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Cheap flights from Illinois to Billings from $159

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Billings departing on 8/30. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Billings

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:10 pm - 9:10 am
STL
-
BIL
15h 00m
1 stop
Multiple Airlines Logo
10:00 am - 6:15 pm
BIL
-
STL
7h 15m
1 stop
$258Multiple Airlines
Thu, Aug 6 - Mon, Aug 17
Delta Logo
6:45 pm - 11:30 pm
ORD
-
BIL
5h 45m
1 stop
Delta Logo
5:20 am - 11:59 am
BIL
-
ORD
5h 39m
1 stop
$271Delta
Tue, Aug 11 - Wed, Aug 19
Multiple Airlines Logo
7:10 pm - 9:10 am
STL
-
BIL
15h 00m
1 stop
Multiple Airlines Logo
10:00 am - 6:15 pm
BIL
-
STL
7h 15m
1 stop
$294Multiple Airlines
Sun, Aug 9 - Mon, Aug 17
Delta Logo
7:25 pm - 11:30 pm
MDW
-
BIL
5h 05m
1 stop
Delta Logo
6:26 am - 1:10 pm
BIL
-
MDW
5h 44m
1 stop
$302Delta
Mon, Aug 17 - Sat, Aug 22
Multiple Airlines Logo
7:10 pm - 9:10 am
STL
-
BIL
15h 00m
1 stop
Multiple Airlines Logo
10:00 am - 6:15 pm
BIL
-
STL
7h 15m
1 stop
$302Multiple Airlines
Thu, Aug 6 - Fri, Aug 14
Delta Logo
5:57 pm - 11:30 pm
ORD
-
BIL
6h 33m
1 stop
Delta Logo
5:20 am - 11:59 am
BIL
-
ORD
5h 39m
1 stop
$302Delta
Mon, Aug 17 - Sat, Aug 22
United Airlines Logo
5:00 am - 9:35 am
ORD
-
BIL
5h 35m
1 stop
United Airlines Logo
4:10 pm - 12:44 am
BIL
-
ORD
7h 34m
1 stop
$317United Airlines
Sat, Jul 25 - Thu, Jul 30
United Airlines Logo
4:40 pm - 9:00 pm
STL
-
BIL
5h 20m
1 stop
United Airlines Logo
10:30 am - 4:34 pm
BIL
-
STL
5h 04m
1 stop
$344United Airlines
Mon, Aug 24 - Sat, Aug 29
American Airlines Logo
6:00 am - 12:23 pm
PIA
-
BIL
7h 23m
1 stop
American Airlines Logo
12:53 pm - 6:41 pm
BIL
-
PIA
4h 48m
1 stop
$722American Airlines
Sat, Jun 27 - Wed, Jul 1
American Airlines Logo
7:31 am - 1:03 pm
CMI
-
BIL
6h 32m
1 stop
American Airlines Logo
6:00 am - 2:16 pm
BIL
-
CMI
7h 16m
1 stop
$940American Airlines
Wed, Jul 1 - Sun, Jul 5

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Delta flights from Illinois to Billings

Our best Delta deals on Illinois to Billings flight tickets
Delta
Aug 11
ORD6:45 pmChicago O'Hare Intl
5h 45m
1 stop
BIL11:30 pmBillings Logan Intl
Aug 19
BIL5:20 amBillings Logan Intl
5h 39m
1 stop
ORD11:59 amChicago O'Hare Intl
$271
Delta
Aug 17
ORD5:57 pmChicago O'Hare Intl
6h 33m
1 stop
BIL11:30 pmBillings Logan Intl
Aug 22
BIL5:20 amBillings Logan Intl
5h 39m
1 stop
ORD11:59 amChicago O'Hare Intl
$302
Delta
Oct 8
ORD8:15 amChicago O'Hare Intl
12h 33m
2 stops
BIL7:48 pmBillings Logan Intl
Oct 17
BIL6:15 amBillings Logan Intl
7h 42m
1 stop
ORD2:57 pmChicago O'Hare Intl
$307

United Airlines flights from Illinois to Billings

Our best United Airlines deals on Illinois to Billings flight tickets
United Airlines
Jul 25
ORD5:00 amChicago O'Hare Intl
5h 35m
1 stop
BIL9:35 amBillings Logan Intl
Jul 30
BIL4:10 pmBillings Logan Intl
7h 34m
1 stop
ORD12:44 amChicago O'Hare Intl
$317
United Airlines
Aug 24
STL4:40 pmLambert-St Louis
5h 20m
1 stop
BIL9:00 pmBillings Logan Intl
Aug 29
BIL10:30 amBillings Logan Intl
5h 04m
1 stop
STL4:34 pmLambert-St Louis
$344
United Airlines
Aug 24
STL4:40 pmLambert-St Louis
5h 20m
1 stop
BIL9:00 pmBillings Logan Intl
Aug 29
BIL10:30 amBillings Logan Intl
10h 30m
2 stops
STL10:00 pmLambert-St Louis
$349

