Basel Mulhouse Freiburg (BSL) to Seattle / Tacoma (SEA) flight deal in economy from $752
BSLEuro Airport Basel-Mulhouse-Freiburg
Basel Mulhouse Freiburg, France
SEASeattle–Tacoma International Airport
Seattle / Tacoma, United States
$858 USD
-12%$752 USD
Verified 15 days agoAugust 2026
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Great Availability
65% of dates checked are available within 10% of the lowest price
Thursday, August 6th, 2026
8 round-trip options
Returning
Wed, Aug 12, 2026•6 Day Trip
$932 USD
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Thu, Aug 13, 2026•7 Day Trip
$927 USD
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Fri, Aug 14, 2026•8 Day Trip
$932 USD
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Sat, Aug 15, 2026•9 Day Trip
$932 USD
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Sun, Aug 16, 2026•10 Day Trip
$852 USD
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Mon, Aug 17, 2026•11 Day Trip
$858 USD
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Wed, Aug 19, 2026•13 Day Trip
$858 USD
Returning
Thu, Aug 20, 2026•14 Day Trip
$852 USD