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$450+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
BSL — ORD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$450
(American Airlines)

Popular in

July

Cheapest in

October

Average price

$498
Provider with most accurate pricing for Basel (EAP)-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Basel (EAP)-Chicago (CHI) flights.
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From Basel EuroAirport Swiss to Illinois
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Highest demand for flights based on searches. 15% potential increase in price ($106 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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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 February 20, 2025.

This American Airlines deal was found by Cheapflights users on 2/20. 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 4/16:45 amBSL - ORD
1 stop15h 00mAmerican Airlines
Mon 4/78:20 pmORD - BSL
1 stop19h 30mAmerican Airlines
Deal found 2/20$450
This British Airways deal was found by Cheapflights users on 2/20. 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.
Thu 3/1311:15 amBSL - ORD
1 stop12h 25mBritish Airways
Wed 3/267:30 pmORD - BSL
1 stop13h 20mBritish Airways
Deal found 2/20$452
This Iberia deal was found by Cheapflights users on 2/20. 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.
Tue 4/16:45 amBSL - ORD
2 stops17h 48mMultiple Airlines
Sun 4/69:15 pmORD - BSL
1 stop18h 35mMultiple Airlines
Deal found 2/20$457
This Expedia deal was found by Cheapflights users on 2/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/86:50 amBSL - STL
2 stops18h 09mMultiple Airlines
Wed 3/122:02 pmSTL - BSL
2 stops22h 38mMultiple Airlines
Deal found 2/20$518
This KLM deal was found by Cheapflights users on 2/20. 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.
Tue 4/110:15 amBSL - ORD
2 stops15h 06mKLM
Tue 4/81:26 pmORD - BSL
2 stops13h 09mKLM
Deal found 2/20$521
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Thu 3/139:35 amBSL - ORD
2 stops16h 02mUnited Airlines
Wed 3/267:00 pmORD - BSL
1 stop15h 20mUnited Airlines
Deal found 2/20$534
This American Airlines deal was found by Cheapflights users on 2/20. 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.
Sat 3/86:50 amBSL - STL
2 stops19h 39mAmerican Airlines
Wed 3/126:32 pmSTL - BSL
2 stops18h 08mAmerican Airlines
Deal found 2/20$543
This Delta deal was found by Cheapflights users on 2/20. 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.
Thu 3/1311:15 amBSL - ORD
2 stops15h 29mDelta
Wed 3/262:40 pmORD - BSL
2 stops14h 00mDelta
Deal found 2/20$559
This Austrian Airlines deal was found by Cheapflights users on 2/20. 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.
Thu 3/2010:10 amBSL - ORD
1 stop34h 55mAustrian Airlines
Thu 3/276:50 pmORD - BSL
2 stops18h 55mAustrian Airlines
Deal found 2/20$565
This Lufthansa deal was found by Cheapflights users on 2/20. 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.
Thu 7/36:30 pmBSL - ORD
1 stop23h 30mLufthansa
Thu 7/103:10 pmORD - BSL
1 stop15h 30mLufthansa
Deal found 2/20$615
This Delta deal was found by Cheapflights users on 2/20. 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.
Thu 6/196:15 amBSL - MDW
2 stops18h 48mDelta
Thu 7/311:00 pmMDW - BSL
2 stops17h 50mDelta
Deal found 2/20$763
This Air France deal was found by Cheapflights users on 2/20. 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.
Thu 10/3010:15 amBSL - MDW
2 stops17h 32mAir France
Mon 11/35:59 pmMDW - BSL
2 stops13h 06mAir France
Deal found 2/20$773

Find flights from Basel to Illinois within your budget

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 February 20, 2025.

Fly from

Basel

Fly to

Illinois

Route

Depart

Return

Price

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Tue 4/1

6:45 am-2:45 pm

1 stop15h 00m

Chicago O'Hare Intl

Mon 4/7

8:20 pm-10:50 pm

1 stop19h 30m

$450

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Thu 3/13

11:15 am-5:40 pm

1 stop12h 25m

Chicago O'Hare Intl

Wed 3/26

7:30 pm-2:50 pm

1 stop13h 20m

$452

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Tue 4/1

6:45 am-5:33 pm

2 stops17h 48m

Chicago O'Hare Intl

Sun 4/6

9:15 pm-10:50 pm

1 stop18h 35m

$457

BaselSt. Louis

BSL - STL

BSLSTL

Basel EuroAirport Swiss

Sat 3/8

6:50 am-5:59 pm

2 stops18h 09m

Lambert-St Louis

Wed 3/12

2:02 pm-6:40 pm

2 stops22h 38m

$518

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Tue 4/1

10:15 am-6:21 pm

2 stops15h 06m

Chicago O'Hare Intl

Tue 4/8

1:26 pm-9:35 am

2 stops13h 09m

$521

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Thu 3/13

9:35 am-7:37 pm

2 stops16h 02m

Chicago O'Hare Intl

Wed 3/26

7:00 pm-4:20 pm

1 stop15h 20m

$534

BaselSt. Louis

BSL - STL

BSLSTL

Basel EuroAirport Swiss

Sat 3/8

6:50 am-7:29 pm

2 stops19h 39m

Lambert-St Louis

Wed 3/12

6:32 pm-6:40 pm

2 stops18h 08m

$543

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Thu 3/13

11:15 am-8:44 pm

2 stops15h 29m

Chicago O'Hare Intl

Wed 3/26

2:40 pm-10:40 am

2 stops14h 00m

$559

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Thu 3/20

10:10 am-3:05 pm

1 stop34h 55m

Chicago O'Hare Intl

Thu 3/27

6:50 pm-7:45 pm

2 stops18h 55m

$565

BaselChicago

BSL - ORD

BSLORD

Basel EuroAirport Swiss

Thu 7/3

6:30 pm-11:00 am

1 stop23h 30m

Chicago O'Hare Intl

Thu 7/10

3:10 pm-1:40 pm

1 stop15h 30m

$615

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 17 results
1
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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.

Travel insights for flights from Basel to Illinois

Get recent, data-driven insights about flights from Basel to Illinois including ideal travel times, pricing trends, and more.

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 February 20, 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
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
8,219 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Austrian Airlines
7.6
Good
773 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,765 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,219 reviews

Crew

8.5

Overall

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Comfort

8.0

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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?

    $538 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 KLM and United Airlines, with prices starting from $1,509 and $1,767, 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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