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Billings 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 June 17, 2026.
Use the filters below to find and compare flights from Illinois to Billings that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Thu 8/6

7:10 pm-9:10 am

1 stop15h 00m

Billings Logan Intl

Mon 8/17

10:00 am-6:15 pm

1 stop7h 15m

$258

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Tue 8/11

6:45 pm-11:30 pm

1 stop5h 45m

Billings Logan Intl

Wed 8/19

5:20 am-11:59 am

1 stop5h 39m

$271

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Sun 8/9

7:10 pm-9:10 am

1 stop15h 00m

Billings Logan Intl

Mon 8/17

10:00 am-6:15 pm

1 stop7h 15m

$294

ChicagoBillings

MDW - BIL

MDWBIL

Chicago Midway

Mon 8/17

7:25 pm-11:30 pm

1 stop5h 05m

Billings Logan Intl

Sat 8/22

6:26 am-1:10 pm

1 stop5h 44m

$302

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Thu 8/6

7:10 pm-9:10 am

1 stop15h 00m

Billings Logan Intl

Fri 8/14

10:00 am-6:15 pm

1 stop7h 15m

$302

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Mon 8/17

5:57 pm-11:30 pm

1 stop6h 33m

Billings Logan Intl

Sat 8/22

5:20 am-11:59 am

1 stop5h 39m

$302

ChicagoBillings

ORD - BIL

ORDBIL

Chicago O'Hare Intl

Sat 7/25

5:00 am-9:35 am

1 stop5h 35m

Billings Logan Intl

Thu 7/30

4:10 pm-12:44 am

1 stop7h 34m

$317
Quickest round-trip

St. LouisBillings

STL - BIL

STLBIL

Lambert-St Louis

Mon 8/24

4:40 pm-9:00 pm

1 stop5h 20m

Billings Logan Intl

Sat 8/29

10:30 am-4:34 pm

1 stop5h 04m

$344

PeoriaBillings

PIA - BIL

PIABIL

Greater Peoria

Sat 6/27

6:00 am-12:23 pm

1 stop7h 23m

Billings Logan Intl

Wed 7/1

12:53 pm-6:41 pm

1 stop4h 48m

$722

ChampaignBillings

CMI - BIL

CMIBIL

Champaign University-Willard

Wed 7/1

7:31 am-1:03 pm

1 stop6h 32m

Billings Logan Intl

Sun 7/5

6:00 am-2:16 pm

1 stop7h 16m

$940

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 Billings from

How to get the cheapest flight ticket from Illinois to Billings

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 Billings?

The month of March is, on average, the cheapest month to fly to Billings from Illinois, with most prices found around $208. The month of September is another great option to travel to Billings, with average flight prices from Illinois averaging around $210.

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

Our data shows that Friday is the least expensive day to fly to Billings. Tickets to fly out on this day can be as low as $319. Flights from Illinois to Billings on a Monday will generally be more expensive and average around $590. 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 Billings?

According to our data, the cheapest time of day to fly to Billings is in the evening. momondo users have found flights departing from Illinois to Billings in the evening for as low as $300. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the morning is when there is more demand to fly to Billings, so prices are often more expensive at around $452 per ticket.

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

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

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

There are 3 cabin classes available to choose from on Illinois to Billings 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 Illinois to Billings flights?

You could potentially save up to 34% on your flight if you consider stops on a Illinois to Billings flight.

Cheap Illinois to Billings flight deals and tips

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

Best Price Found

$671

Fastest flight time

3h 14m

Direct flights

Every day

Airports in Billings

1 airport
The best flight deal from Illinois to Billings found on momondo in the last 72 hours is $671
The fastest flight from Illinois to Billings takes 3h 14m
Direct flights go from Illinois to Billings every day.
There is 1 airport in Billings. From Illinois there are direct flights to Billings Logan Intl (BIL).
Search flight deals

Frequently asked questions about flying from Illinois to Billings

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

    Prices for flights from Illinois to Billings Logan Intl Airport are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Billings Logan Intl Airport.

  • What documentation or ID do you need to fly to Billings Logan Intl Airport?

    The travel and health documents you'll need for your trip to Billings Logan Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Billings Logan Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from Illinois to Billings

Compare and see reviews for airlines that fly from Illinois to Billings with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $229Free CancellationRating
7.1
11,670 reviews
Search American Airlines flights
United AirlinesPriceFrom $244Free CancellationRating
7.4
9,845 reviews
Search United Airlines flights

Traveling to a place near Billings?

Book flights to Billings if you plan to visit one of these locations
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Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Billings. momondo saves you time and could save you money on your trip.

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

Yes. All flights to Billings from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

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

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

If you are simply researching potential flights to Billings, momondo offers a useful price alert feature which will track prices for flights to Billings from Illinois and alert you when they change.

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