Airlines
Find Deal
Mon, Mar 2 - Tue, Mar 10
American Airlines Logo
12:10 pm - 7:40 amDCA-OPO
14h 30m2 stops
American Airlines Logo
8:20 am - 6:56 pmOPO-DCA
15h 36m2 stops
$451American Airlines
Find Deal
Wed, Jan 14 - Wed, Jan 21
United Airlines Logo
4:10 pm - 9:30 amDCA-OPO
12h 20m1 stop
United Airlines Logo
6:00 am - 8:59 pmOPO-DCA
18h 59m2 stops
$459United Airlines
Find Deal
Mon, Mar 2 - Tue, Mar 10
Iberia Logo
5:30 pm - 11:45 amDCA-OPO
13h 15m2 stops
Iberia Logo
8:20 am - 10:35 pmOPO-DCA
19h 15m2 stops
$460Iberia
Find Deal
Tue, Feb 24 - Tue, Mar 3
Air Canada Logo
6:00 am - 11:15 amDCA-OPO
25h 15m2 stops
Air Canada Logo
11:05 am - 10:43 pmOPO-DCA
16h 38m2 stops
$465Air Canada
Find Deal
Tue, Mar 24 - Tue, Mar 31
Air Canada Logo
6:00 am - 12:05 pmDCA-OPO
25h 05m2 stops
Air Canada Logo
6:00 am - 10:23 amOPO-DCA
57h 23m2 stops
$469Air Canada
Find Deal
Mon, Jan 12 - Mon, Jan 26
Multiple Airlines Logo
11:00 am - 4:00 pmDCA-LIS
24h 00m2 stops
Multiple Airlines Logo
7:15 am - 10:36 pmLIS-DCA
20h 21m2 stops
$634Multiple Airlines
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Sat, Apr 4 - Sun, Apr 12
TAP AIR PORTUGAL Logo
2:05 pm - 11:00 amDCA-TER
16h 55m2 stops
TAP AIR PORTUGAL Logo
11:50 am - 7:01 amTER-DCA
23h 11m2 stops
$1,180TAP AIR PORTUGAL
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Tue, Mar 3 - Sat, Mar 7

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

Our best Scandinavian Airlines deals on Washington, D.C. Reagan-National Airport to Portugal flight tickets
Scandinavian Airlines
Jan 10
DCA11:10 amWashington, D.C. Reagan-National
29h 20m
2 stops
LIS9:30 pmLisbon Humberto Delgado
Jan 16
LIS6:55 amLisbon Humberto Delgado
20h 53m
2 stops
DCA10:48 pmWashington, D.C. Reagan-National
$644
Find similar
Scandinavian Airlines
Feb 4
DCA11:11 amWashington, D.C. Reagan-National
29h 24m
2 stops
LIS9:35 pmLisbon Humberto Delgado
Feb 9
LIS6:45 amLisbon Humberto Delgado
18h 07m
2 stops
DCA7:52 pmWashington, D.C. Reagan-National
$646
Find similar
Scandinavian Airlines
Apr 1
DCA11:00 amWashington, D.C. Reagan-National
24h 00m
2 stops
LIS4:00 pmLisbon Humberto Delgado
Apr 11
LIS7:00 amLisbon Humberto Delgado
20h 36m
2 stops
DCA10:36 pmWashington, D.C. Reagan-National
$647
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Air Canada flights from Washington, D.C. Reagan-National Airport to Portugal

Our best Air Canada deals on Washington, D.C. Reagan-National Airport to Portugal flight tickets
Air Canada
Mar 24
DCA6:00 amWashington, D.C. Reagan-National
25h 15m
2 stops
OPO11:15 amPorto
Mar 31
OPO11:05 amPorto
16h 38m
2 stops
DCA10:43 pmWashington, D.C. Reagan-National
$465
Find similar
Air Canada
Jan 12
DCA6:00 amWashington, D.C. Reagan-National
25h 05m
2 stops
OPO12:05 pmPorto
Jan 26
OPO6:00 amPorto
57h 23m
2 stops
DCA10:23 amWashington, D.C. Reagan-National
$469
Find similar
Air Canada
Mar 24
DCA11:05 amWashington, D.C. Reagan-National
20h 10m
2 stops
OPO11:15 amPorto
Apr 1
OPO6:00 amPorto
18h 53m
2 stops
DCA7:53 pmWashington, D.C. Reagan-National
$472
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Reagan-National Airport to Portugal 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 December 1, 2025.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sun 3/1

