What airlines fly to Illinois?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Illinois from Billings according to our data. United Airlines is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 3 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Billings Logan Intl to Illinois?

United Airlines and Delta are the most popular carriers operating from Billings Logan Intl to Illinois

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?

As of October 2026, there are 3 operators available to choose from 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.

$157 Cheap Flights from Billings to Illinois in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Billings to Illinois

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:34 am - 2:55 pmBIL Billings Logan Intl-ORD Chicago O'Hare Intl

7h 21m1 stop Minneapolis St Paul

4:00 pm - 10:20 pmORD Chicago O'Hare Intl-BIL Billings Logan Intl

7h 20m1 stop Salt Lake City

$321Delta

Wed, Nov 11 - Sat, Nov 14

5:00 am - 11:19 amBIL Billings Logan Intl-ORD Chicago O'Hare Intl

5h 19m1 stop Denver Intl

5:48 pm - 10:30 pmORD Chicago O'Hare Intl-BIL Billings Logan Intl

5h 42m1 stop Denver Intl

$321United Airlines

Tue, Nov 10 - Tue, Nov 17

6:34 am - 2:55 pmBIL Billings Logan Intl-ORD Chicago O'Hare Intl

7h 21m1 stop Minneapolis St Paul

8:04 am - 7:37 pmORD Chicago O'Hare Intl-BIL Billings Logan Intl

12h 33m2 stops Atlanta Hartsfield-Jackson Minneapolis St Paul

$326Delta

Wed, Nov 11 - Sat, Nov 14

6:34 am - 11:50 amBIL Billings Logan Intl-MDW Chicago Midway

4h 16m1 stop Minneapolis St Paul

1:31 pm - 7:37 pmMDW Chicago Midway-BIL Billings Logan Intl

7h 06m2 stops Detroit Metropolitan Wayne County Minneapolis St Paul

$326Delta

Wed, Nov 11 - Sat, Nov 14

2:38 pm - 9:33 pmBIL Billings Logan Intl-ORD Chicago O'Hare Intl

5h 55m1 stop Denver Intl

7:00 am - 1:30 pmORD Chicago O'Hare Intl-BIL Billings Logan Intl

7h 30m1 stop Denver Intl

$340United Airlines

Sat, Jan 30 - Mon, Feb 1

1:30 pm - 9:12 pmBIL Billings Logan Intl-ORD Chicago O'Hare Intl

6h 42m1 stop Dallas/Fort Worth

6:00 am - 12:59 pmORD Chicago O'Hare Intl-BIL Billings Logan Intl

7h 59m1 stop Dallas/Fort Worth

$349American Airlines

Thu, Jan 28 - Thu, Feb 4

5:55 pm - 11:59 pmBIL Billings Logan Intl-ORD Chicago O'Hare Intl

5h 04m1 stop Denver Intl

8:40 am - 1:29 pmORD Chicago O'Hare Intl-BIL Billings Logan Intl

5h 49m1 stop Denver Intl

$353United Airlines

Sun, Oct 25 - Thu, Oct 29

1:23 pm - 10:30 pmBIL Billings Logan Intl-ORD Chicago O'Hare Intl

8h 07m1 stop Dallas/Fort Worth

1:44 pm - 8:40 pmORD Chicago O'Hare Intl-BIL Billings Logan Intl

7h 56m1 stop Dallas/Fort Worth

$369American Airlines

Wed, Nov 11 - Sat, Nov 14

5:57 pm - 5:10 amBIL Billings Logan Intl-ORD Chicago O'Hare Intl

10h 13m1 stop Las Vegas Harry Reid Intl

7:32 pm - 4:08 pmORD Chicago O'Hare Intl-BIL Billings Logan Intl

21h 36m2 stops Atlanta Hartsfield-Jackson Las Vegas Harry Reid Intl

$439Multiple Airlines

Fri, Nov 20 - Tue, Dec 1

5:12 pm - 1:17 pmBIL Billings Logan Intl-ORD Chicago O'Hare Intl

19h 05m2 stops Seattle/Tacoma Intl San Diego

2:07 pm - 10:43 pmORD Chicago O'Hare Intl-BIL Billings Logan Intl

9h 36m2 stops Portland Seattle/Tacoma Intl

$543Alaska Airlines

Wed, Nov 11 - Sat, Nov 14

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United Airlines flights from Billings to Illinois

