Question 1

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

Accepted Answer

In the last 3 days, the lowest price for a flight from Basel EuroAirport Swiss to Seattle was $441 for a one-way ticket and $754 for a round-trip. <a href='/flight-routes/Basel-EuroAirport-Swiss-BSL/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 2

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

Accepted Answer

Yes, you'll most likely have to show a valid passport before boarding the plane in Basel and on arrival in Seattle. <a href='/flight-routes/Basel-EuroAirport-Swiss-BSL/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 3

Which aircraft models fly most regularly from Basel to Seattle?

Accepted Answer

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

Question 4

What is the cheapest month to fly from Basel EuroAirport Swiss to Seattle?

Accepted Answer

The cheapest month for flights from Basel EuroAirport Swiss to Seattle is March, where tickets cost $0 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $861 and $829 respectively.

Question 5

What is the cheapest month to fly from Basel EuroAirport Swiss to Seattle?

Accepted Answer

The cheapest month for flights from Basel EuroAirport Swiss to Seattle is March, where tickets cost $0 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $861 and $829 respectively.

Question 6

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

Accepted Answer

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. <a href='/flight-routes/Basel-EuroAirport-Swiss-BSL/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 7

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

Accepted Answer

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. <a href='/flight-routes/Basel-EuroAirport-Swiss-BSL/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 8

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

Accepted Answer

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. <a href='/flight-routes/Basel-EuroAirport-Swiss-BSL/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 9

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

Accepted Answer

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. <a href='/flight-routes/Basel-EuroAirport-Swiss-BSL/Seattle-Tacoma-Intl-SEA'>Visit our flight page for the latest deals!>/a>

Question 10

Which airlines provide the cheapest flights from Basel to Seattle?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Basel to Seattle were found on American Airlines ($754) and United Airlines ($794).

Question 11

Which airlines provide the cheapest flights from Basel to Seattle?

Accepted Answer

In the past 3 days, the cheapest round-trip tickets from Basel to Seattle were found on American Airlines ($754) and United Airlines ($794).

Question 12

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

Accepted Answer

Flight prices are below average for this route right now.Flights to Seattle from Basel EuroAirport Swiss usually cost between $759 and $595 in September.
The lowest price found in the past 3 days was $754 on American Airlines (Sep 2-Sep 6).

BSL - SEA

$441 Find Cheap Flights from Basel to Seattle

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Everything you should know

Cheap Flights from Basel to Seattle (BSL-SEA)

Recent round-trip flight deals from Basel to Seattle

Recent one-way flight deals from Basel to Seattle

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.

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

What is the cheapest month to fly from Basel EuroAirport Swiss to Seattle?

The cheapest month for flights from Basel EuroAirport Swiss to Seattle is March, where tickets cost $0 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $861 and $829 respectively.

Which airlines provide the cheapest flights from Basel to Seattle?

In the past 3 days, the cheapest round-trip tickets from Basel to Seattle were found on American Airlines ($754) and United Airlines ($794).

Good to know

When to book flights from Basel to Seattle

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 $441 for a one-way ticket and $754 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

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Cabin class types available on flights to Seattle

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

Find direct flights to and from Basel and Seattle

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Flights from domestic origins to Seattle

Choose which airport to fly into in Basel

Find deals for your return flight

Low season	September
High season	July
Cheapest flight	$441