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Cheap flights from Seattle to Basel from $357

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 2/16. 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

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:10 pm - 1:50 pm
SEA
-
BSL
14h 40m
1 stop
Multiple Airlines Logo
5:55 pm - 12:35 pm
BSL
-
SEA
26h 40m
1 stop
$480Multiple Airlines
Mon, Mar 2 - Mon, Mar 9
Delta Logo
3:10 pm - 1:50 pm
SEA
-
BSL
14h 40m
1 stop
Delta Logo
11:15 am - 12:35 pm
BSL
-
SEA
33h 20m
1 stop
$484Delta
Mon, Mar 9 - Wed, Mar 18
British Airways Logo
1:37 pm - 10:20 pm
SEA
-
BSL
23h 43m
2 stops
British Airways Logo
7:05 pm - 5:55 pm
BSL
-
SEA
30h 50m
1 stop
$485British Airways
Tue, Mar 3 - Tue, Mar 10
Delta Logo
3:10 pm - 9:50 am
SEA
-
BSL
34h 40m
1 stop
Delta Logo
11:15 am - 12:35 pm
BSL
-
SEA
33h 20m
1 stop
$486Delta
Sun, Mar 8 - Mon, Mar 16
British Airways Logo
6:50 pm - 2:55 pm
SEA
-
BSL
35h 05m
1 stop
British Airways Logo
7:00 am - 5:55 pm
BSL
-
SEA
18h 55m
1 stop
$487British Airways
Tue, Mar 3 - Tue, Mar 10
British Airways Logo
1:35 pm - 2:10 pm
SEA
-
BSL
15h 35m
1 stop
British Airways Logo
6:20 am - 5:55 pm
BSL
-
SEA
19h 35m
1 stop
$488British Airways
Fri, Mar 6 - Wed, Mar 11
Delta Logo
7:10 am - 1:50 pm
SEA
-
BSL
21h 40m
2 stops
Delta Logo
11:15 am - 12:35 pm
BSL
-
SEA
33h 20m
1 stop
$489Delta
Tue, Mar 3 - Wed, Mar 11
Air France Logo
4:05 pm - 10:05 pm
SEA
-
BSL
22h 00m
1 stop
Air France Logo
6:05 am - 12:35 pm
BSL
-
SEA
14h 30m
1 stop
$490Air France
Wed, Mar 18 - Wed, Mar 25
British Airways Logo
1:25 pm - 3:05 pm
SEA
-
BSL
16h 40m
1 stop
British Airways Logo
7:00 am - 12:30 pm
BSL
-
SEA
13h 30m
1 stop
$491British Airways
Tue, Mar 3 - Tue, Mar 17
Air France Logo
8:05 am - 10:40 am
SEA
-
BSL
17h 35m
2 stops
Air France Logo
6:05 am - 4:41 pm
BSL
-
SEA
18h 36m
2 stops
$492Air France
Mon, Mar 2 - Mon, Mar 9

Lufthansa flights from Seattle to Basel EuroAirport Swiss

Our best Lufthansa deals on Seattle to Basel EuroAirport Swiss flight tickets
Lufthansa
Mar 22
SEA7:00 amSeattle/Tacoma Intl
18h 55m
2 stops
BSL9:55 amBasel EuroAirport Swiss
Mar 29
BSL8:20 amBasel EuroAirport Swiss
19h 40m
2 stops
SEA7:00 pmSeattle/Tacoma Intl
$651
Lufthansa
Feb 15
SEA3:10 pmSeattle/Tacoma Intl
12h 20m
1 stop
BSL12:30 pmBasel EuroAirport Swiss
Feb 22
BSL9:50 amBasel EuroAirport Swiss
12h 30m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$1,635
Lufthansa
Feb 15
SEA3:10 pmSeattle/Tacoma Intl
13h 35m
2 stops
BSL1:45 pmBasel EuroAirport Swiss
Feb 22
BSL9:50 amBasel EuroAirport Swiss
12h 30m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$1,665

Air France flights from Seattle to Basel EuroAirport Swiss

Our best Air France deals on Seattle to Basel EuroAirport Swiss flight tickets
Air France
Mar 18
SEA4:05 pmSeattle/Tacoma Intl
22h 00m
1 stop
BSL10:05 pmBasel EuroAirport Swiss
Mar 25
BSL6:05 amBasel EuroAirport Swiss
14h 30m
1 stop
SEA12:35 pmSeattle/Tacoma Intl
$490
Air France
Mar 2
SEA8:05 amSeattle/Tacoma Intl
17h 35m
2 stops
BSL10:40 amBasel EuroAirport Swiss
Mar 9
BSL6:05 amBasel EuroAirport Swiss
18h 36m
2 stops
SEA4:41 pmSeattle/Tacoma Intl
$492
Air France
Mar 22
SEA4:05 pmSeattle/Tacoma Intl
34h 35m
1 stop
BSL10:40 amBasel EuroAirport Swiss
Mar 29
BSL2:25 pmBasel EuroAirport Swiss
30h 20m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$540

