$130 Find Cheap Flights from Billings to Illinois

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Billings to Illinois departing on 8/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Illinois

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Billings to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Billings to Illinois, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Billings to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicago1 stop$302
Moline
Moline1 stop$465
St. Louis
St. Louis1 stop$409
Chicago
Chicago1 stop$302
Moline
Moline1 stop$465
St. Louis
St. Louis1 stop$409

Book Cheap Billings to Illinois Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Billings to Illinois that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Billings to Illinois

Thu, Sep 10 - Sat, Sep 12
Delta Logo
6:15 am - 1:11 pm
BIL
-
MDW
5h 56m
1 stop
Delta Logo
2:00 pm - 7:37 pm
MDW
-
BIL
6h 37m
1 stop
$302Delta
Sat, Aug 8 - Mon, Aug 10
Delta Logo
5:20 am - 11:59 am
BIL
-
ORD
5h 39m
1 stop
Delta Logo
5:57 pm - 11:30 pm
ORD
-
BIL
6h 33m
1 stop
$302Delta
Sat, Sep 12 - Mon, Sep 21
Delta Logo
5:45 am - 12:21 pm
BIL
-
ORD
5h 36m
1 stop
Delta Logo
2:00 pm - 11:11 pm
ORD
-
BIL
10h 11m
2 stops
$307Delta
Thu, Aug 27 - Mon, Aug 31
American Airlines Logo
12:22 pm - 4:23 pm
BIL
-
ORD
3h 01mnonstop
American Airlines Logo
9:40 am - 11:50 am
ORD
-
BIL
3h 10mnonstop
$313American Airlines
Sat, Sep 12 - Mon, Sep 21
United Airlines Logo
5:00 am - 12:19 pm
BIL
-
ORD
6h 19m
1 stop
United Airlines Logo
5:00 am - 9:41 am
ORD
-
BIL
5h 41m
1 stop
$331United Airlines
Sat, Jul 11 - Sat, Jul 25
United Airlines Logo
6:00 pm - 12:44 am
BIL
-
ORD
5h 44m
1 stop
United Airlines Logo
5:00 am - 9:35 am
ORD
-
BIL
5h 35m
1 stop
$339United Airlines
Wed, Aug 26 - Sun, Aug 30
American Airlines Logo
12:22 pm - 4:23 pm
BIL
-
ORD
3h 01mnonstop
American Airlines Logo
9:40 am - 11:50 am
ORD
-
BIL
3h 10mnonstop
$343American Airlines
Fri, Jul 10 - Thu, Jul 16
Multiple Airlines Logo
10:04 am - 6:15 pm
BIL
-
STL
7h 11m
1 stop
Multiple Airlines Logo
8:08 pm - 9:14 am
STL
-
BIL
14h 06m
2 stops
$498Multiple Airlines
Thu, Jul 30 - Sun, Aug 2
Alaska Airlines Logo
6:00 am - 4:37 pm
BIL
-
STL
9h 37m
2 stops
Alaska Airlines Logo
5:37 pm - 6:42 pm
STL
-
BIL
26h 05m
2 stops
$938Alaska Airlines
Fri, Jul 10 - Thu, Jul 16
Alaska Airlines Logo
6:00 am - 4:37 pm
BIL
-
STL
9h 37m
2 stops
Alaska Airlines Logo
6:02 am - 3:03 pm
STL
-
BIL
10h 01m
2 stops
$1,052Alaska Airlines
Booking Insights

KAYAK's insights & trends for Billings to Illinois flights

Get data-powered insights and trends into flights from Billings to Illinois to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Billings to Illinois?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Billings to Illinois departing in August.

What is the cheapest Billings to Illinois flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Illinois from Billings found in the last 5 days was to Chicago, at $285 round-trip. The most popular route is from Billings (BIL) to Chicago O'Hare Intl Airport (ORD), and the cheapest round-trip airline ticket found on this route in the last 5 days was $285.

What is the cheapest time of day to fly to Illinois?

The average price for all round-trip flights from Billings to Illinois depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Illinois is generally in the morning, when round-trip flights cost $490 on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $505.

Can I save money by flying with a layover from Billings to Illinois?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $454, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Billings to Illinois?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Billings to Illinois, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Billings to Illinois is March, when tickets cost $210 (return) on average. On the other hand, the most expensive months are June and May, when the average cost of round-trip tickets is $319 and $303 respectively.

What’s the cheapest day of the week to fly from Billings to Illinois?

