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District of Columbia

$358+ 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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — IAD
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
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 December 16, 2025.

This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:00 amOPO - IAD
1 stop13h 35mUnited Airlines
Sat 1/39:00 amIAD - OPO
2 stops25h 05mUnited Airlines
Deal found 12/15$829
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/2412:30 pmOPO - DCA
2 stops39h 05mUnited Airlines
Sat 1/38:40 pmDCA - OPO
2 stops34h 00mUnited Airlines
Deal found 12/16$1,014
This Gotogate deal was found by Cheapflights users on 12/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 pmOPO - IAD
1 stop26h 15mTAP AIR PORTUGAL
Sun 1/410:30 pmIAD - OPO
1 stop18h 30mTAP AIR PORTUGAL
Deal found 12/15$1,082
This Mytrip deal was found by Cheapflights users on 12/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:05 pmOPO - IAD
2 stops28h 10mMultiple Airlines
Sun 1/410:30 pmIAD - OPO
2 stops19h 30mMultiple Airlines
Deal found 12/15$1,129
This AirNGo deal was found by Cheapflights users on 12/15. 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 AirNGo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:40 pmOPO - DCA
2 stops27h 00mBritish Airways
Sun 1/42:00 pmDCA - OPO
2 stops46h 35mBritish Airways
Deal found 12/15$1,290
This Air Canada deal was found by Cheapflights users on 12/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:55 amOPO - DCA
2 stops14h 10mAir Canada
Sat 1/36:00 amDCA - OPO
2 stops27h 00mAir Canada
Deal found 12/15$1,304
This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:20 pmOPO - IAD
2 stops29h 55mSWISS
Sat 1/36:10 pmIAD - OPO
2 stops19h 25mSWISS
Deal found 12/16$1,308
This Cheapflightsfares deal was found by Cheapflights users on 12/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:15 pmOPO - IAD
2 stops26h 45mLufthansa
Sat 1/35:20 pmIAD - OPO
2 stops16h 45mLufthansa
Deal found 12/15$1,372
This SWISS deal was found by Cheapflights users on 12/15. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:20 pmOPO - IAD
2 stops23h 40mSWISS
Sun 1/48:30 pmIAD - OPO
1 stop33h 45mSWISS
Deal found 12/15$1,495
This Rumbo deal was found by Cheapflights users on 12/15. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:40 pmOPO - DCA
2 stops27h 00mMultiple Airlines
Sun 1/48:10 pmDCA - OPO
1 stop10h 45mMultiple Airlines
Deal found 12/15$1,894
This oojo deal was found by Cheapflights users on 12/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:35 pmOPO - DCA
1 stop29h 57mTAP AIR PORTUGAL
Sat 1/38:10 pmDCA - OPO
2 stops15h 50mTAP AIR PORTUGAL
Deal found 12/15$1,923
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:35 pmOPO - DCA
1 stop19h 53mTAP AIR PORTUGAL
Sun 1/48:10 pmDCA - OPO
1 stop10h 45mTAP AIR PORTUGAL
Deal found 12/15$3,698

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 December 16, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$506
(oojo)

One-way from

$358
(Travelocity)

Popular in

July

Cheapest in

May

Average price

$626
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. 12% potential increase in price ($94 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 16, 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 1/30

2:20 pm-9:00 pm

1 stop11h 40m

Washington, D.C. Dulles Intl

Fri 2/6

10:30 pm-5:00 pm

1 stop13h 30m

$506

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/15

7:00 am-3:15 pm

1 stop13h 15m

Washington, D.C. Dulles Intl

Wed 1/28

10:30 pm-5:00 pm

1 stop13h 30m

$508

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/29

7:00 am-3:15 pm

1 stop13h 15m

Washington, D.C. Dulles Intl

Thu 2/5

5:30 pm-9:55 am

1 stop11h 25m

$508

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/15

6:00 am-3:46 pm

2 stops38h 46m

Washington, D.C. Dulles Intl

Wed 1/28

9:45 am-11:15 am

2 stops20h 30m

$596

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 3/5

6:00 am-8:55 am

2 stops31h 55m

Washington, D.C. Reagan-National

Mon 3/9

8:10 pm-9:30 am

1 stop9h 20m

$597

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Mon 1/12

11:15 am-4:05 pm

1 stop33h 50m

Washington, D.C. Dulles Intl

Mon 1/19

6:50 pm-10:30 am

1 stop10h 40m

$599

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/29

5:00 am-4:05 pm

1 stop16h 05m

Washington, D.C. Dulles Intl

Thu 2/5

12:23 pm-10:25 am

2 stops17h 02m

$600

PortoWashington, D.C.

OPO - IAD

OPOIAD

Porto

Thu 1/15

6:35 am-4:05 pm

1 stop14h 30m

Washington, D.C. Dulles Intl

Wed 1/28

12:23 pm-10:30 am

2 stops17h 07m

$600

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 3/5

6:00 am-7:45 pm

2 stops42h 45m

Washington, D.C. Reagan-National

Mon 3/9

11:05 am-12:50 pm

2 stops21h 45m

$604

PortoWashington, D.C.

OPO - DCA

OPODCA

Porto

Thu 1/29

11:15 am-10:48 pm

2 stops16h 33m

Washington, D.C. Reagan-National

Thu 2/5

11:11 am-10:25 am

2 stops18h 14m

$606

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 39 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 December 16, 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 December 16, 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
7.2
Good
2,091 reviews

Overall

7.2

Crew

7.8

Entertainment

6.3

Food

6.2

Boarding

7.0

Comfort

7.1

Reviews

1 / 20
8.0
Excellent

Michael,Dec 2025

FNC - LIS

Long wait standing after checking in at the gate Limited juice selection.
TAP AIR PORTUGAL
7.2
Good
2,091 reviews
TAP AIR PORTUGAL
7.2
Good
2,091 reviews

Overall

7.2

Crew

7.8

Entertainment

6.3

Food

6.2

Boarding

7.0

Comfort

7.1

Reviews

1 / 20
8.0
Excellent

Michael,Dec 2025

FNC - LIS

Long wait standing after checking in at the gate Limited juice selection.

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 40m. Fly via TAP AIR PORTUGAL, United Airlines, or KLM 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. TAP AIR PORTUGAL flights start at $400 while deals on United Airlines start at $721 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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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 December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$492Average$804FlexibilityNo cancel feeOn-timeN/A

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