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

American Airlines and British Airways 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.

$461 Cheap Flights from Basel to Seattle in 2026

Find the cheapest flights from Basel to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:30 am - 11:47 amBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

14h 17m1 stop Amsterdam Schiphol

5:45 pm - 5:55 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

15h 10m1 stop Amsterdam Schiphol

$738Air France

Thu, Sep 24 - Tue, Sep 29

6:00 am - 11:55 amBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

14h 55m1 stop Frankfurt am Main

6:50 pm - 7:50 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

16h 00m1 stop Munich Franz Josef Strauss

$747Lufthansa

Sat, Sep 19 - Sat, Sep 26

6:00 am - 11:55 amBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

14h 55m1 stop Frankfurt am Main

6:50 pm - 7:35 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

15h 45m1 stop Munich Franz Josef Strauss

$751Lufthansa

Fri, Sep 11 - Wed, Sep 16

6:00 am - 4:42 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

19h 42m2 stops London Heathrow Dallas/Fort Worth

8:24 am - 11:15 amSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

17h 51m2 stops Charlotte Douglas London Heathrow

$756American Airlines

Fri, Sep 11 - Wed, Sep 16

6:10 am - 4:42 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

19h 32m2 stops London Heathrow Dallas/Fort Worth

8:20 am - 11:00 amSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

17h 40m2 stops Philadelphia London Heathrow

$757American Airlines

Thu, Sep 24 - Mon, Sep 28

6:00 am - 12:20 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

15h 20m1 stop Frankfurt am Main

10:48 pm - 10:00 amSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

26h 12m2 stops Newark Frankfurt am Main

$758United Airlines

Fri, Oct 9 - Tue, Oct 13

6:00 am - 12:20 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

15h 20m1 stop Frankfurt am Main

7:00 am - 10:20 amSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

18h 20m2 stops Chicago O'Hare Intl Frankfurt am Main

$759United Airlines

Fri, Oct 9 - Tue, Oct 13

6:00 am - 12:20 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

15h 20m1 stop Frankfurt am Main

10:48 pm - 10:00 amSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

26h 12m2 stops Newark Frankfurt am Main

$760United Airlines

Fri, Oct 9 - Tue, Oct 13

6:00 am - 9:59 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

24h 59m2 stops Frankfurt am Main Los Angeles

5:10 pm - 1:40 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

35h 30m2 stops Chicago O'Hare Intl Frankfurt am Main

$763United Airlines

Fri, Oct 9 - Tue, Oct 13

6:10 am - 4:07 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

18h 57m2 stops Frankfurt am Main Chicago O'Hare Intl

10:42 am - 2:05 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

18h 23m2 stops Chicago O'Hare Intl Frankfurt am Main

$766United Airlines

Wed, Sep 2 - Tue, Sep 8

Cheap last minute flights

Enter your travel dates to find the best prices.

9:35 am - 4:59 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

16h 24m1 stop Munich Franz Josef Strauss

6:50 pm - 7:35 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

15h 45m1 stop Munich Franz Josef Strauss

$908United Airlines

Sat, Aug 8 - Thu, Aug 20

9:35 am - 4:59 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

16h 24m1 stop Munich Franz Josef Strauss

11:03 am - 12:30 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

16h 27m2 stops Denver Intl Munich Franz Josef Strauss

$909United Airlines

Sat, Aug 8 - Thu, Aug 20

9:35 am - 4:59 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

16h 24m1 stop Munich Franz Josef Strauss

2:10 pm - 1:40 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

14h 30m1 stop Frankfurt am Main

$915United Airlines

Sat, Aug 8 - Wed, Aug 19

9:35 am - 4:59 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

16h 24m1 stop Munich Franz Josef Strauss

9:05 am - 2:05 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

20h 00m2 stops San Francisco Frankfurt am Main

$916United Airlines

Sat, Aug 8 - Tue, Aug 18

9:35 am - 4:59 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

16h 24m1 stop Munich Franz Josef Strauss

6:50 pm - 9:15 amSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

29h 25m1 stop Munich Franz Josef Strauss

$932United Airlines

Sat, Aug 8 - Sun, Aug 23

10:55 am - 4:59 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

15h 04m2 stops Frankfurt am Main Munich Franz Josef Strauss

6:50 pm - 7:50 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

16h 00m1 stop Munich Franz Josef Strauss

$940United Airlines

Sat, Aug 8 - Sat, Aug 22

6:00 am - 4:59 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

19h 59m2 stops Frankfurt am Main Munich Franz Josef Strauss

5:20 pm - 7:35 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

17h 15m2 stops San Francisco Munich Franz Josef Strauss

$941United Airlines

Sun, Aug 9 - Thu, Aug 20

10:55 am - 4:59 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

15h 04m2 stops Frankfurt am Main Munich Franz Josef Strauss

8:40 am - 2:00 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

20h 20m2 stops Denver Intl Frankfurt am Main

$948United Airlines

Sat, Aug 8 - Mon, Aug 24

6:00 am - 10:42 pmBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

25h 42m2 stops Frankfurt am Main Vancouver Intl

6:50 pm - 9:10 amSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

29h 20m1 stop Munich Franz Josef Strauss

$986Multiple Airlines

Fri, Aug 7 - Fri, Aug 21

6:00 am - 11:55 amBSL Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl

14h 55m1 stop Frankfurt am Main

6:50 pm - 7:35 pmSEA Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss

15h 45m1 stop Munich Franz Josef Strauss

$1,013Lufthansa

Fri, Aug 7 - Thu, Aug 20

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Delta flights from Basel to Seattle

