HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Billings

$133+ Cheap flights from Illinois to Billings (BIL)

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 1/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BIL
ene. 14 — ene. 211
mié. 1/14
mié. 1/21
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Billings with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Illinois to Billings

Cheapest flights from Illinois to Billings
Explore the most affordable flight options available from Illinois to Billings. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 15, 2025.

This United Airlines deal was found by Cheapflights users on 12/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/241:55 pmORD - BIL
1 stop8h 29mUnited Airlines
vie. 12/265:50 pmBIL - ORD
1 stop5h 09mUnited Airlines
Deal found 12/14$399
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/241:08 pmPIA - BIL
2 stops24h 20mMultiple Airlines
dom. 1/47:55 pmBIL - PIA
1 stop14h 35mMultiple Airlines
Deal found 12/15$496
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/241:08 pmPIA - BIL
2 stops24h 20mMultiple Airlines
sáb. 1/35:45 pmBIL - PIA
1 stop16h 15mMultiple Airlines
Deal found 12/15$497
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/246:53 pmPIA - BIL
1 stop18h 35mAllegiant Air
dom. 1/47:55 pmBIL - PIA
1 stop14h 35mAllegiant Air
Deal found 12/15$504
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/246:53 pmPIA - BIL
1 stop18h 35mAllegiant Air
sáb. 1/35:45 pmBIL - PIA
1 stop16h 15mAllegiant Air
Deal found 12/15$505
This United Airlines deal was found by Cheapflights users on 12/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/188:45 amMLI - BIL
1 stop5h 39mUnited Airlines
sáb. 12/202:40 pmBIL - MLI
1 stop5h 17mUnited Airlines
Deal found 12/14$509
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/258:35 amPIA - BIL
1 stop5h 49mUnited Airlines
mié. 12/316:35 amBIL - PIA
1 stop13h 12mUnited Airlines
Deal found 12/15$533
This United Airlines deal was found by Cheapflights users on 12/12. 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.
sáb. 12/132:40 pmORD - BIL
1 stop7h 41mUnited Airlines
sáb. 12/202:40 pmBIL - ORD
1 stop5h 39mUnited Airlines
Deal found 12/12$534
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/258:35 amPIA - BIL
1 stop5h 49mUnited Airlines
mar. 12/306:35 amBIL - PIA
2 stops28h 45mUnited Airlines
Deal found 12/15$538
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/241:20 pmPIA - BIL
2 stops9h 04mUnited Airlines
mié. 12/316:35 amBIL - PIA
1 stop13h 12mUnited Airlines
Deal found 12/15$548
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/258:35 amPIA - BIL
1 stop5h 49mUnited Airlines
jue. 1/15:50 pmBIL - PIA
2 stops17h 30mUnited Airlines
Deal found 12/15$568
This United Airlines deal was found by Cheapflights users on 12/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/258:35 amPIA - BIL
1 stop5h 49mUnited Airlines
lun. 12/292:40 pmBIL - PIA
1 stop5h 07mUnited Airlines
Deal found 12/15$585

Find flight deals from Illinois to Billings

Keep the following information in mind while searching for Illinois to Billings flight deals. Data was last updated diciembre 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$216
(Kiwi.com)

One-way from

$133
(Kiwi.com)

Popular in

March

Cheapest in

October

Average price

$413
Provider with most accurate pricing for Chicago (CHI)-Billings Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Billings Logan Intl flights.
Search Deals
From Illinois to Billings Logan Intl
Search Deals
One-way flight from Illinois to Billings Logan Intl
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($87 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Billings 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 diciembre 15, 2025.
Use the filters below to find and compare flights from Illinois to Billings that are best for you.

