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

American Airlines is the most popular carrier 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.

$368 Cheap Flights from Basel to Seattle in 2026

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 $591 to $624. The lowest price recently found on this route was $541.

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Find the cheapest flights from Basel to Seattle

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One-way

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6:05 am - 11:04 pm

BSL

SEA

25h 59m

2 stops

10:08 pm - 3:05 pm

SEA

BSL

31h 57m

2 stops

$541American Airlines

Thu, Feb 19 - Mon, Mar 2

6:05 am - 12:24 am

BSL

SEA

27h 19m

2 stops

1:37 pm - 10:20 pm

SEA

BSL

47h 43m

2 stops

$544American Airlines

Thu, Feb 19 - Mon, Mar 2

6:05 am - 4:55 pm

BSL

SEA

19h 50m

1 stop

7:15 am - 6:15 pm

SEA

BSL

26h 00m

2 stops

$548Multiple Airlines

Thu, Feb 26 - Mon, Mar 2

11:05 am - 12:24 am

BSL

SEA

22h 19m

2 stops

6:50 pm - 6:15 pm

SEA

BSL

14h 25m

1 stop

$554Multiple Airlines

Thu, Feb 19 - Mon, Mar 2

11:05 am - 11:04 pm

BSL

SEA

20h 59m

2 stops

6:50 pm - 6:15 pm

SEA

BSL

14h 25m

1 stop

$557Multiple Airlines

Thu, Feb 19 - Mon, Mar 2

11:05 am - 4:55 pm

BSL

SEA

14h 50m

1 stop

6:50 pm - 6:15 pm

SEA

BSL

14h 25m

1 stop

$584British Airways

Thu, Feb 19 - Mon, Mar 2

5:55 pm - 11:40 am

BSL

SEA

26h 45m

1 stop

2:10 pm - 9:50 am

SEA

BSL

34h 40m

1 stop

$600Air France

Thu, Feb 26 - Mon, Mar 2

6:05 am - 11:04 pm

BSL

SEA

25h 59m

2 stops

7:15 am - 6:15 pm

SEA

BSL

26h 00m

2 stops

$602British Airways

Thu, Feb 26 - Mon, Mar 2

8:25 am - 11:55 am

BSL

SEA

12h 30m

1 stop

6:50 pm - 7:50 pm

SEA

BSL

16h 00m

1 stop

$648Lufthansa

Wed, Jul 1 - Sat, Aug 1

9:50 am - 4:59 pm

BSL

SEA

16h 09m

1 stop

11:59 pm - 12:25 pm

SEA

BSL

27h 26m

2 stops

$665United Airlines

Wed, Jul 1 - Sat, Aug 1

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

25h 59m

2 stops

SEA11:04 pmSeattle/Tacoma Intl

Mar 2

SEA10:08 pmSeattle/Tacoma Intl

31h 57m

2 stops

BSL3:05 pmBasel EuroAirport Swiss

$541

American Airlines

Feb 19

BSL6:05 amBasel EuroAirport Swiss

27h 19m

2 stops

SEA12:24 amSeattle/Tacoma Intl

Mar 2

SEA1:37 pmSeattle/Tacoma Intl

47h 43m

2 stops

BSL10:20 pmBasel EuroAirport Swiss

$544

British Airways flights from Basel to Seattle

Our best British Airways deals on Basel to Seattle flight tickets

British Airways

Feb 19

BSL11:05 amBasel EuroAirport Swiss

14h 50m

1 stop

SEA4:55 pmSeattle/Tacoma Intl

Mar 2

SEA6:50 pmSeattle/Tacoma Intl

14h 25m

1 stop

BSL6:15 pmBasel EuroAirport Swiss

$584

British Airways

Feb 26

BSL6:05 amBasel EuroAirport Swiss

25h 59m

2 stops

SEA11:04 pmSeattle/Tacoma Intl

Mar 2

SEA7:15 amSeattle/Tacoma Intl

26h 00m

2 stops

BSL6:15 pmBasel EuroAirport Swiss

$602

British Airways

Apr 6

BSL2:10 pmBasel EuroAirport Swiss

13h 15m

1 stop

SEA6:25 pmSeattle/Tacoma Intl

May 20

SEA1:35 pmSeattle/Tacoma Intl

12h 40m

1 stop

BSL11:15 amBasel EuroAirport Swiss

$1,248

Fly from

Fly to

Route

Depart

Return

Price

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 2/19

6:05 am-11:04 pm

2 stops25h 59m

Seattle/Tacoma Intl

Mon 3/2

10:08 pm-3:05 pm

2 stops31h 57m

$541

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 2/19

6:05 am-12:24 am

2 stops27h 19m

Seattle/Tacoma Intl

Mon 3/2

1:37 pm-10:20 pm

2 stops47h 43m

$544

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 2/26

6:05 am-4:55 pm

1 stop19h 50m

Seattle/Tacoma Intl

Mon 3/2

7:15 am-6:15 pm

2 stops26h 00m

$548

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 2/19

11:05 am-12:24 am

2 stops22h 19m

Seattle/Tacoma Intl

Mon 3/2

6:50 pm-6:15 pm

1 stop14h 25m

$554

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 2/19

11:05 am-11:04 pm

2 stops20h 59m

Seattle/Tacoma Intl

Mon 3/2

6:50 pm-6:15 pm

1 stop14h 25m

$557

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 2/19

11:05 am-4:55 pm

1 stop14h 50m

Seattle/Tacoma Intl

Mon 3/2

6:50 pm-6:15 pm

1 stop14h 25m

$584

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 2/26

5:55 pm-11:40 am

1 stop26h 45m

Seattle/Tacoma Intl

Mon 3/2

2:10 pm-9:50 am

1 stop34h 40m

$600

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 2/26

6:05 am-11:04 pm

2 stops25h 59m

Seattle/Tacoma Intl

Mon 3/2

7:15 am-6:15 pm

2 stops26h 00m

$602

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Wed 7/1

8:25 am-11:55 am

1 stop12h 30m

Seattle/Tacoma Intl

Sat 8/1

6:50 pm-7:50 pm

1 stop16h 00m

$648

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Wed 7/1

9:50 am-4:59 pm

1 stop16h 09m

Seattle/Tacoma Intl

Sat 8/1

11:59 pm-12:25 pm

2 stops27h 26m

$665

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?

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	13h 00m
Direct flights	None

The fastest flight from Basel to Seattle takes 13h 00m

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 13h 00m.
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

Cle Elum

Tukwila

Lakewood

Federal Way

Centralia

Westport

Kirkland

Fife

Tumwater

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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.

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.