BSL - SEA

$438 Find Cheap Flights from Basel to Seattle - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$749
Typical prices: $747-$917
Lufthansa
Mon 11/5Sun 11/11
BSL - SEA • 1 stop
Cheapest one-way
$438
Typical prices: $559-$1,073
British Airways
Sat 3/31
BSL - SEA • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Basel EuroAirport Swiss and Seattle. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
February
Cheapest • 22% price drop
August
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Frankfurt am Main (FRA)
Cheapest • Avg $770 (round-trip)
Amsterdam Schiphol (AMS)
Shortest trip • 14h 31m (one-way)
Insights
Insights
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Flight Deals

Cheap Flights from Basel to Seattle (BSL-SEA)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Basel to Seattle

Thu, Jan 14 - Wed, Jan 20
Multiple Airlines Logo
11:05 am - 4:50 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
14h 45m1 stop London Heathrow
Multiple Airlines Logo
6:45 pm - 7:50 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
16h 05m1 stop London Heathrow
$688Multiple Airlines
Thu, Nov 12 - Tue, Nov 17
British Airways Logo
11:05 am - 4:50 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
14h 45m1 stop London Heathrow
British Airways Logo
6:45 pm - 8:00 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
16h 15m1 stop London Heathrow
$730British Airways
Thu, Jan 14 - Wed, Jan 20
British Airways Logo
11:05 am - 4:50 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
14h 45m1 stop London Heathrow
British Airways Logo
10:17 am - 2:55 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
19h 38m2 stops Chicago O'Hare Intl London Heathrow
$732British Airways
Thu, Nov 12 - Tue, Nov 17
British Airways Logo
11:05 am - 4:50 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
14h 45m1 stop London Heathrow
British Airways Logo
2:07 pm - 8:00 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
20h 53m2 stops Dallas/Fort Worth London Heathrow
$734British Airways
Thu, Jan 14 - Wed, Jan 20
British Airways Logo
11:05 am - 12:43 amBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
22h 38m2 stops London Heathrow Chicago O'Hare Intl
British Airways Logo
10:17 am - 2:55 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
19h 38m2 stops Chicago O'Hare Intl London Heathrow
$736British Airways
Thu, Nov 5 - Wed, Nov 11
Lufthansa Logo
6:45 am - 12:00 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
14h 15m1 stop Frankfurt am Main
Lufthansa Logo
2:50 pm - 4:05 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
16h 15m1 stop Munich Franz Josef Strauss
$749Lufthansa
Thu, Nov 12 - Tue, Nov 17
Multiple Airlines Logo
6:45 am - 6:22 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
20h 37m2 stops Frankfurt am Main Vancouver Intl
Multiple Airlines Logo
10:10 am - 12:20 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
17h 10m2 stops Vancouver Intl Munich Franz Josef Strauss
$751Multiple Airlines
Thu, Nov 12 - Thu, Nov 19
Multiple Airlines Logo
6:45 am - 9:57 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
24h 12m2 stops Frankfurt am Main Vancouver Intl
Multiple Airlines Logo
8:40 am - 12:20 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
18h 40m2 stops Vancouver Intl Munich Franz Josef Strauss
$751Multiple Airlines
Thu, Nov 12 - Thu, Nov 19
British Airways Logo
3:45 pm - 4:50 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
34h 05m1 stop London Heathrow
British Airways Logo
1:40 pm - 3:05 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
16h 25m1 stop London Heathrow
$754British Airways
Thu, Nov 5 - Wed, Nov 11
Multiple Airlines Logo
9:40 am - 9:57 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
21h 17m2 stops Munich Franz Josef Strauss Vancouver Intl
Multiple Airlines Logo
7:05 pm - 2:00 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
33h 55m2 stops Vancouver Intl Frankfurt am Main
$754Multiple Airlines
Booking Insights

Price, demand and travel trends for Basel EuroAirport Swiss to Seattle flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Basel EuroAirport Swiss to Seattle?

