Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Basel from $401

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Basel departing on 10/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Seattle to Basel

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
3:10 pm - 7:40 pmSEA-BSL
19h 30m1 stop
Lufthansa Logo
6:45 am - 7:16 pmBSL-SEA
21h 31m2 stops
$480Lufthansa
Find Deal
Wed, Nov 26 - Wed, Dec 3
Air France Logo
2:05 pm - 1:50 pmSEA-BSL
14h 45m1 stop
Air France Logo
5:55 pm - 11:50 amBSL-SEA
26h 55m1 stop
$482Air France
Find Deal
Wed, Nov 26 - Wed, Dec 3
United Airlines Logo
3:10 pm - 12:30 pmSEA-BSL
12h 20m1 stop
United Airlines Logo
9:50 am - 1:20 pmBSL-SEA
12h 30m1 stop
$483United Airlines
Find Deal
Sun, Dec 7 - Fri, Jan 9
Multiple Airlines Logo
8:10 am - 10:25 pmSEA-BSL
29h 15m2 stops
Multiple Airlines Logo
1:10 pm - 9:31 amBSL-SEA
53h 21m2 stops
$485Multiple Airlines
Find Deal
Tue, Nov 4 - Mon, Nov 10
British Airways Logo
6:50 pm - 10:15 amSEA-BSL
30h 25m1 stop
British Airways Logo
11:05 am - 11:30 amBSL-SEA
33h 25m1 stop
$488British Airways
Find Deal
Sun, Dec 7 - Thu, Jan 8
Delta Logo
2:05 pm - 9:50 amSEA-BSL
34h 45m1 stop
Delta Logo
6:05 am - 7:25 pmBSL-SEA
22h 20m2 stops
$493Delta
Find Deal
Mon, Dec 8 - Fri, Jan 9
Delta Logo
8:20 pm - 1:50 pmSEA-BSL
32h 30m2 stops
Delta Logo
6:05 am - 10:16 pmBSL-SEA
25h 11m2 stops
$496Delta
Find Deal
Mon, Dec 8 - Fri, Jan 9
Multiple Airlines Logo
8:10 am - 6:30 pmSEA-BSL
25h 20m2 stops
Multiple Airlines Logo
7:05 pm - 12:10 pmBSL-SEA
26h 05m1 stop
$497Multiple Airlines
Find Deal
Tue, Nov 4 - Mon, Nov 10
United Airlines Logo
7:00 am - 7:40 pmSEA-BSL
27h 40m2 stops
United Airlines Logo
1:10 pm - 11:30 amBSL-SEA
31h 20m2 stops
$498United Airlines
Find Deal
Wed, Dec 10 - Fri, Jan 9
British Airways Logo
6:50 pm - 5:05 pmSEA-BSL
13h 15m1 stop
British Airways Logo
7:35 pm - 11:30 amBSL-SEA
24h 55m1 stop
$513British Airways
Find Deal
Fri, Dec 5 - Thu, Jan 8

Lufthansa flights from Seattle to Basel

Our best Lufthansa deals on Seattle to Basel flight tickets
Lufthansa
Nov 26
SEA3:10 pmSeattle/Tacoma Intl
19h 30m
1 stop
BSL7:40 pmBasel EuroAirport Swiss
Dec 3
BSL6:45 amBasel EuroAirport Swiss
21h 31m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$480
Find similar
Lufthansa
Dec 7
SEA3:10 pmSeattle/Tacoma Intl
19h 30m
1 stop
BSL7:40 pmBasel EuroAirport Swiss
Jan 9
BSL9:50 amBasel EuroAirport Swiss
12h 30m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$484
Find similar
Lufthansa
Dec 7
SEA10:05 amSeattle/Tacoma Intl
17h 25m
2 stops
BSL12:30 pmBasel EuroAirport Swiss
Jan 9
BSL9:50 amBasel EuroAirport Swiss
12h 30m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$489
Find similar

Air France flights from Seattle to Basel

Our best Air France deals on Seattle to Basel flight tickets
Air France
Nov 26
SEA2:05 pmSeattle/Tacoma Intl
14h 45m
1 stop
BSL1:50 pmBasel EuroAirport Swiss
Dec 3
BSL5:55 pmBasel EuroAirport Swiss
26h 55m
1 stop
SEA11:50 amSeattle/Tacoma Intl
$482
Find similar
Air France
Nov 4
SEA3:00 pmSeattle/Tacoma Intl
34h 40m
1 stop
BSL10:40 amBasel EuroAirport Swiss
Nov 10
BSL2:30 pmBasel EuroAirport Swiss
29h 55m
1 stop
SEA11:25 amSeattle/Tacoma Intl
$507
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Basel that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 3, 2025.
Use the filters below to find and compare flights from Seattle to Basel that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 11/26

