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

Lufthansa, 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.

$545 Cheap Flights from Basel to Seattle in 2025

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 $585 to $623. The lowest price recently found on this route was $551.

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Find the cheapest flights from Basel to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

6:40 am - 11:35 amBSL-SEA

13h 55m1 stop

2:52 pm - 10:50 pmSEA-BSL

22h 58m2 stops

$551

Find Deal

Wed, Oct 1 - Thu, Oct 16

6:40 am - 11:35 amBSL-SEA

13h 55m1 stop

1:30 pm - 10:50 pmSEA-BSL

24h 20m1 stop

$552American Airlines

Find Deal

Wed, Oct 1 - Fri, Oct 17

6:40 am - 11:35 amBSL-SEA

13h 55m1 stop

10:39 am - 6:30 pmSEA-BSL

22h 51m2 stops

$553British Airways

Find Deal

Wed, Oct 1 - Tue, Oct 14

6:35 am - 7:39 pmBSL-SEA

22h 04m2 stops

12:19 pm - 10:40 pmSEA-BSL

25h 21m2 stops

$556American Airlines

Find Deal

Sat, Aug 23 - Wed, Sep 24

6:40 am - 8:09 pmBSL-SEA

22h 29m2 stops

2:52 pm - 10:50 pmSEA-BSL

22h 58m2 stops

$557American Airlines

Find Deal

Wed, Oct 1 - Fri, Oct 17

6:40 am - 8:09 pmBSL-SEA

22h 29m2 stops

10:39 am - 6:30 pmSEA-BSL

22h 51m2 stops

$559British Airways

Find Deal

Wed, Oct 1 - Tue, Oct 14

6:15 am - 11:45 amBSL-SEA

14h 30m1 stop

1:30 pm - 1:10 pmSEA-BSL

14h 40m1 stop

$567Delta

Find Deal

Fri, Sep 5 - Sun, Sep 14

10:10 am - 4:05 pmBSL-SEA

14h 55m1 stop

1:30 pm - 1:10 pmSEA-BSL

14h 40m1 stop

$568Delta

Find Deal

Fri, Sep 12 - Sun, Sep 21

6:15 am - 11:45 amBSL-SEA

14h 30m1 stop

7:10 am - 9:35 amSEA-BSL

17h 25m2 stops

$573Delta

Find Deal

Fri, Sep 12 - Sun, Sep 21

10:15 am - 11:45 amBSL-SEA

34h 30m1 stop

1:30 pm - 1:10 pmSEA-BSL

14h 40m1 stop

$610Air France

Find Deal

Fri, Sep 5 - Sun, Sep 14

British Airways flights from Basel to Seattle

Our best British Airways deals on Basel to Seattle flight tickets

British Airways

Oct 1

BSL6:40 amBasel EuroAirport Swiss

13h 55m

1 stop

SEA11:35 amSeattle/Tacoma Intl

Oct 14

SEA10:39 amSeattle/Tacoma Intl

22h 51m

2 stops

BSL6:30 pmBasel EuroAirport Swiss

$553

Find similar

British Airways

Oct 1

BSL6:40 amBasel EuroAirport Swiss

22h 29m

2 stops

SEA8:09 pmSeattle/Tacoma Intl

Oct 14

SEA10:39 amSeattle/Tacoma Intl

22h 51m

2 stops

BSL6:30 pmBasel EuroAirport Swiss

$559

Find similar

British Airways

Sep 12

BSL7:15 pmBasel EuroAirport Swiss

25h 20m

1 stop

SEA11:35 amSeattle/Tacoma Intl

Sep 19

SEA3:00 pmSeattle/Tacoma Intl

22h 50m

2 stops

BSL10:50 pmBasel EuroAirport Swiss

$589

Find similar

Delta flights from Basel to Seattle

Our best Delta deals on Basel to Seattle flight tickets

Delta

Sep 5

BSL6:15 amBasel EuroAirport Swiss

14h 30m

1 stop

SEA11:45 amSeattle/Tacoma Intl

Sep 14

SEA1:30 pmSeattle/Tacoma Intl

14h 40m

1 stop

BSL1:10 pmBasel EuroAirport Swiss

$567

Find similar

Delta

Sep 12

BSL10:10 amBasel EuroAirport Swiss

14h 55m

1 stop

SEA4:05 pmSeattle/Tacoma Intl

Sep 21

SEA1:30 pmSeattle/Tacoma Intl

14h 40m

1 stop

BSL1:10 pmBasel EuroAirport Swiss

$568

Find similar

Delta

Sep 12

BSL6:15 amBasel EuroAirport Swiss

14h 30m

1 stop

SEA11:45 amSeattle/Tacoma Intl

Sep 21

SEA7:10 amSeattle/Tacoma Intl

17h 25m

2 stops

BSL9:35 amBasel EuroAirport Swiss

$573

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Wed 10/1

6:40 am-11:35 am

1 stop13h 55m

Seattle/Tacoma Intl

Thu 10/16

2:52 pm-10:50 pm

2 stops22h 58m

$551

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Wed 10/1

6:40 am-11:35 am

1 stop13h 55m

Seattle/Tacoma Intl

Fri 10/17

1:30 pm-10:50 pm

1 stop24h 20m

$552

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Wed 10/1

6:40 am-11:35 am

1 stop13h 55m

Seattle/Tacoma Intl

Tue 10/14

10:39 am-6:30 pm

2 stops22h 51m

$553

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 8/23

6:35 am-7:39 pm

2 stops22h 04m

Seattle/Tacoma Intl

Wed 9/24

12:19 pm-10:40 pm

2 stops25h 21m

$556

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Wed 10/1

6:40 am-8:09 pm

2 stops22h 29m

Seattle/Tacoma Intl

Fri 10/17

2:52 pm-10:50 pm

2 stops22h 58m

$557

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Wed 10/1

6:40 am-8:09 pm

2 stops22h 29m

Seattle/Tacoma Intl

Tue 10/14

10:39 am-6:30 pm

2 stops22h 51m

$559

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 9/5

6:15 am-11:45 am

1 stop14h 30m

Seattle/Tacoma Intl

Sun 9/14

1:30 pm-1:10 pm

1 stop14h 40m

$567

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 9/12

10:10 am-4:05 pm

1 stop14h 55m

Seattle/Tacoma Intl

Sun 9/21

1:30 pm-1:10 pm

1 stop14h 40m

$568

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 9/12

6:15 am-11:45 am

1 stop14h 30m

Seattle/Tacoma Intl

Sun 9/21

7:10 am-9:35 am

2 stops17h 25m

$573

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 9/5

10:15 am-11:45 am

1 stop34h 30m

Seattle/Tacoma Intl

Sun 9/14

1:30 pm-1:10 pm

1 stop14h 40m

$610

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

Best Price Found	$599
Fastest flight time	12h 35m
Direct flights	None
Airports in Seattle	1 airport

The best one-way flight to Seattle from Basel in the past 72 hours is $599. The best round-trip flight deal from Basel to Seattle found on momondo in the last 72 hours is $551.

The fastest flight from Basel to Seattle takes 12h 35m

There are no direct flights from Basel to Seattle. Popular non-direct route for this connection is Basel EuroAirport Swiss - Seattle/Tacoma Intl Airport.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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 13h 55m.
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.

Leavenworth

Tacoma

SeaTac

Ocean Shores

Olympia

Renton

Kent

Federal Way

Puyallup

Lynnwood

Marysville

Tukwila

Kirkland

Lakewood

Fife

Centralia

Cle Elum

Shoreline

Westport

Redmond

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.