Flights from Basel to Seattle
Compare live flights from Basel to Seattle (BSL–SEA) across multiple airlines, with nonstop options, durations and seasonal price trends below.
Basel to Seattle flights overview
BSL and SEA sit roughly 8,386 km apart, so total travel time depends on whether you fly nonstop or connect. Both full-service and low-cost carriers serve this corridor; BookingTrolley compares their published fares so you can weigh price against flight time and baggage.
Ticket prices from Basel to Seattle change frequently; BookingTrolley aggregates current fares across airlines so you can spot the lowest one. Based on this route's seasonal pattern, fares average roughly $ 779.00 over the year. Nov tends to be the cheapest month to fly (around $ 649.00), while Jun is usually the most expensive at about $ 966.00 — a swing of roughly 49%.
Frequently asked questions about flying from Basel to Seattle
Tuesday and Wednesday are typically the cheapest days on Basel to Seattle for United States travellers, with Friday and Sunday often higher. BookingTrolley compares mid-week and weekend fares on BSL–SEA.
Full-service and low-cost carriers compete from Basel (BSL) to Seattle (SEA). BookingTrolley compares published fares so United States travellers can see which carrier is cheapest.
Economy round-trip flights on Basel to Seattle vary by season. BookingTrolley tracks live fares on BSL–SEA so United States travellers can compare current prices.
Flight time from Basel to Seattle depends on the airline and on whether the itinerary is nonstop or connecting. BookingTrolley shows a duration only when it is calculated from observed departure and arrival times.
Shoulder months often pair good weather with lower airfare into Seattle. BookingTrolley price trends on Basel to Seattle show steeper rises around major United States holiday periods.
Use BookingTrolley's flexible-date comparison for Basel (BSL) to Seattle (SEA) to see which days cost least. Avoiding Friday–Sunday peaks is one of the fastest ways for United States travellers to cut the ticket price.
Find cheap flights on popular routes
Explore fares from Basel, into Seattle, and on related corridors with BookingTrolley.
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