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

British Airways and American Airlines 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.

$344 Cheap Flights from Basel to Seattle in 2025/26

Q: What is the typical price of a round-trip flight between Basel and Seattle?

Prices are currently low for flights on this route. Typical prices usually range from $777 to $1,414. The lowest price recently found on this route was $612.

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Find the cheapest flights from Basel to Seattle

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6:05 am - 4:55 pm

BSL

SEA

19h 50m1 stop

9:45 pm - 3:05 pm

SEA

BSL

32h 20m2 stops

$612British Airways

Thu, Jan 15 - Mon, Jan 19

6:05 am - 4:55 pm

BSL

SEA

19h 50m1 stop

6:50 pm - 3:05 pm

SEA

BSL

35h 15m1 stop

$614American Airlines

Thu, Feb 19 - Mon, Mar 2

11:05 am - 4:55 pm

BSL

SEA

14h 50m1 stop

6:50 pm - 6:15 pm

SEA

BSL

14h 25m1 stop

$616British Airways

Thu, Jan 15 - Mon, Jan 19

6:05 am - 8:45 pm

BSL

SEA

23h 40m2 stops

9:45 pm - 3:05 pm

SEA

BSL

32h 20m2 stops

$620American Airlines

Thu, Jan 15 - Mon, Jan 19

9:50 am - 1:20 pm

BSL

SEA

12h 30m1 stop

8:59 am - 12:30 pm

SEA

BSL

19h 31m3 stops

$681United Airlines

Fri, Mar 6 - Tue, Mar 10

9:50 am - 10:59 pm

BSL

SEA

22h 09m2 stops

8:59 am - 12:30 pm

SEA

BSL

19h 31m3 stops

$687United Airlines

Fri, Mar 6 - Tue, Mar 10

6:50 pm - 5:55 pm

BSL

SEA

31h 05m1 stop

8:10 am - 8:10 pm

SEA

BSL

28h 00m2 stops

$858Multiple Airlines

Sun, Mar 15 - Fri, Mar 20

6:50 pm - 5:55 pm

BSL

SEA

31h 05m1 stop

3:10 pm - 9:50 am

SEA

BSL

34h 40m1 stop

$860Multiple Airlines

Sun, Mar 15 - Fri, Mar 20

6:35 am - 9:54 pm

BSL

SEA

23h 19m2 stops

8:10 am - 10:05 am

SEA

BSL

17h 55m2 stops

$864Multiple Airlines

Sun, Mar 15 - Fri, Mar 20

9:00 am - 6:44 pm

BSL

SEA

42h 44m2 stops

6:50 pm - 7:40 pm

SEA

BSL

15h 50m1 stop

$997Multiple Airlines

Fri, May 1 - Wed, May 20

American Airlines flights from Basel to Seattle

Our best American Airlines deals on Basel to Seattle flight tickets

American Airlines

Feb 19

BSL6:05 amBasel EuroAirport Swiss

19h 50m

1 stop

SEA4:55 pmSeattle/Tacoma Intl

Mar 2

SEA6:50 pmSeattle/Tacoma Intl

35h 15m

1 stop

BSL3:05 pmBasel EuroAirport Swiss

$614

Find similar

American Airlines

Jan 15

BSL6:05 amBasel EuroAirport Swiss

23h 40m

2 stops

SEA8:45 pmSeattle/Tacoma Intl

Jan 19

SEA9:45 pmSeattle/Tacoma Intl

32h 20m

2 stops

BSL3:05 pmBasel EuroAirport Swiss

$620

Find similar

United Airlines flights from Basel to Seattle

Our best United Airlines deals on Basel to Seattle flight tickets

United Airlines

Mar 6

BSL9:50 amBasel EuroAirport Swiss

12h 30m

1 stop

SEA1:20 pmSeattle/Tacoma Intl

Mar 10

SEA8:59 amSeattle/Tacoma Intl

19h 31m

3 stops

BSL12:30 pmBasel EuroAirport Swiss

$681

Find similar

United Airlines

Mar 6

BSL9:50 amBasel EuroAirport Swiss

22h 09m

2 stops

SEA10:59 pmSeattle/Tacoma Intl

Mar 10

SEA8:59 amSeattle/Tacoma Intl

19h 31m

3 stops

BSL12:30 pmBasel EuroAirport Swiss

$687

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 1/15

6:05 am-4:55 pm

1 stop19h 50m

Seattle/Tacoma Intl

Mon 1/19

9:45 pm-3:05 pm

2 stops32h 20m

$612

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 2/19

6:05 am-4:55 pm

1 stop19h 50m

Seattle/Tacoma Intl

Mon 3/2

6:50 pm-3:05 pm

1 stop35h 15m

$614

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 1/15

11:05 am-4:55 pm

1 stop14h 50m

Seattle/Tacoma Intl

Mon 1/19

6:50 pm-6:15 pm

1 stop14h 25m

$616

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 1/15

6:05 am-8:45 pm

2 stops23h 40m

Seattle/Tacoma Intl

Mon 1/19

9:45 pm-3:05 pm

2 stops32h 20m

$620

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 3/6

9:50 am-1:20 pm

1 stop12h 30m

Seattle/Tacoma Intl

Tue 3/10

8:59 am-12:30 pm

3 stops19h 31m

$681

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 3/6

9:50 am-10:59 pm

2 stops22h 09m

Seattle/Tacoma Intl

Tue 3/10

8:59 am-12:30 pm

3 stops19h 31m

$687

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sun 3/15

6:50 pm-5:55 pm

1 stop31h 05m

Seattle/Tacoma Intl

Fri 3/20

8:10 am-8:10 pm

2 stops28h 00m

$858

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sun 3/15

6:50 pm-5:55 pm

1 stop31h 05m

Seattle/Tacoma Intl

Fri 3/20

3:10 pm-9:50 am

1 stop34h 40m

$860

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sun 3/15

6:35 am-9:54 pm

2 stops23h 19m

Seattle/Tacoma Intl

Fri 3/20

8:10 am-10:05 am

2 stops17h 55m

$864

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 5/1

9:00 am-6:44 pm

2 stops42h 44m

Seattle/Tacoma Intl

Wed 5/20

6:50 pm-7:40 pm

1 stop15h 50m

$997

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?

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Basel is on a Thursday. momondo users have found tickets for Thursday departures for as low as $547. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Basel because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,021.

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 45m
Direct flights	None

The fastest flight from Basel to Seattle takes 14h 45m

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

Search flight deals

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 45m.
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

Lynnwood

Kent

Marysville

Puyallup

Redmond

Tukwila

Cle Elum

Federal Way

Lakewood

Fife

Centralia

Westport

Kirkland

Shoreline

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.