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Cheap flights from Seattle to Lisbon from C$ 581

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LIS
4 May — 11 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 29 April 2025.

Round-trip from

C$ 989

One-way from

C$ 581

Popular in

June

Cheapest in

January

Average price

C$ 1,260
Scandinavian Airlines
  • Scandinavian Airlines
  • 20/8-27/8
  • 4 total stops
  • 45h 21m total
  • Seattle to Lisbon
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Icelandair
  • Icelandair
  • 23/8
  • 1 total stop
  • 13h 50m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 373 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 61 potential savings vs. average RT 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 29 April 2025.

Wed 20/84:00 p.m.SEA - LIS
2 stops21h 50mMultiple Airlines
Wed 27/87:15 a.m.LIS - SEA
2 stops23h 31mMultiple Airlines
Deal found 28/4C$ 989
Fri 3/103:20 p.m.SEA - LIS
2 stops57h 40mScandinavian Airlines
Wed 15/107:15 a.m.LIS - SEA
2 stops24h 09mScandinavian Airlines
Deal found 28/4C$ 994
Sat 25/108:45 a.m.SEA - LIS
2 stops16h 25mUnited Airlines
Sat 1/1110:15 a.m.LIS - SEA
2 stops30h 10mUnited Airlines
Deal found 28/4C$ 1,038
Tue 15/77:15 a.m.SEA - LIS
1 stop16h 45mKLM
Wed 27/87:30 p.m.LIS - SEA
1 stop24h 05mKLM
Deal found 28/4C$ 1,121
Thu 2/107:10 p.m.SEA - LIS
1 stop30h 45mTurkish Airlines
Wed 15/105:55 a.m.LIS - SEA
1 stop19h 20mTurkish Airlines
Deal found 28/4C$ 1,124
Tue 12/86:00 a.m.SEA - LIS
2 stops20h 45mDelta
Fri 22/810:00 a.m.LIS - SEA
1 stop20h 53mDelta
Deal found 28/4C$ 1,134
Wed 1/101:29 p.m.SEA - LIS
2 stops18h 11mBritish Airways
Mon 13/105:05 p.m.LIS - SEA
1 stop26h 05mBritish Airways
Deal found 28/4C$ 1,157
Sat 16/87:00 p.m.SEA - LIS
1 stop18h 20mIcelandair
Thu 21/810:20 p.m.LIS - SEA
2 stops31h 14mIcelandair
Deal found 28/4C$ 1,164
Wed 14/510:55 a.m.SEA - LIS
2 stops19h 50mSWISS
Mon 19/53:35 p.m.LIS - SEA
2 stops34h 58mSWISS
Deal found 28/4C$ 1,238
Sun 14/123:10 p.m.SEA - LIS
2 stops34h 10mLufthansa
Mon 5/13:55 p.m.LIS - SEA
2 stops29h 25mLufthansa
Deal found 28/4C$ 1,275
Mon 14/77:45 a.m.SEA - LIS
1 stop19h 00mVirgin Atlantic
Thu 31/710:00 a.m.LIS - SEA
2 stops21h 52mVirgin Atlantic
Deal found 28/4C$ 1,307

Cheapflights Fare Finder

Customize 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 629,999 searches. Data last updated 29 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

Wed 20/8

4:00 p.m.-9:50 p.m.

2 stops21h 50m

Lisbon Humberto Delgado

Wed 27/8

7:15 a.m.-10:46 p.m.

2 stops23h 31m

C$ 989

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Fri 3/10

3:20 p.m.-9:00 a.m.

2 stops57h 40m

Lisbon Humberto Delgado

Wed 15/10

7:15 a.m.-11:24 p.m.

2 stops24h 09m

C$ 994

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 25/10

8:45 a.m.-9:10 a.m.

2 stops16h 25m

Lisbon Humberto Delgado

Sat 1/11

10:15 a.m.-9:25 a.m.

2 stops30h 10m

C$ 1,038

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 15/7

7:15 a.m.-8:00 a.m.

1 stop16h 45m

Lisbon Humberto Delgado

Wed 27/8

7:30 p.m.-11:35 a.m.

1 stop24h 05m

C$ 1,121

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 2/10

7:10 p.m.-9:55 a.m.

1 stop30h 45m

Lisbon Humberto Delgado

Wed 15/10

5:55 a.m.-5:15 p.m.

1 stop19h 20m

C$ 1,124

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 12/8

6:00 a.m.-10:45 a.m.

2 stops20h 45m

Lisbon Humberto Delgado

Fri 22/8

10:00 a.m.-10:53 p.m.

1 stop20h 53m

C$ 1,134

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 1/10

1:29 p.m.-3:40 p.m.

2 stops18h 11m

Lisbon Humberto Delgado

Mon 13/10

5:05 p.m.-11:10 a.m.

1 stop26h 05m

C$ 1,157

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 16/8

7:00 p.m.-9:20 p.m.

1 stop18h 20m

Lisbon Humberto Delgado

Thu 21/8

10:20 p.m.-9:34 p.m.

2 stops31h 14m

C$ 1,164

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 14/5

10:55 a.m.-2:45 p.m.

2 stops19h 50m

Lisbon Humberto Delgado

Mon 19/5

3:35 p.m.-6:33 p.m.

2 stops34h 58m

C$ 1,238

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sun 3/8

10:00 a.m.-9:20 a.m.

2 stops15h 20m

Lisbon Humberto Delgado

Sun 24/8

5:05 a.m.-6:49 p.m.

2 stops21h 44m

C$ 1,304

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Showing 1-10 of 17 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 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.

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 round-trip flight from Seattle to Lisbon. Price data was last updated on 25 April 2025.

Booking 67 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Lisbon. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 C$ 482). Flying from Seattle to Lisbon in July is currently the most expensive (average of C$ 780). 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 LIS?

Find hourly flight availability from Seattle to Lisbon. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 April 2025.

When flying from Seattle to Lisbon, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 6% versus a flight at noon.

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 mm 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 29 April 2025.
See what other customers who have flown with Delta, KLM and SWISS from Seattle to Lisbon have to say. 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
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

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

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
1,333 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

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
1,587 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

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

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

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.
Virgin Atlantic
7.4
Good
642 reviews
Delta
8.0
Very good
7,929 reviews
Check prices

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

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?

    Currently priced at C$ 994, Scandinavian Airlines will fly you from Seattle to Lisbon and back. In addition to Scandinavian Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and KLM - these airlines can fly you to your destination from C$ 1,038 and C$ 1,121, respectively. These flights start at 26% lower than the current average price 3 months from now.

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

    The cheapest airlines for a one-way flight from Seattle to Lisbon are Icelandair (C$ 581), Lufthansa (C$ 822), and United Airlines (C$ 829).

  • 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 vacation 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 C$ 482). Flying from Seattle to Lisbon in July is currently the most expensive (average of C$ 780). 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
Sintra
Costa da Caparica
Óbidos
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Top airline flying from Seattle to Lisbon

Discover the top airline that operate flights from Seattle to Lisbon. 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 629,999 searches. Data last updated 29 April 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapestC$ 943AverageC$ 1,308FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Seattle to Lisbon?

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Can Cheapflights find flights from Seattle to Lisbon with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to Lisbon flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Seattle to Lisbon become cheaper?

Yes, Cheapflights offers price alerts on Seattle to Lisbon flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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