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$268+ Cheap flights from Illinois to Basel EuroAirport Swiss (BSL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BSL
Dec 24 — Dec 311
Wed 12/24
Wed 12/31
1 adult, Economy
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Cheap flight deals from Illinois to Basel

Keep the following information in mind while searching for Illinois to Basel flight deals. Data was last updated November 24, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$445
(Kiwi.com)

One-way from

$268
(Trip.com)

Popular in

November

Cheapest in

September

Average price

$1,454
Provider with most accurate pricing for Chicago (CHI)-Basel (EAP) flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Basel (EAP) flights.
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From Illinois to Basel EuroAirport Swiss
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One-way flight from Illinois to Basel EuroAirport Swiss
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Highest demand for flights based on searches. 20% potential increase in price ($239 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($60 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Illinois to Basel

Cheapest flights from Illinois to Basel
Explore the most affordable flight options available from Illinois to Basel. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 24, 2025.

This Flysmarter deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1512:49 pmSTL - BSL
2 stops14h 51mAir France
Fri 1/166:05 amBSL - STL
2 stops18h 45mAir France
Deal found 11/22$707
This lastminute.com deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/711:50 amORD - BSL
1 stop15h 10mTurkish Airlines
Sun 12/2110:55 amBSL - ORD
1 stop30h 10mTurkish Airlines
Deal found 11/22$1,103
This lastminute.com deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2711:50 amORD - BSL
1 stop15h 10mTurkish Airlines
Thu 12/116:05 pmBSL - ORD
1 stop23h 00mTurkish Airlines
Deal found 11/22$1,163
This Air France deal was found by Cheapflights users on 11/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/241:22 pmSTL - BSL
2 stops14h 18mMultiple Airlines
Wed 12/316:05 amBSL - STL
2 stops19h 59mMultiple Airlines
Deal found 11/23$1,166
This lastminute.com deal was found by Cheapflights users on 11/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/811:50 amORD - BSL
1 stop15h 10mTurkish Airlines
Mon 12/2210:55 amBSL - ORD
1 stop30h 10mTurkish Airlines
Deal found 11/23$1,169
This Cheapflightsfares deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:00 pmORD - BSL
1 stop11h 30mMultiple Airlines
Thu 12/1810:35 amBSL - ORD
1 stop11h 45mMultiple Airlines
Deal found 11/22$1,231
This Cheapflightsfares deal was found by Cheapflights users on 11/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/114:20 pmORD - BSL
1 stop10h 35mMultiple Airlines
Tue 12/2310:35 amBSL - ORD
2 stops14h 50mMultiple Airlines
Deal found 11/23$1,275
This Ovago deal was found by Cheapflights users on 11/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/243:50 pmSTL - BSL
1 stop19h 40mLufthansa
Wed 12/3110:35 amBSL - STL
2 stops18h 08mLufthansa
Deal found 11/23$1,337
This lastminute.com deal was found by Cheapflights users on 11/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1111:50 amORD - BSL
1 stop15h 10mTurkish Airlines
Thu 12/256:05 pmBSL - ORD
1 stop23h 00mTurkish Airlines
Deal found 11/23$1,386
This lastminute.com deal was found by Cheapflights users on 11/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1211:50 amORD - BSL
1 stop22h 20mTurkish Airlines
Fri 12/266:05 pmBSL - ORD
1 stop23h 00mTurkish Airlines
Deal found 11/22$1,451
This KAYAK deal was found by Cheapflights users on 11/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/274:20 pmORD - BSL
1 stop20h 25mAustrian Airlines
Sun 1/48:25 pmBSL - ORD
2 stops24h 45mAustrian Airlines
Deal found 11/23$1,496
This Mytrip deal was found by Cheapflights users on 11/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/222:00 pmORD - BSL
2 stops24h 20mMultiple Airlines
Mon 12/297:40 amBSL - ORD
2 stops17h 45mMultiple Airlines
Deal found 11/23$1,524

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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, Cheapflights users made 2,558,603 searches. Data last updated November 24, 2025.
Use the filters below to find and compare flights from Illinois to Basel EuroAirport Swiss that are best for you.

