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Cheap flights from Seattle to Basel from $382

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 9/2. 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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Find the cheapest flights from Seattle to Basel

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
3:17 pm - 7:30 pm
SEA
-
BSL
19h 13m
2 stops
Multiple Airlines Logo
12:10 pm - 12:36 am
BSL
-
SEA
21h 26m
2 stops
$822Multiple Airlines
mié., abr. 8 - lun., abr. 13
Multiple Airlines Logo
3:17 pm - 7:30 pm
SEA
-
BSL
19h 13m
2 stops
Multiple Airlines Logo
2:10 pm - 6:25 pm
BSL
-
SEA
13h 15m
1 stop
$987Multiple Airlines
mié., abr. 8 - lun., abr. 13
Lufthansa Logo
6:50 pm - 7:40 pm
SEA
-
BSL
15h 50m
1 stop
Lufthansa Logo
6:45 pm - 12:20 pm
BSL
-
SEA
26h 35m
1 stop
$1,040Lufthansa
mié., abr. 8 - lun., abr. 13
Air France Logo
1:30 pm - 1:30 pm
SEA
-
BSL
15h 00m
1 stop
Air France Logo
6:30 am - 11:33 am
BSL
-
SEA
14h 03m
1 stop
$1,060Air France
dom., jul. 19 - jue., jul. 30
Delta Logo
9:50 am - 1:30 pm
SEA
-
BSL
18h 40m
2 stops
Delta Logo
10:35 am - 5:27 pm
BSL
-
SEA
15h 52m
1 stop
$1,072Delta
dom., jul. 19 - jue., jul. 30
Lufthansa Logo
6:50 pm - 6:10 pm
SEA
-
BSL
14h 20m
2 stops
Lufthansa Logo
9:50 am - 4:59 pm
BSL
-
SEA
16h 09m
1 stop
$1,074Lufthansa
dom., jul. 19 - jue., jul. 30
Delta Logo
9:50 am - 1:30 pm
SEA
-
BSL
18h 40m
2 stops
Delta Logo
10:35 am - 11:26 pm
BSL
-
SEA
21h 51m
2 stops
$1,082Delta
dom., jul. 19 - jue., jul. 30
Lufthansa Logo
6:50 pm - 6:10 pm
SEA
-
BSL
14h 20m
2 stops
Lufthansa Logo
8:15 am - 4:59 pm
BSL
-
SEA
17h 44m
2 stops
$1,103Lufthansa
dom., jul. 19 - jue., jul. 30
Turkish Airlines Logo
7:10 pm - 9:45 am
SEA
-
BSL
29h 35m
1 stop
Turkish Airlines Logo
7:10 pm - 5:15 pm
BSL
-
SEA
31h 05m
1 stop
$1,104Turkish Airlines
mié., jun. 3 - mar., jun. 16
Multiple Airlines Logo
7:00 pm - 2:15 pm
SEA
-
BSL
34h 15m
2 stops
Multiple Airlines Logo
9:20 pm - 1:40 pm
BSL
-
SEA
25h 20m
1 stop
$1,114Multiple Airlines
lun., may. 11 - sáb., may. 30

Lufthansa flights from Seattle to Basel EuroAirport Swiss

Our best Lufthansa deals on Seattle to Basel EuroAirport Swiss flight tickets
Lufthansa
Apr 8
SEA6:50 pmSeattle/Tacoma Intl
15h 50m
1 stop
BSL7:40 pmBasel EuroAirport Swiss
Apr 13
BSL6:45 pmBasel EuroAirport Swiss
26h 35m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$1,040
Lufthansa
Jul 19
SEA6:50 pmSeattle/Tacoma Intl
14h 20m
2 stops
BSL6:10 pmBasel EuroAirport Swiss
Jul 30
BSL9:50 amBasel EuroAirport Swiss
16h 09m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$1,074
Lufthansa
Jul 19
SEA6:50 pmSeattle/Tacoma Intl
14h 20m
2 stops
BSL6:10 pmBasel EuroAirport Swiss
Jul 30
BSL8:15 amBasel EuroAirport Swiss
17h 44m
2 stops
SEA4:59 pmSeattle/Tacoma Intl
$1,103