3:10 pm-7:40 pm

1 stop19h 30m

Basel EuroAirport Swiss

Wed 12/3

6:45 am-7:16 pm

2 stops21h 31m

$480

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 11/26

2:05 pm-1:50 pm

1 stop14h 45m

Basel EuroAirport Swiss

Wed 12/3

5:55 pm-11:50 am

1 stop26h 55m

$482

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 12/7

3:10 pm-12:30 pm

1 stop12h 20m

Basel EuroAirport Swiss

Fri 1/9

9:50 am-1:20 pm

1 stop12h 30m

$483

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 11/4

8:10 am-10:25 pm

2 stops29h 15m

Basel EuroAirport Swiss

Mon 11/10

1:10 pm-9:31 am

2 stops53h 21m

$485

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 12/7

6:50 pm-10:15 am

1 stop30h 25m

Basel EuroAirport Swiss

Thu 1/8

11:05 am-11:30 am

1 stop33h 25m

$488

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 12/8

2:05 pm-9:50 am

1 stop34h 45m

Basel EuroAirport Swiss

Fri 1/9

6:05 am-7:25 pm

2 stops22h 20m

$493

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 12/8

8:20 pm-1:50 pm

2 stops32h 30m

Basel EuroAirport Swiss

Fri 1/9

6:05 am-10:16 pm

2 stops25h 11m

$496

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 11/4

8:10 am-6:30 pm

2 stops25h 20m

Basel EuroAirport Swiss

Mon 11/10

7:05 pm-12:10 pm

1 stop26h 05m

$497

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 12/10

7:00 am-7:40 pm

2 stops27h 40m

Basel EuroAirport Swiss

Fri 1/9

1:10 pm-11:30 am

2 stops31h 20m

$498

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Fri 12/5

6:50 pm-5:05 pm

1 stop13h 15m

Basel EuroAirport Swiss

Thu 1/8

7:35 pm-11:30 am

1 stop24h 55m

$513

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

See travel insights to Basel from

How to get the cheapest flight ticket from Seattle to Basel

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seattle and Basel?

What is the cheapest month to fly to Basel?

If you aren’t able to travel to Basel during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $566.

What is the cheapest day to depart on your flight to Basel?

On average, the least expensive day to fly to Basel from Seattle is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $561. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Basel is Thursday, with ticket prices averaging around $997.

What is the cheapest time of day to depart on your flight to Basel?

In the morning is the cheapest time of day to fly from Seattle to Basel when you can find flight prices for as low as $643. Flying to Basel in the morning is an ideal time because this is during off-peak travel hours. Flights to Basel are more costly in the evening, with an average ticket price of $675. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Seattle to Basel flights?

You could potentially save up to 26% on your flight if you consider stops on a Seattle to Basel flight.

When to book flights from Seattle to Basel

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Basel according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Basel (SEA to EAP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Basel

Direct flights

None
There are no direct flights from Seattle to Basel. There are no popular flight routes from Seattle to Basel.
Search flight deals

  • How far is Seattle/Tacoma Intl to Basel by plane?

    A flight from Seattle/Tacoma Intl to Basel will travel around 5202.0 mi. Typically, this will take 12h 20m by plane in normal conditions.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Basel?

    Prices for flights from Seattle/Tacoma Intl Airport to Basel are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Basel?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Basel?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Basel.

  • What documentation or ID do you need to fly to Basel?

    The travel and health documents required for your trip to Basel can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Basel. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Seattle to Basel?

Best airlines flying from Seattle to Basel

Compare and see reviews for airlines that fly from Seattle to Basel with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $481Free CancellationRating
6.7
7,417 reviews
Search British Airways flights
LufthansaPriceFrom $571Free CancellationRating
6.8
7,448 reviews
Search Lufthansa flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Basel?

It is quick and easy to find Seattle to Basel flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Basel that suits you.

Can I find flights from Seattle to Basel with flexible booking policies on momondo?

Yes. All flights to Basel from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Seattle to Basel?

Once you have performed a search for Seattle to Basel flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Seattle to Basel right now. Can momondo alert me if prices change?

Price alerts on flights to Basel from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Basel trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 11/2
Sun 11/9
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Switzerland