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.

$377 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 $750 to $570. The lowest price recently found on this route was $708.

1 adult

0 bags

Find the cheapest flights from Basel to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:55 am - 11:35 am

BSL

SEA

32h 40m

1 stop

1:30 pm - 10:55 am

SEA

BSL

12h 25m

1 stop

$708British Airways

Sat, Sep 26 - Thu, Oct 8

6:40 am - 11:35 am

BSL

SEA

13h 55m

1 stop

5:15 am - 6:50 pm

SEA

BSL

28h 35m

2 stops

$760American Airlines

Wed, Sep 2 - Sun, Sep 6

11:50 am - 11:35 am

BSL

SEA

32h 45m

1 stop

7:15 am - 6:50 pm

SEA

BSL

26h 35m

2 stops

$762American Airlines

Wed, Sep 2 - Sun, Sep 6

6:30 am - 11:47 am

BSL

SEA

14h 17m

1 stop

9:30 am - 1:55 pm

SEA

BSL

19h 25m

2 stops

$772Delta

Sat, Sep 26 - Thu, Oct 8

10:15 am - 10:05 pm

BSL

SEA

20h 50m

2 stops

9:30 am - 9:45 am

SEA

BSL

15h 15m

2 stops

$777Delta

Sat, Sep 26 - Thu, Oct 8

6:30 am - 11:37 am

BSL

SEA

14h 07m

1 stop

12:05 pm - 1:45 pm

SEA

BSL

16h 40m

2 stops

$781Delta

Fri, Jun 5 - Tue, Jun 9

6:40 am - 11:35 am

BSL

SEA

13h 55m

1 stop

6:00 am - 6:50 pm

SEA

BSL

27h 50m

2 stops

$785American Airlines

Wed, Sep 2 - Sun, Sep 6

12:10 pm - 11:35 am

BSL

SEA

32h 25m

1 stop

1:30 pm - 10:55 am

SEA

BSL

12h 25m

1 stop

$786American Airlines

Mon, Aug 17 - Tue, Aug 25

2:25 pm - 12:10 am

BSL

SEA

18h 45m

2 stops

12:05 pm - 1:45 pm

SEA

BSL

16h 40m

2 stops

$787Delta

Fri, Jun 5 - Tue, Jun 9

9:45 am - 4:59 pm

BSL

SEA

16h 14m

1 stop

6:50 pm - 7:40 pm

SEA

BSL

15h 50m

1 stop

$788Lufthansa

Sun, Aug 16 - Tue, Aug 25

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American Airlines flights from Basel to Seattle

Our best American Airlines deals on Basel to Seattle flight tickets

American Airlines

Sep 2

BSL6:40 amBasel EuroAirport Swiss

13h 55m

1 stop

SEA11:35 amSeattle/Tacoma Intl

Sep 6

SEA5:15 amSeattle/Tacoma Intl

28h 35m

2 stops

BSL6:50 pmBasel EuroAirport Swiss

$760

American Airlines

Sep 2

BSL11:50 amBasel EuroAirport Swiss

32h 45m

1 stop

SEA11:35 amSeattle/Tacoma Intl

Sep 6

SEA7:15 amSeattle/Tacoma Intl

26h 35m

2 stops

BSL6:50 pmBasel EuroAirport Swiss

$762

American Airlines

Sep 2

BSL6:40 amBasel EuroAirport Swiss

13h 55m

1 stop

SEA11:35 amSeattle/Tacoma Intl

Sep 6

SEA6:00 amSeattle/Tacoma Intl

27h 50m

2 stops

BSL6:50 pmBasel EuroAirport Swiss

$785

Lufthansa flights from Basel to Seattle

Our best Lufthansa deals on Basel to Seattle flight tickets

Lufthansa

Aug 16

BSL9:45 amBasel EuroAirport Swiss

16h 14m

1 stop

SEA4:59 pmSeattle/Tacoma Intl

Aug 25

SEA6:50 pmSeattle/Tacoma Intl

15h 50m

1 stop

BSL7:40 pmBasel EuroAirport Swiss

$788

Lufthansa

Aug 17

BSL2:30 pmBasel EuroAirport Swiss

30h 25m

1 stop

SEA11:55 amSeattle/Tacoma Intl

Aug 26

SEA6:50 pmSeattle/Tacoma Intl

15h 50m

1 stop

BSL7:40 pmBasel EuroAirport Swiss

$820

Lufthansa

Jul 28

BSL1:00 pmBasel EuroAirport Swiss

12h 59m

1 stop

SEA4:59 pmSeattle/Tacoma Intl

Aug 2

SEA6:50 pmSeattle/Tacoma Intl

15h 50m

1 stop

BSL7:40 pmBasel EuroAirport Swiss

$841

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 9/26

11:55 am-11:35 am

1 stop32h 40m

Seattle/Tacoma Intl

Thu 10/8

1:30 pm-10:55 am

1 stop12h 25m

$708

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Wed 9/2

6:40 am-11:35 am

1 stop13h 55m

Seattle/Tacoma Intl

Sun 9/6

5:15 am-6:50 pm

2 stops28h 35m

$760

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Wed 9/2

11:50 am-11:35 am

1 stop32h 45m

Seattle/Tacoma Intl

Sun 9/6

7:15 am-6:50 pm

2 stops26h 35m

$762

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 9/26

6:30 am-11:47 am

1 stop14h 17m

Seattle/Tacoma Intl

Thu 10/8

9:30 am-1:55 pm

2 stops19h 25m

$772

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 9/26

10:15 am-10:05 pm

2 stops20h 50m

Seattle/Tacoma Intl

Thu 10/8

9:30 am-9:45 am

2 stops15h 15m

$777

Quickest round-trip

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 6/5

6:30 am-11:37 am

1 stop14h 07m

Seattle/Tacoma Intl

Tue 6/9

12:05 pm-1:45 pm

2 stops16h 40m

$781

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Wed 9/2

6:40 am-11:35 am

1 stop13h 55m

Seattle/Tacoma Intl

Sun 9/6

6:00 am-6:50 pm

2 stops27h 50m

$785

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 8/17

12:10 pm-11:35 am

1 stop32h 25m

Seattle/Tacoma Intl

Tue 8/25

1:30 pm-10:55 am

1 stop12h 25m

$786

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 6/5

2:25 pm-12:10 am

2 stops18h 45m

Seattle/Tacoma Intl

Tue 6/9

12:05 pm-1:45 pm

2 stops16h 40m

$787

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sun 8/16

9:45 am-4:59 pm

1 stop16h 14m

Seattle/Tacoma Intl

Tue 8/25

6:50 pm-7:40 pm

1 stop15h 50m

$788

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 month to fly to Seattle?

In general, October 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 $521. If you don’t want to visit Seattle in October, then you should wait until September to fly from Basel, when ticket prices are also cheap, with an average price of $527.

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	16h 09m
Direct flights	None

The fastest flight from Basel to Seattle takes 16h 09m

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

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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 16h 09m.
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

Redmond

Kent

Marysville

Puyallup

Tukwila

Lakewood

Cle Elum

Federal Way

Centralia

Fife

Shoreline

Westport

Tumwater

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.