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$343+ Cheap flights from Washington to Porto (OPO)

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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — OPO
ene. 26 — feb. 21
dom. 1/26
dom. 2/2
1 adult, Economy
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Cheap flight deals from Washington to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Washington (USWA) to Porto (OPO). 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 enero 21, 2025.

Round-trip from

$669
(Mytrip)

One-way from

$343
(Kiwi.com)
From Washington to Porto
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One-way flight from Washington to Porto
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Find flight deals from Washington to Porto

Cheapest flights from Washington to Porto
Explore the most affordable flight options available from Washington to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 21, 2025.

This Mytrip deal was found by Cheapflights users on 1/20. 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.
lun. 3/105:45 amSEA - OPO
3 stops25h 10mMultiple Airlines
lun. 3/176:35 pmOPO - SEA
3 stops34h 25mMultiple Airlines
Deal found 1/20$669
This KLM deal was found by Cheapflights users on 1/19. 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.
lun. 3/312:40 pmSEA - OPO
1 stop14h 10mKLM
lun. 3/1011:15 amOPO - SEA
1 stop32h 25mKLM
Deal found 1/19$696
This United Airlines deal was found by Cheapflights users on 1/20. 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.
mié. 3/52:00 pmSEA - OPO
1 stop17h 15mUnited Airlines
mié. 3/126:00 amOPO - SEA
2 stops46h 30mUnited Airlines
Deal found 1/20$697
This Gotogate deal was found by Cheapflights users on 1/20. 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.
lun. 3/32:00 pmSEA - OPO
1 stop24h 25mLufthansa
lun. 3/101:45 pmOPO - SEA
1 stop31h 35mLufthansa
Deal found 1/20$700
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 2/27:10 amSEA - OPO
2 stops19h 20mDelta
lun. 2/1711:15 amOPO - SEA
1 stop32h 31mDelta
Deal found 1/21$709
This Air Canada deal was found by Cheapflights users on 1/20. 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.
jue. 2/276:05 amSEA - OPO
2 stops26h 35mAir Canada
jue. 3/206:00 amOPO - SEA
2 stops22h 30mAir Canada
Deal found 1/20$749
This Delta deal was found by Cheapflights users on 1/20. 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.
dom. 2/27:10 amPDX - OPO
2 stops19h 45mDelta
sáb. 2/811:15 amOPO - PDX
1 stop32h 10mDelta
Deal found 1/20$753
This Justfly.com deal was found by Cheapflights users on 1/20. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 2/27:00 amPDX - OPO
2 stops20h 35mLufthansa
sáb. 2/81:45 pmOPO - PDX
2 stops41h 12mLufthansa
Deal found 1/20$775
This FlightHub deal was found by Cheapflights users on 1/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/258:00 pmSEA - OPO
1 stop36h 20mTurkish Airlines
mar. 4/2210:45 amOPO - SEA
1 stop38h 25mTurkish Airlines
Deal found 1/20$785
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/14:00 pmSEA - OPO
1 stop35h 15mScandinavian Airlines
sáb. 9/134:20 pmOPO - SEA
2 stops29h 40mScandinavian Airlines
Deal found 1/21$834
This United Airlines deal was found by Cheapflights users on 1/20. 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.
vie. 3/711:27 pmPDX - OPO
2 stops28h 13mUnited Airlines
vie. 3/1412:30 pmOPO - PDX
2 stops41h 09mUnited Airlines
Deal found 1/20$834
This KLM deal was found by Cheapflights users on 1/20. 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.
mar. 4/17:05 amPDX - OPO
2 stops19h 35mKLM
sáb. 4/126:55 pmOPO - PDX
1 stop24h 25mKLM
Deal found 1/20$976

