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Cheap flights from Washington, D.C. Reagan-National Airport to Porto 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 Porto 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.
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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.
American Airlines Logo
11:59 am - 7:40 am
DCA
-
OPO
15h 41m
2 stops
American Airlines Logo
8:20 am - 6:51 pm
OPO
-
DCA
15h 31m
2 stops
$755American Airlines
Wed, Oct 28 - Tue, Nov 3
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
$774Delta
Mon, Oct 19 - Tue, Oct 27
Delta Logo
3:05 pm - 10:30 am
DCA
-
OPO
14h 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
11:30 am - 6:55 am
DCA
-
OPO
14h 25m
1 stop
United Airlines Logo
12:15 pm - 9:46 am
OPO
-
DCA
26h 31m
2 stops
$791United Airlines
Sun, Aug 16 - Tue, Aug 25
United Airlines Logo
6:00 am - 9:45 am
DCA
-
OPO
22h 45m
1 stop
United Airlines Logo
12:45 pm - 3:38 pm
OPO
-
DCA
31h 53m
1 stop
$792United Airlines
Wed, Aug 19 - Wed, Sep 2
Multiple Airlines Logo
10:00 am - 9:30 am
DCA
-
OPO
19h 30m
1 stop
Multiple Airlines Logo
12:35 pm - 8:38 pm
OPO
-
DCA
13h 03m
1 stop
$800Multiple Airlines
Wed, Oct 28 - Tue, Nov 3
United Airlines Logo
4:20 pm - 7:00 am
DCA
-
OPO
9h 40m
1 stop
United Airlines Logo
12:15 pm - 9:48 pm
OPO
-
DCA
14h 33m
1 stop
$803United Airlines
Wed, Aug 19 - Tue, Sep 1
United Airlines Logo
4:30 pm - 9:45 am
DCA
-
OPO
12h 15m
1 stop
United Airlines Logo
12:15 pm - 9:48 pm
OPO
-
DCA
14h 33m
1 stop
$804United Airlines
Sun, Aug 16 - Tue, Aug 25
Delta Logo
12:27 pm - 8:30 am
DCA
-
OPO
15h 03m
2 stops
Delta Logo
5:00 am - 4:29 pm
OPO
-
DCA
16h 29m
2 stops
$808Delta
Wed, Aug 19 - Wed, Sep 2
United Airlines Logo
4:20 pm - 7:00 am
DCA
-
OPO
9h 40m
1 stop
United Airlines Logo
9:00 am - 3:24 pm
OPO
-
DCA
11h 24m
1 stop
$810United Airlines
Mon, Aug 17 - Fri, Sep 4

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

Our best KLM deals on Washington, D.C. Reagan-National Airport to Porto flight tickets
KLM
Oct 1
DCA11:00 amWashington, D.C. Reagan-National
18h 30m
1 stop
OPO10:30 amPorto
Oct 29
OPO11:25 amPorto
15h 28m
2 stops
DCA10:53 pmWashington, D.C. Reagan-National
$871
KLM
Oct 22
DCA5:00 pmWashington, D.C. Reagan-National
12h 30m
1 stop
OPO10:30 amPorto
Oct 26
OPO10:00 amPorto
17h 04m
1 stop
DCA11:04 pmWashington, D.C. Reagan-National
$891
KLM
Sep 21
DCA11:00 amWashington, D.C. Reagan-National
18h 30m
1 stop
OPO10:30 amPorto
Sep 29
OPO1:05 pmPorto
15h 07m
1 stop
DCA11:12 pmWashington, D.C. Reagan-National
$894

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

Our best Delta deals on Washington, D.C. Reagan-National Airport to Porto flight tickets
Delta
Oct 19
DCA5:00 pmWashington, D.C. Reagan-National
12h 30m
1 stop
OPO10:30 amPorto
Oct 27
OPO5:00 amPorto
22h 04m
2 stops
DCA11:04 pmWashington, D.C. Reagan-National
$774
Delta
Oct 19
DCA3:05 pmWashington, D.C. Reagan-National
14h 25m
2 stops
OPO10:30 amPorto
Oct 27
OPO5:00 amPorto
22h 04m
2 stops
DCA11:04 pmWashington, D.C. Reagan-National
$778
Delta
Aug 19
DCA12:27 pmWashington, D.C. Reagan-National
15h 03m
2 stops
OPO8:30 amPorto
Sep 2
OPO5:00 amPorto
16h 29m
2 stops
DCA4:29 pmWashington, D.C. Reagan-National
$808

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 May 14, 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

Wed 10/28

11:59 am-7:40 am

2 stops15h 41m

Porto

Tue 11/3

8:20 am-6:51 pm

2 stops15h 31m

$755

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

$774

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 10/19

3:05 pm-10:30 am

2 stops14h 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

Sun 8/16

11:30 am-6:55 am

1 stop14h 25m

Porto

Tue 8/25

12:15 pm-9:46 am

2 stops26h 31m

$791

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 8/19

6:00 am-9:45 am

1 stop22h 45m

Porto

Wed 9/2

12:45 pm-3:38 pm

1 stop31h 53m

$792

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 10/28

10:00 am-9:30 am

1 stop19h 30m

Porto

Tue 11/3

12:35 pm-8:38 pm

1 stop13h 03m

$800

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 8/19

4:20 pm-7:00 am

1 stop9h 40m

Porto

Tue 9/1

12:15 pm-9:48 pm

1 stop14h 33m

$803

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sun 8/16

4:30 pm-9:45 am

1 stop12h 15m

Porto

Tue 8/25

12:15 pm-9:48 pm

1 stop14h 33m

$804

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 8/19

12:27 pm-8:30 am

2 stops15h 03m

Porto

Wed 9/2

5:00 am-4:29 pm

2 stops16h 29m

$808
Quickest round-trip

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Mon 8/17

4:20 pm-7:00 am

1 stop9h 40m

Porto

Fri 9/4

9:00 am-3:24 pm

1 stop11h 24m

$810

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 17% 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

10h 05m

Direct flights

None
The fastest flight from Washington, D.C. Reagan-National Airport to Porto takes 10h 05m
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

Frequently asked questions about flying from Washington, D.C. Reagan-National Airport to Porto

  • 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 10h 05m.

  • 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
9,711 reviews
Search United Airlines flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Braga
Aveiro
Matosinhos
Lamego
Esposende
Chaves
Pinhao
Espinho
Guimarães
Arcos de Valdevez
Viseu
Ponte de Lima
Curia
Penafiel
Mesao Frio
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.

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

momondo provides multiple filters to help you find the best flight to Porto from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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