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$127+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ORD
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$191
(American Airlines)

One-way from

$127
(Alaska Airlines)

Popular in

December

Cheapest in

August

Average price

$355

Good round-trip deal

$370 or less

Good one-way deal

$195 or less
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. 35% potential increase in price ($245 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/11. 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.
jue. 8/1412:19 pmBIL - ORD
Nonstop2h 52mAmerican Airlines
lun. 8/189:45 amORD - BIL
Nonstop3h 04mAmerican Airlines
Deal found 6/11$191
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/2510:26 pmBIL - ORD
1 stop19h 18mMultiple Airlines
lun. 7/287:08 amORD - BIL
1 stop15h 28mMultiple Airlines
Deal found 6/10$218
This United Airlines deal was found by Cheapflights users on 6/10. 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.
vie. 8/151:49 pmBIL - ORD
1 stop7h 50mUnited Airlines
mié. 8/208:55 amORD - BIL
Nonstop3h 21mUnited Airlines
Deal found 6/10$220
This Delta deal was found by Cheapflights users on 6/11. 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.
vie. 7/115:20 amBIL - ORD
1 stop5h 33mDelta
vie. 7/182:00 pmORD - BIL
2 stops11h 07mDelta
Deal found 6/11$279
This Delta deal was found by Cheapflights users on 6/10. 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.
mié. 8/136:08 pmBIL - STL
1 stop5h 30mDelta
vie. 8/155:30 pmSTL - BIL
1 stop6h 40mDelta
Deal found 6/10$313
This American Airlines deal was found by Cheapflights users on 6/10. 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.
jue. 9/46:00 amBIL - STL
1 stop6h 23mAmerican Airlines
jue. 9/119:56 amSTL - BIL
1 stop13h 43mAmerican Airlines
Deal found 6/10$314
This Delta deal was found by Cheapflights users on 6/10. 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.
vie. 8/296:25 amBIL - MDW
1 stop5h 38mDelta
sáb. 8/307:17 pmMDW - BIL
1 stop4h 55mDelta
Deal found 6/10$324
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
jue. 10/27:18 pmBIL - ORD
1 stop25h 46mAlaska Airlines
mar. 10/76:00 amORD - BIL
1 stop19h 08mAlaska Airlines
Deal found 6/10$328
This United Airlines deal was found by Cheapflights users on 6/10. 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. 8/132:35 pmBIL - STL
1 stop6h 15mUnited Airlines
vie. 8/1510:00 amSTL - BIL
2 stops8h 14mUnited Airlines
Deal found 6/10$472
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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.
jue. 9/46:00 amBIL - STL
1 stop7h 39mAlaska Airlines
jue. 9/113:35 pmSTL - BIL
2 stops22h 49mAlaska Airlines
Deal found 6/10$505
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 6/256:39 pmBIL - STL
2 stops21h 25mMultiple Airlines
dom. 6/296:12 amSTL - BIL
2 stops40h 22mMultiple Airlines
Deal found 6/10$534

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 junio 12, 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 - ORD

BILORD

Billings Logan Intl

jue. 8/14

12:19 pm-4:11 pm

Nonstop2h 52m

Chicago O'Hare Intl

lun. 8/18

9:45 am-11:49 am

Nonstop3h 04m

$191

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

vie. 7/25

10:26 pm-6:44 pm

1 stop19h 18m

Chicago O'Hare Intl

lun. 7/28

7:08 am-9:36 pm

1 stop15h 28m

$218

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

vie. 8/15

1:49 pm-10:39 pm

1 stop7h 50m

Chicago O'Hare Intl

mié. 8/20

8:55 am-11:16 am

Nonstop3h 21m

$220

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

vie. 7/11

5:20 am-11:53 am

1 stop5h 33m

Chicago O'Hare Intl

vie. 7/18

2:00 pm-12:07 am

2 stops11h 07m

$279

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

mié. 8/13

6:08 pm-12:38 am

1 stop5h 30m

Lambert-St Louis

vie. 8/15

5:30 pm-11:10 pm

1 stop6h 40m

$313

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

jue. 9/4

6:00 am-1:23 pm

1 stop6h 23m

Lambert-St Louis

jue. 9/11

9:56 am-10:39 pm

1 stop13h 43m

$314

BillingsChicago

BIL - MDW

BILMDW

Billings Logan Intl

vie. 8/29

6:25 am-1:03 pm

1 stop5h 38m

Chicago Midway

sáb. 8/30

7:17 pm-11:12 pm

1 stop4h 55m

$324

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

jue. 10/2

7:18 pm-10:04 pm

1 stop25h 46m

Chicago O'Hare Intl

mar. 10/7

6:00 am-12:08 am

1 stop19h 08m

$328

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

mié. 8/13

2:35 pm-9:50 pm

1 stop6h 15m

Lambert-St Louis

vie. 8/15

10:00 am-5:14 pm

2 stops8h 14m

$472

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

jue. 9/4

6:00 am-2:39 pm

1 stop7h 39m

Lambert-St Louis

jue. 9/11

3:35 pm-1:24 pm

2 stops22h 49m

$505

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 20 results
1
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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, August is the cheapest month in which you can book a flight from Billings to Illinois (average of $245). Flying from Billings 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.

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 junio 12, 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.

Weekly flight availability from Billings to Illinois

Explore weekly flight availability from Billings to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated junio 12, 2025.

The most flights from BIL to USIL are scheduled on a Monday (5 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (3 on average).

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 junio 12, 2025.
See what other customers who have flown with Alaska Airlines, Delta and Hawaiian 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What are the cheapest airlines to fly from Billings to Illinois one-way?

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $127. However, be on the lookout for offers from Delta and American Airlines, as they are both options that can get you from Billings to Illinois for a low price.

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

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

  • What are the cheapest flights from Billings to Illinois?

    The cheapest flight price from Billings to Illinois is $175. On average you can expect to pay $665. The most popular route, (Billings Logan Intl - Chicago O'Hare Intl), can usually be booked for $220.

  • 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, August is the cheapest month in which you can book a flight from Billings to Illinois (average of $245). Flying from Billings 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 Billings to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$225Average$467FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$239Average$595FlexibilityNo cancel feeOn-time69%
DeltaCheapest$314Average$384FlexibilityNo cancel feeOn-timeN/A

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