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

British Airways is the most popular carrier operating from Basel EuroAirport Swiss to Seattle/Tacoma Intl

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

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

How old do you have to be to fly from Basel EuroAirport Swiss 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 EuroAirport Swiss to Seattle/Tacoma Intl Airport.

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

The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$459 Cheap Flights from Basel EuroAirport Swiss to Seattle in 2026

Find the cheapest flights from Basel EuroAirport Swiss to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:40 am - 9:36 pm

BSL

SEA

23h 56m

2 stops

1:40 pm - 6:20 pm

SEA

BSL

19h 40m

2 stops

$707Multiple Airlines

Mon, Sep 14 - Mon, Sep 21

6:00 am - 11:55 am

BSL

SEA

14h 55m

1 stop

6:50 pm - 7:35 pm

SEA

BSL

15h 45m

1 stop

$730United Airlines

Thu, Sep 3 - Sun, Sep 6

6:05 am - 11:55 am

BSL

SEA

14h 50m

1 stop

11:03 am - 7:35 pm

SEA

BSL

23h 32m

2 stops

$733United Airlines

Tue, Sep 1 - Mon, Sep 14

6:00 am - 11:26 pm

BSL

SEA

26h 26m

2 stops

6:50 pm - 7:35 pm

SEA

BSL

15h 45m

1 stop

$736United Airlines

Thu, Sep 3 - Sun, Sep 6

6:05 am - 4:07 pm

BSL

SEA

19h 02m

2 stops

11:03 am - 7:35 pm

SEA

BSL

23h 32m

2 stops

$738United Airlines

Tue, Sep 1 - Mon, Sep 14

6:00 am - 11:55 am

BSL

SEA

14h 55m

1 stop

8:40 am - 1:40 pm

SEA

BSL

20h 00m

2 stops

$739United Airlines

Thu, Sep 3 - Wed, Sep 9

6:00 am - 11:55 am

BSL

SEA

14h 55m

1 stop

11:00 pm - 10:35 am

SEA

BSL

26h 35m

2 stops

$740United Airlines

Thu, Sep 3 - Wed, Sep 9

2:50 pm - 11:26 pm

BSL

SEA

17h 36m

2 stops

7:00 am - 9:55 am

SEA

BSL

17h 55m

2 stops

$743United Airlines

Thu, Sep 3 - Sun, Sep 6

6:00 am - 11:55 am

BSL

SEA

14h 55m

1 stop

6:50 pm - 7:35 pm

SEA

BSL

15h 45m

1 stop

$744Lufthansa

Thu, Sep 10 - Wed, Sep 16

6:00 am - 4:07 pm

BSL

SEA

19h 07m

2 stops

7:00 am - 1:40 pm

SEA

BSL

21h 40m

2 stops

$745United Airlines

Thu, Sep 3 - Wed, Sep 9

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KLM flights from Basel EuroAirport Swiss to Seattle

Our best KLM deals on Basel EuroAirport Swiss to Seattle flight tickets

KLM

Aug 25

BSL6:30 amBasel EuroAirport Swiss

14h 07m

1 stop

SEA11:37 amSeattle/Tacoma Intl

Sep 1

SEA2:30 pmSeattle/Tacoma Intl

18h 25m

2 stops

BSL5:55 pmBasel EuroAirport Swiss

$768

KLM

Aug 25

BSL6:30 amBasel EuroAirport Swiss

18h 43m

2 stops

SEA4:13 pmSeattle/Tacoma Intl

Sep 1

SEA2:30 pmSeattle/Tacoma Intl

18h 25m

2 stops

BSL5:55 pmBasel EuroAirport Swiss

$774

KLM

Aug 25

BSL10:15 amBasel EuroAirport Swiss

15h 12m

1 stop

SEA4:27 pmSeattle/Tacoma Intl

Sep 1

SEA1:30 pmSeattle/Tacoma Intl

15h 15m

1 stop

BSL1:45 pmBasel EuroAirport Swiss

$823

United Airlines flights from Basel EuroAirport Swiss to Seattle

Our best United Airlines deals on Basel EuroAirport Swiss to Seattle flight tickets

