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Cheap flights from Billings to Illinois from $105

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 3/19. 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.
Delta Logo
6:25 am - 1:25 pm
BIL
-
MDW
6h 00m
1 stop
Delta Logo
2:05 pm - 8:19 pm
MDW
-
BIL
7h 14m
1 stop
$209Delta
Tue, Mar 31 - Sat, Apr 4
Delta Logo
5:15 am - 12:18 pm
BIL
-
ORD
6h 03m
1 stop
Delta Logo
3:59 pm - 8:19 pm
ORD
-
BIL
5h 20m
1 stop
$209Delta
Thu, Mar 26 - Mon, Mar 30
Delta Logo
6:25 am - 5:54 pm
BIL
-
MDW
10h 29m
2 stops
Delta Logo
2:05 pm - 8:19 pm
MDW
-
BIL
7h 14m
1 stop
$214Delta
Tue, Mar 31 - Sat, Apr 4
Delta Logo
6:25 am - 6:34 pm
BIL
-
ORD
11h 09m
2 stops
Delta Logo
5:00 pm - 10:29 pm
ORD
-
BIL
6h 29m
1 stop
$214Delta
Tue, Mar 31 - Sat, Apr 4
United Airlines Logo
2:35 pm - 10:55 pm
BIL
-
ORD
7h 20m
1 stop
United Airlines Logo
7:00 am - 1:23 pm
ORD
-
BIL
7h 23m
1 stop
$299United Airlines
Fri, Mar 6 - Tue, Mar 10
United Airlines Logo
2:35 pm - 11:34 pm
BIL
-
STL
7h 59m
1 stop
United Airlines Logo
9:00 am - 1:23 pm
STL
-
BIL
5h 23m
1 stop
$309United Airlines
Fri, Mar 6 - Tue, Mar 10
American Airlines Logo
1:51 pm - 11:29 pm
BIL
-
MLI
8h 38m
1 stop
American Airlines Logo
3:48 pm - 10:43 pm
MLI
-
BIL
7h 55m
1 stop
$314American Airlines
Tue, Apr 7 - Sat, Apr 11
American Airlines Logo
1:51 pm - 11:29 pm
BIL
-
MLI
8h 38m
1 stop
American Airlines Logo
3:48 pm - 10:43 pm
MLI
-
BIL
7h 55m
1 stop
$329American Airlines
Tue, Apr 7 - Sat, Apr 11
Alaska Airlines Logo
7:21 pm - 4:37 pm
BIL
-
STL
20h 16m
2 stops
Alaska Airlines Logo
7:41 pm - 2:54 pm
STL
-
BIL
20h 13m
2 stops
$662Alaska Airlines
Sat, Jun 6 - Mon, Jun 8
Alaska Airlines Logo
7:11 pm - 5:13 pm
BIL
-
STL
21h 02m
2 stops
Alaska Airlines Logo
6:20 pm - 12:56 pm
STL
-
BIL
19h 36m
2 stops
$712Alaska Airlines
Thu, Jun 18 - Sun, Jun 21

Delta flights from Billings to Illinois

Our best Delta deals on Billings to Illinois flight tickets
Delta
Mar 26
BIL5:15 amBillings Logan Intl
6h 03m
1 stop
ORD12:18 pmChicago O'Hare Intl
Mar 30
ORD3:59 pmChicago O'Hare Intl
5h 20m
1 stop
BIL8:19 pmBillings Logan Intl
$209
Delta
Mar 31
BIL6:25 amBillings Logan Intl
11h 09m
2 stops
ORD6:34 pmChicago O'Hare Intl
Apr 4
ORD5:00 pmChicago O'Hare Intl
6h 29m
1 stop
BIL10:29 pmBillings Logan Intl
$214
Delta
Apr 12
BIL5:15 amBillings Logan Intl
6h 03m
1 stop
ORD12:18 pmChicago O'Hare Intl
Apr 18
ORD3:53 pmChicago O'Hare Intl
5h 13m
1 stop
BIL8:06 pmBillings Logan Intl
$229