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Basel EuroAirport Swiss 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 February 5, 2026.
Use the filters below to find and compare flights from Seattle to Basel EuroAirport Swiss that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 3/2

2:10 pm-1:50 pm

1 stop14h 40m

Basel EuroAirport Swiss

Mon 3/9

5:55 pm-12:35 pm

1 stop26h 40m

$480

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 3/9

3:10 pm-1:50 pm

1 stop14h 40m

Basel EuroAirport Swiss

Wed 3/18

11:15 am-12:35 pm

1 stop33h 20m

$484

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/3

1:37 pm-10:20 pm

2 stops23h 43m

Basel EuroAirport Swiss

Tue 3/10

7:05 pm-5:55 pm

1 stop30h 50m

$485

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 3/8

3:10 pm-9:50 am

1 stop34h 40m

Basel EuroAirport Swiss

Mon 3/16

11:15 am-12:35 pm

1 stop33h 20m

$486

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/3

6:50 pm-2:55 pm

1 stop35h 05m

Basel EuroAirport Swiss

Tue 3/10

7:00 am-5:55 pm

1 stop18h 55m

$487

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Fri 3/6

1:35 pm-2:10 pm

1 stop15h 35m

Basel EuroAirport Swiss

Wed 3/11

6:20 am-5:55 pm

1 stop19h 35m

$488

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/3

7:10 am-1:50 pm

2 stops21h 40m

Basel EuroAirport Swiss

Wed 3/11

11:15 am-12:35 pm

1 stop33h 20m

$489

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 3/18

4:05 pm-10:05 pm

1 stop22h 00m

Basel EuroAirport Swiss

Wed 3/25

6:05 am-12:35 pm

1 stop14h 30m

$490

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/3

1:25 pm-3:05 pm

1 stop16h 40m

Basel EuroAirport Swiss

Tue 3/17

7:00 am-12:30 pm

1 stop13h 30m

$491

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 3/2

8:05 am-10:40 am

2 stops17h 35m

Basel EuroAirport Swiss

Mon 3/9

6:05 am-4:41 pm

2 stops18h 36m

$492

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Basel from

How to get the cheapest flight ticket from Seattle to Basel EuroAirport Swiss

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 cheapest month to fly to Basel EuroAirport Swiss?

If you are unable to visit Basel EuroAirport Swiss during the month of August, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $509.

Can stopping save me money on Seattle to Basel EuroAirport Swiss flights?

You could potentially save up to 23% on your flight if you consider stops on a Seattle to Basel EuroAirport Swiss flight.

When to book flights from Seattle to Basel EuroAirport Swiss

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

Cheap Seattle to Basel EuroAirport Swiss (SEA to BSL) flight deals and tips

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

Fastest flight time

14h 20m

Direct flights

None
The fastest flight from Seattle to Basel EuroAirport Swiss takes 14h 20m
There are no direct flights from Seattle to Basel EuroAirport Swiss. There are no popular flight routes from Seattle to Basel EuroAirport Swiss.
Search flight deals

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

    Seattle/Tacoma Intl and Basel EuroAirport Swiss are 5198.6 mi apart from one another. A reasonable flight in good conditions will take 14h 20m.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Basel EuroAirport Swiss refresh daily.

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

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

    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 EuroAirport Swiss.

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

    The travel and health documents required for your trip to Basel EuroAirport Swiss 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 EuroAirport Swiss. 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 EuroAirport Swiss?

Best airlines flying from Seattle to Basel EuroAirport Swiss

Compare and see reviews for airlines that fly from Seattle to Basel EuroAirport Swiss with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $467Free CancellationRating
6.7
7,716 reviews
Search British Airways flights
LufthansaPriceFrom $483Free CancellationRating
6.8
7,762 reviews
Search Lufthansa flights

Why use momondo?

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

Finding the right flight to Basel from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Basel quick and easy, saving you time and money.

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

Flights from Seattle to Basel with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Seattle to Basel flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are simply researching potential flights to Basel, momondo offers a useful price alert feature which will track prices for flights to Basel from Seattle and alert you when they change.

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