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$145+ 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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ORD
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
1 adult, Economy
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Cheap 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 March 22, 2026.

This Delta deal was found by Cheapflights users on 3/20. 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.
Sat 5/96:30 am
BIL
-
MDW
1 stop5h 49m
Delta
Wed 5/137:13 pm
MDW
-
BIL
1 stop5h 01m
Delta
Deal found 3/20$271
This United Airlines deal was found by Cheapflights users on 3/19. 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 6/26:00 pm
BIL
-
ORD
1 stop5h 44m
United Airlines
Sat 6/65:00 am
ORD
-
BIL
1 stop5h 35m
United Airlines
Deal found 3/19$271
This Delta deal was found by Cheapflights users on 3/18. 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 5/95:30 am
BIL
-
ORD
1 stop5h 22m
Delta
Wed 5/1311:09 am
ORD
-
BIL
2 stops12h 43m
Delta
Deal found 3/18$276
This Delta deal was found by Cheapflights users on 3/17. 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 5/96:30 am
BIL
-
MDW
1 stop5h 49m
Delta
Mon 5/117:13 pm
MDW
-
BIL
1 stop5h 01m
Delta
Deal found 3/17$290
This United Airlines deal was found by Cheapflights users on 3/17. 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 4/162:35 pm
BIL
-
ORD
1 stop7h 53m
United Airlines
Sat 4/182:30 pm
ORD
-
BIL
1 stop7h 27m
United Airlines
Deal found 3/17$290
This Delta deal was found by Cheapflights users on 3/21. 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 4/266:24 am
BIL
-
ORD
1 stop4h 10m
Delta
Sat 5/21:29 pm
ORD
-
BIL
2 stops7h 37m
Delta
Deal found 3/21$295
This Delta deal was found by Cheapflights users on 3/21. 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 4/186:24 am
BIL
-
ORD
2 stops11h 24m
Delta
Sat 4/251:29 pm
ORD
-
BIL
2 stops9h 55m
Delta
Deal found 3/21$300
This United Airlines deal was found by Cheapflights users on 3/20. 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.
Wed 5/205:51 pm
BIL
-
ORD
1 stop6h 07m
United Airlines
Sun 5/247:52 pm
ORD
-
BIL
Nonstop3h 23m
United Airlines
Deal found 3/20$306
This American Airlines deal was found by Cheapflights users on 3/21. 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 4/181:51 pm
BIL
-
ORD
1 stop7h 09m
American Airlines
Sat 4/254:40 pm
ORD
-
BIL
1 stop7h 03m
American Airlines
Deal found 3/21$309
This Delta deal was found by Cheapflights users on 3/21. 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 4/245:20 am
BIL
-
ORD
1 stop5h 31m
Delta
Mon 4/271:36 pm
ORD
-
BIL
2 stops7h 30m
Delta
Deal found 3/21$314
This Delta deal was found by Cheapflights users on 3/19. 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 4/226:24 am
BIL
-
ORD
2 stops11h 11m
Delta
Sat 4/2511:00 am
ORD
-
BIL
2 stops10h 06m
Delta
Deal found 3/19$315
This Delta deal was found by Cheapflights users on 3/17. 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.
Mon 4/136:18 pm
BIL
-
STL
1 stop5h 07m
Delta
Sat 4/185:00 pm
STL
-
BIL
1 stop6h 24m
Delta
Deal found 3/17$319

Find flight deals from Billings to Illinois

Keep the following information in mind while searching for Billings to Illinois flight deals. Data was last updated March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$271
(Delta)

One-way from

$145
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$333

Good round-trip deal

$445 or less

Good one-way deal

$245 or less
Provider with most accurate pricing for Billings Logan Intl-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Billings Logan Intl-Chicago (CHI) flights.
Search Deals
From Billings Logan Intl to Illinois
Search Deals
One-way flight from Billings Logan Intl to Illinois
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Billings Logan Intl to Illinois.
Search Deals
Price to beat on a one-way flight from Billings Logan Intl to Illinois.
Search Deals

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 March 22, 2026.
Use the filters below to find and compare flights from Billings to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BillingsChicago

BIL - MDW

BILMDW

Billings Logan Intl

Sat 5/9

6:30 am-1:19 pm

1 stop5h 49m

Chicago Midway

Wed 5/13

7:13 pm-11:14 pm

1 stop5h 01m

$271

BillingsChicago

BIL - MDW

BILMDW

Billings Logan Intl

Tue 6/2

6:30 am-1:19 pm

1 stop5h 49m

Chicago Midway

Sat 6/6

7:13 pm-11:14 pm

1 stop5h 01m

$271

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Tue 6/2

5:30 am-11:52 am

1 stop5h 22m

Chicago O'Hare Intl

Sat 6/6

5:41 pm-11:14 pm

1 stop6h 33m

$271

BillingsChicago

BIL - MDW

BILMDW

Billings Logan Intl

Sat 5/9

6:30 am-1:19 pm

1 stop5h 49m

Chicago Midway

Mon 5/11

7:13 pm-11:14 pm

1 stop5h 01m

$290

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Sun 4/26

6:24 am-11:34 am

1 stop4h 10m

Chicago O'Hare Intl

Sat 5/2

1:29 pm-8:06 pm

2 stops7h 37m

$295

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Thu 7/23

6:15 am-11:29 am

1 stop4h 14m

Chicago O'Hare Intl

Mon 7/27

3:50 pm-10:37 pm

1 stop7h 47m

$309

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Wed 4/22

6:24 am-6:35 pm

2 stops11h 11m

Chicago O'Hare Intl

Sat 4/25

11:00 am-8:06 pm

2 stops10h 06m

$315

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Mon 4/13

6:18 pm-12:25 am

1 stop5h 07m

Lambert-St Louis

Sat 4/18

5:00 pm-10:24 pm

1 stop6h 24m

$319

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Thu 5/28

4:10 pm-11:19 pm

1 stop6h 09m

Chicago O'Hare Intl

Sun 5/31

7:52 pm-10:15 pm

Nonstop3h 23m

$324

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Thu 8/27

5:45 am-12:21 pm

1 stop5h 36m

Chicago O'Hare Intl

Mon 8/31

5:20 pm-10:37 pm

1 stop6h 17m

$334

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Showing 1-10 of 47 resultsSorted by cheapest first
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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 December is currently the most expensive (average of $347). 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.

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 March 22, 2026.
See what other customers who have flown with Delta,United Airlines, andAmerican 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
8,314 reviews

Overall

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,314 reviews
Delta
7.9
Good
8,314 reviews

Overall

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,455 reviews
Delta
7.9
Good
8,314 reviews

Overall

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,489 reviews
Delta
7.9
Good
8,314 reviews

Overall

7.9

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 44m. The time it takes to get you to your destination can typically vary by up to 05m. The distance from Billings to Illinois is about 1057 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 - 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 $235. On average you can expect to pay $549. The most popular route, (Billings Logan Intl - Chicago O'Hare Intl), can usually be booked for $271.

  • 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 December is currently the most expensive (average of $347). 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

Browse thousands of different options on Cheapflights for your next trip

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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 March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$210Average$365FlexibilityNo cancel feeOn-time71%
DeltaCheapest$230Average$498FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$239Average$397FlexibilityNo cancel feeOn-time69%

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