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Cheap flights from Basel EuroAirport Swiss to Seattle from $368

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Basel EuroAirport Swiss to Seattle departing on 6/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Basel EuroAirport Swiss to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
6:05 am - 11:04 pm
BSL
-
SEA
25h 59m
2 stops
American Airlines Logo
10:08 pm - 3:05 pm
SEA
-
BSL
31h 57m
2 stops
$541American Airlines
Thu, Feb 19 - Mon, Mar 2
American Airlines Logo
6:05 am - 12:24 am
BSL
-
SEA
27h 19m
2 stops
American Airlines Logo
1:37 pm - 10:20 pm
SEA
-
BSL
47h 43m
2 stops
$544American Airlines
Thu, Feb 19 - Mon, Mar 2
Multiple Airlines Logo
6:05 am - 4:55 pm
BSL
-
SEA
19h 50m
1 stop
Multiple Airlines Logo
7:15 am - 6:15 pm
SEA
-
BSL
26h 00m
2 stops
$548Multiple Airlines
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
11:05 am - 12:24 am
BSL
-
SEA
22h 19m
2 stops
Multiple Airlines Logo
6:50 pm - 6:15 pm
SEA
-
BSL
14h 25m
1 stop
$554Multiple Airlines
Thu, Feb 19 - Mon, Mar 2
Multiple Airlines Logo
11:05 am - 11:04 pm
BSL
-
SEA
20h 59m
2 stops
Multiple Airlines Logo
6:50 pm - 6:15 pm
SEA
-
BSL
14h 25m
1 stop
$557Multiple Airlines
Thu, Feb 19 - Mon, Mar 2
British Airways Logo
11:05 am - 4:55 pm
BSL
-
SEA
14h 50m
1 stop
British Airways Logo
6:50 pm - 6:15 pm
SEA
-
BSL
14h 25m
1 stop
$584British Airways
Thu, Feb 19 - Mon, Mar 2
Air France Logo
5:55 pm - 11:40 am
BSL
-
SEA
26h 45m
1 stop
Air France Logo
2:10 pm - 9:50 am
SEA
-
BSL
34h 40m
1 stop
$600Air France
Thu, Feb 26 - Mon, Mar 2
British Airways Logo
6:05 am - 11:04 pm
BSL
-
SEA
25h 59m
2 stops
British Airways Logo
7:15 am - 6:15 pm
SEA
-
BSL
26h 00m
2 stops
$602British Airways
Thu, Feb 26 - Mon, Mar 2
Lufthansa Logo
8:25 am - 11:55 am
BSL
-
SEA
12h 30m
1 stop
Lufthansa Logo
6:50 pm - 7:50 pm
SEA
-
BSL
16h 00m
1 stop
$648Lufthansa
Wed, Jul 1 - Sat, Aug 1
United Airlines Logo
9:50 am - 4:59 pm
BSL
-
SEA
16h 09m
1 stop
United Airlines Logo
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 EuroAirport Swiss to Seattle

Our best American Airlines deals on Basel EuroAirport Swiss 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 EuroAirport Swiss to Seattle

Our best British Airways deals on Basel EuroAirport Swiss 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

momondo Fare Finder

 
Customize your flight search to find flights from Basel EuroAirport Swiss to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Basel EuroAirport Swiss to Seattle that are best for you.

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
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How to get the cheapest flight ticket from Basel EuroAirport Swiss 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

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

American Airlines is the most popular carrier operating from Basel EuroAirport Swiss to Seattle/Tacoma Intl

When to book flights from Basel EuroAirport Swiss to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Basel EuroAirport Swiss to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Basel EuroAirport Swiss to Seattle (BSL to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Basel EuroAirport Swiss to Seattle

Fastest flight time

13h 00m

Direct flights

None
The fastest flight from Basel EuroAirport Swiss to Seattle takes 13h 00m
There are no direct flights from Basel EuroAirport Swiss to Seattle. There are no popular flight routes from Basel EuroAirport Swiss to Seattle.
Search flight deals

  • How far is Basel EuroAirport Swiss to Seattle/Tacoma Intl by plane?

    The straight-line distance from Basel EuroAirport Swiss to Seattle/Tacoma Intl is 5198.6 mi. 13h 00m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Basel EuroAirport Swiss to Seattle/Tacoma Intl Airport?

    Prices for flights from Basel EuroAirport Swiss to Seattle/Tacoma Intl Airport refresh daily.

  • How old do you have to be to fly from Basel EuroAirport Swiss 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 EuroAirport Swiss to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Marysville
Puyallup
Redmond
Cle Elum
Tukwila
Lakewood
Federal Way
Centralia
Westport
Kirkland
Fife
Tumwater

Why use momondo?

Why should I use momondo to find a flight deal from Basel to Seattle?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Basel.

Can I find flights from Basel to Seattle with flexible booking policies on momondo?

Yes. All flights to Seattle from Basel on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Basel to Seattle?

momondo provides multiple filters to help you find the best flight to Seattle from Basel. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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.

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