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Portugal

$348+ Cheap flights from Seattle (SEA) to Portugal

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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
ene. 28 — feb. 41
mar. 1/28
mar. 2/4
1 adult, Economy
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Cheap flight deals from Seattle to Portugal

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Portugal (PT0). 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 23, 2025.

Round-trip from

$649
(Mytrip)

One-way from

$348
(Kiwi.com)
From Seattle/Tacoma Intl to Portugal
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One-way flight from Seattle/Tacoma Intl to Portugal
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Find flight deals from Seattle to Portugal

Cheapest flights from Seattle to Portugal
Explore the most affordable flight options available from Seattle to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 23, 2025.

This Ticket deal was found by Cheapflights users on 1/23. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/101:40 pmSEA - OPO
1 stop14h 10mKLM
lun. 3/1712:15 pmOPO - SEA
1 stop31h 25mKLM
Deal found 1/23$663
This Mytrip deal was found by Cheapflights users on 1/23. 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 stops32h 30mMultiple Airlines
lun. 3/176:35 pmOPO - SEA
3 stops30h 50mMultiple Airlines
Deal found 1/23$678
This Mytrip deal was found by Cheapflights users on 1/22. 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.
dom. 3/163:35 pmSEA - FNC
2 stops26h 25mMultiple Airlines
lun. 3/241:05 pmFNC - SEA
2 stops35h 55mMultiple Airlines
Deal found 1/22$680
This Air Canada deal was found by Cheapflights users on 1/23. 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.
mié. 3/510:35 amSEA - OPO
2 stops20h 40mAir Canada
mié. 3/126:00 amOPO - SEA
2 stops22h 30mAir Canada
Deal found 1/23$696
This United Airlines deal was found by Cheapflights users on 1/23. 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 1/23$697
This Gotogate deal was found by Cheapflights users on 1/23. 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.
mié. 3/52:00 pmSEA - OPO
1 stop17h 15mLufthansa
mié. 3/124:30 pmOPO - SEA
1 stop27h 40mLufthansa
Deal found 1/23$717
This Gotogate deal was found by Cheapflights users on 1/23. 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.
dom. 3/27:05 pmSEA - LIS
2 stops30h 15mMultiple Airlines
lun. 3/102:10 pmLIS - SEA
1 stop31h 10mMultiple Airlines
Deal found 1/23$726
This Gotogate deal was found by Cheapflights users on 1/22. 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.
dom. 3/910:35 amSEA - LIS
2 stops39h 45mAir Canada
dom. 3/165:00 amLIS - SEA
2 stops24h 00mAir Canada
Deal found 1/22$727
This Air France deal was found by Cheapflights users on 1/23. 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.
mar. 3/117:30 amSEA - LIS
1 stop18h 30mAir France
mar. 3/1811:15 amLIS - SEA
1 stop17h 16mAir France
Deal found 1/23$728
This British Airways deal was found by Cheapflights users on 1/22. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/36:50 pmSEA - LIS
1 stop16h 05mBritish Airways
vie. 2/1410:45 amLIS - SEA
1 stop14h 10mBritish Airways
Deal found 1/22$729
This Mytrip deal was found by Cheapflights users on 1/23. 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.
dom. 3/96:05 amSEA - FAO
2 stops31h 10mMultiple Airlines
dom. 3/169:05 amFAO - SEA
2 stops35h 05mMultiple Airlines
Deal found 1/23$731
This United Airlines deal was found by Cheapflights users on 1/23. 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.
lun. 3/176:15 amSEA - LIS
2 stops18h 55mUnited Airlines
vie. 3/286:10 amLIS - SEA
1 stop15h 10mUnited Airlines
Deal found 1/23$731

Find flights from Seattle to Portugal within your budget

Customize your flight search to find flights from Seattle to Portugal 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 23, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