Fly from

Illinois

Fly to

Basel

Route

Depart

Return

Price

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Wed 1/14

3:50 pm-9:55 am

1 stop11h 05m

Basel EuroAirport Swiss

Wed 1/21

10:35 am-10:58 pm

2 stops19h 23m

$445

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Thu 1/15

12:44 pm-12:30 pm

2 stops16h 46m

Basel EuroAirport Swiss

Wed 1/21

1:10 pm-11:59 pm

2 stops17h 49m

$489

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Thu 1/15

5:04 pm-10:50 pm

2 stops22h 46m

Basel EuroAirport Swiss

Wed 1/21

11:10 am-10:59 pm

2 stops18h 49m

$491

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Wed 1/28

9:59 am-9:50 am

2 stops16h 51m

Basel EuroAirport Swiss

Sun 2/1

11:15 am-4:37 pm

2 stops36h 22m

$495

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Wed 1/28

11:22 am-9:10 am

2 stops14h 48m

Basel EuroAirport Swiss

Sun 2/1

10:45 am-10:58 pm

2 stops19h 13m

$495

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Tue 1/6

11:20 am-7:40 pm

2 stops25h 20m

Basel EuroAirport Swiss

Tue 1/13

9:50 am-7:27 pm

2 stops16h 37m

$498

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Wed 1/14

11:22 am-9:10 am

2 stops14h 48m

Basel EuroAirport Swiss

Wed 1/21

1:10 pm-11:59 pm

3 stops17h 49m

$622

ChicagoBasel

ORD - BSL

ORDBSL

Chicago O'Hare Intl

Wed 2/18

11:50 am-10:00 am

1 stop15h 10m

Basel EuroAirport Swiss

Sun 2/22

10:55 am-10:05 am

1 stop30h 10m

$695

ChampaignBasel

CMI - BSL

CMIBSL

Champaign University-Willard

Wed 2/11

6:00 am-2:55 pm

2 stops25h 55m

Basel EuroAirport Swiss

Sun 2/15

11:20 am-9:34 pm

2 stops17h 14m

$698

ChicagoBasel

ORD - BSL

ORDBSL

Chicago O'Hare Intl

Wed 2/11

11:50 am-10:00 am

1 stop15h 10m

Basel EuroAirport Swiss

Sun 2/15

6:05 pm-6:25 pm

1 stop31h 20m

$705

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/23

Showing 1-10 of 34 results
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Best time to book a flight from Illinois to Basel

Have a flexible travel schedule? Discover the best time to fly to Basel from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Basel EuroAirport Swiss
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Basel. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Basel from Illinois?

    If you book a flight to Basel from Illinois, you will be flying to EuroAirport Swiss, which is the city’s only airport. Basel EuroAirport Swiss (BSL) is located 3.6 mi from the center of Basel.

  • How long is the flight from Illinois to Basel EuroAirport Swiss?

    Lufthansa, United Airlines, and British Airways can get you from Illinois to Basel EuroAirport Swiss in just under 11h 05m. Your travel time can differ by up to 11h 41m. There are 4630 mi between Illinois and Basel EuroAirport Swiss. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Illinois to Basel EuroAirport Swiss?

    Most travelers choose Chicago O'Hare Intl - Basel EuroAirport Swiss, Lambert-St Louis - Basel EuroAirport Swiss or Chicago Midway - Basel EuroAirport Swiss when deciding on the best route from Illinois to Basel EuroAirport Swiss.

  • Can I find deals for flights from Illinois to Basel that include hotel bookings?

    Yes. In addition to deals on Illinois to Basel flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Basel?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Basel.

  • Can I find deals for business class flights from Illinois to Basel?

    Yes. Cheapflights offers flight deals from Illinois to Basel by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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