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District of Columbia

$337+ Cheap flights from Porto (OPO) to District of Columbia

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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — IAD
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Porto to District of Columbia

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

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.
Thu 2/126:00 am
OPO
-
IAD
1 stop13h 35m
Lufthansa
Wed 2/2510:00 pm
IAD
-
OPO
1 stop12h 25m
Lufthansa
Deal found 1/27$440
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.
Fri 2/276:00 am
OPO
-
IAD
1 stop13h 35m
Lufthansa
Sun 3/157:00 pm
IAD
-
OPO
1 stop12h 40m
Lufthansa
Deal found 1/28$444
This Kiwi.com deal was found by Cheapflights users on 1/29. 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.
Sat 2/146:00 am
OPO
-
IAD
1 stop19h 15m
Lufthansa
Sat 2/285:15 pm
IAD
-
OPO
1 stop13h 25m
Lufthansa
Deal found 1/29$445
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.
Tue 4/215:05 am
OPO
-
IAD
1 stop15h 00m
TAP AIR PORTUGAL
Wed 4/2910:35 pm
IAD
-
OPO
1 stop16h 50m
TAP AIR PORTUGAL
Deal found 1/28$446
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.
Fri 3/66:00 am
OPO
-
IAD
1 stop14h 50m
Lufthansa
Tue 5/265:55 pm
IAD
-
OPO
1 stop16h 45m
Lufthansa
Deal found 1/28$448
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.
Thu 2/126:00 am
OPO
-
IAD
1 stop14h 50m
Multiple Airlines
Mon 2/165:45 pm
IAD
-
OPO
1 stop12h 30m
Multiple Airlines
Deal found 1/27$449
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/126:00 am
OPO
-
IAD
1 stop14h 50m
United Airlines
Wed 2/255:34 pm
IAD
-
OPO
1 stop10h 56m
United Airlines
Deal found 1/27$458
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:00 am
OPO
-
IAD
1 stop14h 50m
Multiple Airlines
Wed 3/45:45 pm
IAD
-
OPO
1 stop12h 30m
Multiple Airlines
Deal found 1/28$459
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.
Sat 2/146:00 am
OPO
-
IAD
1 stop19h 15m
United Airlines
Sat 2/288:36 am
IAD
-
OPO
1 stop19h 54m
United Airlines
Deal found 1/28$460
This Lufthansa 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/126:00 am
OPO
-
IAD
1 stop13h 35m
Lufthansa
Mon 2/165:27 pm
IAD
-
OPO
2 stops14h 23m
Lufthansa
Deal found 1/27$462
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:00 am
OPO
-
IAD
1 stop15h 05m
United Airlines
Sun 4/195:55 pm
IAD
-
OPO
1 stop12h 15m
United Airlines
Deal found 1/26$463
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:00 am
OPO
-
DCA
2 stops21h 43m
United Airlines
Sun 4/194:30 pm
DCA
-
OPO
1 stop12h 15m
United Airlines
Deal found 1/26$467

Find flight deals from Porto to District of Columbia

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

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$440
(Kiwi.com)

One-way from

$337
(Kiwi.com)

Popular in

August

Cheapest in

June

Average price

$580
Provider with most accurate pricing for Porto-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Porto-Washington, D.C. (WAS) flights.
Search Deals
From Porto to District of Columbia
Search Deals
One-way flight from Porto to District of Columbia
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($11 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 Porto to District of Columbia 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 Porto to District of Columbia that are best for you.

Fly from

Porto

Fly to

District of Columbia

Route

Depart

Return

Price

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 2/12

6:00 am-2:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Wed 2/25

6:00 pm-11:40 am

1 stop12h 40m

$440

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Tue 4/21

9:00 am-3:05 pm

1 stop11h 05m

Washington, D.C. Dulles Intl

Wed 4/29

10:35 pm-7:00 pm

1 stop15h 25m

$445

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 2/14

6:00 am-8:15 pm

1 stop19h 15m

Washington, D.C. Dulles Intl

Sat 2/28

5:15 pm-11:40 am

1 stop13h 25m

$445

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 3/6

6:00 am-3:50 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Tue 5/26

5:55 pm-3:40 pm

1 stop16h 45m

$448

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 2/14

6:00 am-8:15 pm

1 stop19h 15m

Washington, D.C. Dulles Intl

Sat 2/28

8:36 am-9:30 am

1 stop19h 54m

$460

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 2/12

6:00 am-2:35 pm

1 stop13h 35m

Washington, D.C. Dulles Intl

Mon 2/16

5:27 pm-12:50 pm

2 stops14h 23m

$462

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 4/16

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sun 4/19

5:55 pm-11:10 am

1 stop12h 15m

$463

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 2/16

5:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Sun 3/1

6:50 pm-10:30 am

1 stop10h 40m

$464

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 3/6

6:00 am-8:26 pm

2 stops43h 26m

Washington, D.C. Dulles Intl

Tue 5/26

8:20 pm-7:55 am

1 stop30h 35m

$467

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Wed 4/15

6:00 am-10:43 pm

2 stops21h 43m

Washington, D.C. Reagan-National

Sun 4/19

4:30 pm-9:45 am

1 stop12h 15m

$467

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 33 results
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Best time to book a flight from Porto to District of Columbia

Have a flexible travel schedule? Discover the best time to fly to District of Columbia from Porto 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 Porto to District of Columbia

How much does it cost to fly round-trip from Porto to District of Columbia?

Reviews of airlines servicing District of Columbia

Get insights into the airlines that provide service to District of Columbia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to District of Columbia. Reviews last updated January 29, 2026.
Peruse reviews from past customers who have flown with TAP AIR PORTUGAL from Porto to District of Columbia to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
TAP AIR PORTUGAL
7.1
Good
2,130 reviews

Crew

7.8

Boarding

7.0

Comfort

7.1

Entertainment

6.3

Food

6.2

Overall

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

LIS - EWR

Both flights returning to newirk airport was delayed by over a hour with minimum early notification
TAP AIR PORTUGAL
7.1
Good
2,130 reviews
TAP AIR PORTUGAL
7.1
Good
2,130 reviews

Crew

7.8

Boarding

7.0

Comfort

7.1

Entertainment

6.3

Food

6.2

Overall

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

LIS - EWR

Both flights returning to newirk airport was delayed by over a hour with minimum early notification

Related info for your journey

Find useful and relevant information for your journey from Porto to District of Columbia. 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 from for flights from Porto to District of Columbia?

    For a flight from Porto to District of Columbia, you will be flying from Porto. Porto (OPO) is just 6.8 mi from the center of the city.

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

    There are many flights that can get you from Porto to District of Columbia in 11h 05m. Fly via Lufthansa, TAP AIR PORTUGAL, or United Airlines to get the fastest option. There are 3537 mi between Porto and District of Columbia. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $331. British Airways flights start at $392 while deals on TAP AIR PORTUGAL start at $400 one-way.

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

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

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

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

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

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

See more FAQs

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Alternative routes for Porto to District of Columbia

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Top airline flying from Porto to District of Columbia

Discover the top airline that operate flights from Porto to District of Columbia. 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
TAP AIR PORTUGALCheapest$492Average$751FlexibilityNo cancel feeOn-timeN/A

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