lun. 3/10

1:40 pm-10:50 am

1 stop14h 10m

Porto

lun. 3/17

12:15 pm-12:40 pm

1 stop31h 25m

$663

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

lun. 3/10

5:45 am-9:15 pm

3 stops32h 30m

Porto

lun. 3/17

6:35 pm-6:25 pm

3 stops30h 50m

$678

SeattleFunchal

SEA - FNC

SEAFNC

Seattle/Tacoma Intl

dom. 3/16

3:35 pm-1:00 am

2 stops26h 25m

Funchal Madeira

lun. 3/24

1:05 pm-6:00 pm

2 stops35h 55m

$680

SeattlePorto

SEA - OPO

SEAOPO

Seattle/Tacoma Intl

mié. 3/5

10:35 am-3:15 pm

2 stops20h 40m

Porto

mié. 3/12

6:00 am-9:30 pm

2 stops22h 30m

$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

mié. 3/5

2:00 pm-3:15 pm

1 stop17h 15m

Porto

mié. 3/12

4:30 pm-1:10 pm

1 stop27h 40m

$717

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

dom. 3/2

7:05 pm-9:20 am

2 stops30h 15m

Lisbon Humberto Delgado

lun. 3/10

2:10 pm-2:20 pm

1 stop31h 10m

$726

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

dom. 3/9

10:35 am-9:20 am

2 stops39h 45m

Lisbon Humberto Delgado

dom. 3/16

5:00 am-10:00 pm

2 stops24h 00m

$727

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

mar. 3/11

7:30 am-9:00 am

1 stop18h 30m

Lisbon Humberto Delgado

mar. 3/18

11:15 am-9:31 pm

1 stop17h 16m

$728

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

lun. 2/3

6:50 pm-12:05 pm

1 stop33h 15m

Lisbon Humberto Delgado

mié. 2/12

3:45 pm-4:55 pm

1 stop33h 10m

$729

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/23

Showing 1-10 of 60 results
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Best time to book a flight from Seattle to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Seattle 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 Seattle to Portugal

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

What is the cheapest month to book a flight from Seattle to Portugal?

Currently, January is the cheapest month in which you can book a flight from Seattle to Portugal (average of $612). Flying from Seattle to Portugal in June is currently the most expensive (average of $1,247). 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 SEA to PT?

Find hourly flight availability from Seattle to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated enero 23, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Portugal as you normally would.

Rainfall in Portugal by month

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

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

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

If weather is an important factor for your trip to Portugal, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated enero 23, 2025.
Read through reviews of airlines operating flights from Seattle to Portugal, such as Turkish Airlines, KLM and American Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,508 reviews

Overall

8.0

Entertainment

7.9

Crew

8.6

Food

7.3

Boarding

8.2

Comfort

8.0

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
8,508 reviews
Delta
8.0
Very good
8,508 reviews

Overall

8.0

Entertainment

7.9

Crew

8.6

Food

7.3

Boarding

8.2

Comfort

8.0

Reviews

1 / 10

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

KLM
7.8
Good
1,338 reviews
Delta
8.0
Very good
8,508 reviews

Overall

8.0

Entertainment

7.9

Crew

8.6

Food

7.3

Boarding

8.2

Comfort

8.0

Reviews

1 / 10

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

SWISS
7.5
Good
1,598 reviews
Delta
8.0
Very good
8,508 reviews

Overall

8.0

Entertainment

7.9

Crew

8.6

Food

7.3

Boarding

8.2

Comfort

8.0

Reviews

1 / 10

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

Air France
7.4
Good
1,488 reviews
Delta
8.0
Very good
8,508 reviews

Overall

8.0

Entertainment

7.9

Crew

8.6

Food

7.3

Boarding

8.2

Comfort

8.0

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
8,970 reviews
Delta
8.0
Very good
8,508 reviews

Overall

8.0

Entertainment

7.9

Crew

8.6

Food

7.3

Boarding

8.2

Comfort

8.0

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 Seattle to Portugal. 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 Seattle to Portugal?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Portugal. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • What are the cheapest airlines to fly from Seattle to Portugal one-way?

    For one-way options, check prices for TAP AIR PORTUGAL. According to our data, you can fly for as low as $396. Users have also found prices from $452 and $472 on Lufthansa and KLM, respectively.

  • What are the most popular routes from Seattle to Portugal?

    When deciding which route to take from Seattle to Portugal consider Seattle/Tacoma Intl - Lisbon Humberto Delgado, Seattle/Tacoma Intl - Porto or Seattle/Tacoma Intl - Faro as they are the most popular.

  • Can I find deals for flights from Seattle to Portugal that include hotel bookings?

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

  • How can I find direct flights from Seattle to Portugal?

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

  • Can I find deals for business class flights from Seattle to Portugal?

    Yes. Cheapflights offers flight deals from Seattle to Portugal 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 Seattle to Portugal?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Portugal (average of $612). Flying from Seattle to Portugal in June is currently the most expensive (average of $1,247). 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.

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Alternative routes for Seattle to Portugal

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Top 10 airlines flying from Seattle to Portugal

Discover the top 10 airlines that operate flights from Seattle to Portugal. 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 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$543Average$746FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$544Average$883FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$600Average$1,153FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$609Average$1,035FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$632Average$1,305FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$635Average$1,005FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$652Average$821FlexibilityNo cancel feeOn-time77%
DeltaCheapest$674Average$1,126FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$700Average$1,082FlexibilityNo cancel feeOn-time77%
Air CanadaCheapest$702Average$1,050FlexibilityNo cancel feeOn-time67%
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