Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Washington, D.C. to Porto from $248

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 1/13. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
1:45 pm - 3:35 pm
OPO
-
IAD
30h 50m1 stop
$449Lufthansa
Wed, Jan 21 - Wed, Jan 28
Lufthansa Logo
6:00 pm - 11:40 am
IAD
-
OPO
12h 40m1 stop
Lufthansa Logo
1:45 pm - 3:35 pm
OPO
-
IAD
30h 50m1 stop
$456Lufthansa
Mon, Jan 12 - Mon, Jan 26
Multiple Airlines Logo
9:45 am - 1:15 pm
IAD
-
OPO
22h 30m2 stops
Multiple Airlines Logo
6:00 am - 3:50 pm
OPO
-
IAD
14h 50m1 stop
$461Multiple Airlines
Wed, Feb 11 - Tue, Feb 17
Multiple Airlines Logo
9:45 am - 12:05 pm
IAD
-
OPO
21h 20m2 stops
Multiple Airlines Logo
12:05 pm - 4:40 pm
OPO
-
IAD
33h 35m1 stop
$462Multiple Airlines
Mon, Feb 16 - Mon, Feb 23
TAP AIR PORTUGAL Logo
5:30 pm - 10:00 pm
IAD
-
OPO
23h 30m1 stop
TAP AIR PORTUGAL Logo
4:10 pm - 2:35 pm
OPO
-
IAD
27h 25m1 stop
$472TAP AIR PORTUGAL
Mon, Jan 12 - Mon, Jan 26
Delta Logo
3:35 pm - 10:30 am
BWI
-
OPO
14h 55m2 stops
Delta Logo
11:45 am - 12:46 am
OPO
-
BWI
18h 01m2 stops
$492Delta
Tue, Mar 24 - Wed, Apr 1
KLM Logo
12:20 pm - 10:30 am
DCA
-
OPO
17h 10m2 stops
KLM Logo
5:00 am - 6:59 pm
OPO
-
DCA
18h 59m2 stops
$492KLM
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
6:00 pm - 9:30 am
DCA
-
OPO
10h 30m1 stop
United Airlines Logo
12:35 pm - 7:35 pm
OPO
-
DCA
12h 00m1 stop
$495United Airlines
Tue, Feb 24 - Tue, Mar 3
Delta Logo
5:36 pm - 3:25 pm
BWI
-
OPO
17h 49m2 stops
Delta Logo
5:00 am - 11:01 pm
OPO
-
BWI
22h 01m2 stops
$498Delta
Tue, Mar 10 - Tue, Mar 17
United Airlines Logo
7:30 am - 11:40 am
DCA
-
OPO
23h 10m2 stops
United Airlines Logo
12:35 pm - 7:35 pm
OPO
-
DCA
12h 00m1 stop
$514United Airlines
Tue, Feb 24 - Tue, Mar 3

Lufthansa flights from Washington, D.C. to Porto

Our best Lufthansa deals on Washington, D.C. to Porto flight tickets
Lufthansa
Jan 21
IAD5:40 pmWashington, D.C. Dulles Intl
14h 35m
1 stop
OPO1:15 pmPorto
Jan 28
OPO1:45 pmPorto
30h 50m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$449
Find similar
Lufthansa
Jan 12
IAD6:00 pmWashington, D.C. Dulles Intl
12h 40m
1 stop
OPO11:40 amPorto
Jan 26
OPO1:45 pmPorto
30h 50m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$456
Find similar
Lufthansa
Jan 14
IAD5:40 pmWashington, D.C. Dulles Intl
14h 35m
1 stop
OPO1:15 pmPorto
Jan 22
OPO6:00 amPorto
14h 50m
1 stop
IAD3:50 pmWashington, D.C. Dulles Intl
$475
Find similar

KLM flights from Washington, D.C. to Porto

Our best KLM deals on Washington, D.C. to Porto flight tickets
KLM
Feb 24
IAD12:38 pmWashington, D.C. Dulles Intl
16h 52m
2 stops
OPO10:30 amPorto
Mar 3
OPO5:00 amPorto
16h 05m
1 stop
IAD4:05 pmWashington, D.C. Dulles Intl
$482
Find similar
KLM
Mar 24
IAD7:59 pmWashington, D.C. Dulles Intl
15h 26m
2 stops
OPO3:25 pmPorto
Apr 1
OPO7:00 pmPorto
25h 35m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$487
Find similar
KLM
Mar 2
IAD7:32 pmWashington, D.C. Dulles Intl
14h 53m
2 stops
OPO3:25 pmPorto
Mar 9
OPO4:10 pmPorto
28h 55m
1 stop
IAD5:05 pmWashington, D.C. Dulles Intl
$488
Find similar

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 December 8, 2025.
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

Wed 1/21

5:40 pm-1:15 pm

1 stop14h 35m

Porto

Wed 1/28

1:45 pm-3:35 pm

1 stop30h 50m

$449

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 1/12

6:00 pm-11:40 am

1 stop12h 40m

Porto

Mon 1/26

1:45 pm-3:35 pm

1 stop30h 50m

$456

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 2/11

9:45 am-1:15 pm

2 stops22h 30m

Porto

Tue 2/17

6:00 am-3:50 pm

1 stop14h 50m

$461

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 2/16

9:45 am-12:05 pm

2 stops21h 20m

Porto

Mon 2/23

12:05 pm-4:40 pm

1 stop33h 35m

$462

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 1/12

5:30 pm-10:00 pm

1 stop23h 30m

Porto

Mon 1/26

4:10 pm-2:35 pm

1 stop27h 25m

$472

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 3/24

3:35 pm-10:30 am

2 stops14h 55m

Porto

Wed 4/1

11:45 am-12:46 am

2 stops18h 01m

$492

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 2/24

12:20 pm-10:30 am

2 stops17h 10m

Porto

Tue 3/3

5:00 am-6:59 pm

2 stops18h 59m

$492

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 2/24

6:00 pm-9:30 am

1 stop10h 30m

Porto

Tue 3/3

12:35 pm-7:35 pm

1 stop12h 00m

$495

BaltimorePorto

BWI - OPO

BWIOPO

Baltimore/Washington

Tue 3/10

5:36 pm-3:25 pm

2 stops17h 49m

Porto

Tue 3/17

5:00 am-11:01 pm

2 stops22h 01m

$498

Washington, D.C.Porto

DCA - OPO

DCAOPO

Washington, D.C. Reagan-National

Tue 2/24

7:30 am-11:40 am

2 stops23h 10m

Porto

Tue 3/3

12:35 pm-7:35 pm

1 stop12h 00m

$514

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 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 $594. 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 $613.

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. 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. at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $720 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 $663 on momondo.

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

You could potentially save up to 31% 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?

As of December 2025, prices for Washington, D.C. to Porto flights are approximately 15% more expensive when compared to flights at the same time last year.

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
8,011 reviews
Search Delta flights
United AirlinesPriceFrom $494Free CancellationRating
7.4
9,089 reviews
Search United Airlines flights
TAP AIR PORTUGALPriceFrom $505Free CancellationRating
7.1
2,085 reviews
Search TAP AIR PORTUGAL flights
IberiaPriceFrom $515Free CancellationRating
7.0
3,043 reviews
Search Iberia flights
KLMPriceFrom $555Free CancellationRating
7.7
1,431 reviews
Search KLM flights
LufthansaPriceFrom $615Free CancellationRating
6.8
7,618 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
Aveiro
Matosinhos
Guimarães
Esposende
Lamego
Chaves
Viseu
Espinho
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?

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.

An easier way to manage your Porto trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 1/7
Wed 1/14
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal