BSL - SEA

$415 Find Cheap Flights from Basel to Seattle - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$675
Typical prices: $632-$852
Multiple Airlines
Mon 10/8Sat 10/13
BSL - SEA • 2 stops
Cheapest one-way
$415
Typical prices: $558-$830
Multiple Airlines
Thu 1/18
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
October
Cheapest • 17% price drop
August
Most popular
Good to know
+1
Good to know
+1
Top layover airports
London Heathrow (LHR)
Cheapest • Avg $736 (round-trip)
Munich Franz Josef Strauss (MUC)
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, Oct 8 - Tue, Oct 13
Multiple Airlines Logo
7:00 am - 8:40 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
22h 40m2 stops London Gatwick Reykjavik Keflavik Intl
Multiple Airlines Logo
7:00 pm - 8:40 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
16h 40m2 stops Reykjavik Keflavik Intl London Gatwick
$675Multiple Airlines
Tue, Dec 1 - Sun, Dec 6
British Airways Logo
10:50 am - 4:50 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
15h 00m1 stop London Heathrow
British Airways Logo
6:45 pm - 7:25 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
15h 40m1 stop London Heathrow
$701British Airways
Thu, Oct 8 - Tue, Oct 13
British Airways Logo
6:10 am - 11:35 amBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
14h 25m1 stop London Heathrow
British Airways Logo
8:20 pm - 10:50 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
17h 30m1 stop London Heathrow
$707British Airways
Tue, Dec 1 - Sun, Dec 6
British Airways Logo
7:30 pm - 4:54 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
30h 24m2 stops London Heathrow Dallas/Fort Worth
British Airways Logo
6:45 pm - 7:25 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
15h 40m1 stop London Heathrow
$710British Airways
Fri, Dec 18 - Sat, Jan 2
British Airways Logo
8:35 pm - 11:25 amBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
23h 50m1 stop London Heathrow
British Airways Logo
6:45 pm - 8:10 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
16h 25m1 stop London Heathrow
$716British Airways
Thu, Jan 14 - Sun, Jan 17
British Airways Logo
8:40 pm - 4:50 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
29h 10m1 stop London Heathrow
British Airways Logo
6:45 pm - 10:00 amSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
30h 15m1 stop London Heathrow
$741British Airways
Thu, Oct 8 - Mon, Oct 12
British Airways Logo
6:10 am - 11:35 amBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
14h 25m1 stop London Heathrow
British Airways Logo
8:20 pm - 10:55 amSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
29h 35m1 stop London Heathrow
$742British Airways
Thu, Jan 14 - Sun, Jan 17
American Airlines Logo
11:05 am - 9:35 amBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
31h 30m2 stops London Heathrow Chicago O'Hare Intl
American Airlines Logo
11:28 pm - 3:20 pmSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
30h 52m2 stops Chicago O'Hare Intl London Heathrow
$746American Airlines
Thu, Oct 8 - Mon, Oct 12
Multiple Airlines Logo
6:10 am - 11:35 amBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
14h 25m1 stop London Heathrow
Multiple Airlines Logo
7:30 am - 11:00 amSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
18h 30m2 stops Dallas/Fort Worth London Heathrow
$747Multiple Airlines
Thu, Oct 8 - Mon, Oct 12
Delta Logo
6:30 am - 7:05 pmBSL  Basel EuroAirport Swiss-SEA Seattle/Tacoma Intl
21h 35m2 stops Amsterdam Schiphol Boston Logan Intl
Delta Logo
8:25 am - 9:55 amSEA  Seattle/Tacoma Intl-BSL Basel EuroAirport Swiss
16h 30m2 stops Minneapolis St Paul Paris Charles de Gaulle
$770Delta
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 from Basel EuroAirport Swiss to Seattle with more confidence.

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

Friday is the cheapest day of the week to fly from Basel EuroAirport Swiss to Seattle, it is 22% cheaper than the average day. Wednesday is the most expensive day with flight prices 13% higher than average. Based on deals found by KAYAK users in the last 12 months.

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Key details for Basel EuroAirport Swiss to Seattle flights

Low season

February

Cheapest flight

$415
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 2% increase in price.
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 route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • 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).

  • 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.

  • 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:

    • Frankfurt am Main (FRA) - 49% of one-stop connections
    • London Heathrow (LHR) - 28% of one-stop connections
    • Amsterdam Schiphol (AMS) - 13% of one-stop connections
    • Munich Franz Josef Strauss (MUC) - 10% of one-stop connections

    Frankfurt am Main (FRA) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 31% on the Basel EuroAirport Swiss to Seattle route. Friday is the cheapest departure day at $596 round-trip on average, while Wednesday is the most expensive at $861, a difference of $265. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Pike Place Market, Pier 66 and Lumen Field. These are among the most viewed places in Seattle on KAYAK.

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

    A nonstop flight from Basel EuroAirport Swiss to Seattle takes 0h 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 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 $450, which is 43% below the typical average for this route.

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

    Flying via Munich Franz Josef Strauss (MUC) gives the shortest average 1-stop total travel time at 14h 31m, compared with 14h 34m via London Heathrow (LHR) and 14h 42m via Frankfurt am Main (FRA).

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

    Seattle is 9 hours behind Basel EuroAirport Swiss (Pacific Time vs Central European Time). Plan for the time shift when scheduling connections or first-day activities.

  • 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
    · Dollar

  • 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 $632 to $852, with an average of $761 over the past 12 months. Anything below $632 counts as a good deal.

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 can be flexible, aim for a Friday departure instead of Wednesday. On this route, Friday flights average $596 - about $265 less than Wednesday (31% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Basel EuroAirport Swiss to Seattle trip for October. Fares historically average $633 round-trip in that month - typically $273 less than the most expensive month, which is December (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.
    - Seattle Airport Marriott
    - Coast Gateway Hotel
    - 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
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