United Airlines

Sep 3

BSL6:00 amBasel EuroAirport Swiss

14h 55m

1 stop

SEA11:55 amSeattle/Tacoma Intl

Sep 6

SEA6:50 pmSeattle/Tacoma Intl

15h 45m

1 stop

BSL7:35 pmBasel EuroAirport Swiss

$730

United Airlines

Sep 1

BSL6:05 amBasel EuroAirport Swiss

14h 50m

1 stop

SEA11:55 amSeattle/Tacoma Intl

Sep 14

SEA11:03 amSeattle/Tacoma Intl

23h 32m

2 stops

BSL7:35 pmBasel EuroAirport Swiss

$733

United Airlines

Sep 3

BSL6:00 amBasel EuroAirport Swiss

26h 26m

2 stops

SEA11:26 pmSeattle/Tacoma Intl

Sep 6

SEA6:50 pmSeattle/Tacoma Intl

15h 45m

1 stop

BSL7:35 pmBasel EuroAirport Swiss

$736

momondo Fare Finder

Use the filters below to find and compare flights from Basel EuroAirport Swiss to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 9/14

6:40 am-9:36 pm

2 stops23h 56m

Seattle/Tacoma Intl

Mon 9/21

1:40 pm-6:20 pm

2 stops19h 40m

$707

Quickest round-trip

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 9/3

6:00 am-11:55 am

1 stop14h 55m

Seattle/Tacoma Intl

Sun 9/6

6:50 pm-7:35 pm

1 stop15h 45m

$730

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Tue 9/1

6:05 am-11:55 am

1 stop14h 50m

Seattle/Tacoma Intl

Mon 9/14

11:03 am-7:35 pm

2 stops23h 32m

$733

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 9/3

6:00 am-11:26 pm

2 stops26h 26m

Seattle/Tacoma Intl

Sun 9/6

6:50 pm-7:35 pm

1 stop15h 45m

$736

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Tue 9/1

6:05 am-4:07 pm

2 stops19h 02m

Seattle/Tacoma Intl

Mon 9/14

11:03 am-7:35 pm

2 stops23h 32m

$738

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 9/3

6:00 am-11:55 am

1 stop14h 55m

Seattle/Tacoma Intl

Wed 9/9

8:40 am-1:40 pm

2 stops20h 00m

$739

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 9/3

6:00 am-11:55 am

1 stop14h 55m

Seattle/Tacoma Intl

Wed 9/9

11:00 pm-10:35 am

2 stops26h 35m

$740

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 9/3

2:50 pm-11:26 pm

2 stops17h 36m

Seattle/Tacoma Intl

Sun 9/6

7:00 am-9:55 am

2 stops17h 55m

$743

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 9/10

6:00 am-11:55 am

1 stop14h 55m

Seattle/Tacoma Intl

Wed 9/16

6:50 pm-7:35 pm

1 stop15h 45m

$744

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 9/3

6:00 am-4:07 pm

2 stops19h 07m

Seattle/Tacoma Intl

Wed 9/9

7:00 am-1:40 pm

2 stops21h 40m

$745

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 EuroAirport Swiss 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, September is the cheapest month to fly from Basel EuroAirport Swiss 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 September, then you should wait until March to fly from Basel EuroAirport Swiss, when ticket prices are also cheap, with an average price of $0.

When to book flights from Basel EuroAirport Swiss to Seattle

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

Estimated round-trip price

Cheap Basel EuroAirport Swiss to Seattle (BSL to SEA) flight deals and tips

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

Fastest flight time	14h 50m
Direct flights	None

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

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

Search flight deals

Frequently asked questions about flying from Basel EuroAirport Swiss to Seattle

How far is Basel EuroAirport Swiss to Seattle/Tacoma Intl by plane?
The straight-line distance from Basel EuroAirport Swiss to Seattle/Tacoma Intl is 5198.6 mi. 14h 50m is a normal flight duration for this route.
When did momondo last update prices for flights from Basel EuroAirport Swiss to Seattle/Tacoma Intl Airport?
Prices for flights from Basel EuroAirport Swiss to Seattle/Tacoma Intl Airport refresh daily.
How old do you have to be to fly from Basel EuroAirport Swiss 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 EuroAirport Swiss to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Kent

Lynnwood

Redmond

Lakewood

Puyallup

Tukwila

Federal Way

Fife

Cle Elum

Marysville

Kirkland

Centralia

Shoreline

Lacey

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Basel.

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

Yes. All flights to Seattle from Basel on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Seattle from Basel. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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.