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$464+ Cheap flights from Basel EuroAirport Swiss (BSL) to Seattle (SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
BSL — SEA
Jan 21 — Jan 281
Tue 1/21
Tue 1/28
1 adult, Economy
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Cheap flight deals from Basel to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Basel (BSL) to Seattle (SEA). 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 January 16, 2025.

Round-trip from

$464
(Expedia)
From Basel EuroAirport Swiss to Seattle/Tacoma Intl
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Find flight deals from Basel to Seattle

Cheapest flights from Basel to Seattle
Explore the most affordable flight options available from Basel to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 16, 2025.

This British Airways deal was found by Cheapflights users on 1/15. 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.
Tue 4/87:10 pmBSL - SEA
1 stop25h 25mBritish Airways
Wed 4/302:55 pmSEA - BSL
2 stops19h 00mBritish Airways
Deal found 1/15$472
This American Airlines deal was found by Cheapflights users on 1/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/911:20 amBSL - SEA
2 stops41h 44mAmerican Airlines
Tue 2/181:33 pmSEA - BSL
2 stops23h 47mAmerican Airlines
Deal found 1/16$482
This Delta deal was found by Cheapflights users on 1/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/106:15 amBSL - SEA
1 stop18h 45mDelta
Tue 4/229:40 amSEA - BSL
2 stops18h 30mDelta
Deal found 1/15$512
This Air France deal was found by Cheapflights users on 1/15. 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.
Thu 1/306:05 amBSL - SEA
2 stops19h 50mKLM
Mon 2/39:25 amSEA - BSL
2 stops16h 15mKLM
Deal found 1/15$519
This Expedia deal was found by Cheapflights users on 1/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/176:15 amBSL - SEA
1 stop14h 25mAir France
Sat 5/315:35 pmSEA - BSL
1 stop31h 00mAir France
Deal found 1/15$542
This Air France deal was found by Cheapflights users on 1/15. 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.
Sat 8/236:15 amBSL - SEA
2 stops17h 25mMultiple Airlines
Wed 9/245:30 pmSEA - BSL
1 stop19h 15mMultiple Airlines
Deal found 1/15$554
This United Airlines deal was found by Cheapflights users on 1/16. 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.
Fri 10/106:20 amBSL - SEA
2 stops16h 56mUnited Airlines
Sat 10/257:03 amSEA - BSL
3 stops21h 22mUnited Airlines
Deal found 1/16$557
This Air Canada deal was found by Cheapflights users on 1/16. 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.
Fri 10/106:20 amBSL - SEA
2 stops16h 56mAir Canada
Fri 10/241:45 pmSEA - BSL
2 stops15h 00mAir Canada
Deal found 1/16$595
This Gotogate deal was found by Cheapflights users on 1/15. 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.
Sat 5/176:05 amBSL - SEA
1 stop14h 50mLufthansa
Sat 5/311:45 pmSEA - BSL
2 stops57h 10mLufthansa
Deal found 1/15$609
This Turkish Airlines deal was found by Cheapflights users on 1/15. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/1311:00 amBSL - SEA
2 stops63h 59mTurkish Airlines
Tue 3/189:20 amSEA - BSL
2 stops23h 50mTurkish Airlines
Deal found 1/15$3,901

Find flights from Basel to Seattle within your budget

Customize your flight search to find flights from Basel to Seattle 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 January 16, 2025.

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Route

Depart

Return

Price

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 4/10

6:10 am-11:35 am

1 stop14h 25m

Seattle/Tacoma Intl

Tue 4/22

1:30 pm-10:55 am

1 stop12h 25m

$464

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sun 2/9

11:20 am-8:04 pm

2 stops41h 44m

Seattle/Tacoma Intl

Tue 2/18

1:33 pm-10:20 pm

2 stops23h 47m

$482

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 5/17

10:15 am-3:55 pm

1 stop14h 40m

Seattle/Tacoma Intl

Sat 5/31

5:35 pm-9:35 am

1 stop31h 00m

$550

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 5/17

6:15 am-2:43 pm

2 stops17h 28m

Seattle/Tacoma Intl

Sat 5/31

8:50 am-1:50 pm

2 stops20h 00m

$565

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sun 2/9

9:35 am-1:20 pm

1 stop12h 45m

Seattle/Tacoma Intl

Tue 2/18

3:10 pm-12:25 pm

1 stop12h 15m

$574

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sun 2/9

9:35 am-2:00 pm

2 stops37h 25m

Seattle/Tacoma Intl

Tue 2/18

4:58 pm-4:20 pm

3 stops38h 22m

$579

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 4/5

6:05 am-8:54 pm

2 stops23h 49m

Seattle/Tacoma Intl

Sat 4/19

5:05 pm-5:50 pm

1 stop15h 45m

$1,565

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 5/17

6:55 pm-5:10 pm

1 stop31h 15m

Seattle/Tacoma Intl

Sat 5/31

7:05 pm-9:40 am

1 stop29h 35m

$4,602

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 6/7

9:20 pm-11:25 am

1 stop23h 05m

$637

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 5/30

6:00 am-11:35 am

1 stop14h 35m

$642

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/16

Showing 1-10 of 12 results
1
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Best time to book a flight from Basel to Seattle

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

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

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated January 16, 2025.
To help decide which airline to fly from Basel to Seattle, see what other customers have to say about United Airlines, British Airways and KLM. 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
8,511 reviews

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,511 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,339 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,965 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Turkish Airlines
7.3
Good
3,921 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,511 reviews

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.6

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Basel to Seattle. 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 Basel EuroAirport Swiss to Seattle round-trip?

    British Airways, at $464, was found to be the cheapest airline from Basel EuroAirport Swiss to Seattle.Alternate airlines to your destination round-trip include American Airlines and KLM.

  • What are the cheapest airlines to fly from Basel EuroAirport Swiss to Seattle one-way?

    For one-way options, check prices for British Airways. According to our data, you can fly for as low as $642. Users have also found prices from $654 and $1,660 on American Airlines and United Airlines, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Basel to Seattle 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 Basel EuroAirport Swiss to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Basel EuroAirport Swiss to Seattle (average of $238). Flying from Basel EuroAirport Swiss to Seattle in July is currently the most expensive (average of $411). 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

Traveling to a place near Basel EuroAirport Swiss?

Book flights to Basel EuroAirport Swiss if you plan to visit one of these locations
SeaTac
Tukwila
Renton
Tacoma
Lacey
Federal Way
Ocean Shores
Leavenworth
Olympia
Marysville
Centralia
Cle Elum
Mukilteo
Aberdeen
Lakewood
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale

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Alternative routes for Basel to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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