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Cheap flights from Billings to Illinois from $95

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Billings to Illinois departing on 12/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Billings to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:24 pm - 9:48 pmBIL-STL
22h 24m1 stop
Multiple Airlines Logo
3:30 pm - 9:12 amSTL-BIL
42h 42m2 stops
$280Multiple Airlines
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Thu, Dec 11 - Wed, Dec 17
Delta Logo
6:10 am - 1:09 pmBIL-MDW
5h 59m1 stop
Delta Logo
1:49 pm - 7:36 pmMDW-BIL
6h 47m1 stop
$291Delta
Find Deal
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
10:02 am - 9:48 pmBIL-STL
10h 46m1 stop
Multiple Airlines Logo
3:30 pm - 9:12 amSTL-BIL
42h 42m2 stops
$304Multiple Airlines
Find Deal
Fri, Dec 12 - Wed, Dec 17
Delta Logo
6:25 am - 11:43 amBIL-ORD
4h 18m1 stop
Delta Logo
5:42 pm - 11:48 pmORD-BIL
7h 06m1 stop
$312Delta
Find Deal
Sat, Dec 6 - Mon, Dec 8
Multiple Airlines Logo
12:07 pm - 12:12 pmBIL-STL
23h 05m1 stop
Multiple Airlines Logo
3:30 pm - 9:12 amSTL-BIL
42h 42m2 stops
$313Multiple Airlines
Find Deal
Wed, Dec 10 - Wed, Dec 17
United Airlines Logo
5:54 pm - 11:59 pmBIL-ORD
5h 05m1 stop
United Airlines Logo
7:10 am - 1:18 pmORD-BIL
7h 08m1 stop
$337United Airlines
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Fri, Dec 5 - Sun, Dec 7
Alaska Airlines Logo
2:02 pm - 10:30 pmBIL-ORD
7h 28m1 stop
Alaska Airlines Logo
8:00 am - 12:08 amORD-BIL
17h 08m1 stop
$357Alaska Airlines
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Sat, Dec 6 - Sun, Dec 7
United Airlines Logo
2:35 pm - 10:52 pmBIL-ORD
7h 17m1 stop
United Airlines Logo
2:02 pm - 9:21 pmORD-BIL
8h 19m1 stop
$371United Airlines
Find Deal
Thu, Feb 26 - Mon, Mar 2
American Airlines Logo
7:52 am - 2:08 pmBIL-EVV
5h 16m1 stop
American Airlines Logo
3:49 pm - 8:50 pmEVV-BIL
6h 01m1 stop
$664American Airlines
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Wed, Mar 25 - Sat, Mar 28
American Airlines Logo
5:24 am - 9:42 pmBIL-EVV
15h 18m2 stops
American Airlines Logo
3:49 pm - 8:50 pmEVV-BIL
6h 01m1 stop
$841American Airlines
Find Deal
Wed, Mar 25 - Sat, Mar 28

United Airlines flights from Billings to Illinois

Our best United Airlines deals on Billings to Illinois flight tickets
United Airlines
Dec 5
BIL5:54 pmBillings Logan Intl
5h 05m
1 stop
ORD11:59 pmChicago O'Hare Intl
Dec 7
ORD7:10 amChicago O'Hare Intl
7h 08m
1 stop
BIL1:18 pmBillings Logan Intl
$337
Find similar
United Airlines
Feb 26
BIL2:35 pmBillings Logan Intl
7h 17m
1 stop
ORD10:52 pmChicago O'Hare Intl
Mar 2
ORD2:02 pmChicago O'Hare Intl
8h 19m
1 stop
BIL9:21 pmBillings Logan Intl
$371
Find similar
United Airlines
Nov 25
BIL5:00 amBillings Logan Intl
5h 23m
1 stop
ORD11:23 amChicago O'Hare Intl
Dec 4
ORD7:10 amChicago O'Hare Intl
7h 08m
1 stop
BIL1:18 pmBillings Logan Intl
$382
Find similar

Alaska Airlines flights from Billings to Illinois

Our best Alaska Airlines deals on Billings to Illinois flight tickets
Alaska Airlines
Dec 6
BIL2:02 pmBillings Logan Intl
7h 28m
1 stop
ORD10:30 pmChicago O'Hare Intl
Dec 7
ORD8:00 amChicago O'Hare Intl
17h 08m
1 stop
BIL12:08 amBillings Logan Intl
$357
Find similar
Alaska Airlines
Dec 5
BIL3:36 pmBillings Logan Intl
20h 33m
1 stop
ORD1:09 pmChicago O'Hare Intl
Dec 7
ORD8:00 amChicago O'Hare Intl
17h 08m
1 stop
BIL12:08 amBillings Logan Intl
$405
Find similar
Alaska Airlines
Dec 5
BIL3:36 pmBillings Logan Intl
21h 33m
2 stops
ORD2:09 pmChicago O'Hare Intl
Dec 7
ORD6:00 amChicago O'Hare Intl
19h 08m
1 stop
BIL12:08 amBillings Logan Intl
$418
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated November 13, 2025.
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

