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Cheap flights from Porto to Washington, D.C. from $379

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 6/17. 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 Porto to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
11:00 am - 8:35 pm
OPO
-
IAD
14h 35m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 3:00 pm
IAD
-
OPO
11h 25m
1 stop
$520TAP AIR PORTUGAL
Mon, Apr 13 - Sun, Apr 26
TAP AIR PORTUGAL Logo
10:30 pm - 3:10 pm
OPO
-
IAD
21h 40m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 3:00 pm
IAD
-
OPO
11h 25m
1 stop
$545TAP AIR PORTUGAL
Mon, Apr 13 - Sun, Apr 26
TAP AIR PORTUGAL Logo
10:30 pm - 3:10 pm
OPO
-
IAD
21h 40m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 3:00 pm
IAD
-
OPO
11h 25m
1 stop
$549TAP AIR PORTUGAL
Mon, Apr 13 - Sun, Apr 26
TAP AIR PORTUGAL Logo
7:00 am - 3:10 pm
OPO
-
IAD
13h 10m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 8:25 pm
IAD
-
OPO
16h 50m
1 stop
$560TAP AIR PORTUGAL
Fri, Apr 17 - Sat, Apr 25
TAP AIR PORTUGAL Logo
7:00 am - 3:10 pm
OPO
-
IAD
13h 10m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 5:00 pm
IAD
-
OPO
13h 25m
1 stop
$570TAP AIR PORTUGAL
Fri, Apr 17 - Mon, Apr 27
TAP AIR PORTUGAL Logo
7:00 am - 3:10 pm
OPO
-
IAD
13h 10m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 3:00 pm
IAD
-
OPO
11h 25m
1 stop
$588TAP AIR PORTUGAL
Fri, Apr 17 - Sun, Apr 26
Lufthansa Logo
6:00 am - 4:05 pm
OPO
-
IAD
15h 05m
1 stop
Lufthansa Logo
10:20 pm - 11:25 pm
IAD
-
OPO
20h 05m
1 stop
$605Lufthansa
Thu, Apr 2 - Thu, Apr 16
TAP AIR PORTUGAL Logo
9:15 pm - 3:10 pm
OPO
-
IAD
22h 55m
1 stop
TAP AIR PORTUGAL Logo
10:35 pm - 7:00 pm
IAD
-
OPO
15h 25m
1 stop
$614TAP AIR PORTUGAL
Sat, Apr 18 - Sat, Apr 25
SWISS Logo
8:40 am - 4:45 pm
OPO
-
IAD
13h 05m
1 stop
SWISS Logo
8:20 pm - 7:55 am
IAD
-
OPO
30h 35m
1 stop
$620SWISS
Fri, May 1 - Fri, May 8
Lufthansa Logo
6:00 am - 3:05 pm
OPO
-
IAD
14h 05m
1 stop
Lufthansa Logo
5:55 pm - 11:15 am
IAD
-
OPO
12h 20m
1 stop
$624Lufthansa
Tue, May 19 - Sun, May 31

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

Our best Lufthansa deals on Porto to Washington, D.C. Dulles Intl Airport flight tickets
Lufthansa
Apr 2
OPO6:00 amPorto
15h 05m
1 stop
IAD4:05 pmWashington, D.C. Dulles Intl
Apr 16
IAD10:20 pmWashington, D.C. Dulles Intl
20h 05m
1 stop
OPO11:25 pmPorto
$605
Lufthansa
May 19
OPO6:00 amPorto
14h 05m
1 stop
IAD3:05 pmWashington, D.C. Dulles Intl
May 31
IAD5:55 pmWashington, D.C. Dulles Intl
12h 20m
1 stop
OPO11:15 amPorto
$624
Lufthansa
May 18
OPO6:20 amPorto
18h 05m
1 stop
IAD7:25 pmWashington, D.C. Dulles Intl
Jun 8
IAD5:55 pmWashington, D.C. Dulles Intl
12h 20m
1 stop
OPO11:15 amPorto
$684

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
May 1
OPO8:40 amPorto
13h 05m
1 stop
IAD4:45 pmWashington, D.C. Dulles Intl
May 8
IAD8:20 pmWashington, D.C. Dulles Intl
30h 35m
1 stop
OPO7:55 amPorto
$620
SWISS
May 19
OPO8:40 amPorto
13h 05m
1 stop
IAD4:45 pmWashington, D.C. Dulles Intl
Jun 9
IAD8:20 pmWashington, D.C. Dulles Intl
30h 35m
1 stop
OPO7:55 amPorto
$657

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 March 21, 2026.
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

Cheapest round-trip

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 4/13

11:00 am-8:35 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Sun 4/26

10:35 pm-3:00 pm

1 stop11h 25m

$520

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 4/13

10:30 pm-3:10 pm

1 stop21h 40m

Washington, D.C. Dulles Intl

Sun 4/26

10:35 pm-3:00 pm

1 stop11h 25m

$545

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 4/13

10:30 pm-3:10 pm

1 stop21h 40m

Washington, D.C. Dulles Intl

Sun 4/26

10:35 pm-3:00 pm

1 stop11h 25m

$549

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 4/17

7:00 am-3:10 pm

1 stop13h 10m

Washington, D.C. Dulles Intl

Sat 4/25

10:35 pm-8:25 pm

1 stop16h 50m

$560

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 4/17

7:00 am-3:10 pm

1 stop13h 10m

Washington, D.C. Dulles Intl

Mon 4/27

10:35 pm-5:00 pm

1 stop13h 25m

$570
Quickest round-trip

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 4/17

7:00 am-3:10 pm

1 stop13h 10m

Washington, D.C. Dulles Intl

Sun 4/26

10:35 pm-3:00 pm

1 stop11h 25m

$588

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 4/2

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Thu 4/16

10:20 pm-11:25 pm

1 stop20h 05m

$605

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 4/18

9:15 pm-3:10 pm

1 stop22h 55m

Washington, D.C. Dulles Intl

Sat 4/25

10:35 pm-7:00 pm

1 stop15h 25m

$614

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 5/1

8:40 am-4:45 pm

1 stop13h 05m

Washington, D.C. Dulles Intl

Fri 5/8

8:20 pm-7:55 am

1 stop30h 35m

$620

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 5/19

6:00 am-3:05 pm

1 stop14h 05m

Washington, D.C. Dulles Intl

Sun 5/31

5:55 pm-11:15 am

1 stop12h 20m

$624

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 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 airline that flies from Porto to Washington, D.C. Dulles Intl?

Iberia is the most popular carrier operating from Porto to Washington, D.C. Dulles Intl

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

Fastest flight time

15h 05m

Direct flights

None
The fastest flight from Porto to Washington, D.C. Dulles Intl Airport takes 15h 05m
There are no direct flights from Porto to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from Porto to 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 15h 05m.

  • 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
2,169 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
National Harbor
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Arlington
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Laurel
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Gaithersburg
Silver Spring
Fredericksburg
Rockville
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Manassas
Springfield
Linthicum Heights
Bethesda
Sterling

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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.

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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.

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