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$162+ 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 2/19. Fares are subject to change and may not be available on all flights or dates of travel.
BIL — ORD
Jan 21 — Jan 281
Tue 1/21
Tue 1/28
1 adult, Economy
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Cheap flight deals from Billings to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Billings (BIL) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 16, 2025.

Round-trip from

$325
(Delta)

One-way from

$162
(Alaska Airlines)
From Billings Logan Intl to Illinois
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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 January 16, 2025.

This American Airlines deal was found by Cheapflights users on 1/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/206:15 amBIL - ORD
Nonstop2h 42mAmerican Airlines
Sat 8/238:20 pmORD - BIL
Nonstop3h 22mAmerican Airlines
Deal found 1/15$317
This Delta deal was found by Cheapflights users on 1/16. 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.
Tue 4/85:20 amBIL - STL
1 stop7h 02mDelta
Tue 4/155:30 pmSTL - BIL
1 stop6h 42mDelta
Deal found 1/16$325
This Delta deal was found by Cheapflights users on 1/16. 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 4/26:29 amBIL - MDW
1 stop6h 46mDelta
Wed 4/91:15 pmMDW - BIL
2 stops12h 01mDelta
Deal found 1/16$330
This United Airlines deal was found by Cheapflights users on 1/15. 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.
Fri 2/215:54 pmBIL - ORD
1 stop5h 04mUnited Airlines
Wed 2/262:35 pmORD - BIL
1 stop7h 23mUnited Airlines
Deal found 1/15$331
This Delta deal was found by Cheapflights users on 1/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/96:29 amBIL - ORD
1 stop4h 01mDelta
Wed 3/126:45 pmORD - BIL
1 stop6h 36mDelta
Deal found 1/15$335
This United deal was found by Cheapflights users on 1/16. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/87:00 amBIL - STL
2 stops7h 47mUnited Airlines
Tue 4/159:39 amSTL - BIL
2 stops12h 19mUnited Airlines
Deal found 1/16$461
This Alaska Airlines deal was found by Cheapflights users on 1/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/157:15 pmBIL - ORD
1 stop8h 49mAlaska Airlines
Sat 5/177:00 amORD - BIL
1 stop7h 15mAlaska Airlines
Deal found 1/14$518
This Alaska Airlines deal was found by Cheapflights users on 1/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/52:55 pmBIL - STL
2 stops32h 04mAlaska Airlines
Sat 3/83:21 pmSTL - BIL
2 stops22h 53mAlaska Airlines
Deal found 1/15$524
This American Airlines deal was found by Cheapflights users on 1/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/316:56 amBIL - EVV
1 stop7h 20mAmerican Airlines
Tue 2/43:46 pmEVV - BIL
1 stop6h 53mAmerican Airlines
Deal found 1/15$649
This American Airlines deal was found by Cheapflights users on 1/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/305:00 amBIL - STL
1 stop7h 42mAmerican Airlines
Sun 2/21:40 pmSTL - BIL
1 stop8h 59mAmerican Airlines
Deal found 1/15$649
This Mytrip deal was found by Cheapflights users on 1/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/1711:22 amBIL - ORD
2 stops26h 01mMultiple Airlines
Sun 1/1911:45 amORD - BIL
3 stops23h 27mMultiple Airlines
Deal found 1/14$818

Find flights from Billings to Illinois within your budget

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 January 16, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Tue 4/8

5:20 am-1:22 pm

1 stop7h 02m

Lambert-St Louis

Tue 4/15

5:30 pm-11:12 pm

1 stop6h 42m

$325

BillingsChicago

BIL - MDW

BILMDW

Billings Logan Intl

Wed 4/2

6:29 am-2:15 pm

1 stop6h 46m

Chicago Midway

Wed 4/9

1:15 pm-12:16 am

2 stops12h 01m

$330

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Fri 2/21

5:54 pm-11:58 pm

1 stop5h 04m

Chicago O'Hare Intl

Wed 2/26

2:35 pm-8:58 pm

1 stop7h 23m

$331

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Sun 3/9

6:29 am-11:30 am

1 stop4h 01m

Chicago O'Hare Intl

Wed 3/12

6:45 pm-12:21 am

1 stop6h 36m

$335

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Tue 4/8

7:00 am-3:47 pm

2 stops7h 47m

Lambert-St Louis

Tue 4/15

9:39 am-8:58 pm

2 stops12h 19m

$461

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Thu 5/15

7:15 pm-5:04 am

1 stop8h 49m

Chicago O'Hare Intl

Sat 5/17

7:00 am-1:15 pm

1 stop7h 15m

$518

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Wed 3/5

2:55 pm-11:59 pm

2 stops32h 04m

Lambert-St Louis

Sat 3/8

3:21 pm-1:14 pm

2 stops22h 53m

$524

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Sat 5/31

2:00 pm-8:45 pm

1 stop5h 45m

Chicago O'Hare Intl

Sun 6/8

8:20 pm-10:42 pm

Nonstop3h 22m

$629

BillingsEvansville

BIL - EVV

BILEVV

Billings Logan Intl

Fri 1/31

6:56 am-3:16 pm

1 stop7h 20m

Evansville Dress Regional

Tue 2/4

3:46 pm-9:39 pm

1 stop6h 53m

$649

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Thu 1/30

5:00 am-1:42 pm

1 stop7h 42m

Lambert-St Louis

Sun 2/2

1:40 pm-9:39 pm

1 stop8h 59m

$649

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/15

Showing 1-10 of 18 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.

Travel insights for flights from Billings to Illinois

Get recent, data-driven insights about flights from Billings to Illinois including ideal travel times, pricing trends, and more.

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 $320). 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 January 16, 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 January 16, 2025.
See what other customers who have flown with Alaska Airlines, American Airlines and Delta 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
9,681 reviews

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Comfort

7.9

Reviews

1 / 10

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
9,681 reviews
Alaska Airlines
8.0
Very good
9,681 reviews

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Comfort

7.9

Reviews

1 / 10

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
8,511 reviews
Alaska Airlines
8.0
Very good
9,681 reviews

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Comfort

7.9

Reviews

1 / 10

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
8,965 reviews
Alaska Airlines
8.0
Very good
9,681 reviews

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Comfort

7.9

Reviews

1 / 10

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
9,681 reviews

Overall

8.0

Boarding

8.2

Food

7.1

Crew

8.5

Entertainment

7.1

Comfort

7.9

Reviews

1 / 10

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 Alaska Airlines, with whom users have recently found tickets for as low as $162. However, be on the lookout for offers from Delta 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 - Lambert-St Louis or Billings Logan Intl - Chicago Midway 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 $283. On average you can expect to pay $800. The most popular route, (Billings Logan Intl - Chicago O'Hare Intl), can usually be booked for $331.

  • 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 $320). 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 January 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$314Average$565FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$439Average$640FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$518Average$608FlexibilityNo cancel feeOn-time69%
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