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$149+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ORD
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$219
(United Airlines)

One-way from

$149
(American Airlines)

Popular in

December

Cheapest in

May

Average price

$346

Good round-trip deal

$458 or less

Good one-way deal

$216 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. 25% potential increase in price ($174 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 26, 2025.

This United Airlines deal was found by Cheapflights users on 3/25. 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 8/1212:50 pmBIL - ORD
Nonstop2h 55mUnited Airlines
Fri 8/225:52 pmORD - BIL
1 stop5h 47mUnited Airlines
Deal found 3/25$219
This Delta deal was found by Cheapflights users on 3/25. 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 4/105:20 amBIL - ORD
1 stop6h 18mDelta
Mon 4/145:05 pmORD - BIL
2 stops7h 07mDelta
Deal found 3/25$264
This United Airlines deal was found by Cheapflights users on 3/25. 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 4/92:30 pmBIL - MLI
1 stop5h 33mUnited Airlines
Sun 4/138:55 amMLI - BIL
1 stop5h 23mUnited Airlines
Deal found 3/25$289
This American Airlines deal was found by Cheapflights users on 3/25. 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.
Fri 6/66:00 amBIL - ORD
Nonstop2h 54mAmerican Airlines
Sat 6/79:55 amORD - BIL
Nonstop3h 06mAmerican Airlines
Deal found 3/25$289
This Delta deal was found by Cheapflights users on 3/24. 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 5/195:20 amBIL - STL
1 stop7h 14mDelta
Fri 5/236:05 pmSTL - BIL
2 stops7h 14mDelta
Deal found 3/24$318
This Mytrip deal was found by Cheapflights users on 3/25. 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 5/92:50 pmBIL - ORD
1 stop13h 35mMultiple Airlines
Sun 5/189:02 pmORD - BIL
1 stop25h 29mMultiple Airlines
Deal found 3/25$350
This Alaska Airlines deal was found by Cheapflights users on 3/25. 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.
Sat 8/306:00 amBIL - ORD
2 stops16h 50mAlaska Airlines
Tue 9/93:15 pmORD - BIL
1 stop9h 56mAlaska Airlines
Deal found 3/25$431
This Delta deal was found by Cheapflights users on 3/24. 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 7/236:25 amBIL - MDW
1 stop5h 37mDelta
Sun 7/271:00 pmMDW - BIL
2 stops10h 38mDelta
Deal found 3/24$456
This Hawaiian Airlines deal was found by Cheapflights users on 3/25. 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.
Wed 4/237:45 amBIL - ORD
1 stop9h 16mHawaiian Airlines
Mon 4/283:44 pmORD - BIL
1 stop9h 15mHawaiian Airlines
Deal found 3/25$717

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 26, 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

Tue 8/12

12:50 pm-4:45 pm

Nonstop2h 55m

Chicago O'Hare Intl

Fri 8/22

5:52 pm-10:39 pm

1 stop5h 47m

$219

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Thu 4/10

5:20 am-12:38 pm

1 stop6h 18m

Chicago O'Hare Intl

Mon 4/14

5:05 pm-11:12 pm

2 stops7h 07m

$264

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Fri 6/6

6:00 am-9:54 am

Nonstop2h 54m

Chicago O'Hare Intl

Sat 6/7

9:55 am-12:01 pm

Nonstop3h 06m

$289

BillingsMoline

BIL - MLI

BILMLI

Billings Logan Intl

Wed 4/9

2:30 pm-9:03 pm

1 stop5h 33m

Moline Quad-City

Sun 4/13

8:55 am-1:18 pm

1 stop5h 23m

$289

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Mon 5/19

5:20 am-1:34 pm

1 stop7h 14m

Lambert-St Louis

Fri 5/23

6:05 pm-12:19 am

2 stops7h 14m

$318

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Fri 5/9

2:50 pm-5:25 am

1 stop13h 35m

Chicago O'Hare Intl

Sun 5/18

9:02 pm-9:31 pm

1 stop25h 29m

$350

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Sat 8/30

6:00 am-11:50 pm

2 stops16h 50m

Chicago O'Hare Intl

Tue 9/9

3:15 pm-12:11 am

1 stop9h 56m

$431

BillingsChicago

BIL - MDW

BILMDW

Billings Logan Intl

Wed 7/23

6:25 am-1:02 pm

1 stop5h 37m

Chicago Midway

Sun 7/27

1:00 pm-10:38 pm

2 stops10h 38m

$456

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Wed 4/23

7:45 am-6:01 pm

1 stop9h 16m

Chicago O'Hare Intl

Mon 4/28

3:44 pm-11:59 pm

1 stop9h 15m

$717

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Tue 8/12

6:15 am-9:57 am

Nonstop2h 42m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 16 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 $323). 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 March 26, 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.

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 March 26, 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
9,789 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,789 reviews
Alaska Airlines
8.0
Very good
9,789 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,891 reviews
Alaska Airlines
8.0
Very good
9,789 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,331 reviews
Alaska Airlines
8.0
Very good
9,789 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,608 reviews
Alaska Airlines
8.0
Very good
9,789 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,789 reviews

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 American Airlines, with whom users have recently found tickets for as low as $149. However, be on the lookout for offers from Delta and Alaska 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 $174. On average you can expect to pay $664. The most popular route, (Billings Logan Intl - Chicago O'Hare Intl), can usually be booked for $219.

  • 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 $323). 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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$309Average$676FlexibilityNo cancel feeOn-time69%
DeltaCheapest$314Average$353FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$429Average$633FlexibilityNo cancel feeOn-time71%
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