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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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
5 May — 12 May1
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 30 April 2025.

Round-trip from

£535

One-way from

£442

Popular in

June

Cheapest in

January

Average price

£678
Scandinavian Airlines
  • Scandinavian Airlines
  • 3/10-15/10
  • 4 total stops
  • 81h 49m total
  • Seattle to Lisbon
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United Airlines
  • United Airlines
  • 1/10
  • 1 total stop
  • 18h 00m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£108 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).
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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 30 April 2025.

Fri 3/1015:20SEA - LIS
2 stops57h 40mScandinavian Airlines
Wed 15/1007:15LIS - SEA
2 stops24h 09mScandinavian Airlines
Deal found 28/4£535
Sun 5/1016:20SEA - LIS
1 stop20h 20mMultiple Airlines
Fri 24/1006:45LIS - SEA
2 stops23h 28mMultiple Airlines
Deal found 29/4£547
Mon 11/807:20SEA - LIS
1 stop19h 25mDelta
Wed 20/805:00LIS - SEA
1 stop14h 35mDelta
Deal found 29/4£603
Thu 2/1019:10SEA - LIS
1 stop30h 45mTurkish Airlines
Wed 15/1005:55LIS - SEA
1 stop19h 20mTurkish Airlines
Deal found 28/4£605
Wed 1/1013:29SEA - LIS
2 stops18h 11mBritish Airways
Mon 13/1018:45LIS - SEA
1 stop24h 25mBritish Airways
Deal found 29/4£623
Thu 20/1112:50SEA - LIS
1 stop13h 25mUnited Airlines
Sat 29/1105:00LIS - SEA
1 stop15h 10mUnited Airlines
Deal found 29/4£634
Sat 9/815:45SEA - LIS
1 stop21h 35mIcelandair
Sat 30/807:00LIS - SEA
2 stops21h 40mIcelandair
Deal found 28/4£648
Mon 6/1013:45SEA - LIS
2 stops25h 35mSWISS
Mon 27/1012:15LIS - SEA
2 stops42h 11mSWISS
Deal found 29/4£670
Sun 14/1215:10SEA - LIS
2 stops34h 10mLufthansa
Mon 5/115:55LIS - SEA
2 stops29h 25mLufthansa
Deal found 28/4£686
Mon 14/709:50SEA - LIS
2 stops16h 55mVirgin Atlantic
Thu 31/710:00LIS - SEA
1 stop18h 09mVirgin Atlantic
Deal found 29/4£703
Sun 18/518:07SEA - LIS
1 stop20h 43mKLM
Mon 26/519:30LIS - SEA
1 stop24h 10mKLM
Deal found 29/4£711
Tue 7/1013:30SEA - LIS
1 stop25h 30mFinnair
Sat 18/1006:35LIS - SEA
2 stops21h 47mFinnair
Deal found 28/4£821

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 30 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

Fri 3/10

15:20-09:00

2 stops57h 40m

Lisbon Humberto Delgado

Wed 15/10

07:15-23:24

2 stops24h 09m

£535

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 5/10

16:20-20:40

1 stop20h 20m

Lisbon Humberto Delgado

Fri 24/10

06:45-22:13

2 stops23h 28m

£547

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 11/8

07:20-10:45

1 stop19h 25m

Lisbon Humberto Delgado

Wed 20/8

05:00-11:35

1 stop14h 35m

£603

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 2/10

19:10-09:55

1 stop30h 45m

Lisbon Humberto Delgado

Wed 15/10

05:55-17:15

1 stop19h 20m

£605

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 1/10

13:29-15:40

2 stops18h 11m

Lisbon Humberto Delgado

Mon 13/10

18:45-11:10

1 stop24h 25m

£623

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 9/8

15:45-21:20

1 stop21h 35m

Lisbon Humberto Delgado

Sat 30/8

07:00-20:40

2 stops21h 40m

£648

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 6/10

13:45-23:20

2 stops25h 35m

Lisbon Humberto Delgado

Mon 27/10

12:15-23:26

2 stops42h 11m

£670

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 10/8

07:20-09:20

1 stop18h 00m

Lisbon Humberto Delgado

Sat 30/8

09:50-11:31

2 stops33h 41m

£679

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 3/8

10:00-09:20

2 stops15h 20m

Lisbon Humberto Delgado

Sun 24/8

06:15-16:59

1 stop18h 44m

£692

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 14/7

09:50-10:45

2 stops16h 55m

Lisbon Humberto Delgado

Thu 31/7

10:00-22:21

2 stops20h 21m

£703

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 16 results
1
2

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 25 April 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 30 April 2025.
Delta
8.0
Very Good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

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
7,929 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

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
1,334 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

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
1,275 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

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
1,588 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

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.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Entertainment

7.9

Comfort

7.9

Crew

8.5

Boarding

8.2

Food

7.3

Overall

8.0

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?

    Scandinavian Airlines, at £535, was found to be the cheapest airline from Seattle to Lisbon.Alternate airlines flying return to your destination include Delta and Turkish Airlines. Scandinavian Airlines is priced at 26% 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 United Airlines. Other airlines that offer cheap prices include Air Europa from £585 and Turkish Airlines from £590 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
Fátima
Almada
Costa da Caparica
Sintra
Oeiras
Estoril
Nazaré
Beja
Peniche
Sesimbra
Figueira da Foz

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Cheapflights does show flights with no change fees to all users. To see these options for flights from Seattle to Lisbon, users can toggle the no change fees filter when performing a flight search.

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