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

British Airways, American Airlines, and Turkish 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 2025/26

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

Prices are currently typical for flights on this route. Typical prices usually range from $568 to $697. The lowest price recently found on this route was $586.

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Find the cheapest flights from Basel to Seattle

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Cheap round-trip flights

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6:05 am - 4:55 pmBSL-SEA

19h 50m1 stop

6:50 pm - 6:15 pmSEA-BSL

14h 25m1 stop

$586British Airways

Find Deal

Thu, Feb 19 - Mon, Mar 2

6:05 am - 4:55 pmBSL-SEA

19h 50m1 stop

6:50 pm - 3:05 pmSEA-BSL

35h 15m1 stop

$588British Airways

Find Deal

Thu, Feb 19 - Mon, Mar 2

11:05 am - 11:32 pmBSL-SEA

21h 27m2 stops

6:50 pm - 3:05 pmSEA-BSL

35h 15m1 stop

$590American Airlines

Find Deal

Thu, Feb 19 - Mon, Mar 2

11:05 am - 11:32 pmBSL-SEA

21h 27m2 stops

6:50 pm - 3:05 pmSEA-BSL

35h 15m1 stop

$592American Airlines

Find Deal

Thu, Feb 19 - Mon, Mar 2

6:05 am - 11:45 amBSL-SEA

14h 40m1 stop

1:40 pm - 1:50 pmSEA-BSL

15h 10m1 stop

$601Delta

Find Deal

Fri, Nov 14 - Tue, Nov 18

6:15 am - 2:19 pmBSL-SEA

41h 04m3 stops

8:00 am - 6:00 pmSEA-BSL

25h 00m3 stops

$1,215Multiple Airlines

Find Deal

Mon, Apr 13 - Sun, Apr 19

7:00 am - 7:18 pmBSL-SEA

21h 18m2 stops

8:00 am - 6:00 pmSEA-BSL

25h 00m3 stops

$1,242Multiple Airlines

Find Deal

Mon, Apr 13 - Sun, Apr 19

7:00 am - 6:25 pmBSL-SEA

20h 25m1 stop

8:00 am - 6:00 pmSEA-BSL

25h 00m3 stops

$1,260Multiple Airlines

Find Deal

Mon, Apr 13 - Sun, Apr 19

11:00 am - 3:40 pmBSL-SEA

13h 40m1 stop

3:10 pm - 6:05 pmSEA-BSL

17h 55m2 stops

$1,363Multiple Airlines

Find Deal

Mon, Apr 13 - Sun, Apr 19

6:00 am - 12:20 pmBSL-SEA

15h 20m1 stop

6:50 pm - 9:15 amSEA-BSL

29h 25m1 stop

$4,180Multiple Airlines

Find Deal

Mon, Apr 13 - Sun, Apr 19

British Airways flights from Basel to Seattle

Our best British Airways deals on Basel to Seattle flight tickets

British Airways

Feb 19

BSL6:05 amBasel EuroAirport Swiss

19h 50m

1 stop

SEA4:55 pmSeattle/Tacoma Intl

Mar 2

SEA6:50 pmSeattle/Tacoma Intl

14h 25m

1 stop

BSL6:15 pmBasel EuroAirport Swiss

$586

Find similar

British Airways

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

$588

Find similar

British Airways

Nov 6

BSL3:40 pmBasel EuroAirport Swiss

28h 50m

1 stop

SEA11:30 amSeattle/Tacoma Intl

Nov 10

SEA6:50 pmSeattle/Tacoma Intl

35h 15m

1 stop

BSL3:05 pmBasel EuroAirport Swiss

$804

Find similar

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

24h 56m

2 stops

SEA10:01 pmSeattle/Tacoma Intl

Mar 2

SEA7:15 amSeattle/Tacoma Intl

26h 00m

2 stops

BSL6:15 pmBasel EuroAirport Swiss

$590

Find similar

American Airlines

Feb 19

BSL11:05 amBasel EuroAirport Swiss

21h 27m

2 stops

SEA11:32 pmSeattle/Tacoma Intl

Mar 2

SEA6:50 pmSeattle/Tacoma Intl

35h 15m

1 stop

BSL3:05 pmBasel EuroAirport Swiss

$592

Find similar

American Airlines

Nov 6

BSL6:05 amBasel EuroAirport Swiss

26h 13m

2 stops

SEA11:18 pmSeattle/Tacoma Intl

Nov 10

SEA10:07 pmSeattle/Tacoma Intl

31h 58m

2 stops

BSL3:05 pmBasel EuroAirport Swiss

$812

Find similar

Fly from

Fly to

Route

Depart

Return

Price

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-6:15 pm

1 stop14h 25m

$586

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

$588

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 2/19

11:05 am-11:32 pm

2 stops21h 27m

Seattle/Tacoma Intl

Mon 3/2

6:50 pm-3:05 pm

1 stop35h 15m

$590

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 2/19

11:05 am-11:32 pm

2 stops21h 27m

Seattle/Tacoma Intl

Mon 3/2

6:50 pm-3:05 pm

1 stop35h 15m

$592

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 11/14

6:05 am-11:45 am

1 stop14h 40m

Seattle/Tacoma Intl

Tue 11/18

1:40 pm-1:50 pm

1 stop15h 10m

$601

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 4/13

6:15 am-2:19 pm

3 stops41h 04m

Seattle/Tacoma Intl

Sun 4/19

8:00 am-6:00 pm

3 stops25h 00m

$1,215

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 4/13

7:00 am-7:18 pm

2 stops21h 18m

Seattle/Tacoma Intl

Sun 4/19

8:00 am-6:00 pm

3 stops25h 00m

$1,242

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 4/13

7:00 am-6:25 pm

1 stop20h 25m

Seattle/Tacoma Intl

Sun 4/19

8:00 am-6:00 pm

3 stops25h 00m

$1,260

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 4/13

11:00 am-3:40 pm

1 stop13h 40m

Seattle/Tacoma Intl

Sun 4/19

3:10 pm-6:05 pm

2 stops17h 55m

$1,363

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 4/13

6:00 am-12:20 pm

1 stop15h 20m

Seattle/Tacoma Intl

Sun 4/19

6:50 pm-9:15 am

1 stop29h 25m

$4,180

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

Direct flights	None

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 30m.
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

Puyallup

Marysville

Redmond

Tukwila

Federal Way

Lakewood

Cle Elum

Fife

Centralia

Kirkland

Shoreline

Westport

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.