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Cheap flights from Seattle to Lisbon from C$ 822

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
22 Apr — 29 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 17 April 2025.

Round-trip from

C$ 989

One-way from

C$ 822

Popular in

June

Cheapest in

January

Average price

C$ 1,260
18/8-26/8
  • 18/8-26/8
  • 4 total stops
  • 55h 48m total
  • Seattle to Lisbon
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Lufthansa
  • Lufthansa
  • 1/10
  • 2 total stops
  • 15h 20m total
  • Seattle to Lisbon
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 372 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 62 potential savings vs. average RT 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 17 April 2025.

Thu 25/1210:26 p.m.SEA - LIS
1 stop25h 44mMultiple Airlines
Tue 30/126:10 a.m.LIS - SEA
1 stop15h 10mMultiple Airlines
Deal found 17/4C$ 976
Mon 20/102:20 p.m.SEA - LIS
1 stop17h 05mLufthansa
Mon 27/105:00 a.m.LIS - SEA
1 stop15h 10mLufthansa
Deal found 17/4C$ 990
Sat 25/108:45 a.m.SEA - LIS
2 stops16h 25mUnited Airlines
Sat 1/115:00 a.m.LIS - SEA
1 stop15h 10mUnited Airlines
Deal found 17/4C$ 1,043
Sat 20/97:00 p.m.SEA - LIS
1 stop18h 20mIcelandair
Thu 25/910:20 p.m.LIS - SEA
1 stop30h 20mIcelandair
Deal found 17/4C$ 1,086
Sat 16/84:00 p.m.SEA - LIS
2 stops22h 05mScandinavian Airlines
Sun 31/87:15 a.m.LIS - SEA
1 stop14h 35mScandinavian Airlines
Deal found 17/4C$ 1,118
Mon 5/512:45 p.m.SEA - LIS
2 stops26h 35mSWISS
Thu 15/55:55 a.m.LIS - SEA
2 stops20h 38mSWISS
Deal found 17/4C$ 1,142
Thu 18/912:30 p.m.SEA - LIS
1 stop27h 05mTurkish Airlines
Wed 1/104:30 p.m.LIS - SEA
1 stop26h 05mTurkish Airlines
Deal found 17/4C$ 1,152
Tue 23/98:20 p.m.SEA - LIS
1 stop29h 45mBritish Airways
Mon 29/95:05 p.m.LIS - SEA
1 stop26h 05mBritish Airways
Deal found 17/4C$ 1,190
Mon 22/97:20 a.m.SEA - LIS
1 stop16h 40mDelta
Mon 29/99:50 a.m.LIS - SEA
2 stops21h 34mDelta
Deal found 17/4C$ 1,276
Wed 24/97:55 a.m.SEA - LIS
2 stops31h 15mFinnair
Mon 29/96:35 a.m.LIS - SEA
2 stops22h 00mFinnair
Deal found 17/4C$ 1,546
Mon 22/96:45 p.m.SEA - LIS
1 stop18h 50mAer Lingus
Sat 27/910:15 p.m.LIS - SEA
1 stop26h 44mAer Lingus
Deal found 17/4C$ 1,854

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 17 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 18/8

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

2 stops21h 50m

Lisbon Humberto Delgado

Tue 26/8

9:05 p.m.-11:03 p.m.

2 stops33h 58m

C$ 989

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 20/9

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

1 stop18h 20m

Lisbon Humberto Delgado

Thu 25/9

10:20 p.m.-8:40 p.m.

1 stop30h 20m

C$ 1,086

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 13/5

7:20 a.m.-9:20 a.m.

1 stop18h 00m

Lisbon Humberto Delgado

Tue 20/5

11:25 a.m.-3:58 p.m.

2 stops36h 33m

C$ 1,090

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Sat 16/8

4:00 p.m.-10:05 p.m.

2 stops22h 05m

Lisbon Humberto Delgado

Sun 31/8

7:15 a.m.-1:50 p.m.

1 stop14h 35m

C$ 1,118

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 6/10

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

2 stops15h 20m

Lisbon Humberto Delgado

Mon 27/10

2:10 p.m.-2:20 p.m.

1 stop31h 10m

C$ 1,126

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 5/5

12:45 p.m.-11:20 p.m.

2 stops26h 35m

Lisbon Humberto Delgado

Thu 15/5

5:55 a.m.-6:33 p.m.

2 stops20h 38m

C$ 1,142

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Thu 18/9

7:10 p.m.-11:35 p.m.

1 stop20h 25m

Lisbon Humberto Delgado

Thu 25/9

4:45 p.m.-5:15 p.m.

1 stop32h 30m

C$ 1,152

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Tue 23/9

8:20 p.m.-10:05 a.m.

1 stop29h 45m

Lisbon Humberto Delgado

Mon 29/9

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

1 stop26h 05m

C$ 1,190

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Mon 22/9

7:20 a.m.-8:00 a.m.

1 stop16h 40m

Lisbon Humberto Delgado

Mon 29/9

9:50 a.m.-11:24 p.m.

2 stops21h 34m

C$ 1,276

SeattleLisbon

SEA - LIS

SEALIS

Seattle/Tacoma Intl

Wed 24/9

7:55 a.m.-11:10 p.m.

2 stops31h 15m

Lisbon Humberto Delgado

Mon 29/9

6:35 a.m.-8:35 p.m.

2 stops22h 00m

C$ 1,546

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/4

Showing 1-10 of 16 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 11 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$ 795). 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 17 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 17 April 2025.
See what other customers who have flown with Delta, Finnair 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
7,917 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

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
7,917 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

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
1,269 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

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
1,580 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

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
8,667 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

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.
Turkish Airlines
7.3
Good
3,769 reviews
Delta
8.0
Very good
7,917 reviews
Check prices

Boarding

8.2

Overall

8.0

Food

7.3

Crew

8.5

Comfort

7.9

Entertainment

7.9

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$ 1,086, Icelandair will fly you from Seattle to Lisbon and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and Scandinavian Airlines - these airlines can fly you to your destination from C$ 1,090 and C$ 1,118, respectively. These flights start at 20% 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 United Airlines (C$ 822), SWISS (C$ 954), and Air Europa (C$ 1,088).

  • 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$ 795). 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 17 April 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapestC$ 943AverageC$ 1,309FlexibilityNo 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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Why should you use Cheapflights to find cheap flight tickets 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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