Fly from

Illinois

Fly to

Billings

Route

Depart

Return

Price

ChicagoBillings

MDW - BIL

MDWBIL

Chicago Midway

jue. 1/8

12:50 pm-11:30 am

1 stop23h 40m

Billings Logan Intl

mié. 1/14

11:20 am-11:47 am

1 stop23h 27m

$216

ChicagoBillings

MDW - BIL

MDWBIL

Chicago Midway

mié. 1/21

1:49 pm-7:24 pm

1 stop6h 35m

Billings Logan Intl

mar. 1/27

6:10 am-1:09 pm

1 stop5h 59m

$249

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

vie. 2/6

1:55 pm-9:23 pm

1 stop8h 28m

Billings Logan Intl

mar. 2/10

2:45 pm-9:15 pm

1 stop5h 30m

$249

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

vie. 3/6

3:59 pm-7:39 pm

1 stop4h 40m

Billings Logan Intl

mié. 3/11

5:15 am-12:23 pm

1 stop6h 08m

$249

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

dom. 1/11

12:30 pm-7:25 pm

1 stop7h 55m

Billings Logan Intl

dom. 1/18

6:22 am-11:47 am

1 stop4h 25m

$249

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

jue. 1/8

7:05 am-7:25 pm

2 stops13h 20m

Billings Logan Intl

mié. 1/14

5:15 am-1:38 pm

1 stop7h 23m

$279

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

sáb. 2/21

2:40 pm-9:21 pm

1 stop7h 41m

Billings Logan Intl

jue. 2/26

5:53 pm-11:59 pm

1 stop5h 06m

$280

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

mié. 1/14

11:20 am-9:23 pm

2 stops11h 03m

Billings Logan Intl

mar. 1/20

2:45 pm-8:58 pm

1 stop5h 13m

$309

ChicagoBillings

MDW - BIL

MDWBIL

Chicago Midway

sáb. 1/17

1:28 pm-7:25 pm

2 stops6h 57m

Billings Logan Intl

mié. 1/21

6:10 am-1:09 pm

1 stop5h 59m

$309

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

jue. 1/8

3:35 pm-11:36 pm

1 stop9h 01m

Billings Logan Intl

mié. 1/14

3:35 pm-11:50 pm

1 stop7h 15m

$315

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/13

Showing 1-10 of 34 results
1
2
3
4

Best time to book a flight from Illinois to Billings

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

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

Find hourly flight availability from Illinois to Billings. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 15, 2025.

It’s typically best to fly out from Illinois to Billings in the evening. Doing so could potentially save you 38% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

Related info for your journey

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

    Located just 2.7 mi from the city center, Billings Logan Intl (BIL) is the airport most travelers will use when flying to Billings from Illinois.

  • How long is the flight from Illinois to Billings?

    Departing from Illinois to Billings will take you 6h 35m. Illinois and Billings are separated by a distance of 1070 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    While some choose either Lambert-St Louis - Billings Logan Intl or Chicago Midway - Billings Logan Intl, Chicago O'Hare Intl - Billings Logan Intl is the most popular route from Illinois to Billings.

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

    Consider Qatar Airways (100%), American Airlines (96%) or Envoy Air (96%) when booking your flight. These represent the most reliable airlines when flying from Illinois to Billings.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Illinois to Billings 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Billings

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Bozeman flights
John F Kennedy Intl to Bozeman flights
O'Hare Intl to Bozeman flights
LaGuardia to Bozeman flights
Boston to Bozeman flights
Los Angeles to Bozeman flights
Seattle to Bozeman flights
San Francisco to Bozeman flights
Denver to Bozeman flights
Atlanta to Bozeman flights
Minneapolis to Bozeman flights
Dallas/Fort Worth to Bozeman flights
Dallas/Fort Worth to Kalispell flights
Dulles Intl to Bozeman flights
Baltimore to Bozeman flights
Reagan-National to Bozeman flights
Hobby to Bozeman flights
Philadelphia to Bozeman flights
Seattle to Billings flights
George Bush Intcntl to Bozeman flights
Charlotte to Bozeman flights
Fort Lauderdale to Bozeman flights
Minneapolis to Kalispell flights
John F Kennedy Intl to Kalispell flights
Dallas/Fort Worth to Missoula flights
San Francisco to Kalispell flights
Midway to Bozeman flights
Seattle to Kalispell flights
Seattle to Missoula flights
O'Hare Intl to Kalispell flights
Ontario to Bozeman flights
Pittsburgh to Bozeman flights
Hobby to Kalispell flights
Austin to Bozeman flights
Boston to Kalispell flights
Atlanta to Kalispell flights
Nashville to Bozeman flights
Santa Ana to Bozeman flights
Sky Harbor Intl to Bozeman flights
Denver to Missoula flights
Newark to Kalispell flights
West Palm Beach to Bozeman flights
San Diego to Bozeman flights
Dallas/Fort Worth to Billings flights
Detroit to Bozeman flights
Grand Rapids to Bozeman flights
Orlando to Bozeman flights
Cincinnati to Bozeman flights
Tampa to Bozeman flights
Dulles Intl to Kalispell flights

Top 2 airlines flying from Illinois to Billings

Discover the top 2 airlines that operate flights from Illinois to Billings. 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 diciembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$225Average$420FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$269Average$568FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.