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$120+ 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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ORD
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$210
(American Airlines)

One-way from

$120
(Delta)

Popular in

December

Cheapest in

October

Average price

$365

Good round-trip deal

$334 or less

Good one-way deal

$220 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. 38% potential increase in price ($261 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This American Airlines deal was found by Cheapflights users on 7/29. 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 10/212:19 pmBIL - ORD
Nonstop2h 54mAmerican Airlines
Tue 10/79:40 amORD - BIL
Nonstop3h 10mAmerican Airlines
Deal found 7/29$210
This Delta deal was found by Cheapflights users on 7/29. 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 9/175:25 amBIL - ORD
1 stop5h 28mDelta
Sat 9/203:58 pmORD - BIL
1 stop4h 46mDelta
Deal found 7/29$233
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Fri 8/295:57 pmBIL - ORD
1 stop5h 02mUnited Airlines
Tue 9/28:55 amORD - BIL
Nonstop3h 21mUnited Airlines
Deal found 7/30$239
This Delta deal was found by Cheapflights users on 7/29. 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.
Sat 9/136:25 amBIL - MDW
1 stop5h 38mDelta
Sat 9/201:43 pmMDW - BIL
1 stop7h 01mDelta
Deal found 7/29$249
This American Airlines deal was found by Cheapflights users on 7/30. 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 9/3012:19 pmBIL - MLI
1 stop6h 58mAmerican Airlines
Sat 10/46:30 amMLI - BIL
1 stop7h 59mAmerican Airlines
Deal found 7/30$274
This American Airlines deal was found by Cheapflights users on 7/29. 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 8/265:49 amBIL - STL
1 stop14h 01mAmerican Airlines
Sun 8/316:00 amSTL - BIL
1 stop6h 49mAmerican Airlines
Deal found 7/29$311
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Tue 8/267:00 amBIL - STL
1 stop4h 43mUnited Airlines
Sun 8/3112:35 pmSTL - BIL
2 stops10h 24mUnited Airlines
Deal found 7/29$318
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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.
Wed 9/242:04 pmBIL - ORD
1 stop7h 03mAlaska Airlines
Fri 9/265:45 pmORD - BIL
1 stop7h 26mAlaska Airlines
Deal found 7/29$324
This Mytrip deal was found by Cheapflights users on 7/30. 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.
Fri 8/294:25 pmBIL - ORD
1 stop11h 25mMultiple Airlines
Sun 8/3110:27 amORD - BIL
2 stops25h 17mMultiple Airlines
Deal found 7/30$342
This Hawaiian Airlines deal was found by Cheapflights users on 7/30. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/57:15 pmBIL - ORD
1 stop10h 09mHawaiian Airlines
Tue 10/73:15 pmORD - BIL
1 stop9h 53mHawaiian Airlines
Deal found 7/30$362
This United Airlines deal was found by Cheapflights users on 7/30. 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.
Tue 9/3010:39 amBIL - MLI
2 stops11h 04mUnited Airlines
Sat 10/46:30 amMLI - BIL
1 stop5h 46mUnited Airlines
Deal found 7/30$374
This Delta deal was found by Cheapflights users on 7/30. 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.
Sun 9/145:25 amBIL - STL
1 stop7h 08mDelta
Wed 9/175:32 pmSTL - BIL
1 stop6h 38mDelta
Deal found 7/30$376

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 July 31, 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

Thu 10/2

12:19 pm-4:13 pm

Nonstop2h 54m

Chicago O'Hare Intl

Tue 10/7

9:40 am-11:50 am

Nonstop3h 10m

$210

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Wed 9/17

5:25 am-11:53 am

1 stop5h 28m

Chicago O'Hare Intl

Sat 9/20

3:58 pm-7:44 pm

1 stop4h 46m

$233

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Fri 8/29

5:57 pm-11:59 pm

1 stop5h 02m

Chicago O'Hare Intl

Tue 9/2

8:55 am-11:16 am

Nonstop3h 21m

$239

BillingsChicago

BIL - MDW

BILMDW

Billings Logan Intl

Sat 9/13

6:25 am-1:03 pm

1 stop5h 38m

Chicago Midway

Sat 9/20

1:43 pm-7:44 pm

1 stop7h 01m

$249

BillingsMoline

BIL - MLI

BILMLI

Billings Logan Intl

Tue 9/30

12:19 pm-8:17 pm

1 stop6h 58m

Moline Quad-City

Sat 10/4

6:30 am-1:29 pm

1 stop7h 59m

$274

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Tue 8/26

5:49 am-8:50 pm

1 stop14h 01m

Lambert-St Louis

Sun 8/31

6:00 am-11:49 am

1 stop6h 49m

$311

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Tue 8/26

7:00 am-12:43 pm

1 stop4h 43m

Lambert-St Louis

Sun 8/31

12:35 pm-9:59 pm

2 stops10h 24m

$318

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Wed 9/24

2:04 pm-10:07 pm

1 stop7h 03m

Chicago O'Hare Intl

Fri 9/26

5:45 pm-12:11 am

1 stop7h 26m

$324

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Fri 8/29

4:25 pm-4:50 am

1 stop11h 25m

Chicago O'Hare Intl

Sun 8/31

10:27 am-10:44 am

2 stops25h 17m

$342

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Sun 10/5

7:15 pm-6:24 am

1 stop10h 09m

Chicago O'Hare Intl

Tue 10/7

3:15 pm-12:08 am

1 stop9h 53m

$362

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 26 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, 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 July 31, 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 July 31, 2025.

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

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 July 31, 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

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,610 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,902 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 Delta, with whom users have recently found tickets for as low as $120. However, be on the lookout for offers from American Airlines and United 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 most reliable airlines from Billings to Illinois?

    The top 3 most reliable airlines when flying from Billings to Illinois are SkyWest Airlines (78%), United Airlines (78%) and Qatar Airways (76%).

  • What are the cheapest flights from Billings to Illinois?

    The cheapest flight price from Billings to Illinois is $179. On average you can expect to pay $430. The most popular route, (Billings Logan Intl - Chicago O'Hare Intl), can usually be booked for $233.

  • 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$225Average$411FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$239Average$542FlexibilityNo cancel feeOn-time69%
DeltaCheapest$314Average$380FlexibilityNo cancel feeOn-timeN/A

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