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District of Columbia

$354+ 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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — IAD
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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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 September 15, 2025.

Round-trip from

$530
(American Airlines)

One-way from

$354
(American Airlines)

Popular in

January

Cheapest in

May

Average price

$793
From Porto to District of Columbia
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One-way flight from Porto to District of Columbia
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Highest demand for flights based on searches. 15% potential increase in price ($123 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 15, 2025.

This Iberia deal was found by Cheapflights users on 9/14. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/28:15 amOPO - IAD
1 stop11h 45mIberia
Wed 10/154:35 pmIAD - OPO
1 stop18h 20mIberia
Deal found 9/14$530
This AirNGo deal was found by Cheapflights users on 9/14. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/269:20 amOPO - IAD
1 stop12h 00mKLM
Sat 10/49:20 pmIAD - OPO
1 stop13h 10mKLM
Deal found 9/14$538
This SWISS deal was found by Cheapflights users on 9/14. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3112:50 pmOPO - IAD
1 stop32h 50mSWISS
Sun 11/95:25 pmIAD - OPO
1 stop12h 45mSWISS
Deal found 9/14$541
This Air France deal was found by Cheapflights users on 9/14. 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.
Sat 11/14:10 pmOPO - IAD
1 stop28h 55mMultiple Airlines
Mon 11/106:50 pmIAD - OPO
1 stop10h 40mMultiple Airlines
Deal found 9/14$542
This SWISS deal was found by Cheapflights users on 9/13. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:20 pmOPO - IAD
1 stop25h 55mSWISS
Sat 10/118:45 pmIAD - OPO
1 stop16h 45mSWISS
Deal found 9/13$543
This KLM deal was found by Cheapflights users on 9/12. 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.
Wed 10/1511:35 amOPO - IAD
1 stop33h 00mMultiple Airlines
Tue 10/217:59 pmIAD - OPO
2 stops14h 31mMultiple Airlines
Deal found 9/12$544
This American Airlines deal was found by Cheapflights users on 9/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/28:15 amOPO - DCA
2 stops19h 04mAmerican Airlines
Wed 10/155:30 pmDCA - OPO
2 stops13h 10mAmerican Airlines
Deal found 9/15$545
This Air France deal was found by Cheapflights users on 9/13. 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.
Tue 9/236:50 pmOPO - IAD
1 stop25h 45mMultiple Airlines
Wed 10/19:20 pmIAD - OPO
1 stop30h 05mMultiple Airlines
Deal found 9/13$545
This Delta deal was found by Cheapflights users on 9/13. 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.
Tue 9/236:15 amOPO - DCA
2 stops16h 42mDelta
Tue 9/305:00 pmDCA - OPO
2 stops17h 30mDelta
Deal found 9/13$549
This Delta deal was found by Cheapflights users on 9/12. 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.
Wed 10/156:15 amOPO - IAD
2 stops18h 03mDelta
Wed 10/227:59 pmIAD - OPO
2 stops14h 31mDelta
Deal found 9/12$549
This Delta deal was found by Cheapflights users on 9/14. 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.
Wed 10/86:15 amOPO - DCA
2 stops15h 55mDelta
Tue 10/215:00 pmDCA - OPO
2 stops17h 30mDelta
Deal found 9/14$550
This Delta deal was found by Cheapflights users on 9/13. 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 9/269:20 amOPO - DCA
2 stops19h 21mDelta
Sat 10/45:00 pmDCA - OPO
2 stops17h 30mDelta
Deal found 9/13$551

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 September 15, 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

Thu 10/2

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Wed 10/15

4:35 pm-7:35 am

1 stop10h 00m

$530

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 10/2

8:15 am-3:00 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Wed 10/15

4:35 pm-3:55 pm

1 stop18h 20m

$530

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 10/31

12:50 pm-5:40 pm

1 stop32h 50m

Washington, D.C. Dulles Intl

Tue 11/11

5:25 pm-11:15 am

1 stop12h 50m

$541

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Fri 10/31

12:50 pm-5:40 pm

1 stop32h 50m

Washington, D.C. Dulles Intl

Sun 11/9

5:25 pm-11:10 am

1 stop12h 45m

$541

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 10/2

7:20 pm-4:15 pm

1 stop25h 55m

Washington, D.C. Dulles Intl

Sat 10/11

8:45 pm-6:30 pm

1 stop16h 45m

$543

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 10/11

12:05 pm-7:32 am

2 stops24h 27m

Washington, D.C. Dulles Intl

Sat 10/18

5:25 pm-11:15 am

1 stop12h 50m

$544

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/8

6:15 am-3:35 pm

1 stop14h 20m

Washington, D.C. Dulles Intl

Tue 10/21

7:59 pm-3:30 pm

2 stops14h 31m

$544

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Wed 10/15

6:15 am-3:35 pm

1 stop14h 20m

Washington, D.C. Dulles Intl

Mon 10/20

7:59 pm-3:30 pm

2 stops14h 31m

$544

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Sat 11/1

9:40 am-5:40 pm

1 stop36h 00m

Washington, D.C. Dulles Intl

Mon 11/10

5:25 pm-11:15 am

1 stop12h 50m

$544

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 10/30

7:25 pm-3:35 pm

1 stop24h 10m

Washington, D.C. Dulles Intl

Sun 11/9

5:25 pm-11:10 am

1 stop12h 45m

$544

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 40 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 September 15, 2025.

When flying from Porto to District of Columbia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 15, 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
1,975 reviews

Comfort

7.1

Crew

7.8

Food

6.2

Entertainment

6.3

Overall

7.1

Boarding

7.0

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
1,975 reviews
TAP AIR PORTUGAL
7.1
Good
1,975 reviews

Comfort

7.1

Crew

7.8

Food

6.2

Entertainment

6.3

Overall

7.1

Boarding

7.0

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 11h 45m. Fly via American Airlines, Iberia, or SWISS 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.

  • 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.

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

    Currently, August is the cheapest month in which you can book a flight from Porto to District of Columbia (average of $292). Flying from Porto to District of Columbia in April is currently the most expensive (average of $337). 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

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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$480Average$841FlexibilityNo cancel feeOn-timeN/A

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