Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Porto to Washington, D.C. from $337

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Porto to Washington, D.C. departing on 10/14. 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 Porto to Washington, D.C.

Cheap round-trip flights

TAP AIR PORTUGAL Logo
9:15 pm - 3:20 pmOPO-IAD
23h 05m1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 5:00 pmIAD-OPO
13h 25m1 stop
$478TAP AIR PORTUGAL
Find Deal
jue., sep. 4 - sáb., sep. 20
TAP AIR PORTUGAL Logo
9:15 pm - 3:20 pmOPO-IAD
23h 05m1 stop
TAP AIR PORTUGAL Logo
10:20 pm - 5:05 pmIAD-OPO
13h 45m1 stop
$482TAP AIR PORTUGAL
Find Deal
jue., sep. 18 - mié., oct. 1
Delta Logo
6:30 am - 3:35 pmOPO-IAD
14h 05m1 stop
Delta Logo
8:17 pm - 3:30 pmIAD-OPO
14h 13m2 stops
$551Delta
Find Deal
jue., sep. 4 - sáb., sep. 20
Delta Logo
6:30 am - 3:35 pmOPO-IAD
14h 05m1 stop
Delta Logo
8:17 pm - 3:30 pmIAD-OPO
14h 13m2 stops
$553Delta
Find Deal
jue., sep. 4 - sáb., sep. 20
Logo
8:20 pm - 3:35 pmOPO-IAD
24h 15m1 stop
Logo
9:20 pm - 8:25 amIAD-OPO
30h 05m1 stop
$560
Find Deal
jue., sep. 18 - mié., oct. 1
American Airlines Logo
8:15 am - 3:00 pmOPO-IAD
11h 45m1 stop
American Airlines Logo
4:35 pm - 7:35 amIAD-OPO
10h 00m1 stop
$564American Airlines
Find Deal
jue., sep. 18 - mié., oct. 1
Logo
6:00 am - 2:35 pmOPO-IAD
13h 35m1 stop
Logo
8:30 pm - 6:30 pmIAD-OPO
17h 00m1 stop
$566
Find Deal
lun., dic. 22 - mar., dic. 30
United Airlines Logo
6:00 am - 3:50 pmOPO-IAD
14h 50m1 stop
United Airlines Logo
6:00 pm - 3:05 pmIAD-OPO
16h 05m1 stop
$567United Airlines
Find Deal
mié., dic. 24 - sáb., ene. 3
American Airlines Logo
12:20 pm - 3:00 pmOPO-IAD
31h 40m1 stop
American Airlines Logo
4:35 pm - 11:40 amIAD-OPO
14h 05m1 stop
$568American Airlines
Find Deal
jue., sep. 4 - sáb., sep. 20
United Airlines Logo
6:00 am - 9:15 pmOPO-IAD
20h 15m2 stops
United Airlines Logo
6:00 pm - 3:05 pmIAD-OPO
16h 05m1 stop
$572United Airlines
Find Deal
mié., dic. 24 - sáb., ene. 3

American Airlines flights from Porto to Washington, D.C. Dulles Intl Airport

Our best American Airlines deals on Porto to Washington, D.C. Dulles Intl Airport flight tickets
American Airlines
Sep 18
OPO8:15 amPorto
11h 45m
1 stop
IAD3:00 pmWashington, D.C. Dulles Intl
Oct 1
IAD4:35 pmWashington, D.C. Dulles Intl
10h 00m
1 stop
OPO7:35 amPorto
$564
Find similar
American Airlines
Sep 4
OPO12:20 pmPorto
31h 40m
1 stop
IAD3:00 pmWashington, D.C. Dulles Intl
Sep 20
IAD4:35 pmWashington, D.C. Dulles Intl
14h 05m
1 stop
OPO11:40 amPorto
$568
Find similar

