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Cheap flights from Washington, D.C. Reagan-National Airport to Porto from $359

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 9/3. 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

American Airlines Logo
12:59 pm - 7:35 amDCA-OPO
13h 36m2 stops
American Airlines Logo
8:15 am - 7:14 pmOPO-DCA
15h 59m2 stops
$559American Airlines
Find Deal
mié., oct. 15 - mié., oct. 22
United Airlines Logo
3:30 pm - 3:45 pmDCA-OPO
19h 15m2 stops
United Airlines Logo
12:35 pm - 8:38 pmOPO-DCA
13h 03m1 stop
$570United Airlines
Find Deal
jue., oct. 23 - mar., nov. 4
United Airlines Logo
7:00 pm - 9:45 amDCA-OPO
9h 45m1 stop
United Airlines Logo
6:00 am - 7:03 pmOPO-DCA
18h 03m2 stops
$590United Airlines
Find Deal
dom., oct. 12 - mar., oct. 21
Air Canada Logo
12:55 pm - 9:35 amDCA-OPO
39h 40m2 stops
Air Canada Logo
12:10 pm - 3:51 pmOPO-DCA
32h 41m1 stop
$599Air Canada
Find Deal
dom., sep. 14 - jue., sep. 25
Logo
6:00 am - 11:10 amDCA-OPO
24h 10m2 stops
Logo
6:00 am - 10:35 pmOPO-DCA
21h 35m2 stops
$602
Find Deal
vie., nov. 7 - sáb., nov. 15
Air Canada Logo
8:40 pm - 9:35 amDCA-OPO
31h 55m2 stops
Air Canada Logo
12:50 pm - 9:51 pmOPO-DCA
14h 01m1 stop
$605Air Canada
Find Deal
dom., sep. 7 - mar., sep. 23
Iberia Logo
1:15 pm - 7:35 amDCA-OPO
13h 20m2 stops
Iberia Logo
8:35 pm - 10:57 pmOPO-DCA
31h 22m2 stops
$619Iberia
Find Deal
mié., oct. 1 - mié., oct. 8
Iberia Logo
1:39 pm - 7:35 amDCA-OPO
12h 56m2 stops
Iberia Logo
8:15 am - 7:00 pmOPO-DCA
15h 45m2 stops
$630Iberia
Find Deal
dom., sep. 7 - mar., sep. 23
Delta Logo
6:59 pm - 3:30 pmDCA-OPO
15h 31m2 stops
Delta Logo
9:20 am - 11:53 pmOPO-DCA
19h 33m2 stops
$648Delta
Find Deal
mar., sep. 2 - vie., sep. 12
Delta Logo
11:00 am - 10:40 amDCA-OPO
18h 40m2 stops
Delta Logo
4:20 pm - 10:05 amOPO-DCA
22h 45m2 stops
$660Delta
Find Deal
mar., sep. 9 - mar., sep. 16

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

Our best Iberia deals on Washington, D.C. Reagan-National Airport to Porto flight tickets
Iberia
Oct 1
DCA1:15 pmWashington, D.C. Reagan-National
13h 20m
2 stops
OPO7:35 amPorto
Oct 8
OPO8:35 pmPorto
31h 22m
2 stops
DCA10:57 pmWashington, D.C. Reagan-National
$619
Find similar
Iberia
Sep 7
DCA1:39 pmWashington, D.C. Reagan-National
12h 56m
2 stops
OPO7:35 amPorto
Sep 23
OPO8:15 amPorto
15h 45m
2 stops
DCA7:00 pmWashington, D.C. Reagan-National
$630
Find similar
Iberia
Sep 16
DCA1:39 pmWashington, D.C. Reagan-National
12h 56m
2 stops
OPO7:35 amPorto
Sep 22
OPO8:15 amPorto
19h 52m
2 stops
DCA11:07 pmWashington, D.C. Reagan-National
$754
Find similar

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
Sep 2
DCA6:59 pmWashington, D.C. Reagan-National
15h 31m
2 stops
OPO3:30 pmPorto
Sep 12
OPO9:20 amPorto
19h 33m
2 stops
DCA11:53 pmWashington, D.C. Reagan-National
$648
Find similar
Delta
Sep 9
DCA11:00 amWashington, D.C. Reagan-National
18h 40m
2 stops
OPO10:40 amPorto
Sep 16
OPO4:20 pmPorto
22h 45m
2 stops
DCA10:05 amWashington, D.C. Reagan-National
$660
Find similar
Delta
Oct 2
DCA5:00 pmWashington, D.C. Reagan-National
17h 30m
2 stops
OPO3:30 pmPorto
Oct 10
OPO6:40 amPorto
16h 20m
2 stops
DCA6:00 pmWashington, D.C. Reagan-National
$706
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 agosto 21, 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

mié. 10/15

12:59 pm-7:35 am

2 stops13h 36m

Porto

mié. 10/22

8:15 am-7:14 pm

2 stops15h 59m

$559

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

jue. 10/23

3:30 pm-3:45 pm

2 stops19h 15m

Porto

mar. 11/4

12:35 pm-8:38 pm

1 stop13h 03m

$570

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

dom. 10/12

7:00 pm-9:45 am

1 stop9h 45m

Porto

mar. 10/21

6:00 am-7:03 pm

2 stops18h 03m

$590

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

dom. 9/14

12:55 pm-9:35 am

2 stops39h 40m

Porto

jue. 9/25

12:10 pm-3:51 pm

1 stop32h 41m

$599

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

vie. 11/7

6:00 am-11:10 am

2 stops24h 10m

Porto

sáb. 11/15

6:00 am-10:35 pm

2 stops21h 35m

$602

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

dom. 9/7

8:40 pm-9:35 am

2 stops31h 55m

Porto

mar. 9/23

12:50 pm-9:51 pm

1 stop14h 01m

$605

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mié. 10/1

1:15 pm-7:35 am

2 stops13h 20m

Porto

mié. 10/8

8:35 pm-10:57 pm

2 stops31h 22m

$619

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

dom. 9/7

1:39 pm-7:35 am

2 stops12h 56m

Porto

mar. 9/23

8:15 am-7:00 pm

2 stops15h 45m

$630

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mar. 9/2

6:59 pm-3:30 pm

2 stops15h 31m

Porto

vie. 9/12

9:20 am-11:53 pm

2 stops19h 33m

$648

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mar. 9/9

11:00 am-10:40 am

2 stops18h 40m

Porto

mar. 9/16

4:20 pm-10:05 am

2 stops22h 45m

$660

Flights are sorted by cheapest round-trip flights 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.

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
8,930 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
Aveiro
Coimbra
Braga
Matosinhos
Caminha
Guimarães
Lamego
Esposende
Chaves
Arcos de Valdevez
Espinho
Viseu
Ponte de Lima
Pinhao
Santa Maria da Feira
Curia
Penafiel
Mesao Frio
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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