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$750+ Cheap flights from Porto (OPO) to Washington

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — SEA
Jan 6 — Jan 131
Tue 1/6
Tue 1/13
1 adult, Economy
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Cheap flight deals from Porto to Washington

Cheapest flights from Porto to Washington
Explore the most affordable flight options available from Porto to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 7, 2025.

This oojo deal was found by Cheapflights users on 12/5. 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 12/1010:55 amOPO - SEA
1 stop38h 10mTurkish Airlines
Fri 12/267:00 pmSEA - OPO
1 stop30h 55mTurkish Airlines
Deal found 12/5$2,915
This oojo deal was found by Cheapflights users on 12/5. 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.
Fri 12/1210:55 amOPO - SEA
1 stop38h 10mTurkish Airlines
Fri 12/267:00 pmSEA - OPO
1 stop30h 55mTurkish Airlines
Deal found 12/5$3,547
This Delta deal was found by Cheapflights users on 12/6. 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.
Thu 12/117:35 amOPO - SEA
2 stops21h 15mDelta
Sat 12/271:40 pmSEA - OPO
1 stop12h 50mDelta
Deal found 12/6$4,550
This Delta deal was found by Cheapflights users on 12/6. 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 12/107:35 amOPO - SEA
2 stops21h 15mDelta
Fri 12/2610:30 amSEA - OPO
2 stops16h 00mDelta
Deal found 12/6$4,563
This Cheapflightsfares deal was found by Cheapflights users on 12/5. 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.
Fri 12/124:40 pmOPO - SEA
2 stops25h 58mIberia
Fri 12/261:35 pmSEA - OPO
2 stops22h 25mIberia
Deal found 12/5$4,594
This Arangrant deal was found by Cheapflights users on 12/5. 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 Arangrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:30 amOPO - SEA
1 stop14h 50mLufthansa
Fri 12/267:00 amSEA - OPO
2 stops31h 25mLufthansa
Deal found 12/5$4,597

Find flight deals from Porto to Washington

Keep the following information in mind while searching for Porto to Washington flight deals. Data was last updated December 7, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$750
(Mytrip)

Popular in

July

Cheapest in

April

Average price

$1,038
Provider with most accurate pricing for Porto-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Porto-Seattle/Tacoma Intl flights.
Search Deals
From Porto to Washington
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($71 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($34 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 Washington 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 7, 2025.
Use the filters below to find and compare flights from Porto to Washington that are best for you.

Fly from

Porto

Fly to

Washington

Route

Depart

Return

Price

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 1/18

4:10 pm-5:00 pm

3 stops32h 50m

Seattle/Tacoma Intl

Tue 1/27

2:35 pm-10:30 am

3 stops35h 55m

$750

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 1/18

5:00 am-11:50 am

1 stop14h 50m

Seattle/Tacoma Intl

Tue 1/27

1:40 pm-10:30 am

1 stop12h 50m

$884

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 1/18

6:00 am-10:16 pm

2 stops24h 16m

Seattle/Tacoma Intl

Tue 1/27

8:10 am-11:15 am

2 stops43h 05m

$892

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 1/22

8:20 am-10:20 pm

2 stops22h 00m

Seattle/Tacoma Intl

Sun 1/25

6:50 pm-7:40 am

2 stops28h 50m

$908

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 1/22

4:10 pm-5:05 pm

1 stop32h 55m

Seattle/Tacoma Intl

Sun 1/25

7:00 pm-9:50 am

1 stop30h 50m

$981

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sun 1/18

6:00 am-10:43 pm

3 stops24h 43m

Seattle/Tacoma Intl

Tue 1/27

11:45 pm-11:05 am

2 stops27h 20m

$1,081

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/5

Best time to book a flight from Porto to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington 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 Washington
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Porto to Washington. 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 Washington?

    Most people fly from Porto (OPO) if they book a flight from Porto to Washington. Porto is conveniently located just 6.8 mi from Porto’s city center.

  • How long is the flight from Porto to State of Washington?

    There are many flights that can get you from Porto to State of Washington in 14h 50m. Fly via Delta or Air Canada to get the fastest option. The distance from Porto to State of Washington is about 5083 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Porto to State of Washington one-way?

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $707. Air France flights start at $717 while deals on KLM start at $722 one-way.

  • Can I find deals for flights from Porto to Washington that include hotel bookings?

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

  • How can I find direct flights from Porto to Washington?

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

  • Can I find deals for business class flights from Porto to Washington?

    Yes. Cheapflights offers flight deals from Porto to Washington 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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