Basel (BSL) → Seattle (SEA)
About Basel to Seattle Flights
Discover the best flights from Basel to Seattle, covering 8,386 km in approximately 10h 59m. Basel (BSL) to Seattle (SEA) is one of the major long-haul routes connecting Switzerland and United States. 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 Basel to Seattle.
12-Month Price History
Flight prices from Basel to Seattle vary significantly throughout the year. February typically offers the best deals with average prices around $1562, while July sees the highest prices, averaging $2625. Savvy travelers can save up to 40% 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
88 days
For best prices
Booking Tips
For the best prices on Basel to Seattle flights, we recommend booking 106 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 |
|---|---|---|---|
British Airways BA | $1570 | $5520 | $9010 |
Lufthansa LH | $1610 | $6430 | $10750 |
United Airlines UA | $1610 | $6440 | $7660 |
American Airlines AA | $1610 | $5920 | $9340 |
Alaska Airlines AS | $1610 | $5490 | $8980 |
Air France AF | $1640 | $6500 | $9700 |
Delta Air Lines DL | $1690 | $6360 | $9600 |
British Airways
BA
Economy
$1570
Business
$5520
First
$9010
Lufthansa
LH
Economy
$1610
Business
$6430
First
$10750
United Airlines
UA
Economy
$1610
Business
$6440
First
$7660
American Airlines
AA
Economy
$1610
Business
$5920
First
$9340
Alaska Airlines
AS
Economy
$1610
Business
$5490
First
$8980
Air France
AF
Economy
$1640
Business
$6500
First
$9700
Delta Air Lines
DL
Economy
$1690
Business
$6360
First
$9600
Prices shown are estimates based on historical data. Actual prices may vary based on dates, availability, and current promotions.
Alternative Flight Options
Zurich → Seattle
Zürich (ZRH) to Seattle-Tacoma International (SEA)
Distance: 8,439 km
Average price: $1776
Stuttgart → Seattle
Stuttgart (STR) to Seattle-Tacoma International (SEA)
Distance: 8,349 km
Average price: $1758
Geneva → Seattle
Geneva (GVA) to Seattle-Tacoma International (SEA)
Distance: 8,454 km
Average price: $1779
Stuttgart → Seattle
Stuttgart (STR) to Seattle-Tacoma International (SEA)
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 Seattle, United States.
- 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 Basel to Seattle?
The flight time from Basel (BSL) to Seattle (SEA) 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 Basel and Seattle?
The aerial distance between Basel and Seattle is 8,386 kilometers (5,211 miles). This is the straight-line distance, which is used to calculate flight times.
Which airlines fly from Basel to Seattle?
Several airlines operate flights between Basel and Seattle, 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 Basel to Seattle?
Based on historical data, February typically offers the lowest airfares for flights from Basel to Seattle. 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 Seattle?
For the best prices on Basel to Seattle flights, we recommend booking 107 days in advance. International flights generally require earlier booking than domestic routes.
Do I need a visa to travel from Basel to Seattle?
Visa requirements depend on your nationality and the purpose of your visit. Citizens of Switzerland traveling to United States should check the latest visa requirements. Visit our partner site visarequirements.io for detailed visa information.
What is the time difference between Basel and Seattle?
Basel operates on Europe/Zurich time zone, while Seattle is in the America/Los_Angeles time zone. For current time differences and to plan your schedule, visit our partner site timezig.com for accurate timezone conversions.