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Cheap flights from Washington, D.C. to Porto from $214

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. to Porto departing on 2/18. 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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0 bags

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Find the cheapest flights from Washington, D.C. to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
5:40 pm - 1:15 pm
IAD
-
OPO
14h 35m1 stop
Lufthansa Logo
6:00 am - 2:35 pm
OPO
-
IAD
13h 35m1 stop
$442Lufthansa
mié., feb. 25 - mié., mar. 4
TAP AIR PORTUGAL Logo
5:05 pm - 9:00 am
IAD
-
OPO
10h 55m1 stop
TAP AIR PORTUGAL Logo
9:00 am - 3:05 pm
OPO
-
IAD
11h 05m1 stop
$462TAP AIR PORTUGAL
mar., abr. 14 - dom., abr. 19
Multiple Airlines Logo
5:45 pm - 12:05 pm
IAD
-
OPO
13h 20m1 stop
Multiple Airlines Logo
1:45 pm - 3:35 pm
OPO
-
IAD
30h 50m1 stop
$465Multiple Airlines
dom., ene. 18 - lun., feb. 2
Multiple Airlines Logo
9:45 am - 12:05 pm
IAD
-
OPO
21h 20m2 stops
Multiple Airlines Logo
6:00 am - 3:50 pm
OPO
-
IAD
14h 50m1 stop
$467Multiple Airlines
mié., feb. 18 - mié., feb. 25
United Airlines Logo
8:10 pm - 9:30 am
DCA
-
OPO
9h 20m1 stop
United Airlines Logo
6:00 am - 8:53 am
OPO
-
DCA
31h 53m2 stops
$490United Airlines
mar., mar. 24 - mar., mar. 31
United Airlines Logo
10:30 am - 9:30 am
BWI
-
OPO
18h 00m2 stops
United Airlines Logo
6:00 am - 9:17 pm
OPO
-
BWI
20h 17m2 stops
$492United Airlines
mié., feb. 25 - mié., mar. 4
Delta Logo
7:24 am - 10:30 am
BWI
-
OPO
23h 06m2 stops
Delta Logo
11:45 am - 10:10 pm
OPO
-
BWI
39h 25m2 stops
$497Delta
dom., mar. 22 - mar., mar. 31
Delta Logo
6:30 pm - 3:25 pm
DCA
-
OPO
15h 55m2 stops
Delta Logo
5:00 am - 10:50 pm
OPO
-
DCA
22h 50m2 stops
$497Delta
mar., abr. 7 - jue., abr. 16
Air Canada Logo
6:00 am - 6:30 pm
DCA
-
OPO
31h 30m2 stops
Air Canada Logo
8:40 am - 7:53 pm
OPO
-
DCA
16h 13m2 stops
$500Air Canada
mié., abr. 8 - jue., abr. 23
KLM Logo
7:06 pm - 3:25 pm
BWI
-
OPO
15h 19m2 stops
KLM Logo
11:25 am - 10:53 pm
OPO
-
BWI
16h 28m2 stops
$511KLM
mié., feb. 18 - mié., feb. 25

KLM flights from Washington, D.C. to Porto

Our best KLM deals on Washington, D.C. to Porto flight tickets
KLM
Feb 11
IAD12:40 pmWashington, D.C. Dulles Intl
16h 50m
2 stops
OPO10:30 amPorto
Feb 17
OPO5:00 amPorto
16h 05m
1 stop
IAD4:05 pmWashington, D.C. Dulles Intl
$495
KLM
Feb 11
IAD12:40 pmWashington, D.C. Dulles Intl
16h 50m
2 stops
OPO10:30 amPorto
Feb 17
OPO5:00 amPorto
18h 37m
2 stops
IAD6:37 pmWashington, D.C. Dulles Intl
$505
KLM
Feb 18
BWI7:06 pmBaltimore/Washington
15h 19m
2 stops
OPO3:25 pmPorto
Feb 25
OPO11:25 amPorto
16h 28m
2 stops
BWI10:53 pmBaltimore/Washington
$511

United Airlines flights from Washington, D.C. to Porto

Our best United Airlines deals on Washington, D.C. to Porto flight tickets
United Airlines
Mar 23
IAD5:35 pmWashington, D.C. Dulles Intl
11h 55m
1 stop
OPO9:30 amPorto
Mar 31
OPO6:00 amPorto
14h 05m
1 stop
IAD3:05 pmWashington, D.C. Dulles Intl
$482
United Airlines
Mar 24
DCA8:10 pmWashington, D.C. Reagan-National
9h 20m
1 stop
OPO9:30 amPorto
Mar 31
OPO6:00 amPorto
31h 53m
2 stops
DCA8:53 amWashington, D.C. Reagan-National
$490
United Airlines
Feb 25
BWI10:30 amBaltimore/Washington
18h 00m
2 stops
OPO9:30 amPorto
Mar 4
OPO6:00 amPorto
20h 17m
2 stops
BWI9:17 pmBaltimore/Washington
$492

