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Cheap flights from Seattle to Lisbon from £442

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 13/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
7 Apr — 14 Apr1
1 adult

Cheap flight deals from Seattle to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Lisbon (LIS). 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 2 April 2025.

Round-trip from

£548

One-way from

£442

Popular in

June

Cheapest in

January

Average price

£703
19/5-27/5
  • 19/5-27/5
  • 6 total stops
  • 65h 23m total
  • Seattle to Lisbon
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British Airways
  • British Airways
  • 13/4
  • 1 total stop
  • 13h 35m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£119 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
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Find flight deals from Seattle to Lisbon

Cheapest flights from Seattle to Lisbon
Explore the most affordable flight options available from Seattle to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 April 2025.

Wed 1/1016:20SEA - LIS
2 stops19h 15mMultiple Airlines
Wed 8/1007:15LIS - SEA
1 stop14h 45mMultiple Airlines
Deal found 31/3£541
Wed 5/1111:25SEA - LIS
2 stops19h 10mDelta
Sat 15/1111:15LIS - SEA
1 stop18h 58mDelta
Deal found 2/4£553
Sat 6/923:30SEA - LIS
1 stop13h 50mIcelandair
Thu 18/922:20LIS - SEA
1 stop27h 30mIcelandair
Deal found 1/4£553
Wed 24/1214:00SEA - LIS
2 stops25h 30mLufthansa
Wed 31/1205:00LIS - SEA
1 stop15h 10mLufthansa
Deal found 1/4£554
Sun 2/1107:46SEA - LIS
2 stops23h 39mFinnair
Sun 9/1116:10LIS - SEA
2 stops34h 48mFinnair
Deal found 1/4£555
Wed 16/420:20SEA - LIS
1 stop18h 50mBritish Airways
Tue 22/418:45LIS - SEA
1 stop24h 50mBritish Airways
Deal found 2/4£563
Wed 24/1214:00SEA - LIS
2 stops25h 30mUnited Airlines
Tue 30/1210:15LIS - SEA
2 stops33h 11mUnited Airlines
Deal found 1/4£573
Wed 27/814:00SEA - LIS
2 stops22h 40mScandinavian Airlines
Wed 3/907:15LIS - SEA
1 stop14h 35mScandinavian Airlines
Deal found 1/4£577
Wed 23/415:24SEA - LIS
2 stops23h 56mSWISS
Wed 7/515:35LIS - SEA
2 stops34h 58mSWISS
Deal found 1/4£635
Thu 18/919:10SEA - LIS
1 stop20h 25mTurkish Airlines
Mon 22/910:55LIS - SEA
1 stop31h 40mTurkish Airlines
Deal found 2/4£636
Thu 18/912:20SEA - LIS
1 stop14h 50mAir Canada
Mon 22/912:15LIS - SEA
2 stops38h 21mAir Canada
Deal found 2/4£640
Thu 1/507:23SEA - LIS
1 stop16h 37mKLM
Sat 10/505:00LIS - SEA
1 stop18h 57mKLM
Deal found 1/4£717

Cheapflights Fare Finder

Customise your flight search to find flights from Seattle to Lisbon 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 858,174 searches. Data last updated 2 April 2025.
Use the filters below to find and compare flights from Seattle to Lisbon that are best for you.

Fly from

Seattle

Fly to

Lisbon

Route

Depart

Return

Price

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 19/5

15:45-08:30

3 stops32h 45m

Lisbon Humberto Delgado

Tue 27/5

21:35-22:13

3 stops32h 38m

£548

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 6/9

15:45-21:20

1 stop21h 35m

Lisbon Humberto Delgado

Sun 14/9

22:25-17:50

1 stop27h 25m

£553

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 22/4

18:40-17:50

1 stop15h 10m

Lisbon Humberto Delgado

Fri 2/5

05:00-15:57

1 stop18h 57m

£556

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 16/4

20:20-23:10

1 stop18h 50m

Lisbon Humberto Delgado

Tue 22/4

18:45-11:35

1 stop24h 50m

£563

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 27/8

14:00-20:40

2 stops22h 40m

Lisbon Humberto Delgado

Wed 3/9

07:15-13:50

1 stop14h 35m

£577

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 17/9

07:20-09:20

1 stop18h 00m

Lisbon Humberto Delgado

Tue 23/9

11:25-18:09

3 stops38h 44m

£607

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 9/7

10:00-09:20

2 stops15h 20m

Lisbon Humberto Delgado

Fri 22/8

11:25-22:16

2 stops18h 51m

£617

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 23/4

15:24-23:20

2 stops23h 56m

Lisbon Humberto Delgado

Wed 7/5

15:35-18:33

2 stops34h 58m

£635

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 18/9

19:10-23:35

1 stop20h 25m

Lisbon Humberto Delgado

Mon 22/9

10:55-10:35

1 stop31h 40m

£636

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 18/9

12:20-11:10

1 stop14h 50m

Lisbon Humberto Delgado

Mon 22/9

12:15-18:36

2 stops38h 21m

£640

Flights are sorted by cheapest return flights first.

Deals found on 2/4

Showing 1-10 of 24 results
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Best time to book a flight from Seattle to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Seattle with our price prediction graph.
Estimated return 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 Seattle to Lisbon

How far ahead should I book a flight from Seattle to Lisbon?

Use this chart to determine the optimal time to book a return flight from Seattle to Lisbon. Price data was last updated on 28 March 2025.

The price you pay for your flight from Seattle to Lisbon may vary depending on when you book. For the best chance of a lower fare, look to book 67 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Lisbon (average of £101). Flying from Seattle to Lisbon in August is currently the most expensive (average of £274). 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 Lisbon by month

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

In terms of precipitation, rainfall in Lisbon ranges from 6.0 - 122.0 inches per month. December is typically the wettest month, when rainfall can reach 122.0 mm. July is typically the driest time to visit Lisbon when rainfall is around 6.0 mm.

Temperature in Lisbon by month

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

If weather is an important factor for your trip to Lisbon, 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 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. 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 Lisbon. Reviews last updated 2 April 2025.
Read reviews from past customers who have flown Delta, KLM and Finnair from Seattle to Lisbon. 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
7,897 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,897 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,323 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,574 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,427 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Overall

8.0

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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 Lisbon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Seattle to Lisbon round-trip?

    Icelandair, at £553, was found to be the cheapest airline from Seattle to Lisbon.Alternate airlines flying return to your destination include Delta and British Airways. Icelandair is priced at 27% lower than the current average price of a flight leaving 3 months from now.

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

    One-way options have recently been found by users for as low as £442 on British Airways. Other airlines that offer cheap prices include Delta from £463 and United Airlines from £471 one-way.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Seattle to Lisbon (average of £101). Flying from Seattle to Lisbon in August is currently the most expensive (average of £274). 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

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Madeira
Setúbal
Costa da Caparica
Almada
Sintra
Fátima
Oeiras
Estoril
Nazaré
Beja
Sesimbra
Peniche
Figueira da Foz

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