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Cheap flights from Illinois to Basel from $304

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Basel departing on 12/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
3:50 pm - 10:05 am
STL
-
BSL
11h 15m1 stop
Lufthansa Logo
9:50 am - 11:59 pm
BSL
-
STL
21h 09m2 stops
$444Lufthansa
Fri, Jan 16 - Tue, Jan 20
Multiple Airlines Logo
4:05 pm - 6:20 pm
STL
-
BSL
19h 15m2 stops
Multiple Airlines Logo
2:20 pm - 3:29 pm
BSL
-
STL
32h 09m2 stops
$484Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
British Airways Logo
3:37 pm - 9:30 pm
STL
-
BSL
22h 53m2 stops
British Airways Logo
7:00 am - 10:44 pm
BSL
-
STL
22h 44m2 stops
$485British Airways
Fri, Jan 16 - Tue, Jan 20
United Airlines Logo
6:40 pm - 4:05 pm
STL
-
BSL
14h 25m2 stops
United Airlines Logo
1:10 pm - 10:58 pm
BSL
-
STL
16h 48m2 stops
$499United Airlines
Wed, Jan 21 - Sun, Jan 25
Turkish Airlines Logo
11:50 am - 10:00 am
ORD
-
BSL
15h 10m1 stop
Turkish Airlines Logo
10:55 am - 10:05 am
BSL
-
ORD
30h 10m1 stop
$602Turkish Airlines
Mon, Jan 19 - Tue, Feb 3
Turkish Airlines Logo
8:20 pm - 10:00 am
ORD
-
BSL
30h 40m1 stop
Turkish Airlines Logo
10:55 am - 10:05 am
BSL
-
ORD
30h 10m1 stop
$634Turkish Airlines
Sun, Feb 8 - Tue, Feb 24
United Airlines Logo
6:40 pm - 4:05 pm
STL
-
BSL
14h 25m2 stops
United Airlines Logo
9:50 am - 11:59 pm
BSL
-
STL
21h 09m3 stops
$704United Airlines
Fri, Jan 16 - Tue, Jan 20
Delta Logo
1:09 pm - 10:40 am
MDW
-
BSL
15h 31m2 stops
Delta Logo
6:15 am - 5:55 pm
BSL
-
MDW
18h 40m2 stops
$793Delta
Wed, Mar 18 - Tue, Mar 31
British Airways Logo
6:53 pm - 10:05 pm
CMI
-
BSL
20h 12m2 stops
British Airways Logo
4:25 pm - 9:35 pm
BSL
-
CMI
36h 10m2 stops
$801British Airways
Wed, Feb 11 - Sun, Feb 15
Delta Logo
1:49 pm - 1:50 pm
MDW
-
BSL
17h 01m2 stops
Delta Logo
6:05 am - 5:29 pm
BSL
-
MDW
18h 24m2 stops
$856Delta
Mon, Jan 19 - Tue, Feb 3

United Airlines flights from Illinois to Basel EuroAirport Swiss

Our best United Airlines deals on Illinois to Basel EuroAirport Swiss flight tickets
United Airlines
Jan 21
STL6:40 pmLambert-St Louis
14h 25m
2 stops
BSL4:05 pmBasel EuroAirport Swiss
Jan 25
BSL1:10 pmBasel EuroAirport Swiss
16h 48m
2 stops
STL10:58 pmLambert-St Louis
$499
Find similar
United Airlines
Jan 16
STL6:40 pmLambert-St Louis
14h 25m
2 stops
BSL4:05 pmBasel EuroAirport Swiss
Jan 20
BSL9:50 amBasel EuroAirport Swiss
21h 09m
3 stops
STL11:59 pmLambert-St Louis
$704
Find similar
United Airlines
Jan 31
STL1:15 pmLambert-St Louis
16h 15m
2 stops
BSL12:30 pmBasel EuroAirport Swiss
Feb 7
BSL9:50 amBasel EuroAirport Swiss
18h 23m
3 stops
STL9:13 pmLambert-St Louis
$806
Find similar

Turkish Airlines flights from Illinois to Basel EuroAirport Swiss

Our best Turkish Airlines deals on Illinois to Basel EuroAirport Swiss flight tickets
Turkish Airlines
Jan 19
ORD11:50 amChicago O'Hare Intl
15h 10m
1 stop
BSL10:00 amBasel EuroAirport Swiss
Feb 3
BSL10:55 amBasel EuroAirport Swiss
30h 10m
1 stop
ORD10:05 amChicago O'Hare Intl
$602
Find similar
Turkish Airlines
Feb 8
ORD11:50 amChicago O'Hare Intl
15h 10m
1 stop
BSL10:00 amBasel EuroAirport Swiss
Feb 24
BSL10:55 amBasel EuroAirport Swiss
38h 30m
1 stop
ORD6:25 pmChicago O'Hare Intl
$644
Find similar
Turkish Airlines
Jan 31
ORD8:20 pmChicago O'Hare Intl
37h 50m
1 stop
BSL5:10 pmBasel EuroAirport Swiss
Feb 7
BSL10:55 amBasel EuroAirport Swiss
30h 10m
1 stop
ORD10:05 amChicago O'Hare Intl
$668
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois 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 December 18, 2025.
Use the filters below to find and compare flights from Illinois to Basel EuroAirport Swiss that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Fri 1/16