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Thu 12/11

10:24 pm-9:48 pm

1 stop22h 24m

Lambert-St Louis

Wed 12/17

3:30 pm-9:12 am

2 stops42h 42m

$280

BillingsChicago

BIL - MDW

BILMDW

Billings Logan Intl

Thu 2/26

6:10 am-1:09 pm

1 stop5h 59m

Chicago Midway

Mon 3/2

1:49 pm-7:36 pm

1 stop6h 47m

$291

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Fri 12/12

10:02 am-9:48 pm

1 stop10h 46m

Lambert-St Louis

Wed 12/17

3:30 pm-9:12 am

2 stops42h 42m

$304

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Sat 12/6

6:25 am-11:43 am

1 stop4h 18m

Chicago O'Hare Intl

Mon 12/8

5:42 pm-11:48 pm

1 stop7h 06m

$312

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Wed 12/10

12:07 pm-12:12 pm

1 stop23h 05m

Lambert-St Louis

Wed 12/17

3:30 pm-9:12 am

2 stops42h 42m

$313

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Fri 12/5

5:54 pm-11:59 pm

1 stop5h 05m

Chicago O'Hare Intl

Sun 12/7

7:10 am-1:18 pm

1 stop7h 08m

$337

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Sat 12/6

2:02 pm-10:30 pm

1 stop7h 28m

Chicago O'Hare Intl

Sun 12/7

8:00 am-12:08 am

1 stop17h 08m

$357

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Thu 2/26

2:35 pm-10:52 pm

1 stop7h 17m

Chicago O'Hare Intl

Mon 3/2

2:02 pm-9:21 pm

1 stop8h 19m

$371

BillingsEvansville

BIL - EVV

BILEVV

Billings Logan Intl

Wed 3/25

7:52 am-2:08 pm

1 stop5h 16m

Evansville Dress Regional

Sat 3/28

3:49 pm-8:50 pm

1 stop6h 01m

$664

BillingsEvansville

BIL - EVV

BILEVV

Billings Logan Intl

Wed 3/25

5:24 am-9:42 pm

2 stops15h 18m

Evansville Dress Regional

Sat 3/28

3:49 pm-8:50 pm

1 stop6h 01m

$841

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Billings to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Billings is in January. Flight prices, which tend to average around $248, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $261.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Billings to Illinois is on a Wednesday when prices can be found for as low as $419. Flights from Billings to Illinois on a Sunday will generally be more expensive and average around $579. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Billings to Illinois during this time can be as low as $477. Flights in the afternoon are often more expensive with an average ticket price of $570.

What is the cheapest Billings Logan Intl to Illinois flight route?

Fly from Billings Logan Intl to Chicago O'Hare Intl for the best Billings Logan Intl - Illinois flight prices

What cabin class options are available on Billings Logan Intl to Illinois flights?

There are 4 cabin classes available to choose from on Billings Logan Intl to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Billings to Illinois flights?

You could potentially save up to 15% on your flight if you consider stops on a Billings to Illinois flight.

Cheap Billings to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Billings to Illinois

Best Price Found

$360

Direct flights

None
The best one-way flight to Illinois from Billings in the past 72 hours is $360. The best round-trip flight deal from Billings to Illinois found on momondo in the last 72 hours is $457.
There are no direct flights from Billings to Illinois. Popular non-direct route for this connection is Billings Logan Intl Airport - Chicago O'Hare Intl Airport.
Search flight deals

  • When did momondo last update prices for flights from Billings Logan Intl Airport to Illinois?

    Prices for flights from Billings Logan Intl Airport to Illinois are updated daily.

  • How many operators does momondo search for flights from Billings Logan Intl Airport to Illinois?

  • How old do you have to be to fly from Billings Logan Intl Airport to Illinois?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Billings Logan Intl Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Billings to Illinois?

Best airlines flying from Billings to Illinois

Compare and see reviews for airlines that fly from Billings to Illinois with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $225Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
United AirlinesPriceFrom $239Free CancellationRating
7.4
9,015 reviews
Search United Airlines flights
DeltaPriceFrom $248Free CancellationRating
7.9
8,009 reviews
Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Billings to Illinois?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Billings to Illinois. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Billings to Illinois with flexible booking policies on momondo?

Flights from Billings to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Billings to Illinois?

momondo provides multiple filters to help you find the best flight to Illinois from Billings. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Billings to Illinois right now. Can momondo alert me if prices change?

Price alerts on flights to Illinois from Billings are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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