Round-trip flights from Basel EuroAirport Swiss to Seattle typically range from $747 to $917. The lowest price found in the past 5 days was $749, on Lufthansa.

What's the cheapest day of the week to fly from Basel EuroAirport Swiss to Seattle?

Based on deals KAYAK users found in the last 12 months, Monday is the cheapest day of the week to fly from Basel EuroAirport Swiss to Seattle. It’s 11% cheaper than the average day, while Friday is the most expensive, with prices 9% higher.

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Key details for Basel EuroAirport Swiss to Seattle flights

Low season

February

Cheapest flight

$438
Beat the crowds with an average 86% drop in travelers.
The most popular month to fly with an average 95% increase in travelers.
One-way flight from Basel EuroAirport Swiss to Seattle

When to book flights from Basel to Seattle

Are your dates flexible? Find out the best times to travel from Basel to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Basel EuroAirport Swiss to Seattle flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Basel EuroAirport Swiss to Seattle?

    Only Economy Class is available on flights from Basel EuroAirport Swiss to Seattle.

  • How long is a flight from Basel EuroAirport Swiss to Seattle?

    A nonstop flight from Basel EuroAirport Swiss to Seattle takes 00m, covering 5,207 miles.

  • Do I need a passport to fly from Basel EuroAirport Swiss to Seattle?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Basel EuroAirport Swiss to Seattle flight?

    Round-trip flights from Basel EuroAirport Swiss to Seattle range from $747 to $917, with an average of $846 over the past 12 months. Anything below $747 counts as a good deal.

  • How are flight prices from Basel EuroAirport Swiss to Seattle looking right now?

    One-way fares from Basel EuroAirport Swiss to Seattle are currently lower than usual. Average one-way flight prices are about $474, which is 41% below the typical average for this route.

  • What car rental options are available at Seattle/Tacoma Intl Airport (SEA)?

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:

    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Hertz

  • Which airports can I use when flying from Basel EuroAirport Swiss to Seattle?

    Flights from Basel EuroAirport Swiss to Seattle usually depart from Basel EuroAirport Swiss (BSL) and arrive at Seattle/Tacoma Intl (SEA).

  • Which airports do connecting flights from Basel EuroAirport Swiss to Seattle pass through?

    One-stop flights from Basel EuroAirport Swiss to Seattle most commonly connect through:

    • London Heathrow (LHR) - 42% of one-stop connections
    • Frankfurt am Main (FRA) - 26% of one-stop connections
    • Amsterdam Schiphol (AMS) - 17% of one-stop connections
    • Munich Franz Josef Strauss (MUC) - 15% of one-stop connections

  • Can I save money by using flexible dates for flights from Basel EuroAirport Swiss to Seattle?

    Yes. Flexible dates can save you up to 19% on flights from Basel EuroAirport Swiss to Seattle. Monday is the cheapest departure day at $757 round-trip on average, while Friday is the most expensive at $928, a difference of $171.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Basel EuroAirport Swiss to Seattle?

    Flying via Frankfurt am Main (FRA) gives the shortest average 1-stop total travel time at 14h 27m, compared with 14h 31m via Amsterdam Schiphol (AMS) and 14h 33m via London Heathrow (LHR).

  • What is the time difference between Basel EuroAirport Swiss and Seattle?

    Seattle is 8 hours behind Basel EuroAirport Swiss (Pacific Time vs Central European Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Pike Place Market, Lumen Field and Space Needle. These are among the most viewed places in Seattle on KAYAK.

Your guide to booking Basel EuroAirport Swiss to Seattle flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Monday departure and avoid flying on Friday. On this route, Monday flights average $757, about $171 less than Friday fares (18% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Basel EuroAirport Swiss to Seattle trip for February. Fares historically average $661 round-trip in that month - typically $352 less than the most expensive month, which is November (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.

    • Coast Gateway Hotel
    • Seattle Airport Marriott
    • Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport

More options for your flight from Basel to Seattle

Complete your trip to Seattle with a hotel stay or car rental

Car rentals in Seattle
Hotels in Seattle
Vacations in Seattle