Basel Mulhouse Freiburg (BSL) to Seattle / Tacoma (SEA) flight deal from $537 USD in economy class – flightdeals.net

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Air France

Delta Air Lines

DLDelta Air Lines

KLM

Round Trip•Economy

Euro Airport Basel-Mulhouse-Freiburg

Basel Mulhouse Freiburg, France

Seattle–Tacoma International Airport

Seattle / Tacoma, United States

$870 USD

-38%$537 USD

Verified Dec 1, 2025 at 4:04 AM

March 2026

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23 24 25 26 27 28 1$537 2$537 3$537 4$537 5$537 6$537 7$542 8$537 9$537 10 11 12 13 14 15 16$548 17 18 19 20 21 22 23 24 25 26$585 27 28 29 30 31 1 2 3 4 5

Good Availability

49% of dates checked are available within 10% of the lowest price

Thursday, March 26th, 2026

2 round-trip options

Returning

Sun, Apr 5, 2026•10 Day Trip

$585 USD

Returning

Mon, Apr 6, 2026•11 Day Trip

$585 USD