Delta flights from Seattle to Basel EuroAirport Swiss

Our best Delta deals on Seattle to Basel EuroAirport Swiss flight tickets
Delta
Mar 30
SEA7:15 amSeattle/Tacoma Intl
21h 30m
2 stops
BSL1:45 pmBasel EuroAirport Swiss
Apr 14
BSL6:30 amBasel EuroAirport Swiss
19h 00m
1 stop
SEA4:30 pmSeattle/Tacoma Intl
$822
Delta
Mar 30
SEA1:45 pmSeattle/Tacoma Intl
19h 10m
1 stop
BSL5:55 pmBasel EuroAirport Swiss
Apr 14
BSL6:30 amBasel EuroAirport Swiss
14h 15m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$823
Delta
Jul 19
SEA9:50 amSeattle/Tacoma Intl
18h 40m
2 stops
BSL1:30 pmBasel EuroAirport Swiss
Jul 30
BSL10:35 amBasel EuroAirport Swiss
15h 52m
1 stop
SEA5:27 pmSeattle/Tacoma Intl
$1,072

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 marzo 23, 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

Cheapest round-trip

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 4/8

3:17 pm-7:30 pm

2 stops19h 13m

Basel EuroAirport Swiss

lun. 4/13

12:10 pm-12:36 am

2 stops21h 26m

$822

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 4/8

3:17 pm-7:30 pm

2 stops19h 13m

Basel EuroAirport Swiss

lun. 4/13

2:10 pm-6:25 pm

1 stop13h 15m

$987

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 4/8

6:50 pm-7:40 pm

1 stop15h 50m

Basel EuroAirport Swiss

lun. 4/13

6:45 pm-12:20 pm

1 stop26h 35m

$1,040
Quickest round-trip

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

dom. 7/19

1:30 pm-1:30 pm

1 stop15h 00m

Basel EuroAirport Swiss

jue. 7/30

6:30 am-11:33 am

1 stop14h 03m

$1,060

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

dom. 7/19

9:50 am-1:30 pm

2 stops18h 40m

Basel EuroAirport Swiss

jue. 7/30

10:35 am-5:27 pm

1 stop15h 52m

$1,072

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

dom. 7/19

6:50 pm-6:10 pm

2 stops14h 20m

Basel EuroAirport Swiss

jue. 7/30

9:50 am-4:59 pm

1 stop16h 09m

$1,074

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

dom. 7/19

9:50 am-1:30 pm

2 stops18h 40m

Basel EuroAirport Swiss

jue. 7/30

10:35 am-11:26 pm

2 stops21h 51m

$1,082

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

dom. 7/19

6:50 pm-6:10 pm

2 stops14h 20m

Basel EuroAirport Swiss

jue. 7/30

8:15 am-4:59 pm

2 stops17h 44m

$1,103

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

mié. 6/3

7:10 pm-9:45 am

1 stop29h 35m

Basel EuroAirport Swiss

mar. 6/16

7:10 pm-5:15 pm

1 stop31h 05m

$1,104

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

lun. 5/11

7:00 pm-2:15 pm

2 stops34h 15m

Basel EuroAirport Swiss

sáb. 5/30

9:20 pm-1:40 pm

1 stop25h 20m

$1,114

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 $490.

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

You could potentially save up to 3% 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

12h 25m

Direct flights

None
The fastest flight from Seattle to Basel EuroAirport Swiss takes 12h 25m
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 12h 25m.

  • 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
7,813 reviews
Search British Airways flights
LufthansaPriceFrom $483Free CancellationRating
6.8
7,860 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.

An easier way to manage your Basel EuroAirport Swiss trip

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mié. 4/22
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