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$100+ Cheap flights from Billings (BIL) to Illinois

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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ORD
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Cheap flight deals from Billings to Illinois

Keep the following information in mind while searching for Billings to Illinois flight deals. Data was last updated October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$291
(Delta)

One-way from

$100
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$278

Good round-trip deal

$457 or less

Good one-way deal

$290 or less
Provider with most accurate pricing for Billings Logan Intl-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Billings Logan Intl-Chicago (CHI) flights.
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From Billings Logan Intl to Illinois
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One-way flight from Billings Logan Intl to Illinois
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Highest demand for flights based on searches. 21% potential increase in price ($110 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Billings Logan Intl to Illinois.
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Price to beat on a one-way flight from Billings Logan Intl to Illinois.
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Find flight deals from Billings to Illinois

Cheapest flights from Billings to Illinois
Explore the most affordable flight options available from Billings to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/245:21 pmBIL - ORD
1 stop25h 18mMultiple Airlines
Mon 12/19:22 pmORD - BIL
2 stops38h 55mMultiple Airlines
Deal found 10/27$304
This Delta deal was found by Cheapflights users on 10/28. 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.
Wed 12/106:22 pmBIL - STL
1 stop5h 39mDelta
Tue 12/166:30 amSTL - BIL
1 stop5h 37mDelta
Deal found 10/28$333
This Delta deal was found by Cheapflights users on 10/28. 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.
Wed 12/105:14 amBIL - STL
2 stops10h 56mDelta
Wed 12/176:15 amSTL - BIL
1 stop5h 52mDelta
Deal found 10/28$338
This Delta deal was found by Cheapflights users on 10/28. 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 12/116:25 amBIL - STL
2 stops9h 45mDelta
Mon 12/155:34 pmSTL - BIL
1 stop7h 14mDelta
Deal found 10/28$357
This Delta deal was found by Cheapflights users on 10/28. 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 12/1111:47 amBIL - STL
2 stops8h 15mDelta
Tue 12/1612:49 pmSTL - BIL
2 stops12h 34mDelta
Deal found 10/28$362
This Delta deal was found by Cheapflights users on 10/28. 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 11/275:18 amBIL - ORD
1 stop7h 26mDelta
Thu 12/48:55 amORD - BIL
2 stops9h 47mDelta
Deal found 10/28$370
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Thu 11/277:00 amBIL - ORD
1 stop7h 19mAmerican Airlines
Thu 12/45:18 amORD - BIL
1 stop9h 10mAmerican Airlines
Deal found 10/28$381
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/312:02 pmBIL - ORD
1 stop16h 30mMultiple Airlines
Mon 12/19:22 pmORD - BIL
2 stops38h 55mMultiple Airlines
Deal found 10/27$384
This Kiwi.com deal was found by Cheapflights users on 10/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/101:00 pmBIL - STL
2 stops19h 07mMultiple Airlines
Thu 11/132:42 pmSTL - BIL
1 stop19h 33mMultiple Airlines
Deal found 10/28$391
This Alaska Airlines deal was found by Cheapflights users on 10/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/122:02 pmBIL - STL
1 stop8h 57mAlaska Airlines
Mon 12/153:23 pmSTL - BIL
2 stops22h 59mAlaska Airlines
Deal found 10/27$396
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1210:02 amBIL - STL
1 stop10h 46mMultiple Airlines
Wed 12/173:30 pmSTL - BIL
2 stops42h 42mMultiple Airlines
Deal found 10/27$410
This Delta deal was found by Cheapflights users on 10/28. 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.
Fri 12/126:25 amBIL - STL
2 stops9h 45mDelta
Wed 12/176:15 amSTL - BIL
1 stop5h 52mDelta
Deal found 10/28$425

Cheapflights Fare Finder

 
Customize your flight search to find flights from Billings 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 October 29, 2025.
Use the filters below to find and compare flights from Billings to Illinois that are best for you.

