Seattle to Basel, Switzerland for only $437 roundtrip

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Cheap flights from Seattle to Basel, Switzerland for only $437 roundtrip with British Airways.

DEPART:
Seattle, USA

ARRIVE:
Basel, Switzerland

RETURN:
Seattle, USA

DATES:
Availability from December 2025 to March 2026 (excluding Christmas/New Year)

Example dates:
3rd-10th Feb
4th-11th Feb
10th-17th Feb
11th-18th Feb
17th-24th Feb
24th Feb – 3rd Mar
25th Feb – 4th Mar
3rd-10th Mar
–
More dates are available between $438 and $439 roundtrip:
1st-8th Dec
2nd-9th Dec
2nd-9th Feb
16th-23rd Feb
18th-25th Feb
23rd Feb – 2nd Mar

and more…

STOPS:
London

AIRLINES:
British Airways