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Cheap flights from Washington, D.C. Reagan-National Airport to Porto from $386

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 Porto departing on 7/30. 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

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Find the cheapest flights from Washington, D.C. Reagan-National Airport to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:00 am - 7:00 am
DCA
-
OPO
20h 00m
1 stop
United Airlines Logo
2:25 pm - 1:59 pm
OPO
-
DCA
28h 34m
2 stops
$689United Airlines
Mon, Aug 3 - Wed, Aug 19
Air Canada Logo
12:40 pm - 7:00 am
DCA
-
OPO
37h 20m
2 stops
Air Canada Logo
2:25 pm - 12:00 pm
OPO
-
DCA
50h 35m
2 stops
$704Air Canada
Mon, Aug 3 - Wed, Aug 19
Delta Logo
5:00 pm - 3:25 pm
DCA
-
OPO
17h 25m
2 stops
Delta Logo
11:25 am - 10:41 pm
OPO
-
DCA
16h 16m
2 stops
$707Delta
Mon, Apr 20 - Thu, Apr 30
United Airlines Logo
4:20 pm - 7:00 am
DCA
-
OPO
9h 40m
1 stop
United Airlines Logo
9:00 am - 3:53 pm
OPO
-
DCA
11h 53m
1 stop
$709United Airlines
Mon, Aug 10 - Thu, Aug 20
United Airlines Logo
2:59 pm - 6:55 am
DCA
-
OPO
10h 56m
1 stop
United Airlines Logo
9:00 am - 3:53 pm
OPO
-
DCA
11h 53m
1 stop
$710United Airlines
Sun, Aug 9 - Thu, Aug 20
Delta Logo
5:00 pm - 3:30 pm
DCA
-
OPO
17h 30m
2 stops
Delta Logo
5:00 am - 4:36 pm
OPO
-
DCA
16h 36m
2 stops
$711Delta
Tue, Apr 14 - Tue, Apr 21
Delta Logo
7:56 pm - 6:20 pm
DCA
-
OPO
17h 24m
2 stops
Delta Logo
11:30 am - 11:41 pm
OPO
-
DCA
17h 11m
2 stops
$712Delta
Tue, Apr 21 - Tue, Apr 28
American Airlines Logo
1:29 pm - 7:40 am
DCA
-
OPO
13h 11m
2 stops
American Airlines Logo
8:20 am - 6:58 pm
OPO
-
DCA
15h 38m
2 stops
$714American Airlines
Sun, Apr 26 - Thu, May 7
Iberia Logo
1:25 pm - 7:40 am
DCA
-
OPO
13h 15m
2 stops
Iberia Logo
8:40 pm - 6:58 pm
OPO
-
DCA
27h 18m
2 stops
$725Iberia
Mon, Apr 27 - Mon, May 4
Delta Logo
12:59 pm - 3:25 pm
DCA
-
OPO
21h 26m
2 stops
Delta Logo
5:00 am - 4:33 pm
OPO
-
DCA
16h 33m
2 stops
$737Delta
Wed, Apr 29 - Thu, May 14

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

Our best United Airlines deals on Washington, D.C. Reagan-National Airport to Porto flight tickets
United Airlines
Aug 3
DCA6:00 amWashington, D.C. Reagan-National
20h 00m
1 stop
OPO7:00 amPorto
Aug 19
OPO2:25 pmPorto
28h 34m
2 stops
DCA1:59 pmWashington, D.C. Reagan-National
$689
United Airlines
Aug 10
DCA4:20 pmWashington, D.C. Reagan-National
9h 40m
1 stop
OPO7:00 amPorto
Aug 20
OPO9:00 amPorto
11h 53m
1 stop
DCA3:53 pmWashington, D.C. Reagan-National
$709
United Airlines
Aug 9
DCA2:59 pmWashington, D.C. Reagan-National
10h 56m
1 stop
OPO6:55 amPorto
Aug 20
OPO9:00 amPorto
11h 53m
1 stop
DCA3:53 pmWashington, D.C. Reagan-National
$710