Fly from

Billings

Fly to

Illinois

Route

Depart

Return

Price

BillingsChicago

BIL - MDW

BILMDW

Billings Logan Intl

Thu 2/26

6:15 am-1:08 pm

1 stop5h 53m

Chicago Midway

Mon 3/2

6:45 pm-10:50 pm

1 stop5h 05m

$291

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Thu 1/15

2:45 pm-11:59 pm

1 stop8h 14m

Chicago O'Hare Intl

Tue 1/20

3:59 pm-9:23 pm

1 stop6h 24m

$291

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Fri 2/13

5:40 am-12:26 pm

1 stop5h 46m

Chicago O'Hare Intl

Mon 2/16

7:00 pm-10:50 pm

1 stop4h 50m

$291

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Thu 2/26

6:15 am-11:33 am

1 stop4h 18m

Chicago O'Hare Intl

Mon 3/2

7:00 pm-10:50 pm

1 stop4h 50m

$291

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Wed 12/10

6:22 pm-1:01 am

1 stop5h 39m

Lambert-St Louis

Wed 12/17

5:34 pm-11:48 pm

1 stop7h 14m

$333

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Tue 4/7

11:35 am-5:59 pm

1 stop5h 24m

Lambert-St Louis

Wed 4/8

3:50 pm-10:50 pm

1 stop8h 00m

$333

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Thu 12/11

5:14 am-1:30 pm

1 stop7h 16m

Lambert-St Louis

Tue 12/16

6:30 am-11:07 am

1 stop5h 37m

$333

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Sun 12/14

5:14 am-1:30 pm

1 stop7h 16m

Lambert-St Louis

Thu 12/18

5:34 pm-11:48 pm

1 stop7h 14m

$333

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Thu 12/11

6:22 pm-12:48 am

1 stop5h 26m

Lambert-St Louis

Mon 12/15

5:34 pm-11:48 pm

1 stop7h 14m

$333

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Fri 12/12

6:22 pm-12:48 am

1 stop5h 26m

Lambert-St Louis

Tue 12/16

5:34 pm-11:48 pm

1 stop7h 14m

$333

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 30 results
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Best time to book a flight from Billings to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Billings 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 Billings to Illinois

What is the cheapest month to book a flight from Billings to Illinois?

Currently, September is the cheapest month in which you can book a flight from Billings to Illinois (average of $217). Flying from Billings to Illinois in February is currently the most expensive (average of $597). 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.

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

Find hourly flight availability from Billings to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

When flying from Billings to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Billings to Illinois?

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 October 29, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Billings to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,992 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,992 reviews
Delta
7.9
Good
7,992 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,999 reviews
Delta
7.9
Good
7,992 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,032 reviews
Delta
7.9
Good
7,992 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

7.9

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

Related info for your journey

Find useful and relevant information for your journey from Billings 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 Billings to Illinois?

    Billings Logan Intl (BIL) is the airport you will fly out of if you book a flight from Billings to Illinois. It is only a 2.7 mi journey to Billings Logan Intl (BIL) from Billings’s city center.

  • How long is the flight from Billings to Illinois?

    Airlines like Delta and United Airlines fly from Billings to Illinois in about 5h 53m. The time it takes to get you to your destination can typically vary by up to 2h 21m. The distance from Billings to Illinois is about 1070 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from Billings to Illinois?

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

  • What are the most reliable airlines from Billings to Illinois?

    The top 3 most reliable airlines when flying from Billings to Illinois are American Airlines (85%), Envoy Air (85%) and SkyWest Airlines (80%).

  • What are the cheapest flights from Billings to Illinois?

    The cheapest flight price from Billings to Illinois is $186. On average you can expect to pay $445. The most popular route, (Billings Logan Intl - Chicago O'Hare Intl), can usually be booked for $291.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Billings 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 Billings to Illinois?

    Currently, September is the cheapest month in which you can book a flight from Billings to Illinois (average of $217). Flying from Billings to Illinois in February is currently the most expensive (average of $597). 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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Top 3 airlines flying from Billings to Illinois

Discover the top 3 airlines that operate flights from Billings to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$225Average$371FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$239Average$413FlexibilityNo cancel feeOn-time69%
DeltaCheapest$248Average$500FlexibilityNo cancel feeOn-timeN/A

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