BSL - SEA

$531 Find Cheap Flights from Basel to Seattle

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Basel to Seattle departing on 9/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Basel to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Basel to Seattle, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Basel to Seattle (BSL-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Basel to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Basel to Seattle

Thu, Sep 4 - Thu, Sep 11
American Airlines Logo
6:10 am - 11:35 amBSL-SEA
14h 25m1 stop
American Airlines Logo
1:30 pm - 10:50 pmSEA-BSL
24h 20m1 stop
$531American Airlines
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Thu, Oct 2 - Sat, Oct 18
British Airways Logo
6:10 am - 11:35 amBSL-SEA
14h 25m1 stop
British Airways Logo
8:20 pm - 6:25 pmSEA-BSL
13h 05m1 stop
$533British Airways
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Fri, Aug 29 - Fri, Sep 5
Delta Logo
10:15 am - 3:55 pmBSL-SEA
14h 40m1 stop
Delta Logo
7:10 am - 9:35 amSEA-BSL
17h 25m2 stops
$573Delta
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Sat, Aug 23 - Wed, Sep 24
Delta Logo
6:15 am - 6:46 pmBSL-SEA
21h 31m2 stops
Delta Logo
7:20 am - 9:30 amSEA-BSL
17h 10m2 stops
$579Delta
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Fri, Jul 18 - Wed, Jul 23
Lufthansa Logo
6:05 am - 11:55 amBSL-SEA
14h 50m1 stop
Lufthansa Logo
6:50 pm - 7:35 pmSEA-BSL
15h 45m1 stop
$617Lufthansa
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Fri, Jul 18 - Mon, Sep 8
Lufthansa Logo
6:05 am - 11:55 amBSL-SEA
14h 50m1 stop
Lufthansa Logo
10:00 am - 1:40 pmSEA-BSL
18h 40m2 stops
$622Lufthansa
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Fri, Jul 18 - Wed, Jul 23
Logo
1:00 pm - 10:16 pmBSL-SEA
18h 16m2 stops
Logo
2:55 pm - 7:35 pmSEA-BSL
19h 40m2 stops
$674
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Tue, Jul 22 - Tue, Sep 9
United Airlines Logo
11:25 am - 12:59 amBSL-SEA
22h 34m3 stops
United Airlines Logo
8:00 am - 10:50 amSEA-BSL
17h 50m2 stops
$681United Airlines
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Mon, Jul 21 - Sat, Sep 6
United Airlines Logo
9:45 am - 3:53 pmBSL-SEA
39h 08m2 stops
United Airlines Logo
11:54 pm - 12:25 pmSEA-BSL
27h 31m2 stops
$683United Airlines
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Mon, Oct 27 - Mon, Nov 3
Logo
10:40 am - 11:27 pmBSL-SEA
20h 47m2 stops
Logo
5:20 pm - 6:20 pmSEA-BSL
16h 00m1 stop
$1,013
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KAYAK's insights & trends for Basel to Seattle flights

Get data-powered insights and trends into flights from Basel to Seattle to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Basel to Seattle?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Basel to Seattle were found on American Airlines ($531) and British Airways ($533).

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Good to know

Low seasonNovember
High seasonNovember
Cheapest flight$531
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly and prices are also 24% lower on average.
Flight from Basel 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
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Basel to Seattle flights

  • What is the cheapest flight from Basel EuroAirport Swiss to Seattle?

    In the last 3 days, the lowest price for a flight from Basel EuroAirport Swiss to Seattle was $700 for a one-way ticket and $531 for a round-trip.

  • Do I need a passport to fly between Basel and Seattle?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Basel and on arrival in Seattle.

  • Which aircraft models fly most regularly from Basel to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Basel to Seattle?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Basel and Seattle, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Basel to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Basel to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Basel to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Basel is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Basel to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Basel with another airline. Booking your flights between Basel and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Basel to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Basel up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from Basel to Seattle

Information on your arrival and departure airports

Basel (BSL)
Seattle (SEA)

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