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

Our best Air Canada deals on Washington, D.C. Reagan-National Airport to Porto flight tickets
Air Canada
Aug 3
DCA12:40 pmWashington, D.C. Reagan-National
37h 20m
2 stops
OPO7:00 amPorto
Aug 19
OPO2:25 pmPorto
50h 35m
2 stops
DCA12:00 pmWashington, D.C. Reagan-National
$704
Air Canada
Apr 15
DCA6:00 amWashington, D.C. Reagan-National
31h 30m
2 stops
OPO6:30 pmPorto
Apr 21
OPO6:20 amPorto
32h 59m
2 stops
DCA10:19 amWashington, D.C. Reagan-National
$756
Air Canada
Apr 25
DCA4:10 pmWashington, D.C. Reagan-National
45h 05m
2 stops
OPO6:15 pmPorto
May 7
OPO6:00 amPorto
21h 28m
2 stops
DCA10:28 pmWashington, D.C. Reagan-National
$760

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Reagan-National Airport to Porto 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 March 16, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Porto 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 8/3

6:00 am-7:00 am

1 stop20h 00m

Porto

Wed 8/19

2:25 pm-1:59 pm

2 stops28h 34m

$689

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 8/3

12:40 pm-7:00 am

2 stops37h 20m

Porto

Wed 8/19

2:25 pm-12:00 pm

2 stops50h 35m

$704

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 4/20

5:00 pm-3:25 pm

2 stops17h 25m

Porto

Thu 4/30

11:25 am-10:41 pm

2 stops16h 16m

$707
Quickest round-trip

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 8/10

4:20 pm-7:00 am

1 stop9h 40m

Porto

Thu 8/20

9:00 am-3:53 pm

1 stop11h 53m

$709

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sun 8/9

2:59 pm-6:55 am

1 stop10h 56m

Porto

Thu 8/20

9:00 am-3:53 pm

1 stop11h 53m

$710

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 4/14

5:00 pm-3:30 pm

2 stops17h 30m

Porto

Tue 4/21

5:00 am-4:36 pm

2 stops16h 36m

$711

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 4/21

7:56 pm-6:20 pm

2 stops17h 24m

Porto

Tue 4/28

11:30 am-11:41 pm

2 stops17h 11m

$712

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sun 4/26

1:29 pm-7:40 am

2 stops13h 11m

Porto

Thu 5/7

8:20 am-6:58 pm

2 stops15h 38m

$714

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 4/27

1:25 pm-7:40 am

2 stops13h 15m

Porto

Mon 5/4

8:40 pm-6:58 pm

2 stops27h 18m

$725

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 4/29

12:59 pm-3:25 pm

2 stops21h 26m

Porto

Thu 5/14

5:00 am-4:33 pm

2 stops16h 33m

$737

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Porto

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 Washington, D.C. Reagan-National Airport to Porto flights?

You could potentially save up to 8% on your flight if you consider stops on a Washington, D.C. Reagan-National Airport to Porto flight.

When to book flights from Washington, D.C. Reagan-National Airport to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Reagan-National Airport to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Reagan-National Airport to Porto (DCA to OPO) flight deals and tips

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

Fastest flight time

12h 30m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to Porto takes 12h 30m
There are no direct flights from Washington, D.C. Reagan-National Airport to Porto. There are no popular flight routes from Washington, D.C. Reagan-National Airport to Porto.
Search flight deals

  • How far is Washington, D.C. Reagan-National to Porto by plane?

    A flight from Washington, D.C. Reagan-National to Porto will travel around 3524.8 mi. By plane, this route typically takes 12h 30m.

  • When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Porto Airport?

    Prices for flights from Washington, D.C. Reagan-National Airport to Porto Airport refresh daily.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The travel and health documents required for your trip to Porto Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Washington, D.C. Reagan-National Airport to Porto?

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

Compare and see reviews for airlines that fly from Washington, D.C. Reagan-National Airport to Porto with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $520Free CancellationRating
7.4
9,428 reviews
Search United Airlines flights

Traveling to a place near Porto?

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Mira
Baiao

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

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

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