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District of Columbia

$339+ 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 12/18. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — IAD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find 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 October 30, 2025.

This Rumbo deal was found by Cheapflights users on 10/29. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/215:35 pmOPO - IAD
1 stop30h 15mScandinavian Airlines
Thu 12/48:30 pmIAD - OPO
1 stop15h 25mScandinavian Airlines
Deal found 10/29$519
This KLM deal was found by Cheapflights users on 10/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:30 amOPO - IAD
1 stop14h 35mKLM
Mon 12/16:50 pmIAD - OPO
1 stop10h 40mKLM
Deal found 10/29$572
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:30 amOPO - IAD
1 stop14h 35mDelta
Mon 12/16:50 pmIAD - OPO
1 stop10h 40mDelta
Deal found 10/29$573
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/216:30 amOPO - DCA
2 stops21h 26mDelta
Thu 12/411:13 amDCA - OPO
2 stops18h 12mDelta
Deal found 10/30$577
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:30 amOPO - DCA
2 stops21h 26mDelta
Mon 12/111:10 amDCA - OPO
2 stops18h 20mDelta
Deal found 10/29$578
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/226:00 amOPO - IAD
2 stops18h 08mDelta
Sun 4/56:30 pmIAD - OPO
1 stop16h 00mDelta
Deal found 10/29$578
This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/216:30 amOPO - IAD
1 stop14h 35mDelta
Thu 12/412:19 pmIAD - OPO
2 stops17h 11mDelta
Deal found 10/30$581
This Air France deal was found by Cheapflights users on 10/29. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:30 amOPO - DCA
2 stops15h 30mMultiple Airlines
Mon 12/12:59 pmDCA - OPO
2 stops14h 31mMultiple Airlines
Deal found 10/29$587
This Air Canada deal was found by Cheapflights users on 10/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/226:00 amOPO - IAD
2 stops43h 26mAir Canada
Sun 4/59:55 amIAD - OPO
2 stops27h 35mAir Canada
Deal found 10/29$591
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 12/188:40 amOPO - IAD
1 stop13h 00mSWISS
Tue 12/308:30 pmIAD - OPO
1 stop30h 20mSWISS
Deal found 10/30$592
This United Airlines deal was found by Cheapflights users on 10/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/246:00 amOPO - DCA
2 stops21h 42mUnited Airlines
Sun 11/306:05 pmDCA - OPO
1 stop10h 25mUnited Airlines
Deal found 10/29$614
This United Airlines deal was found by Cheapflights users on 10/28. 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.
Fri 11/712:35 pmOPO - DCA
1 stop13h 59mUnited Airlines
Sun 11/236:05 pmDCA - OPO
1 stop10h 25mUnited Airlines
Deal found 10/28$615

Cheap 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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$519
(Rumbo)

One-way from

$339
(Cheapflightsfares)

Popular in

January

Cheapest in

May

Average price

$684
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. 14% potential increase in price ($118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 30, 2025.
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

Fri 11/21

5:35 pm-6:50 pm

1 stop30h 15m

Washington, D.C. Dulles Intl

Thu 12/4

8:30 pm-4:55 pm

1 stop15h 25m

$519

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 11/22

6:00 am-4:05 pm

1 stop15h 05m

Washington, D.C. Dulles Intl

Sun 4/5

9:20 pm-3:30 pm

1 stop13h 10m

$572

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 11/24

6:30 am-4:05 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Mon 12/1

6:50 pm-10:30 am

1 stop10h 40m

$572

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 11/24

6:30 am-4:05 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Mon 12/1

6:50 pm-10:30 am

1 stop10h 40m

$573

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Fri 11/21

6:30 am-10:56 pm

2 stops21h 26m

Washington, D.C. Reagan-National

Thu 12/4

11:13 am-10:25 am

2 stops18h 12m

$577

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 11/24

6:30 am-10:56 pm

2 stops21h 26m

Washington, D.C. Reagan-National

Mon 12/1

11:10 am-10:30 am

2 stops18h 20m

$578

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 11/22

6:00 am-7:08 pm

2 stops18h 08m

Washington, D.C. Dulles Intl

Sun 4/5

6:30 pm-3:30 pm

1 stop16h 00m

$578

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 11/21

6:30 am-4:05 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Thu 12/4

12:19 pm-10:30 am

2 stops17h 11m

$582

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Mon 11/24

6:30 am-5:00 pm

2 stops15h 30m

Washington, D.C. Reagan-National

Mon 12/1

2:59 pm-10:30 am

2 stops14h 31m

$587

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 11/22

6:00 am-8:26 pm

2 stops43h 26m

Washington, D.C. Dulles Intl

Sun 4/5

9:55 am-6:30 pm

2 stops27h 35m

$591

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 38 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

What is the cheapest time of day to fly from OPO to DC?

Find hourly flight availability from Porto to District of Columbia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

It’s optimal to fly from Porto to District of Columbia in the afternoon. By choosing this option you can save up to 46% on the cost of your flight, compared to a flight at noon.

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 October 30, 2025.
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
2,040 reviews

Comfort

7.1

Food

6.2

Entertainment

6.3

Boarding

7.0

Overall

7.1

Crew

7.8

Reviews

1 / 20
6.0
Good

Delsy,Aug 2025

LIS - MIA

Boarding was a hassle. When I asked if my flight class had been assigned, the staff treated me poorly. The seats were small and very hard, and the temperature was extremely hot for about half of the flight. The food was good, but there wasn't enough chicken for the entire plane, so I only received pasta with no other options. The flight attendants were not friendly at all. Overall, for a group of 24 people, it was a very unpleasant experience.
TAP AIR PORTUGAL
7.1
Good
2,040 reviews
TAP AIR PORTUGAL
7.1
Good
2,040 reviews

Comfort

7.1

Food

6.2

Entertainment

6.3

Boarding

7.0

Overall

7.1

Crew

7.8

Reviews

1 / 20
6.0
Good

Delsy,Aug 2025

LIS - MIA

Boarding was a hassle. When I asked if my flight class had been assigned, the staff treated me poorly. The seats were small and very hard, and the temperature was extremely hot for about half of the flight. The food was good, but there wasn't enough chicken for the entire plane, so I only received pasta with no other options. The flight attendants were not friendly at all. Overall, for a group of 24 people, it was a very unpleasant experience.

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 14h 35m. Fly via Scandinavian Airlines, KLM, or Delta 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 $339. American Airlines flights start at $353 while deals on British Airways start at $379 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.

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$480Average$841FlexibilityNo cancel feeOn-timeN/A

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