United Airlines flights from Billings to Illinois

Our best United Airlines deals on Billings to Illinois flight tickets
United Airlines
May 23
BIL2:25 pmBillings Logan Intl
6h 14m
1 stop
ORD9:39 pmChicago O'Hare Intl
May 24
ORD7:52 pmChicago O'Hare Intl
3h 23m
BIL10:15 pmBillings Logan Intl
$239
United Airlines
May 23
BIL2:25 pmBillings Logan Intl
6h 14m
1 stop
ORD9:39 pmChicago O'Hare Intl
May 24
ORD5:00 amChicago O'Hare Intl
5h 34m
1 stop
BIL9:34 amBillings Logan Intl
$267
United Airlines
Mar 6
BIL2:35 pmBillings Logan Intl
7h 20m
1 stop
ORD10:55 pmChicago O'Hare Intl
Mar 10
ORD7:00 amChicago O'Hare Intl
7h 23m
1 stop
BIL1:23 pmBillings Logan Intl
$299

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 February 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

BillingsChicago

BIL - MDW

BILMDW

Billings Logan Intl

Tue 3/31

6:25 am-1:25 pm

1 stop6h 00m

Chicago Midway

Sat 4/4

2:05 pm-8:19 pm

1 stop7h 14m

$209

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Thu 3/26

5:15 am-12:18 pm

1 stop6h 03m

Chicago O'Hare Intl

Mon 3/30

3:59 pm-8:19 pm

1 stop5h 20m

$209

BillingsChicago

BIL - MDW

BILMDW

Billings Logan Intl

Tue 3/31

6:25 am-5:54 pm

2 stops10h 29m

Chicago Midway

Sat 4/4

2:05 pm-8:19 pm

1 stop7h 14m

$214

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Tue 3/31

6:25 am-6:34 pm

2 stops11h 09m

Chicago O'Hare Intl

Sat 4/4

5:00 pm-10:29 pm

1 stop6h 29m

$214

BillingsChicago

BIL - ORD

BILORD

Billings Logan Intl

Fri 3/6

2:35 pm-10:55 pm

1 stop7h 20m

Chicago O'Hare Intl

Tue 3/10

7:00 am-1:23 pm

1 stop7h 23m

$299

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Fri 3/6

2:35 pm-11:34 pm

1 stop7h 59m

Lambert-St Louis

Tue 3/10

9:00 am-1:23 pm

1 stop5h 23m

$309

BillingsMoline

BIL - MLI

BILMLI

Billings Logan Intl

Tue 4/7

1:51 pm-11:29 pm

1 stop8h 38m

Moline Quad-City

Sat 4/11

3:48 pm-10:43 pm

1 stop7h 55m

$314

BillingsMoline

BIL - MLI

BILMLI

Billings Logan Intl

Tue 4/7

1:51 pm-11:29 pm

1 stop8h 38m

Moline Quad-City

Sat 4/11

3:48 pm-10:43 pm

1 stop7h 55m

$329

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Sat 6/6

7:21 pm-4:37 pm

2 stops20h 16m

Lambert-St Louis

Mon 6/8

7:41 pm-2:54 pm

2 stops20h 13m

$662

BillingsSt. Louis

BIL - STL

BILSTL

Billings Logan Intl

Thu 6/18

7:11 pm-5:13 pm

2 stops21h 02m

Lambert-St Louis

Sun 6/21

6:20 pm-12:56 pm

2 stops19h 36m

$712

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 $253, 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 $435. Flights from Billings to Illinois on a Sunday will generally be more expensive and average around $588. 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 $478. Flights at noon are often more expensive with an average ticket price of $505.

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.

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

$466

Fastest flight time

3h 00m

Direct flights

Mon, Tue, Thu, Fri and Sun

Airports in Illinois

98 airports
The best one-way flight to Illinois from Billings in the past 72 hours is $466. The best round-trip flight deal from Billings to Illinois found on momondo in the last 72 hours is $358.
The fastest flight from Billings to Illinois takes 3h 00m
Direct flights go from Billings to Illinois on Monday, Tuesday, Thursday, Friday and Sunday. There are no airlines offering direct flights.
There are 98 airports in Illinois. From Billings there are direct flights to Chicago O'Hare Intl (ORD).
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
11,338 reviews
Search American Airlines flights
DeltaPriceFrom $230Free CancellationRating
7.9
8,241 reviews
Search Delta flights
United AirlinesPriceFrom $239Free CancellationRating
7.4
9,341 reviews
Search United Airlines 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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