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Cheap flights from Washington, D.C. Reagan-National Airport to Portugal 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 Washington, D.C. Reagan-National Airport to Portugal departing on 11/1. 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
0 bags

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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.
Multiple Airlines Logo
6:00 pm - 11:45 am
DCA
-
OPO
12h 45m
2 stops
Multiple Airlines Logo
8:20 am - 9:30 pm
OPO
-
DCA
18h 10m
2 stops
$756Multiple Airlines
Mon, Sep 21 - Tue, Sep 29
Air Canada Logo
9:40 am - 7:00 am
DCA
-
OPO
16h 20m
1 stop
Air Canada Logo
6:00 am - 9:50 pm
OPO
-
DCA
20h 50m
2 stops
$765Air Canada
Tue, Oct 13 - Tue, Oct 20
Delta Logo
5:00 pm - 10:30 am
DCA
-
OPO
12h 30m
1 stop
Delta Logo
5:00 am - 11:04 pm
OPO
-
DCA
22h 04m
2 stops
$773Delta
Mon, Oct 19 - Tue, Oct 27
Delta Logo
12:05 pm - 10:30 am
DCA
-
OPO
17h 25m
2 stops
Delta Logo
5:00 am - 11:04 pm
OPO
-
DCA
22h 04m
2 stops
$778Delta
Mon, Oct 19 - Tue, Oct 27
United Airlines Logo
6:00 am - 7:00 am
DCA
-
OPO
20h 00m
1 stop
United Airlines Logo
12:35 pm - 9:53 pm
OPO
-
DCA
14h 18m
1 stop
$780United Airlines
Tue, Oct 13 - Tue, Oct 20
United Airlines Logo
9:40 am - 7:00 am
DCA
-
OPO
16h 20m
1 stop
United Airlines Logo
12:35 pm - 9:24 am
OPO
-
DCA
25h 49m
1 stop
$785United Airlines
Tue, Oct 13 - Fri, Oct 16
United Airlines Logo
8:25 pm - 9:45 am
DCA
-
OPO
32h 20m
1 stop
United Airlines Logo
12:35 pm - 7:48 pm
OPO
-
DCA
12h 13m
1 stop
$786United Airlines
Mon, Oct 12 - Thu, Oct 15
United Airlines Logo
6:00 am - 7:00 am
DCA
-
OPO
20h 00m
1 stop
United Airlines Logo
11:40 am - 7:46 am
OPO
-
DCA
25h 06m
2 stops
$788United Airlines
Tue, Oct 13 - Thu, Oct 15
United Airlines Logo
4:30 pm - 9:45 am
DCA
-
OPO
12h 15m
1 stop
United Airlines Logo
12:15 pm - 11:45 am
OPO
-
DCA
28h 30m
2 stops
$791United Airlines
Mon, Sep 21 - Tue, Sep 29
Multiple Airlines Logo
11:00 am - 6:40 am
DCA
-
PDL
15h 40m
1 stop
Multiple Airlines Logo
10:30 am - 7:58 pm
PDL
-
DCA
13h 28m
1 stop
$832Multiple Airlines
Tue, Jun 9 - Tue, Jun 16

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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
Oct 14
DCA11:00 amWashington, D.C. Reagan-National
28h 40m
2 stops
LIS8:40 pmLisbon Humberto Delgado
Nov 30
LIS4:55 pmLisbon Humberto Delgado
35h 35m
2 stops
DCA11:30 pmWashington, D.C. Reagan-National
$922
Scandinavian Airlines
Oct 23
DCA6:05 amWashington, D.C. Reagan-National
29h 05m
2 stops
LIS4:10 pmLisbon Humberto Delgado
Oct 27
LIS12:50 pmLisbon Humberto Delgado
38h 14m
2 stops
DCA11:04 pmWashington, D.C. Reagan-National
$925
Scandinavian Airlines
Oct 19
DCA1:30 pmWashington, D.C. Reagan-National
26h 10m
2 stops
LIS8:40 pmLisbon Humberto Delgado
Oct 23
LIS7:00 amLisbon Humberto Delgado
21h 30m
2 stops
DCA11:30 pmWashington, D.C. Reagan-National
$942

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
Oct 13
DCA9:40 amWashington, D.C. Reagan-National
16h 20m
1 stop
OPO7:00 amPorto
Oct 20
OPO6:00 amPorto
20h 50m
2 stops
DCA9:50 pmWashington, D.C. Reagan-National
$765
Air Canada
Oct 13
DCA6:00 amWashington, D.C. Reagan-National
20h 00m
1 stop
OPO7:00 amPorto
Oct 16
OPO8:40 amPorto
42h 54m
2 stops
DCA10:34 pmWashington, D.C. Reagan-National
$831
Air Canada
Oct 13
DCA6:00 amWashington, D.C. Reagan-National
20h 00m
1 stop
OPO7:00 amPorto
Oct 17
OPO11:20 amPorto
29h 40m
2 stops
DCA12:00 pmWashington, D.C. Reagan-National
$833

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 May 5, 2026.
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

Cheapest round-trip

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 9/21

6:00 pm-11:45 am

2 stops12h 45m

Porto

Tue 9/29

8:20 am-9:30 pm

2 stops18h 10m

$756

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 10/13

9:40 am-7:00 am

1 stop16h 20m

Porto

Tue 10/20

6:00 am-9:50 pm

2 stops20h 50m

$765

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 10/19

5:00 pm-10:30 am

1 stop12h 30m

Porto

Tue 10/27

5:00 am-11:04 pm

2 stops22h 04m

$773

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 10/19

12:05 pm-10:30 am

2 stops17h 25m

Porto

Tue 10/27

5:00 am-11:04 pm

2 stops22h 04m

$778

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 10/13

6:00 am-7:00 am

1 stop20h 00m

Porto

Tue 10/20

12:35 pm-9:53 pm

1 stop14h 18m

$780

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 10/13

9:40 am-7:00 am

1 stop16h 20m

Porto

Fri 10/16

12:35 pm-9:24 am

1 stop25h 49m

$785

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 10/12

8:25 pm-9:45 am

1 stop32h 20m

Porto

Thu 10/15

12:35 pm-7:48 pm

1 stop12h 13m

$786

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 10/13

6:00 am-7:00 am

1 stop20h 00m

Porto

Thu 10/15

11:40 am-7:46 am

2 stops25h 06m

$788

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 9/21

4:30 pm-9:45 am

1 stop12h 15m

Porto

Tue 9/29

12:15 pm-11:45 am

2 stops28h 30m

$791
Quickest round-trip

Washington, D.C.Ponta Delgada

DCA - PDL

DCAPDL

Washington, D.C. Reagan-National

Tue 6/9

11:00 am-6:40 am

1 stop15h 40m

Ponta Delgada Nordela

Tue 6/16

10:30 am-7:58 pm

1 stop13h 28m

$832

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 December. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of December, then book flights to Portugal from Washington, D.C. Reagan-National Airport during April instead. Flights to Portugal in April, while not as cheap as those in December, still average around $0.

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

You could potentially save up to 17% 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 15m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to Portugal takes 8h 15m
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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Frequently asked questions about flying from Washington, D.C. Reagan-National Airport to Portugal

  • 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
9,683 reviews
Search United Airlines 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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