SWISS flights from Porto to Washington, D.C. Dulles Intl Airport

Our best SWISS deals on Porto to Washington, D.C. Dulles Intl Airport flight tickets
SWISS
Sep 18
OPO8:40 amPorto
12h 35m
1 stop
IAD4:15 pmWashington, D.C. Dulles Intl
Oct 1
IAD5:45 pmWashington, D.C. Dulles Intl
15h 00m
2 stops
OPO1:45 pmPorto
$610
Find similar
SWISS
Oct 10
OPO7:55 pmPorto
23h 30m
2 stops
IAD2:25 pmWashington, D.C. Dulles Intl
Oct 23
IAD5:45 pmWashington, D.C. Dulles Intl
15h 00m
2 stops
OPO1:45 pmPorto
$653
Find similar
SWISS
Sep 18
OPO7:20 pmPorto
23h 35m
2 stops
IAD1:55 pmWashington, D.C. Dulles Intl
Oct 1
IAD5:45 pmWashington, D.C. Dulles Intl
15h 00m
2 stops
OPO1:45 pmPorto
$663
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Porto to Washington, D.C. Dulles Intl Airport 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 julio 31, 2025.
Use the filters below to find and compare flights from Porto to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/4

9:15 pm-3:20 pm

1 stop23h 05m

Washington, D.C. Dulles Intl

sáb. 9/20

10:35 pm-5:00 pm

1 stop13h 25m

$478

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/18

9:15 pm-3:20 pm

1 stop23h 05m

Washington, D.C. Dulles Intl

mié. 10/1

10:20 pm-5:05 pm

1 stop13h 45m

$482

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/4

6:30 am-3:35 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

sáb. 9/20

8:17 pm-3:30 pm

2 stops14h 13m

$551

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/4

6:30 am-3:35 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

sáb. 9/20

8:17 pm-3:30 pm

2 stops14h 13m

$553

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/18

8:20 pm-3:35 pm

1 stop24h 15m

Washington, D.C. Dulles Intl

mié. 10/1

9:20 pm-8:25 am

1 stop30h 05m

$560

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/18

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

mié. 10/1

4:35 pm-7:35 am

1 stop10h 00m

$564

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

lun. 12/22

6:00 am-2:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

mar. 12/30

8:30 pm-6:30 pm

1 stop17h 00m

$566

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

mié. 12/24

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

sáb. 1/3

6:00 pm-3:05 pm

1 stop16h 05m

$567

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

jue. 9/4

12:20 pm-3:00 pm

1 stop31h 40m

Washington, D.C. Dulles Intl

sáb. 9/20

4:35 pm-11:40 am

1 stop14h 05m

$568

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

mié. 12/24

6:00 am-9:15 pm

2 stops20h 15m

Washington, D.C. Dulles Intl

sáb. 1/3

6:00 pm-3:05 pm

1 stop16h 05m

$572

Flights are sorted by cheapest round-trip flights first.

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

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Porto to Washington, D.C. Dulles Intl Airport

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 Washington, D.C. Dulles Intl Airport?

Our data shows that Monday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $581. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Porto to Washington, D.C. Dulles Intl Airport for around $942.

When to book flights from Porto to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Porto to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Porto to Washington, D.C. Dulles Intl Airport (OPO to IAD) flight deals and tips

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

Best Price Found

$337

Fastest flight time

11h 10m

Direct flights

None
The best one-way flight to Washington, D.C. Dulles Intl Airport from Porto in the past 72 hours is $337. The best round-trip flight deal from Porto to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $478.
The fastest flight from Porto to Washington, D.C. Dulles Intl Airport takes 11h 10m
There are no direct flights from Porto to Washington, D.C. Dulles Intl Airport. Popular non-direct route for this connection is Porto Airport - Washington, D.C. Dulles Intl Airport.
Search flight deals

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

    There are 3541.8 mi between Porto and Washington, D.C. Dulles Intl. A reasonable flight in good conditions will take 11h 20m.

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

    Prices for flights from Porto Airport to Washington, D.C. Dulles Intl Airport are updated daily.

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

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

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The necessary travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Porto to Washington, D.C. Dulles Intl Airport?

Best airlines flying from Porto to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Porto to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
TAP AIR PORTUGALPriceFrom $492Free CancellationRating
7.1
1,933 reviews
Search TAP AIR PORTUGAL flights

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Gettysburg
Arlington
National Harbor
Winchester
Woodbridge
Laurel
Tysons
Silver Spring
Waldorf
Fredericksburg
Manassas
Harpers Ferry
Towson
Rockville
Colonial Beach
Gaithersburg
Fairfax
Reston
Glen Burnie

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Porto to Washington, D.C.. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from Porto to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Porto to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Porto to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Washington, D.C. Dulles Intl Airport 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
mar. 8/5
mar. 8/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Washington, D.C.