What is the cheapest airline that flies from Basel to Seattle/Tacoma Intl?

British Airways and Delta are the most popular carriers operating from Basel to Seattle/Tacoma Intl

When did momondo last update prices for flights from Basel to Seattle/Tacoma Intl Airport?

Prices for flights from Basel to Seattle/Tacoma Intl Airport refresh daily.

How old do you have to be to fly from Basel to Seattle/Tacoma Intl Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Basel to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$470 Cheap Flights from Basel to Seattle in 2026/27

Find the cheapest flights from Basel to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:30 am - 5:00 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

15h 30m1 stop London Luton

6:45 pm - 8:40 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

16h 55m1 stop London Heathrow

$711Multiple Airlines

Thu, Nov 26 - Fri, Dec 4

6:40 am - 5:00 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

19h 20m1 stop London Gatwick

6:45 pm - 8:40 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

16h 55m1 stop London Heathrow

$725Multiple Airlines

Mon, Nov 23 - Wed, Dec 9

10:45 am - 10:04 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

20h 19m2 stops Paris Charles de Gaulle Los Angeles

7:15 am - 1:55 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

21h 40m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

$758Air France

Thu, Nov 19 - Mon, Nov 23

6:00 am - 11:47 amBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

14h 47m1 stop Amsterdam Schiphol

7:38 am - 10:00 amSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

17h 22m2 stops Boston Logan Intl Paris Charles de Gaulle

$760Delta

Thu, Nov 19 - Mon, Nov 23

11:05 am - 11:25 amBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

33h 20m1 stop London Heathrow

10:51 am - 2:55 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

19h 04m2 stops Chicago O'Hare Intl London Heathrow

$765American Airlines

Mon, Nov 23 - Wed, Dec 9

6:00 am - 11:47 amBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

14h 47m1 stop Amsterdam Schiphol

2:35 pm - 1:25 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

13h 50m1 stop Amsterdam Schiphol

$768Air France

Sun, Nov 22 - Tue, Dec 1

11:05 am - 11:19 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

21h 14m2 stops London Heathrow Charlotte Douglas

10:51 am - 2:55 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

19h 04m2 stops Chicago O'Hare Intl London Heathrow

$771American Airlines

Mon, Nov 23 - Wed, Dec 9

11:05 am - 4:50 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

14h 45m1 stop London Heathrow

2:07 pm - 6:35 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

19h 28m2 stops Dallas/Fort Worth London Heathrow

$773British Airways

Thu, Nov 26 - Fri, Dec 4

4:00 pm - 11:25 amBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

28h 25m1 stop London Heathrow

6:45 pm - 10:15 amSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

30h 30m1 stop London Heathrow

$788British Airways

Fri, Nov 20 - Fri, Nov 27

9:05 pm - 4:50 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

28h 45m1 stop London Heathrow

6:45 pm - 8:00 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

16h 15m1 stop London Heathrow

$790British Airways

Sun, Nov 22 - Tue, Dec 1

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Delta flights from Basel to Seattle