Our best Delta deals on Basel to Seattle flight tickets

Delta

Sep 3

BSL6:30 amBasel EuroAirport Swiss

14h 17m

1 stop

SEA11:47 amSeattle/Tacoma Intl

Sep 10

SEA1:50 pmSeattle/Tacoma Intl

19h 05m

1 stop

BSL5:55 pmBasel EuroAirport Swiss

$772

Delta

Sep 3

BSL6:30 amBasel EuroAirport Swiss

21h 14m

2 stops

SEA6:44 pmSeattle/Tacoma Intl

Sep 10

SEA5:45 pmSeattle/Tacoma Intl

15h 10m

1 stop

BSL5:55 pmBasel EuroAirport Swiss

$777

Delta

Aug 25

BSL6:30 amBasel EuroAirport Swiss

18h 57m

1 stop

SEA4:27 pmSeattle/Tacoma Intl

Sep 2

SEA1:50 pmSeattle/Tacoma Intl

19h 00m

1 stop

BSL5:50 pmBasel EuroAirport Swiss

$781

United Airlines flights from Basel to Seattle

Our best United Airlines deals on Basel to Seattle flight tickets

United Airlines

Oct 9

BSL6:00 amBasel EuroAirport Swiss

15h 20m

1 stop

SEA12:20 pmSeattle/Tacoma Intl

Oct 13

SEA10:48 pmSeattle/Tacoma Intl

26h 12m

2 stops

BSL10:00 amBasel EuroAirport Swiss

$758

United Airlines

Oct 9

BSL6:00 amBasel EuroAirport Swiss

15h 20m

1 stop

SEA12:20 pmSeattle/Tacoma Intl

Oct 13

SEA10:48 pmSeattle/Tacoma Intl

26h 12m

2 stops

BSL10:00 amBasel EuroAirport Swiss

$760

United Airlines

Oct 9

BSL6:00 amBasel EuroAirport Swiss

24h 59m

2 stops

SEA9:59 pmSeattle/Tacoma Intl

Oct 13

SEA5:10 pmSeattle/Tacoma Intl

35h 30m

2 stops

BSL1:40 pmBasel EuroAirport Swiss

$763

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Thu 9/24

6:30 am-11:47 am

1 stop14h 17m

Seattle/Tacoma Intl

Tue 9/29

5:45 pm-5:55 pm

1 stop15h 10m

$738

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Sat 9/19

6:00 am-11:55 am

1 stop14h 55m

Seattle/Tacoma Intl

Sat 9/26

6:50 pm-7:50 pm

1 stop16h 00m

$747

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Fri 9/11

6:00 am-11:55 am

1 stop14h 55m

Seattle/Tacoma Intl

Wed 9/16

6:50 pm-7:35 pm

1 stop15h 45m

$751

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Fri 9/11

6:00 am-4:42 pm

2 stops19h 42m

Seattle/Tacoma Intl

Wed 9/16

8:24 am-11:15 am

2 stops17h 51m

$756

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Thu 9/24

6:10 am-4:42 pm

2 stops19h 32m

Seattle/Tacoma Intl

Mon 9/28

8:20 am-11:00 am

2 stops17h 40m

$757

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Fri 10/9

6:00 am-12:20 pm

1 stop15h 20m

Seattle/Tacoma Intl

Tue 10/13

10:48 pm-10:00 am

2 stops26h 12m

$758

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Fri 10/9

6:00 am-12:20 pm

1 stop15h 20m

Seattle/Tacoma Intl

Tue 10/13

7:00 am-10:20 am

2 stops18h 20m

$759

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Fri 10/9

6:00 am-12:20 pm

1 stop15h 20m

Seattle/Tacoma Intl

Tue 10/13

10:48 pm-10:00 am

2 stops26h 12m

$760

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Fri 10/9

6:00 am-9:59 pm

2 stops24h 59m

Seattle/Tacoma Intl

Tue 10/13

5:10 pm-1:40 pm

2 stops35h 30m

$763

BaselSeattle

BSL Basel EuroAirport Swiss - SEA Seattle/Tacoma Intl

BSLSEA

Basel EuroAirport Swiss

Wed 9/2

6:10 am-4:07 pm

2 stops18h 57m

Seattle/Tacoma Intl

Tue 9/8

10:42 am-2:05 pm

2 stops18h 23m

$766

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 typical price of a round-trip flight between Basel and Seattle?

Prices are currently typical for flights on this route.

Typical prices usually range from $595 to $849.
The lowest price recently found on this route was $738.

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 August to fly from Basel, when ticket prices are also cheap, with an average price of $633.

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

Fastest flight time	14h 50m
Direct flights	None

The fastest flight from Basel to Seattle takes 14h 50m

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 14h 50m.
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.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Kent

Lynnwood

Redmond

Lakewood

Puyallup

Fife

Federal Way

Tukwila

Cle Elum

Marysville

Kirkland

Centralia

Shoreline

Lacey

Why use momondo?

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.

How can momondo help me find flights from Basel to Seattle?

Once you have performed a search for Basel to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Basel to Seattle right now. Can momondo alert me if prices change?

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.