Seattle (SEA) → Basel (BSL)
About Seattle to Basel Flights
Discover the best flights from Seattle to Basel, covering 8,386 km in approximately 10h 59m. Seattle (SEA) to Basel (BSL) is one of the major long-haul routes connecting United States and Switzerland. With 7 major airlines operating this route, travelers have plenty of options to choose from. Whether you're traveling for business or leisure, our comprehensive guide helps you find the best deals, understand seasonal price variations, and choose the right airline for your journey from Seattle to Basel.
12-Month Price History
Flight prices from Seattle to Basel vary significantly throughout the year. February typically offers the best deals with average prices around $1554, while July sees the highest prices, averaging $2566. Savvy travelers can save up to 39% by choosing their travel dates wisely.
Best Time to Fly
Cheapest Month
February
Save up to 40% on average
Most Expensive
July
Peak season pricing
Book in Advance
75 days
For best prices
Booking Tips
For the best prices on Seattle to Basel flights, we recommend booking 162 days in advance. International flights typically see price increases as the departure date approaches, so early booking is advisable. Tuesday and Wednesday departures often offer the lowest fares, while Friday and Sunday flights tend to be more expensive due to business and leisure travel demand. Consider flying early morning or late evening for additional savings, as these off-peak times usually have lower demand.
Airlines Serving This Route
Airline | Economy | Business | First |
---|---|---|---|
United Airlines UA | $1920 | $8170 | $11590 |
Alaska Airlines AS | $2040 | $7130 | $11190 |
American Airlines AA | $2050 | $7530 | $12340 |
Delta Air Lines DL | $2080 | $8680 | $12810 |
British Airways BA | $2140 | $8530 | $14130 |
Air France AF | $2350 | $7930 | $13380 |
Lufthansa LH | $2510 | $8690 | $12180 |
United Airlines
UA
Economy
$1920
Business
$8170
First
$11590
Alaska Airlines
AS
Economy
$2040
Business
$7130
First
$11190
American Airlines
AA
Economy
$2050
Business
$7530
First
$12340
Delta Air Lines
DL
Economy
$2080
Business
$8680
First
$12810
British Airways
BA
Economy
$2140
Business
$8530
First
$14130
Air France
AF
Economy
$2350
Business
$7930
First
$13380
Lufthansa
LH
Economy
$2510
Business
$8690
First
$12180
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
Seattle → Zurich
Seattle-Tacoma International (SEA) to Zürich (ZRH)
Distance: 8,439 km
Average price: $1776
Seattle → Stuttgart
Seattle-Tacoma International (SEA) to Stuttgart (STR)
Distance: 8,349 km
Average price: $1758
Seattle → Geneva
Seattle-Tacoma International (SEA) to Geneva (GVA)
Distance: 8,454 km
Average price: $1779
Seattle → Stuttgart
Seattle-Tacoma International (SEA) to Stuttgart (STR)
Distance: 8,349 km
Average price: $1758
Don't Forget Travel Insurance!
Found your flight? Protect your trip with SafetyWing's comprehensive travel insurance. Perfect for trips to Basel, Switzerland.
- Medical coverage up to $250,000
- Trip interruption & delays covered
- Lost luggage protection included
From just $45/month • Works in 180+ countries • COVID-19 coverage included
Trusted by 100,000+ travelers
Frequently Asked Questions
How long is the flight from Seattle to Basel?
The flight time from Seattle (SEA) to Basel (BSL) is approximately 10 hours and 59 minutes. This duration is for direct flights and may vary depending on aircraft type, weather conditions, and air traffic.
What is the distance between Seattle and Basel?
The aerial distance between Seattle and Basel is 8,386 kilometers (5,211 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Seattle to Basel?
Several airlines operate flights between Seattle and Basel, including Delta Air Lines, Alaska Airlines, American Airlines and 4 more airlines. Most flights on this route include one or more stops.
What is the cheapest month to fly from Seattle to Basel?
Based on historical data, February typically offers the lowest airfares for flights from Seattle to Basel. However, prices can vary based on holidays, events, and airline promotions. We recommend checking our price calendar for the most up-to-date information.
How far in advance should I book my flight to Basel?
For the best prices on Seattle to Basel flights, we recommend booking 116 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from Seattle to Basel?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of United States traveling to Switzerland should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between Seattle and Basel?
Seattle operates on America/Los_Angeles time zone, while Basel is in the Europe/Zurich time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.