Our best Delta deals on Basel to Seattle flight tickets

Delta

Nov 19

BSL6:00 amBasel EuroAirport Swiss

14h 47m

1 stop

SEA11:47 amSeattle/Tacoma Intl

Nov 23

SEA7:38 amSeattle/Tacoma Intl

17h 22m

2 stops

BSL10:00 amBasel EuroAirport Swiss

$760

Delta

Nov 22

BSL6:00 amBasel EuroAirport Swiss

14h 47m

1 stop

SEA11:47 amSeattle/Tacoma Intl

Dec 1

SEA9:13 amSeattle/Tacoma Intl

19h 42m

2 stops

BSL1:55 pmBasel EuroAirport Swiss

$791

Delta

Nov 20

BSL10:45 amBasel EuroAirport Swiss

19h 15m

2 stops

SEA9:00 pmSeattle/Tacoma Intl

Nov 27

SEA9:25 amSeattle/Tacoma Intl

19h 30m

2 stops

BSL1:55 pmBasel EuroAirport Swiss

$797

United Airlines flights from Basel to Seattle

Our best United Airlines deals on Basel to Seattle flight tickets

United Airlines

Jan 14

BSL6:45 amBasel EuroAirport Swiss

14h 15m

1 stop

SEA12:00 pmSeattle/Tacoma Intl

Jan 17

SEA9:01 amSeattle/Tacoma Intl

19h 59m

2 stops

BSL2:00 pmBasel EuroAirport Swiss

$855

United Airlines

Jan 14

BSL6:45 amBasel EuroAirport Swiss

14h 15m

1 stop

SEA12:00 pmSeattle/Tacoma Intl

Jan 17

SEA9:01 amSeattle/Tacoma Intl

19h 59m

2 stops

BSL2:00 pmBasel EuroAirport Swiss

$857

United Airlines

Jan 14

BSL6:45 amBasel EuroAirport Swiss

14h 15m

1 stop

SEA12:00 pmSeattle/Tacoma Intl

Jan 17

SEA9:01 amSeattle/Tacoma Intl

19h 59m

2 stops

BSL2:00 pmBasel EuroAirport Swiss

$859

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Thu 11/26

10:30 am-5:00 pm

1 stop15h 30m

Seattle/Tacoma Intl

Fri 12/4

6:45 pm-8:40 pm

1 stop16h 55m

$711

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Mon 11/23

6:40 am-5:00 pm

1 stop19h 20m

Seattle/Tacoma Intl

Wed 12/9

6:45 pm-8:40 pm

1 stop16h 55m

$725

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Thu 11/19

10:45 am-10:04 pm

2 stops20h 19m

Seattle/Tacoma Intl

Mon 11/23

7:15 am-1:55 pm

2 stops21h 40m

$758

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Thu 11/19

6:00 am-11:47 am

1 stop14h 47m

Seattle/Tacoma Intl

Mon 11/23

7:38 am-10:00 am

2 stops17h 22m

$760

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Mon 11/23

11:05 am-11:25 am

1 stop33h 20m

Seattle/Tacoma Intl

Wed 12/9

10:51 am-2:55 pm

2 stops19h 04m

$765

Quickest round-trip

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Sun 11/22

6:00 am-11:47 am

1 stop14h 47m

Seattle/Tacoma Intl

Tue 12/1

2:35 pm-1:25 pm

1 stop13h 50m

$768

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Mon 11/23

11:05 am-11:19 pm

2 stops21h 14m

Seattle/Tacoma Intl

Wed 12/9

10:51 am-2:55 pm

2 stops19h 04m

$771

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Thu 11/26

11:05 am-4:50 pm

1 stop14h 45m

Seattle/Tacoma Intl

Fri 12/4

2:07 pm-6:35 pm

2 stops19h 28m

$773

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Fri 11/20

4:00 pm-11:25 am

1 stop28h 25m

Seattle/Tacoma Intl

Fri 11/27

6:45 pm-10:15 am

1 stop30h 30m

$788

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Sun 11/22

9:05 pm-4:50 pm

1 stop28h 45m

Seattle/Tacoma Intl

Tue 12/1

6:45 pm-8:00 pm

1 stop16h 15m

$790

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Basel to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Seattle?

In general, March is the cheapest month to fly from Basel to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you don’t want to visit Seattle in March, then you should wait until January to fly from Basel, when ticket prices are also cheap, with an average price of $0.

When to book flights from Basel to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Basel to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Basel to Seattle (EAP to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Basel to Seattle

Best Price Found	$470
Fastest flight time	18h 09m
Direct flights	None

The best one-way flight to Seattle from Basel in the past 72 hours is $470. The best round-trip flight deal from Basel to Seattle found on momondo in the last 72 hours is $711.

The fastest flight from Basel to Seattle takes 18h 09m

There are no direct flights from Basel to Seattle. There are no popular flight routes from Basel to Seattle.

Search flight deals

Frequently asked questions about flying from Basel to Seattle

How far is Basel to Seattle/Tacoma Intl by plane?
A flight from Basel to Seattle/Tacoma Intl will travel around 5202.0 mi. A reasonable flight in good conditions will take 18h 09m.
When did momondo last update prices for flights from Basel to Seattle/Tacoma Intl Airport?
Prices for flights from Basel to Seattle/Tacoma Intl Airport refresh daily.
How old do you have to be to fly from Basel to Seattle/Tacoma Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Basel to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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Why should I use momondo to find a flight deal from Basel to Seattle?

Finding the right flight to Seattle from Basel is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seattle quick and easy, saving you time and money.

Can I find flights from Basel to Seattle with flexible booking policies on momondo?

momondo does allow users to show only those flights to Seattle from Basel which offer a flexible booking policy as well as other useful filters and features.

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Of course. momondo tracks the price of Basel to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.