Basel Mulhouse Freiburg (BSL) to Seattle / Tacoma (SEA) flight deal in economy from $760

Sunday, August 9th, 2026

10 round-trip options

Returning
Fri, Aug 14, 20265 Day Trip
$1,351 USD
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Sat, Aug 15, 20266 Day Trip
$949 USD
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Sun, Aug 16, 20267 Day Trip
$873 USD
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Mon, Aug 17, 20268 Day Trip
$867 USD
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Tue, Aug 18, 20269 Day Trip
$917 USD
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Wed, Aug 19, 202610 Day Trip
$1,369 USD
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Thu, Aug 20, 202611 Day Trip
$1,179 USD
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Fri, Aug 21, 202612 Day Trip
$1,450 USD
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Sat, Aug 22, 202613 Day Trip
$1,558 USD
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Sun, Aug 23, 202614 Day Trip
$1,139 USD