3:50 pm-10:05 am

1 stop11h 15m

Basel EuroAirport Swiss

Tue 1/20

9:50 am-11:59 pm

2 stops21h 09m

$444

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Fri 1/30

4:05 pm-6:20 pm

2 stops19h 15m

Basel EuroAirport Swiss

Fri 2/6

2:20 pm-3:29 pm

2 stops32h 09m

$484

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Fri 1/16

3:37 pm-9:30 pm

2 stops22h 53m

Basel EuroAirport Swiss

Tue 1/20

7:00 am-10:44 pm

2 stops22h 44m

$485

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Wed 1/21

6:40 pm-4:05 pm

2 stops14h 25m

Basel EuroAirport Swiss

Sun 1/25

1:10 pm-10:58 pm

2 stops16h 48m

$499

ChicagoBasel

ORD - BSL

ORDBSL

Chicago O'Hare Intl

Mon 1/19

11:50 am-10:00 am

1 stop15h 10m

Basel EuroAirport Swiss

Tue 2/3

10:55 am-10:05 am

1 stop30h 10m

$602

ChicagoBasel

ORD - BSL

ORDBSL

Chicago O'Hare Intl

Sun 2/8

8:20 pm-10:00 am

1 stop30h 40m

Basel EuroAirport Swiss

Tue 2/24

10:55 am-10:05 am

1 stop30h 10m

$634

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Fri 1/16

6:40 pm-4:05 pm

2 stops14h 25m

Basel EuroAirport Swiss

Tue 1/20

9:50 am-11:59 pm

3 stops21h 09m

$704

ChicagoBasel

MDW - BSL

MDWBSL

Chicago Midway

Wed 3/18

1:09 pm-10:40 am

2 stops15h 31m

Basel EuroAirport Swiss

Tue 3/31

6:15 am-5:55 pm

2 stops18h 40m

$793

ChampaignBasel

CMI - BSL

CMIBSL

Champaign University-Willard

Wed 2/11

6:53 pm-10:05 pm

2 stops20h 12m

Basel EuroAirport Swiss

Sun 2/15

4:25 pm-9:35 pm

2 stops36h 10m

$801

ChicagoBasel

MDW - BSL

MDWBSL

Chicago Midway

Mon 1/19

1:49 pm-1:50 pm

2 stops17h 01m

Basel EuroAirport Swiss

Tue 2/3

6:05 am-5:29 pm

2 stops18h 24m

$856

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 Illinois 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 day to depart on your flight to Basel EuroAirport Swiss?

According to our data, Tuesday is the cheapest day to fly to Basel EuroAirport Swiss from Illinois. The lowest ticket price found for a Tuesday departure recently was $673. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Illinois to Basel EuroAirport Swiss on a Saturday will generally be more expensive and average around $915. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Basel EuroAirport Swiss is in the evening. momondo users have found flights departing from Illinois to Basel EuroAirport Swiss in the evening for as low as $671. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets in the afternoon because they tend to be around $914. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheap Illinois to Basel EuroAirport Swiss flight deals and tips

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

Fastest flight time

10h 35m

Direct flights

None
The fastest flight from Illinois to Basel EuroAirport Swiss takes 10h 35m
There are no direct flights from Illinois to Basel EuroAirport Swiss. There are no popular flight routes from Illinois to Basel EuroAirport Swiss.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Basel EuroAirport Swiss?

    Prices for flights from Illinois to Basel EuroAirport Swiss were last updated today.

  • How old do you have to be to fly from Illinois 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 Illinois to Basel EuroAirport Swiss.

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

    The travel and health documents you'll need for your trip to Basel EuroAirport Swiss may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Basel EuroAirport Swiss. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

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

It is quick and easy to find Illinois 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 Illinois to Basel with flexible booking policies on momondo?

All flight searches from Illinois to Basel on momondo can be filtered to show those which offer flexible booking policies.

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

Once you have performed a search for Illinois 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 Illinois to Basel right now. Can momondo alert me if prices change?

Price alerts on flights to Basel from Illinois 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.

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