The average price of all round-trip flights from Billings to Illinois clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Illinois on a Thursday and more expensive on a Monday. On your return trip to Billings, you should consider flying back on a Friday, and avoid Mondays for better deals.

Good to know

Low seasonAugust
Cheapest flight$130
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 13% increase in price.
Flight from Billings to St. Louis

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Billings to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Billings to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Billings to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Billings to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Billings to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Billings to Illinois with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Billings to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Billings to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Billings to the following destinations at these prices or less: Chicago $348 one-way - $452 round-trip

Reviews of the top 3 airlines serving from Billings to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Billings to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Billings to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8404 reviews
7.8Entertainment
7.8Comfort
8.1Boarding
7.2Food
8.5Crew
Airline reviews

Flight attendants were great. Cheerful, upbeat and friendly. Jet, in particular, was fantastic.

10.0 ExcellentJOSEPH, Jun 2026
RIC - ATL
Read more Delta reviews

Flight attendants were great. Cheerful, upbeat and friendly. Jet, in particular, was fantastic.

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Two delays on two separate planes with parts they could not easily find and replace.

Over 5 hour delay with minimal updates or ability to standby for alternative flights. During boarding and 1 hr+ wait for takeoff, seats were drenched w water from air conditioning condensation and always leftover crumbs on carpet and seats

Boarded early, left early, arrived 40 mins early! A win win for me!

These airplanes should be illegal. The seats are two tight, it is a safety issue. Wheelchair support was ridiculously slow. We almost missed our flight.

This flight is a quick way to get to Chicago, but a bit expensive.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

boarded early to only find out that flight would sit at gate for 45 min to an hour. Landed in chicago and sat on runway for over an hour before got to gate. Total delay was extensive for a 45 min flight door to door.

The flight was significantly delayed. The inbound flight from EWR was delayed departing because of mechanical problems. My original departure from CLT was 5:28 pm but due to the delay of the inbound flight, after arrival, deplaning, cleaning, boarding, we did not push back from the gate until 9:00 pm. Once in the air, the flight was smooth and what was originally supposed to be an arrival in ORD at 7:30 pm local time turned out to be 9:35 pm.

The flight I was supposed to be on was supposed to take off at 1:50 from State College. It was delayed over and over and over again until somehow I had to rebook on a flight that was supposed to have left State College at 8 am that morning but didn't end up taking off until almost 6 pm. Not only was this completely unacceptable, the "token from United" was a 15 dollar meal voucher that has to be used by today. I would personally like some miles added to my account for this inconvenience. I was in transit for 8 hours from the time I arrive at State College Aiport to when I got home. I was supposed to be home at 3 pm and I returned at 8 pm. Unacceptable. I have not been on an on Time united flight in nearly 5 years.

The flight was delayed significantly and we sat on runway after landing for awhile. Best thing was the flight attendant, Jenny, in first class, who was very professional and attentive. She was excellent - the rest of the flight was not.

The flight attendants were extremely sourly and borderline rude. I did not feel appreciated as an AA customer once.

The flight from LA to Chicago was smooth and service was very good overall.

The Mario was so helpful and provided amazing customer service however l have being waiting for a callback for almost a week now and have not heard anything further after l informed them l wanted to change my date of traveling because of my hospital appointment even send them proof and l was unable to use manag your booking on their website is a bit frustrating and l would appreciate an update on My request as soon as possible. And have called them times without numbers no response

Awful, tons of delays, I got into Chicago multiple hours late meaning I hit the very traffic I tried so desperately to avoid. Just empty apologies from American Airlines text alerts. Trash behavior from a trash airline.

They lost my baggage and I am still struggling to the information and update

Requested early boarding to disinfect seat, tray table, etc. before general boarding. Instructed to board after wheelchair passengers. Waited on jet bridge behind 12 wheelchair passengers. Stopped immediately after entering plane to wait for gate agent in rear of plane cleaning a seat that was wet, got to my row and found both seats adjacent to mine already occupied, with the lack of room making it impossible for me to clean my own space and defeating the purpose of my boarding early. Cleaned the armrests and tray table as best I could.

The wifi experience is awful. I had to try again and again, taking over 30 minutes, to connect to the wifi. I had to watch the same two ads over and over until I was finally successful. Once connected, it was anything but "high speed" and disconnected at least three times during the flight.

It was good, the staff was great, and the food, was as usual, tea and biscuit. Bathroom was clean, and the plane was clean as well.

Very good I can’t complain one bit. Thank you American Airlines for making my flight enjoyable and safe!

Everything you need to know for your flight from Billings to Illinois

Information on your arrival and departure airports