Seattle / Tacoma (SEA) to Basel Mulhouse Freiburg (BSL) flight deal in economy from $728
SEASeattle–Tacoma International Airport
Seattle / Tacoma, United States
BSLEuro Airport Basel-Mulhouse-Freiburg
Basel Mulhouse Freiburg, France
$975 USD
-25%$728 USD
Verified 13 days agoSeptember 2026
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Fair Availability
36% of dates checked are available within 10% of the lowest price
Saturday, September 19th, 2026
10 round-trip options
Returning
Thu, Sep 24, 2026•5 Day Trip
$1,818 USD
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Fri, Sep 25, 2026•6 Day Trip
$1,492 USD
Returning
Sat, Sep 26, 2026•7 Day Trip
$919 USD
Returning
Sun, Sep 27, 2026•8 Day Trip
$912 USD
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Mon, Sep 28, 2026•9 Day Trip
$1,003 USD
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Tue, Sep 29, 2026•10 Day Trip
$943 USD
Returning
Wed, Sep 30, 2026•11 Day Trip
$943 USD
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Thu, Oct 1, 2026•12 Day Trip
$943 USD
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Fri, Oct 2, 2026•13 Day Trip
$852 USD
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Sat, Oct 3, 2026•14 Day Trip
$919 USD