HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Washington

$340+ Cheap flights from Porto (OPO) to Washington

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 4/2. Fares are subject to change and may not be available on all flights or dates of travel.
OPO — SEA
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Porto to Washington with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Porto to Washington

Discover tips and strategies to find the most affordable flight options for your journey from Porto (OPO) to Washington (USWA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$720
(American Airlines)

One-way from

$340
(Kiwi.com)
From Porto to Washington
Search Deals
One-way flight from Porto to Washington
Search Deals

Find 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 January 21, 2025.

This American Airlines deal was found by Cheapflights users on 1/21. 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 2/68:20 amOPO - SEA
2 stops33h 21mAmerican Airlines
Mon 2/1010:33 amSEA - OPO
2 stops21h 27mAmerican Airlines
Deal found 1/21$720
This United Airlines deal was found by Cheapflights users on 1/21. 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 3/56:00 amOPO - SEA
2 stops47h 30mUnited Airlines
Wed 3/128:10 amSEA - OPO
2 stops24h 05mUnited Airlines
Deal found 1/21$769
This Fly & Visit Rome deal was found by Cheapflights users on 1/21. 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 Fly & Visit Rome is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/61:45 pmOPO - SEA
1 stop31h 35mLufthansa
Mon 2/102:00 pmSEA - OPO
1 stop17h 25mLufthansa
Deal found 1/21$777
This Mytrip deal was found by Cheapflights users on 1/21. 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 3/54:05 pmOPO - SEA
3 stops28h 05mMultiple Airlines
Wed 3/123:05 pmSEA - OPO
3 stops33h 40mMultiple Airlines
Deal found 1/21$780
This KLM deal was found by Cheapflights users on 1/21. 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 3/54:10 pmOPO - SEA
1 stop27h 27mKLM
Wed 3/123:15 pmSEA - OPO
1 stop21h 05mKLM
Deal found 1/21$796
This Turkish Airlines deal was found by Cheapflights users on 1/21. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/214:20 pmOPO - SEA
2 stops33h 18mTurkish Airlines
Tue 4/17:05 pmSEA - OPO
1 stop30h 40mTurkish Airlines
Deal found 1/21$3,164

Find flights from Porto to Washington within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 2/6

8:20 am-9:41 am

2 stops33h 21m

Seattle/Tacoma Intl

Mon 2/10

10:33 am-4:00 pm

2 stops21h 27m

$720

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 3/5

6:00 am-9:30 pm

2 stops47h 30m

Seattle/Tacoma Intl

Wed 3/12

8:10 am-3:15 pm

2 stops24h 05m

$769

PortoSeattle

OPO - SEA

OPOSEA

Porto

Thu 2/6

1:45 pm-1:20 pm

1 stop31h 35m

Seattle/Tacoma Intl

Mon 2/10

2:00 pm-3:25 pm

1 stop17h 25m

$777

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 3/5

4:05 pm-12:10 pm

3 stops28h 05m

Seattle/Tacoma Intl

Wed 3/12

3:05 pm-7:45 am

3 stops33h 40m

$780

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 3/5

4:10 pm-11:37 am

1 stop27h 27m

Seattle/Tacoma Intl

Wed 3/12

3:15 pm-7:20 pm

1 stop21h 05m

$796

PortoSeattle

OPO - SEA

OPOSEA

Porto

Fri 3/21

4:20 pm-6:38 pm

2 stops33h 18m

Seattle/Tacoma Intl

Tue 4/1

7:05 pm-9:45 am

1 stop30h 40m

$3,164

PortoSeattle

OPO - SEA

OPOSEA

Porto

Wed 4/2

7:15 pm-7:01 pm

3 stops31h 46m

$340

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sat 4/5

10:45 am-5:10 pm

1 stop38h 25m

$633

PortoSeattle

OPO - SEA

OPOSEA

Porto

Sat 4/5

4:35 pm-11:30 am

2 stops26h 55m

$654

PortoSeattle

OPO - SEA

OPOSEA

Porto

Fri 4/4

8:15 am-10:06 pm

2 stops21h 51m

$658

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 11 results
1
2

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.

Travel insights for flights from Porto to Washington

Get recent, data-driven insights about flights from Porto to Washington including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Porto to State of Washington?

Currently, January is the cheapest month in which you can book a flight from Porto to State of Washington (average of $238). Flying from Porto to State of Washington in July is currently the most expensive (average of $411). 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.

Rainfall in Washington by month

Plan your trip to Washington by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

Temperature in Washington by month

Plan your trip to Washington by taking into account the average temperature totals by month.

If weather is an important factor for your trip to State of Washington, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated January 21, 2025.
KLM
7.8
Good
1,341 reviews

Comfort

7.7

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

KLM
7.8
Good
1,341 reviews
KLM
7.8
Good
1,341 reviews

Comfort

7.7

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

United Airlines
7.4
Good
8,984 reviews
KLM
7.8
Good
1,341 reviews

Comfort

7.7

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Turkish Airlines
7.3
Good
3,931 reviews
KLM
7.8
Good
1,341 reviews

Comfort

7.7

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,341 reviews

Comfort

7.7

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Iberia
7.0
Good
2,646 reviews
KLM
7.8
Good
1,341 reviews

Comfort

7.7

Food

7.3

Boarding

7.8

Overall

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

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.

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

    To fly one-way, consider booking your trip with Turkish Airlines, which is currently one of the cheapest options available, starting at $633. Iberia flights start at $654 while deals on British Airways start at $658 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.

  • What is the cheapest month to book a flight from Porto to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from Porto to State of Washington (average of $238). Flying from Porto to State of Washington in July is currently the most expensive (average of $411). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Porto to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Lisbon to Newark flights
Lisbon to John F Kennedy Intl flights
Lisbon to Miami flights
Lisbon to LaGuardia flights
Porto to Newark flights
Porto to LaGuardia flights
Lisbon to Stewart flights
Lisbon to Boston flights
Porto to John F Kennedy Intl flights
Lisbon to Fort Lauderdale flights
Lisbon to West Palm Beach flights
Lisbon to Dulles Intl flights
Lisbon to San Francisco flights
Lisbon to Los Angeles flights
Faro to Newark flights
Faro to John F Kennedy Intl flights
Lisbon to O'Hare Intl flights
Ponta Delgada to Boston flights
Porto to Miami flights
Lisbon to Baltimore flights
Lisbon to Orlando flights
Lisbon to Reagan-National flights
Lisbon to Seattle flights
Porto to Los Angeles flights
Porto to West Palm Beach flights
Porto to Fort Lauderdale flights
Lisbon to Philadelphia flights
Faro to LaGuardia flights
Porto to Boston flights
Ponta Delgada to John F Kennedy Intl flights
Ponta Delgada to Newark flights
Ponta Delgada to LaGuardia flights
Porto to San Francisco flights
Lisbon to Dallas/Fort Worth flights
Lisbon to Las Vegas flights
Lisbon to San Diego flights
Porto to Orlando flights
Lisbon to Hobby flights
Porto to Las Vegas flights
Porto to Seattle flights
Lisbon to Sky Harbor Intl flights
Lisbon to Atlanta flights
Lisbon to Tampa flights
Porto to Atlanta flights
Lisbon to Honolulu flights
Lisbon to Portland flights
Porto to Charlotte flights

Top airline flying from Porto to Washington

Discover the top airline that operate flights from Porto to Washington. 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 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$756Average$820FlexibilityNo cancel feeOn-time75%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.