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Cheap flights from Washington, D.C. Reagan-National Airport to Porto from $394

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 11/26. 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.
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
Air Canada Logo
4:10 pm - 11:40 amDCA-OPO
38h 30m2 stops
Air Canada Logo
6:00 am - 7:45 pmOPO-DCA
42h 45m2 stops
$496Air Canada
Find Deal
Sat, Jan 17 - Tue, Jan 27
Delta Logo
4:50 pm - 3:25 pmDCA-OPO
17h 35m2 stops
Delta Logo
11:15 am - 10:56 pmOPO-DCA
16h 41m2 stops
$497Delta
Find Deal
Mon, Nov 3 - Tue, Nov 11
Delta Logo
2:30 pm - 10:30 amDCA-OPO
15h 00m2 stops
Delta Logo
11:20 am - 11:08 pmOPO-DCA
16h 48m2 stops
$498Delta
Find Deal
Wed, Jan 14 - Fri, Jan 23
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
Find Deal
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
Find Deal
Sun, Feb 1 - Sat, Feb 21
United Airlines Logo
6:20 pm - 9:30 amDCA-OPO
10h 10m1 stop
United Airlines Logo
6:00 am - 7:07 pmOPO-DCA
18h 07m2 stops
$509United Airlines
Find Deal
Fri, Nov 28 - Fri, Dec 5
Multiple Airlines Logo
4:10 pm - 11:40 amDCA-OPO
38h 30m2 stops
Multiple Airlines Logo
6:00 am - 8:55 amOPO-DCA
31h 55m2 stops
$521Multiple Airlines
Find Deal
Sat, Jan 17 - Sun, Jan 25

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
Nov 23
DCA6:00 pmWashington, D.C. Reagan-National
10h 30m
1 stop
OPO9:30 amPorto
Dec 2
OPO12:30 pmPorto
38h 26m
2 stops
DCA9:56 pmWashington, D.C. Reagan-National
$493
Find similar
United Airlines
Nov 12
DCA6:00 pmWashington, D.C. Reagan-National
10h 30m
1 stop
OPO9:30 amPorto
Nov 19
OPO12:35 pmPorto
12h 00m
1 stop
DCA7:35 pmWashington, D.C. Reagan-National
$494
Find similar
United Airlines
Nov 28
DCA6:20 pmWashington, D.C. Reagan-National
10h 10m
1 stop
OPO9:30 amPorto
Dec 5
OPO6:00 amPorto
18h 07m
2 stops
DCA7:07 pmWashington, D.C. Reagan-National
$509
Find similar

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
Jan 17
DCA4:10 pmWashington, D.C. Reagan-National
38h 30m
2 stops
OPO11:40 amPorto
Jan 27
OPO6:00 amPorto
42h 45m
2 stops
DCA7:45 pmWashington, D.C. Reagan-National
$496
Find similar
Air Canada
Nov 22
DCA8:40 pmWashington, D.C. Reagan-National
37h 35m
2 stops
OPO3:15 pmPorto
Dec 2
OPO6:00 amPorto
21h 35m
2 stops
DCA10:35 pmWashington, D.C. Reagan-National
$501
Find similar
Air Canada
Feb 1
DCA6:00 amWashington, D.C. Reagan-National
25h 50m
2 stops
OPO12:50 pmPorto
Feb 21
OPO6:00 amPorto
31h 55m
2 stops
DCA8:55 amWashington, D.C. Reagan-National
$508
Find similar

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 October 14, 2025.
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

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

Sat 1/17

4:10 pm-11:40 am

2 stops38h 30m

Porto

Tue 1/27

6:00 am-7:45 pm

2 stops42h 45m

$496

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

11:15 am-10:56 pm

2 stops16h 41m

$497

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Wed 1/14

2:30 pm-10:30 am

2 stops15h 00m

Porto

Fri 1/23

11:20 am-11:08 pm

2 stops16h 48m

$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

6:20 pm-9:30 am

1 stop10h 10m

Porto

Fri 12/5

6:00 am-7:07 pm

2 stops18h 07m

$509

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Sat 1/17

4:10 pm-11:40 am

2 stops38h 30m

Porto

Sun 1/25

6:00 am-8:55 am

2 stops31h 55m

$521

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

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

The cheapest day to depart on your flight to Porto is on a Sunday when prices can be found for as low as $613. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $779. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

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

In the afternoon is the cheapest time of day to fly from Washington, D.C. Reagan-National Airport to Porto when you can find flight prices for as low as $698. Flying to Porto in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $836 on average. Flights to Porto from Washington, D.C. Reagan-National Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You could potentially save up to 29% 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

Direct flights

None
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.
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  • 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 9h 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
8,976 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
Aveiro
Braga
Matosinhos
Caminha
Esposende
Lamego
Guimarães
Chaves
Espinho
Viseu
Ponte de Lima
Arcos de Valdevez
Pinhao
Curia
Penafiel
Mesao Frio
Mira
Baiao

Why use momondo?

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

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

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.

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

Yes. momondo can track prices for Washington, D.C. to Porto flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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