Find flights from Washington to Porto within your budget

Customize your flight search to find flights from Washington to Porto 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 enero 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

mié. 3/19

10:35 am-11:20 pm

3 stops29h 45m

Porto

mié. 3/26

6:05 am-9:30 pm

2 stops22h 25m

$691

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

mar. 3/25

7:00 am-11:40 am

2 stops21h 40m

Porto

mié. 4/2

6:15 am-10:53 pm

2 stops24h 38m

$696

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

mié. 3/5

2:00 pm-3:15 pm

1 stop17h 15m

Porto

mié. 3/12

6:00 am-9:30 pm

2 stops46h 30m

$697

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

dom. 3/2

12:40 pm-10:55 am

1 stop14h 15m

Porto

lun. 3/10

4:10 pm-12:40 pm

1 stop27h 30m

$698

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

dom. 2/2

12:35 pm-10:55 am

1 stop14h 20m

Porto

lun. 2/17

11:15 am-11:46 am

1 stop32h 31m

$699

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

jue. 2/20

1:33 pm-5:15 pm

2 stops19h 42m

Porto

jue. 2/27

8:20 am-11:06 pm

2 stops22h 46m

$750

PortlandPorto

PDX - OPO

PDXOPO

Portland

dom. 2/2

7:05 am-10:55 am

2 stops19h 50m

Porto

sáb. 2/8

11:15 am-11:25 am

1 stop32h 10m

$752

PortlandPorto

PDX - OPO

PDXOPO

Portland

dom. 2/2

1:25 pm-11:25 am

1 stop14h 00m

Porto

sáb. 2/8

4:10 pm-11:25 am

1 stop27h 15m

$753

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

jue. 2/20

3:24 pm-11:10 am

2 stops35h 46m

Porto

jue. 2/27

7:30 pm-10:42 pm

2 stops35h 12m

$760

PortlandPorto

PDX - OPO

PDXOPO

Portland

dom. 2/16

9:55 am-3:10 pm

2 stops21h 15m

Porto

dom. 2/23

12:05 pm-10:35 pm

2 stops42h 30m

$764

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 34 results
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Best time to book a flight from Washington to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Washington 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 Washington to Porto

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

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

Currently, January is the cheapest month in which you can book a flight from State of Washington to Porto (average of $523). Flying from State of Washington to Porto in June is currently the most expensive (average of $1,083). 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.

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

Find hourly flight availability from Washington to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated enero 21, 2025.

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

Rainfall in Porto by month

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

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

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

If weather is an important factor for your trip to Porto, 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 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated enero 21, 2025.
See what other customers who have flown with KLM, Air Canada and United Airlines from Washington to Porto have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,521 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.6

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.6

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very good
8,521 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.6

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

SWISS
7.5
Good
1,600 reviews
Delta
8.0
Very good
8,521 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.6

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines
7.4
Good
8,984 reviews
Delta
8.0
Very good
8,521 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.6

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Turkish Airlines
7.3
Good
3,931 reviews
Delta
8.0
Very good
8,521 reviews

Overall

8.0

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.6

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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

    Porto (OPO) is the airport you will fly into if you book a flight from Washington to Porto. It is only a 6.8 mi journey from Porto (OPO) to Porto’s city center.

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

    For one-way options, check prices for KLM. According to our data, you can fly for as low as $524. Users have also found prices from $573 and $579 on Lufthansa and United Airlines, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington to Porto 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 State of Washington to Porto?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Porto (average of $523). Flying from State of Washington to Porto in June is currently the most expensive (average of $1,083). 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

Traveling to a place near Washington?

Book flights to Washington if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos
Arcos de Valdevez

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Alternative routes for Washington to Porto

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Washington to Porto

Discover the top 7 airlines that operate flights from Washington to Porto. 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 enero 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$544Average$771FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$673Average$1,174FlexibilityNo cancel feeOn-time70%
DeltaCheapest$674Average$1,115FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$753Average$1,136FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$759Average$913FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$769Average$1,165FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$851Average$1,275FlexibilityNo cancel feeOn-time69%
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