Our best United Airlines deals on Billings to Illinois flight tickets

United Airlines

Nov 10

BIL5:00 amBillings Logan Intl

5h 19m

1 stop

ORD11:19 amChicago O'Hare Intl

Nov 17

ORD5:48 pmChicago O'Hare Intl

5h 42m

1 stop

BIL10:30 pmBillings Logan Intl

$321

United Airlines

Oct 25

BIL5:55 pmBillings Logan Intl

5h 04m

1 stop

ORD11:59 pmChicago O'Hare Intl

Oct 29

ORD8:40 amChicago O'Hare Intl

5h 49m

1 stop

BIL1:29 pmBillings Logan Intl

$353

United Airlines

Jan 14

BIL2:38 pmBillings Logan Intl

5h 55m

1 stop

ORD9:33 pmChicago O'Hare Intl

Jan 17

ORD4:15 pmChicago O'Hare Intl

6h 00m

1 stop

BIL9:15 pmBillings Logan Intl

$357

Alaska Airlines flights from Billings to Illinois

Our best Alaska Airlines deals on Billings to Illinois flight tickets

Alaska Airlines

Nov 11

BIL5:12 pmBillings Logan Intl

19h 05m

2 stops

ORD1:17 pmChicago O'Hare Intl

Nov 14

ORD2:07 pmChicago O'Hare Intl

9h 36m

2 stops

BIL10:43 pmBillings Logan Intl

$543

Alaska Airlines

Nov 11

BIL3:32 pmBillings Logan Intl

13h 08m

2 stops

ORD5:40 amChicago O'Hare Intl

Nov 14

ORD9:30 amChicago O'Hare Intl

14h 13m

1 stop

BIL10:43 pmBillings Logan Intl

$568

Alaska Airlines

Nov 13

BIL5:12 pmBillings Logan Intl

19h 05m

2 stops

ORD1:17 pmChicago O'Hare Intl

Nov 15

ORD7:00 amChicago O'Hare Intl

29h 15m

1 stop

BIL11:15 amBillings Logan Intl

$598

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BillingsChicago

BIL Billings Logan Intl - ORD Chicago O'Hare Intl

BILORD

Billings Logan Intl

Wed 11/11

6:34 am-2:55 pm

1 stop7h 21m

Chicago O'Hare Intl

Sat 11/14

4:00 pm-10:20 pm

1 stop7h 20m

$321

BillingsChicago

BIL Billings Logan Intl - ORD Chicago O'Hare Intl

BILORD

Billings Logan Intl

Tue 11/10

5:00 am-11:19 am

1 stop5h 19m

Chicago O'Hare Intl

Tue 11/17

5:48 pm-10:30 pm

1 stop5h 42m

$321

BillingsChicago

BIL Billings Logan Intl - ORD Chicago O'Hare Intl

BILORD

Billings Logan Intl

Wed 11/11

6:34 am-2:55 pm

1 stop7h 21m

Chicago O'Hare Intl

Sat 11/14

8:04 am-7:37 pm

2 stops12h 33m

$326

BillingsChicago

BIL Billings Logan Intl - MDW Chicago Midway

BILMDW

Billings Logan Intl

Wed 11/11

6:34 am-11:50 am

1 stop4h 16m

Chicago Midway

Sat 11/14

1:31 pm-7:37 pm

2 stops7h 06m

$326

BillingsChicago

BIL Billings Logan Intl - ORD Chicago O'Hare Intl

BILORD

Billings Logan Intl

Sat 1/30

2:38 pm-9:33 pm

1 stop5h 55m

Chicago O'Hare Intl

Mon 2/1

7:00 am-1:30 pm

1 stop7h 30m

$340

BillingsChicago

BIL Billings Logan Intl - ORD Chicago O'Hare Intl

BILORD

Billings Logan Intl

Thu 1/28

1:30 pm-9:12 pm

1 stop6h 42m

Chicago O'Hare Intl

Thu 2/4

6:00 am-12:59 pm

1 stop7h 59m

$349

Quickest round-trip

BillingsChicago

BIL Billings Logan Intl - ORD Chicago O'Hare Intl

BILORD

Billings Logan Intl

Sun 10/25

5:55 pm-11:59 pm

1 stop5h 04m

Chicago O'Hare Intl

Thu 10/29

8:40 am-1:29 pm

1 stop5h 49m

$353

BillingsChicago

BIL Billings Logan Intl - ORD Chicago O'Hare Intl

BILORD

Billings Logan Intl

Wed 11/11

1:23 pm-10:30 pm

1 stop8h 07m

Chicago O'Hare Intl

Sat 11/14

1:44 pm-8:40 pm

1 stop7h 56m

$369

BillingsChicago

BIL Billings Logan Intl - ORD Chicago O'Hare Intl

BILORD

Billings Logan Intl

Fri 11/20

5:57 pm-5:10 am

1 stop10h 13m

Chicago O'Hare Intl

Tue 12/1

7:32 pm-4:08 pm

2 stops21h 36m

$439

BillingsChicago

BIL Billings Logan Intl - ORD Chicago O'Hare Intl

BILORD

Billings Logan Intl

Wed 11/11

5:12 pm-1:17 pm

2 stops19h 05m

Chicago O'Hare Intl

Sat 11/14

2:07 pm-10:43 pm

2 stops9h 36m

$543

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Billings is in February. Flight prices, which tend to average around $279, 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 February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $295.

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

The cheapest day to depart from Billings to Illinois is on a Saturday when prices can be found for as low as $448. Flights from Billings to Illinois on a Sunday will generally be more expensive and average around $842. 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 at noon. Flights from Billings to Illinois during this time can be as low as $505. Flights in the morning are often more expensive with an average ticket price of $658.

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 to Illinois flights?

There are 4 cabin classes available to choose from on Billings 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 28% 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	$157
Fastest flight time	4h 10m
Direct flights	None

The best one-way flight to Illinois from Billings in the past 72 hours is $157. The best round-trip flight deal from Billings to Illinois found on momondo in the last 72 hours is $321.

The fastest flight from Billings to Illinois takes 4h 10m

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

Frequently asked questions about flying from Billings to Illinois

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?
As of October 2026, there are 3 operators available to choose from 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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Billings to Illinois is Embraer 175 (68.97% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (10.34%), Embraer 175 (Enhanced Winglets) (6.90%), and Boeing 737-800 (3.45%).

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
Delta	PriceFrom $230	Free Cancellation	Rating 7.8 8,652 reviews	Search Delta flights
United Airlines	PriceFrom $249	Free Cancellation	Rating 7.4 10,366 reviews	Search United Airlines flights
American Airlines	PriceFrom $344	Free Cancellation	Rating 7.0 12,169 reviews	Search American 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.