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 enero 8, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 2/25

5:40 pm-1:15 pm

1 stop14h 35m

Porto

mié. 3/4

6:00 am-2:35 pm

1 stop13h 35m

$442

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mar. 4/14

5:05 pm-9:00 am

1 stop10h 55m

Porto

dom. 4/19

9:00 am-3:05 pm

1 stop11h 05m

$462

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

dom. 1/18

5:45 pm-12:05 pm

1 stop13h 20m

Porto

lun. 2/2

1:45 pm-3:35 pm

1 stop30h 50m

$465

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

mié. 2/18

9:45 am-12:05 pm

2 stops21h 20m

Porto

mié. 2/25

6:00 am-3:50 pm

1 stop14h 50m

$467

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mar. 3/24

8:10 pm-9:30 am

1 stop9h 20m

Porto

mar. 3/31

6:00 am-8:53 am

2 stops31h 53m

$490

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

mié. 2/25

10:30 am-9:30 am

2 stops18h 00m

Porto

mié. 3/4

6:00 am-9:17 pm

2 stops20h 17m

$492

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

dom. 3/22

7:24 am-10:30 am

2 stops23h 06m

Porto

mar. 3/31

11:45 am-10:10 pm

2 stops39h 25m

$497

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mar. 4/7

6:30 pm-3:25 pm

2 stops15h 55m

Porto

jue. 4/16

5:00 am-10:50 pm

2 stops22h 50m

$497

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

mié. 4/8

6:00 am-6:30 pm

2 stops31h 30m

Porto

jue. 4/23

8:40 am-7:53 pm

2 stops16h 13m

$500

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

mié. 2/18

7:06 pm-3:25 pm

2 stops15h 19m

Porto

mié. 2/25

11:25 am-10:53 pm

2 stops16h 28m

$511

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 Porto from

How to get the cheapest flight ticket from Washington, D.C. 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 typical price of a round-trip flight between Washington, D.C. and Porto?

What is the cheapest month to fly to Porto?

The month of October is, on average, the cheapest month to fly to Porto from Washington, D.C., with most prices found around $593. If you aren’t able to travel during the month of October, then book flights to Porto from Washington, D.C. during February instead. Flights to Porto in February, while not as cheap as those in October, still average around $612.

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $710 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Washington, D.C. for as low as $649 on momondo.

Can stopping save me money on Washington, D.C. to Porto flights?

You could potentially save up to 3% on your flight if you consider stops on a Washington, D.C. to Porto flight.

How have Washington, D.C. to Porto flight prices changed over time?

When to book flights from Washington, D.C. to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. 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. to Porto (WAS to OPO) flight deals and tips

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

Fastest flight time

9h 20m

Direct flights

None
The fastest flight from Washington, D.C. to Porto takes 9h 20m
There are no direct flights from Washington, D.C. to Porto. There are no popular flight routes from Washington, D.C. to Porto.
Search flight deals

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

    The straight-line distance from Washington, D.C. to Porto is 3523.1 mi. By plane, this route typically takes 9h 20m.

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

    Prices for flights from Washington, D.C. to Porto Airport are refreshed on a daily basis.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. 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. to Porto?

Best airlines flying from Washington, D.C. to Porto

Compare and see reviews for airlines that fly from Washington, D.C. to Porto with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $439Free CancellationRating
7.9
8,032 reviews
Search Delta flights
SWISSPriceFrom $444Free CancellationRating
7.5
1,843 reviews
Search SWISS flights
KLMPriceFrom $477Free CancellationRating
7.7
1,434 reviews
Search KLM flights
United AirlinesPriceFrom $494Free CancellationRating
7.4
9,142 reviews
Search United Airlines flights
TAP AIR PORTUGALPriceFrom $499Free CancellationRating
7.1
2,111 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $515Free CancellationRating
7.0
3,079 reviews
Search Iberia flights
LufthansaPriceFrom $615Free CancellationRating
6.8
7,698 reviews
Search Lufthansa 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
Matosinhos
Aveiro
Esposende
Lamego
Guimarães
Chaves
Espinho
Viseu
Pinhao
Arcos de Valdevez
Ponte de Lima
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?

It is quick and easy to find Washington, D.C. to Porto flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Porto that suits you.

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

Flights from Washington, D.C. to Porto with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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?

If you are not ready to book a flight from Washington, D.C. to Porto now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Porto and let you know when they change.

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