BSL - SEA

$447 Find Cheap Flights from Basel to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Basel to Seattle departing on 3/12. 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, 0 bags

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$537
American Airlines
Thu 2/19Mon 3/2
BSL - SEA • 2 stops
Cheapest one-way
$447
Multiple Airlines
Thu 3/12
BSL - SEA • 3 stops
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight 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, Feb 19 - Mon, Mar 2
American Airlines Logo
6:05 am - 9:08 pm
BSL
-
SEA
24h 03m
2 stops
American Airlines Logo
7:15 am - 6:15 pm
SEA
-
BSL
26h 00m
2 stops
$537American Airlines
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
11:05 am - 12:24 am
BSL
-
SEA
22h 19m
2 stops
Multiple Airlines Logo
7:15 am - 6:15 pm
SEA
-
BSL
26h 00m
2 stops
$539Multiple Airlines
Thu, Feb 19 - Mon, Mar 2
American Airlines Logo
6:05 am - 11:04 pm
BSL
-
SEA
25h 59m
2 stops
American Airlines Logo
10:08 pm - 3:05 pm
SEA
-
BSL
31h 57m
2 stops
$541American Airlines
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
6:05 am - 4:55 pm
BSL
-
SEA
19h 50m
1 stop
Multiple Airlines Logo
7:15 am - 6:15 pm
SEA
-
BSL
26h 00m
2 stops
$544Multiple Airlines
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
6:05 am - 4:55 pm
BSL
-
SEA
19h 50m
1 stop
Multiple Airlines Logo
7:15 am - 6:15 pm
SEA
-
BSL
26h 00m
2 stops
$548Multiple Airlines
Thu, Feb 19 - Mon, Mar 2
Multiple Airlines Logo
11:05 am - 12:24 am
BSL
-
SEA
22h 19m
2 stops
Multiple Airlines Logo
6:50 pm - 9:35 pm
SEA
-
BSL
17h 45m
1 stop
$550Multiple Airlines
Thu, Feb 19 - Mon, Mar 2
Multiple Airlines Logo
11:05 am - 12:24 am
BSL
-
SEA
22h 19m
2 stops
Multiple Airlines Logo
6:50 pm - 6:15 pm
SEA
-
BSL
14h 25m
1 stop
$554Multiple Airlines
Thu, Feb 19 - Mon, Mar 2
British Airways Logo
6:05 am - 4:55 pm
BSL
-
SEA
19h 50m
1 stop
British Airways Logo
6:50 pm - 6:15 pm
SEA
-
BSL
14h 25m
1 stop
$581British Airways
Thu, Feb 26 - Mon, Mar 2
American Airlines Logo
11:05 am - 4:55 pm
BSL
-
SEA
14h 50m
1 stop
American Airlines Logo
6:50 pm - 3:05 pm
SEA
-
BSL
35h 15m
1 stop
$583American Airlines
Thu, Feb 19 - Mon, Mar 2
British Airways Logo
11:05 am - 4:55 pm
BSL
-
SEA
14h 50m
1 stop
British Airways Logo
6:50 pm - 6:15 pm
SEA
-
BSL
14h 25m
1 stop
$584British Airways
Booking Insights

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 ($537) and British Airways ($581).

Find deals

Good to know

Low seasonSeptember
Cheapest flight$447
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 24% increase in price.
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 $447 for a one-way ticket and $537 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.

  • 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)