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Cheap flights from Washington, D.C. Reagan-National Airport to Portugal from $342

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 11/10. 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
12:30 pm - 9:56 pmOPO-DCA
38h 26m2 stops
$493United Airlines
Find Deal
Sun, Nov 23 - Tue, Dec 2
United Airlines Logo
6:00 pm - 9:30 amDCA-OPO
10h 30m1 stop
United Airlines Logo
12:35 pm - 7:35 pmOPO-DCA
12h 00m1 stop
$494United Airlines
Find Deal
Wed, Nov 12 - Wed, Nov 19
Delta Logo
5:00 pm - 3:25 pmDCA-OPO
17h 25m2 stops
Delta Logo
6:05 am - 6:59 pmOPO-DCA
17h 54m2 stops
$497Delta
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Mon, Nov 3 - Tue, Nov 11
Delta Logo
4:50 pm - 3:25 pmDCA-OPO
17h 35m2 stops
Delta Logo
6:05 am - 6:59 pmOPO-DCA
17h 54m2 stops
$498Delta
Find Deal
Mon, Nov 3 - Tue, Nov 11
Air Canada Logo
8:40 pm - 3:15 pmDCA-OPO
37h 35m2 stops
Air Canada Logo
6:00 am - 10:35 pmOPO-DCA
21h 35m2 stops
$501Air Canada
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Sat, Nov 22 - Tue, Dec 2
Multiple Airlines Logo
9:11 am - 9:30 amDCA-OPO
19h 19m1 stop
Multiple Airlines Logo
6:00 am - 10:35 pmOPO-DCA
21h 35m2 stops
$505Multiple Airlines
Find Deal
Thu, Nov 27 - Tue, Dec 2
Air Canada Logo
6:00 am - 12:50 pmDCA-OPO
25h 50m2 stops
Air Canada Logo
6:00 am - 8:55 amOPO-DCA
31h 55m2 stops
$508Air Canada
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Sun, Feb 1 - Sat, Feb 21
Multiple Airlines Logo
4:10 pm - 12:05 pmDCA-OPO
14h 55m2 stops
Multiple Airlines Logo
12:30 pm - 10:35 pmOPO-DCA
39h 05m2 stops
$528Multiple Airlines
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Fri, Nov 28 - Mon, Dec 1
TAP AIR PORTUGAL Logo
1:00 pm - 6:35 pmDCA-PDL
25h 35m2 stops
TAP AIR PORTUGAL Logo
6:35 am - 9:51 pmPDL-DCA
19h 16m2 stops
$980TAP AIR PORTUGAL
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Wed, Jan 7 - Wed, Jan 14
TAP AIR PORTUGAL Logo
11:45 am - 8:15 amDCA-PDL
16h 30m2 stops
TAP AIR PORTUGAL Logo
7:25 pm - 7:40 pmPDL-DCA
28h 15m2 stops
$1,034TAP AIR PORTUGAL
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Mon, Nov 10 - Wed, Nov 19

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
Feb 12
DCA11:00 amWashington, D.C. Reagan-National
23h 40m
2 stops
LIS3:40 pmLisbon Humberto Delgado
Feb 19
LIS6:55 pmLisbon Humberto Delgado
33h 13m
2 stops
DCA11:08 pmWashington, D.C. Reagan-National
$574
Find similar
Scandinavian Airlines
Apr 10
DCA6:05 amWashington, D.C. Reagan-National
29h 05m
2 stops
LIS4:10 pmLisbon Humberto Delgado
Apr 17
LIS12:45 pmLisbon Humberto Delgado
39h 27m
2 stops
DCA11:12 pmWashington, D.C. Reagan-National
$577
Find similar
Scandinavian Airlines
Feb 22
DCA11:00 amWashington, D.C. Reagan-National
23h 40m
2 stops
LIS3:40 pmLisbon Humberto Delgado
Feb 26
LIS6:55 pmLisbon Humberto Delgado
33h 13m
2 stops
DCA11:08 pmWashington, D.C. Reagan-National
$608
Find similar

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

Our best Iberia deals on Washington, D.C. Reagan-National Airport to Portugal flight tickets
Iberia
Nov 15
DCA1:44 pmWashington, D.C. Reagan-National
15h 46m
2 stops
FNC10:30 amFunchal Madeira
Nov 23
FNC11:10 amFunchal Madeira
36h 46m
2 stops
DCA6:56 pmWashington, D.C. Reagan-National
$1,178
Find similar
Iberia
Oct 15
DCA12:59 pmWashington, D.C. Reagan-National
23h 06m
2 stops
LIS5:05 pmLisbon Humberto Delgado
Oct 21
LIS9:15 pmLisbon Humberto Delgado
30h 42m
2 stops
DCA10:57 pmWashington, D.C. Reagan-National
$1,297
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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 October 13, 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 11/23

6:00 pm-9:30 am

1 stop10h 30m

Porto

Tue 12/2

12:30 pm-9:56 pm

2 stops38h 26m

$493

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 11/12

6:00 pm-9:30 am

1 stop10h 30m

Porto

Wed 11/19

12:35 pm-7:35 pm

1 stop12h 00m

$494

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 11/3

5:00 pm-3:25 pm

2 stops17h 25m

Porto

Tue 11/11

6:05 am-6:59 pm

2 stops17h 54m

$497

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 11/3

4:50 pm-3:25 pm

2 stops17h 35m

Porto

Tue 11/11

6:05 am-6:59 pm

2 stops17h 54m

$498

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sat 11/22

8:40 pm-3:15 pm

2 stops37h 35m

Porto

Tue 12/2

6:00 am-10:35 pm

2 stops21h 35m

$501

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Thu 11/27

9:11 am-9:30 am

1 stop19h 19m

Porto

Tue 12/2

6:00 am-10:35 pm

2 stops21h 35m

$505

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sun 2/1

6:00 am-12:50 pm

2 stops25h 50m

Porto

Sat 2/21

6:00 am-8:55 am

2 stops31h 55m

$508

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Fri 11/28

4:10 pm-12:05 pm

2 stops14h 55m

Porto

Mon 12/1

12:30 pm-10:35 pm

2 stops39h 05m

$528

Washington, D.C.Ponta Delgada

DCA - PDL

DCAPDL

Washington, D.C. Reagan-National

Wed 1/7

1:00 pm-6:35 pm

2 stops25h 35m

Ponta Delgada Nordela

Wed 1/14

6:35 am-9:51 pm

2 stops19h 16m

$980

Washington, D.C.Ponta Delgada

DCA - PDL

DCAPDL

Washington, D.C. Reagan-National

Mon 11/10

11:45 am-8:15 am

2 stops16h 30m

Ponta Delgada Nordela

Wed 11/19

7:25 pm-7:40 pm

2 stops28h 15m

$1,034

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 September. Flight prices, which tend to average around $685, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Portugal from Washington, D.C. Reagan-National Airport during November instead. Flights to Portugal in November, while not as cheap as those in September, still average around $756.

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 15% 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

Direct flights

None
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
8,973 reviews
Search United Airlines flights
TAP AIR PORTUGALPriceFrom $561Free CancellationRating
7.1
2,009 reviews
Search TAP AIR PORTUGAL flights
LufthansaPriceFrom $968Free CancellationRating
6.8
7,479 reviews
Search Lufthansa 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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