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$344+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BSL
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$578
(oojo)

One-way from

$344
(Kiwi.com)

Popular in

May

Cheapest in

September

Average price

$1,463
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. 18% potential increase in price ($234 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($44 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This oojo deal was found by Cheapflights users on 5/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1811:45 pmORD - BSL
1 stop26h 55mTurkish Airlines
Tue 10/216:55 pmBSL - ORD
1 stop30h 00mTurkish Airlines
Deal found 5/1$578
This oojo deal was found by Cheapflights users on 4/30. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/264:52 pmSTL - BSL
2 stops20h 08mBritish Airways
Sun 11/96:35 amBSL - STL
2 stops20h 41mBritish Airways
Deal found 4/30$624
This United Airlines deal was found by Cheapflights users on 4/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/264:45 pmSTL - BSL
1 stop14h 45mUnited Airlines
Sun 11/92:15 pmBSL - STL
2 stops32h 11mUnited Airlines
Deal found 4/30$661
This FlightHub deal was found by Cheapflights users on 4/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/264:45 pmSTL - BSL
1 stop11h 15mLufthansa
Sun 11/96:50 amBSL - STL
1 stop14h 05mLufthansa
Deal found 4/30$667
This United deal was found by Cheapflights users on 5/1. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/223:30 pmSTL - BSL
1 stop19h 20mMultiple Airlines
Fri 10/311:05 pmBSL - STL
2 stops57h 21mMultiple Airlines
Deal found 5/1$682
This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/910:35 pmORD - BSL
1 stop17h 15mAmerican Airlines
Thu 9/256:10 amBSL - ORD
2 stops16h 35mAmerican Airlines
Deal found 4/30$701
This Vueling Global deal was found by Cheapflights users on 4/30. 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 Vueling Global is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/254:30 pmORD - BSL
2 stops37h 30mMultiple Airlines
Sat 9/611:10 amBSL - ORD
2 stops34h 05mMultiple Airlines
Deal found 4/30$758
This Gotogate deal was found by Cheapflights users on 4/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/258:40 amORD - BSL
2 stops19h 10mAir Canada
Sat 9/611:30 amBSL - ORD
2 stops15h 41mAir Canada
Deal found 4/30$764
This lastminute.com deal was found by Cheapflights users on 5/1. 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.
Wed 10/13:35 pmORD - BSL
1 stop10h 35mLufthansa
Wed 10/151:00 pmBSL - ORD
1 stop12h 15mLufthansa
Deal found 5/1$794
This United Airlines deal was found by Cheapflights users on 4/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1411:55 amORD - BSL
2 stops14h 15mUnited Airlines
Wed 5/211:00 pmBSL - ORD
1 stop12h 15mUnited Airlines
Deal found 4/30$802
This British Airways deal was found by Cheapflights users on 4/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2711:54 amORD - BSL
2 stops16h 26mBritish Airways
Sat 9/66:35 amBSL - ORD
1 stop14h 15mBritish Airways
Deal found 4/30$819
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/251:00 pmMDW - BSL
2 stops18h 10mDelta
Sat 9/66:15 amBSL - MDW
2 stops18h 48mDelta
Deal found 4/30$853

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 May 1, 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

ChicagoBasel

ORD - BSL

ORDBSL

Chicago O'Hare Intl

Sat 10/18

11:45 pm-9:40 am

1 stop26h 55m

Basel EuroAirport Swiss

Tue 10/21

6:55 pm-5:55 pm

1 stop30h 00m

$578

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Sun 10/26

4:52 pm-7:00 pm

2 stops20h 08m

Basel EuroAirport Swiss

Sun 11/9

6:35 am-8:16 pm

2 stops20h 41m

$624

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Sun 10/26

4:45 pm-1:30 pm

1 stop14h 45m

Basel EuroAirport Swiss

Sun 11/9

2:15 pm-3:26 pm

2 stops32h 11m

$661

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Sun 10/26

4:45 pm-10:00 am

1 stop11h 15m

Basel EuroAirport Swiss

Sun 11/9

6:50 am-1:55 pm

1 stop14h 05m

$667

St. LouisBasel

STL - BSL

STLBSL

Lambert-St Louis

Wed 10/22

3:30 pm-5:50 pm

1 stop19h 20m

Basel EuroAirport Swiss

Fri 10/31

1:05 pm-4:26 pm

2 stops57h 21m

$682

ChicagoBasel

ORD - BSL

ORDBSL

Chicago O'Hare Intl

Tue 9/9

10:35 pm-10:50 pm

1 stop17h 15m

Basel EuroAirport Swiss

Thu 9/25

6:10 am-3:45 pm

2 stops16h 35m

$701

ChicagoBasel

ORD - BSL

ORDBSL

Chicago O'Hare Intl

Mon 8/25

4:30 pm-1:00 pm

2 stops37h 30m

Basel EuroAirport Swiss

Sat 9/6

11:10 am-2:15 pm

2 stops34h 05m

$758

ChicagoBasel

ORD - BSL

ORDBSL

Chicago O'Hare Intl

Mon 8/25

8:40 am-10:50 am

2 stops19h 10m

Basel EuroAirport Swiss

Sat 9/6

11:30 am-8:11 pm

2 stops15h 41m

$764

ChicagoBasel

ORD - BSL

ORDBSL

Chicago O'Hare Intl

Wed 10/1

3:35 pm-9:10 am

1 stop10h 35m

Basel EuroAirport Swiss

Wed 10/15

1:00 pm-6:15 pm

1 stop12h 15m

$794

ChicagoBasel

ORD - BSL

ORDBSL

Chicago O'Hare Intl

Wed 5/14

11:55 am-9:10 am

2 stops14h 15m

Basel EuroAirport Swiss

Wed 5/21

1:00 pm-6:15 pm

1 stop12h 15m

$802

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 30 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

What is the cheapest time of day to fly from IL to BSL?

Find hourly flight availability from Illinois to Basel. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Basel EuroAirport Swiss as you normally would.

Rainfall in Basel by month

Plan your trip to Basel by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Basel EuroAirport Swiss ranges from 1.9 - 3.4 inches per month. June is typically the wettest month, when rainfall can reach 3.4 in. February is typically the driest time to visit Basel EuroAirport Swiss when rainfall is around 1.9 in.

Temperature in Basel by month

Plan your trip to Basel by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Basel EuroAirport Swiss, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Basel

Get insights into the airlines that provide service to Basel. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Basel. Reviews last updated May 1, 2025.
Get a feel of what it's like to fly with Delta, KLM and Austrian Airlines from Illinois to Basel by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
781 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,448 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

Crew

8.5

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines to fly from Illinois to Basel EuroAirport Swiss one-way?

    The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as $523. However, be on the lookout for offers from Turkish Airlines and American Airlines, as they are both options that can get you from Illinois to Basel EuroAirport Swiss for a low price.

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

    Most travelers choose Chicago O'Hare Intl - Basel EuroAirport Swiss, Chicago Midway - Basel EuroAirport Swiss or Lambert-St Louis - 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.

  • What is the cheapest month to book a flight from Illinois to Basel EuroAirport Swiss?

    Currently, January is the cheapest month in which you can book a flight from Illinois to Basel EuroAirport Swiss (average of $545). Flying from Illinois to Basel EuroAirport Swiss in June is currently the most expensive (average of $1,132). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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