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$264+ Cheap flights from District of Columbia to Porto (OPO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — OPO
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from District of Columbia to Porto

Cheapest flights from District of Columbia to Porto
Explore the most affordable flight options available from District of Columbia to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This oojo deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1210:35 pm
IAD
-
OPO
1 stop11h 55m
TAP AIR PORTUGAL
Wed 4/2910:00 am
OPO
-
IAD
1 stop15h 35m
TAP AIR PORTUGAL
Deal found 1/28$372
This Mytrip deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/245:30 pm
IAD
-
OPO
1 stop11h 40m
TAP AIR PORTUGAL
Tue 3/36:55 am
OPO
-
IAD
1 stop12h 40m
TAP AIR PORTUGAL
Deal found 1/27$379
This oojo deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1810:30 pm
IAD
-
OPO
1 stop9h 35m
TAP AIR PORTUGAL
Tue 2/2410:15 pm
OPO
-
IAD
1 stop27h 45m
TAP AIR PORTUGAL
Deal found 1/28$380
This Kiwi.com deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/811:30 pm
IAD
-
OPO
1 stop11h 50m
TAP AIR PORTUGAL
Wed 3/2510:00 am
OPO
-
IAD
1 stop16h 00m
TAP AIR PORTUGAL
Deal found 1/27$398
This Kiwi.com deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/166:30 pm
IAD
-
OPO
1 stop11h 30m
TAP AIR PORTUGAL
Thu 3/267:00 am
OPO
-
IAD
1 stop13h 15m
TAP AIR PORTUGAL
Deal found 1/27$399
This Kiwi.com deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/166:30 pm
IAD
-
OPO
1 stop11h 30m
TAP AIR PORTUGAL
Wed 3/252:00 pm
OPO
-
IAD
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 1/28$404
This oojo deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/175:30 pm
IAD
-
OPO
1 stop14h 40m
TAP AIR PORTUGAL
Mon 2/234:10 pm
OPO
-
IAD
1 stop27h 25m
TAP AIR PORTUGAL
Deal found 1/26$425
This oojo deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/75:05 pm
IAD
-
OPO
1 stop10h 55m
TAP AIR PORTUGAL
Wed 4/1510:25 pm
OPO
-
IAD
1 stop21h 40m
TAP AIR PORTUGAL
Deal found 1/27$456
This oojo deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2810:30 pm
IAD
-
OPO
1 stop15h 30m
TAP AIR PORTUGAL
Wed 2/42:00 pm
OPO
-
IAD
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 1/27$461
This oojo deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/175:30 pm
IAD
-
OPO
1 stop11h 40m
TAP AIR PORTUGAL
Tue 2/2410:15 pm
OPO
-
IAD
1 stop27h 45m
TAP AIR PORTUGAL
Deal found 1/27$468
This FlightHub deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/55:40 pm
IAD
-
OPO
1 stop12h 15m
TAP AIR PORTUGAL
Wed 4/1511:00 am
OPO
-
IAD
1 stop14h 35m
TAP AIR PORTUGAL
Deal found 1/28$473
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:00 pm
DCA
-
OPO
1 stop11h 45m
United Airlines
Tue 10/2712:30 pm
OPO
-
DCA
2 stops33h 37m
United Airlines
Deal found 1/28$572

Find flight deals from District of Columbia to Porto

Keep the following information in mind while searching for District of Columbia to Porto flight deals. Data was last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$372
(oojo)

One-way from

$264
(oojo)

Popular in

June

Cheapest in

January

Average price

$589
Provider with most accurate pricing for Washington, D.C. (WAS)-Porto flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Porto flights.
Search Deals
From District of Columbia to Porto
Search Deals
One-way flight from District of Columbia to Porto
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from District of Columbia 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, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from District of Columbia to Porto that are best for you.

Fly from

District of Columbia

Fly to

Porto

Route

Depart

Return

Price

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Thu 4/30

9:45 pm-9:50 pm

1 stop19h 05m

Porto

Fri 5/8

5:00 am-3:35 pm

1 stop15h 35m

$564

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 3/10

7:50 pm-10:30 am

1 stop10h 40m

Porto

Fri 3/20

5:00 am-5:05 pm

1 stop16h 05m

$575

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 3/11

7:50 pm-10:30 am

1 stop10h 40m

Porto

Mon 3/23

11:15 am-5:05 pm

1 stop33h 50m

$575

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 3/11

7:50 pm-10:30 am

1 stop10h 40m

Porto

Thu 3/26

5:00 am-5:05 pm

1 stop16h 05m

$575

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Tue 3/10

7:50 pm-10:30 am

1 stop10h 40m

Porto

Tue 3/24

11:15 am-5:05 pm

1 stop33h 50m

$575

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 3/11

1:19 pm-10:30 am

2 stops17h 11m

Porto

Mon 3/23

11:15 am-5:05 pm

1 stop33h 50m

$579

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Mon 3/9

1:19 pm-10:30 am

2 stops17h 11m

Porto

Thu 3/26

5:00 am-5:05 pm

1 stop16h 05m

$579

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 3/11

1:19 pm-10:30 am

2 stops17h 11m

Porto

Fri 3/20

5:00 am-5:05 pm

1 stop16h 05m

$579

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Wed 3/18

1:19 pm-10:30 am

2 stops17h 11m

Porto

Tue 3/24

5:00 am-5:05 pm

1 stop16h 05m

$579

Washington, D.C.Porto

IAD - OPO

IADOPO

Washington, D.C. Dulles Intl

Sun 4/12

9:45 pm-10:00 pm

1 stop19h 15m

Porto

Wed 4/29

5:00 am-4:15 pm

2 stops16h 15m

$584

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 44 results
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Best time to book a flight from District of Columbia to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from District of Columbia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from District of Columbia to Porto

What is the cheapest month to book a flight from District of Columbia to Porto?

Currently, December is the cheapest month in which you can book a flight from District of Columbia to Porto (average of $357). Flying from District of Columbia to Porto in June is currently the most expensive (average of $687). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from District of Columbia to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto from District of Columbia?

    Porto (OPO) is the airport you will fly into if you book a flight from District of Columbia to Porto. It is only a 6.8 mi journey from Porto (OPO) to Porto’s city center.

  • How long is the flight from District of Columbia to Porto?

    For as low as $575, KLM can have you in Porto from District of Columbia in 10h 40m. There are 3537 mi between District of Columbia and Porto. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from District of Columbia to Porto one-way?

    $222 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $256 and $260, respectively.

  • Can I find deals for flights from District of Columbia to Porto that include hotel bookings?

    Yes. In addition to deals on District of Columbia to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from District of Columbia to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from District of Columbia to Porto.

  • Can I find deals for business class flights from District of Columbia to Porto?

    Yes. Cheapflights offers flight deals from District of Columbia to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from District of Columbia to Porto?

    Currently, December is the cheapest month in which you can book a flight from District of Columbia to Porto (average of $357). Flying from District of Columbia to Porto in June is currently the most expensive (average of $687). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Aveiro
Arcos de Valdevez
Coimbra

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Alternative routes for District of Columbia to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from District of Columbia to Porto

Discover the top 7 airlines that operate flights from District of Columbia to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$439Average$788FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$444Average$681FlexibilityNo cancel feeOn-time79%
KLMCheapest$477Average$731FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$494Average$839FlexibilityNo cancel feeOn-time69%
TAP AIR PORTUGALCheapest$496Average$760FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$514Average$691FlexibilityNo cancel feeOn-time76%
IberiaCheapest$515Average$672FlexibilityNo cancel feeOn-time77%

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