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$441+ Cheap flights from Basel EuroAirport Swiss (BSL) to Illinois

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
BSL — ORD
Jun 21 — Jun 281
Sat 6/21
Sat 6/28
1 adult, Economy
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Cheap flight deals from Basel to Illinois

Keep the following information in mind while searching for Basel to Illinois flight deals. Data was last updated June 16, 2025.

Round-trip from

$441
(Flightnetwork)

Popular in

March

Cheapest in

October

Average price

$483
From Basel EuroAirport Swiss to Illinois
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($67 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Basel to Illinois

Cheapest flights from Basel to Illinois
Explore the most affordable flight options available from Basel to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 16, 2025.

This Flightnetwork deal was found by Cheapflights users on 6/16. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/206:35 amBSL - ORD
1 stop16h 20mBritish Airways
Thu 11/61:10 pmORD - BSL
2 stops14h 10mBritish Airways
Deal found 6/16$441
This American Airlines deal was found by Cheapflights users on 6/15. 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 12/236:55 amBSL - ORD
1 stop14h 00mAmerican Airlines
Sat 1/35:00 pmORD - BSL
1 stop21h 50mAmerican Airlines
Deal found 6/15$454
This Iberia deal was found by Cheapflights users on 6/14. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/186:10 amBSL - ORD
2 stops18h 13mMultiple Airlines
Sun 9/217:15 pmORD - BSL
1 stop20h 35mMultiple Airlines
Deal found 6/14$461
This Delta deal was found by Cheapflights users on 6/16. 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 10/2010:15 amBSL - ORD
1 stop11h 25mDelta
Mon 11/34:25 pmORD - BSL
1 stop18h 00mDelta
Deal found 6/16$570
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Mon 10/2011:30 amBSL - ORD
2 stops28h 43mUnited Airlines
Thu 11/612:00 pmORD - BSL
2 stops14h 05mUnited Airlines
Deal found 6/16$608
This Lufthansa deal was found by Cheapflights users on 6/14. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/306:05 amBSL - ORD
1 stop15h 50mLufthansa
Sun 7/133:35 pmORD - BSL
1 stop10h 35mLufthansa
Deal found 6/14$611
This Air Canada deal was found by Cheapflights users on 6/13. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/911:25 amBSL - ORD
2 stops27h 34mAir Canada
Wed 7/168:40 amORD - BSL
2 stops19h 15mAir Canada
Deal found 6/13$615
This Delta deal was found by Cheapflights users on 6/16. 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 10/206:15 amBSL - MDW
2 stops19h 21mDelta
Thu 11/69:30 amMDW - BSL
2 stops18h 10mDelta
Deal found 6/16$630
This KLM deal was found by Cheapflights users on 6/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1810:15 amBSL - ORD
2 stops15h 23mKLM
Sun 9/215:20 pmORD - BSL
2 stops13h 30mKLM
Deal found 6/14$651
This Austrian Airlines deal was found by Cheapflights users on 6/16. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/78:25 pmBSL - ORD
1 stop23h 55mAustrian Airlines
Sat 8/164:20 pmORD - BSL
1 stop20h 25mAustrian Airlines
Deal found 6/16$675
This Delta deal was found by Cheapflights users on 6/15. 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.
Tue 7/110:15 amBSL - STL
2 stops17h 38mDelta
Sat 7/55:23 pmSTL - BSL
2 stops33h 07mDelta
Deal found 6/15$805
This flugladen.de deal was found by Cheapflights users on 6/14. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/296:15 amBSL - MDW
2 stops19h 25mAir France
Tue 8/51:46 pmMDW - BSL
2 stops16h 24mAir France
Deal found 6/14$830

Cheapflights Fare Finder

Customize your flight search to find flights from Basel to Illinois 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 June 16, 2025.
Use the filters below to find and compare flights from Basel EuroAirport Swiss to Illinois that are best for you.

Fly from

Basel

Fly to

Illinois

Route

Depart

Return

Price

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Mon 10/20

6:35 am-3:55 pm

1 stop16h 20m

Chicago O'Hare Intl

Thu 11/6

1:10 pm-10:20 am

2 stops14h 10m

$441

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Mon 10/20

6:35 am-1:50 pm

1 stop14h 15m

Chicago O'Hare Intl

Mon 11/3

4:34 pm-2:35 pm

2 stops15h 01m

$459

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Thu 9/18

6:10 am-5:23 pm

2 stops18h 13m

Chicago O'Hare Intl

Sun 9/21

7:15 pm-10:50 pm

1 stop20h 35m

$461

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Mon 10/20

10:15 am-2:40 pm

1 stop11h 25m

Chicago O'Hare Intl

Mon 11/3

4:25 pm-5:25 pm

1 stop18h 00m

$570

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Mon 10/20

11:30 am-9:13 am

2 stops28h 43m

Chicago O'Hare Intl

Thu 11/6

12:00 pm-9:05 am

2 stops14h 05m

$608

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Mon 6/30

6:05 am-2:55 pm

1 stop15h 50m

Chicago O'Hare Intl

Sun 7/13

3:35 pm-9:10 am

1 stop10h 35m

$611

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Wed 7/9

11:25 am-7:59 am

2 stops27h 34m

Chicago O'Hare Intl

Wed 7/16

8:40 am-10:55 am

2 stops19h 15m

$615

BaselChicago

BSL - MDW

BSLMDW

Basel EuroAirport Swiss

Mon 10/20

6:15 am-6:36 pm

2 stops19h 21m

Chicago Midway

Thu 11/6

9:30 am-10:40 am

2 stops18h 10m

$630

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Thu 9/18

10:15 am-6:38 pm

2 stops15h 23m

Chicago O'Hare Intl

Sun 9/21

5:20 pm-1:50 pm

2 stops13h 30m

$651

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Mon 7/7

8:25 pm-1:20 pm

1 stop23h 55m

Chicago O'Hare Intl

Sat 8/16

4:20 pm-7:45 pm

1 stop20h 25m

$675

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/15

Showing 1-10 of 22 results
1
2
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Best time to book a flight from Basel to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Basel 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 Basel EuroAirport Swiss to Illinois

Rainfall in Illinois by month

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

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated June 16, 2025.
Read reviews from past customers who have flown Delta, KLM and Austrian Airlines from Basel to Illinois. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,963 reviews

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,963 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,361 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
804 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,466 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,801 reviews
Delta
8.0
Very good
7,963 reviews

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Basel to Illinois. 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 from for flights from Basel to Illinois?

    For a flight from Basel to Illinois, you will be flying from EuroAirport Swiss. Basel EuroAirport Swiss (BSL) is just 3.6 mi from the center of the city.

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

    $613 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Lufthansa and Delta, with prices starting from $639 and $1,255, respectively.

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

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

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Basel to Illinois 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 Basel EuroAirport Swiss to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Basel EuroAirport Swiss to Illinois (average of $245). Flying from Basel EuroAirport Swiss to Illinois in March is currently the most expensive (average of $321). 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.

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Alternative routes for Basel to Illinois

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