6:00 pm-9:30 am

1 stop10h 30m

Porto

Tue 3/10

12:35 pm-9:35 pm

1 stop13h 00m

$444

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 3/10

8:10 pm-9:30 am

1 stop9h 20m

Porto

Wed 3/18

12:35 pm-9:35 pm

1 stop13h 00m

$445

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 3/2

11:05 am-11:15 am

2 stops19h 10m

Porto

Tue 3/10

6:00 am-8:55 am

2 stops30h 55m

$449

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 1/14

12:10 pm-7:40 am

2 stops14h 30m

Porto

Wed 1/21

8:20 am-6:56 pm

2 stops15h 36m

$451

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 3/2

4:10 pm-9:30 am

1 stop12h 20m

Porto

Tue 3/10

6:00 am-8:59 pm

2 stops18h 59m

$459

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 2/24

5:30 pm-11:45 am

2 stops13h 15m

Porto

Tue 3/3

8:20 am-10:35 pm

2 stops19h 15m

$460

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 3/24

6:00 am-11:15 am

2 stops25h 15m

Porto

Tue 3/31

11:05 am-10:43 pm

2 stops16h 38m

$465

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 1/12

6:00 am-12:05 pm

2 stops25h 05m

Porto

Mon 1/26

6:00 am-10:23 am

2 stops57h 23m

$469

Washington, D.C.Lisbon

DCA - LIS

DCALIS

Washington, D.C. Reagan-National

Sat 4/4

11:00 am-4:00 pm

2 stops24h 00m

Lisbon Humberto Delgado

Sun 4/12

7:15 am-10:36 pm

2 stops20h 21m

$634

Washington, D.C.Lajes

DCA - TER

DCATER

Washington, D.C. Reagan-National

Tue 3/3

2:05 pm-11:00 am

2 stops16h 55m

Lajes

Sat 3/7

11:50 am-7:01 am

2 stops23h 11m

$1,180

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 Portugal from

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

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

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Washington, D.C. Reagan-National Airport is in November. Flight prices, which tend to average around $664, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Portugal from Washington, D.C. Reagan-National Airport during September instead. Flights to Portugal in September, while not as cheap as those in November, still average around $685.

What is the cheapest day to depart on your flight to Portugal?

According to our data, Monday is the cheapest day to fly to Portugal from Washington, D.C. Reagan-National Airport. The lowest ticket price found for a Monday departure recently was $881. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Friday, with ticket prices averaging around $1,225.

What is the cheapest time of day to depart on your flight to Portugal?

Our most recent data shows that the best time of day to fly to Portugal is in the evening. Flights from Washington, D.C. Reagan-National Airport to Portugal during this time can be as low as $1,008. At noon is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,302 per ticket.

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

You could potentially save up to 20% on your flight if you consider stops on a Washington, D.C. Reagan-National Airport to Portugal flight.

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

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

Fastest flight time

8h 40m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to Portugal takes 8h 40m
There are no direct flights from Washington, D.C. Reagan-National Airport to Portugal. There are no popular flight routes from Washington, D.C. Reagan-National Airport to Portugal.
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  • When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Portugal?

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

  • How many operators does momondo search for flights from Washington, D.C. Reagan-National Airport to Portugal?

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

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

  • What documentation or ID do you need to fly to Portugal?

    The required travel and health documents for your Portugal 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 Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Washington, D.C. Reagan-National Airport to Portugal

Compare and see reviews for airlines that fly from Washington, D.C. Reagan-National Airport to Portugal with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $520Free CancellationRating
7.4
9,056 reviews
Search United Airlines flights
TAP AIR PORTUGALPriceFrom $592Free CancellationRating
7.1
2,077 reviews
Search TAP AIR PORTUGAL flights

Why use momondo?

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

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

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

All flight searches from Washington, D.C. to Portugal on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Portugal.

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

Price alerts on flights to Portugal from Washington, D.C. are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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