$104 Find Cheap Flights from Idaho Falls 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 Idaho Falls to Illinois departing on 5/4. 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 Idaho Falls 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 Idaho Falls to Illinois, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Idaho Falls to Illinois

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Chicago
Chicago1 stop$269
Moline
Moline1 stop$389
St. Louis
St. Louis1 stop$367
Chicago
Chicago1 stop$269
Moline
Moline1 stop$389
St. Louis
St. Louis1 stop$367

Book Cheap Idaho Falls 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 Idaho Falls 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 Idaho Falls to Illinois

Tue, Mar 31 - Sun, Apr 5
Delta Logo
1:10 pm - 9:34 pm
IDA
-
ORD
7h 24m
1 stop
Delta Logo
7:20 am - 12:27 pm
ORD
-
IDA
6h 07m
1 stop
$269Delta
Tue, Mar 31 - Sun, Apr 5
Delta Logo
6:55 pm - 8:30 am
IDA
-
ORD
12h 35m
2 stops
Delta Logo
7:20 am - 12:27 pm
ORD
-
IDA
6h 07m
1 stop
$274Delta
Sat, Jun 13 - Tue, Jun 16
Alaska Airlines Logo
7:15 am - 4:43 pm
IDA
-
ORD
8h 28m
1 stop
Alaska Airlines Logo
7:20 am - 1:06 pm
ORD
-
IDA
6h 46m
1 stop
$303Alaska Airlines
Fri, May 8 - Mon, May 11
Multiple Airlines Logo
10:21 pm - 6:47 am
IDA
-
ORD
7h 26m
1 stop
Multiple Airlines Logo
5:15 am - 3:27 pm
ORD
-
IDA
11h 12m
2 stops
$304Multiple Airlines
Fri, Jun 12 - Sun, Jun 21
Multiple Airlines Logo
10:56 pm - 5:25 am
IDA
-
ORD
29h 29m
1 stop
Multiple Airlines Logo
9:59 pm - 4:08 pm
ORD
-
IDA
19h 09m
1 stop
$321Multiple Airlines
Sat, Jun 27 - Mon, Jul 6
United Airlines Logo
5:54 pm - 12:44 am
IDA
-
ORD
5h 50m
1 stop
United Airlines Logo
5:00 am - 9:50 am
ORD
-
IDA
5h 50m
1 stop
$327United Airlines
Wed, May 6 - Wed, May 13
United Airlines Logo
5:26 pm - 11:57 pm
IDA
-
ORD
5h 31m
1 stop
United Airlines Logo
7:00 am - 1:25 pm
ORD
-
IDA
7h 25m
1 stop
$328United Airlines
Sat, Jun 13 - Sat, Jun 20
Alaska Airlines Logo
7:15 am - 4:43 pm
IDA
-
ORD
8h 28m
1 stop
Alaska Airlines Logo
7:20 am - 1:06 pm
ORD
-
IDA
6h 46m
1 stop
$337Alaska Airlines
Wed, Jun 24 - Wed, Aug 5
American Airlines Logo
12:36 pm - 5:03 pm
IDA
-
ORD
3h 27mnonstop
American Airlines Logo
9:55 am - 12:10 pm
ORD
-
IDA
3h 15mnonstop
$340American Airlines
Thu, Apr 30 - Sat, May 9
American Airlines Logo
1:43 pm - 10:59 pm
IDA
-
STL
8h 16m
1 stop
American Airlines Logo
5:20 am - 1:13 pm
STL
-
IDA
8h 53m
1 stop
$455American Airlines
Useful Info

Good to know

Low seasonFebruary
Cheapest flight$104
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from Idaho Falls to Chicago O'Hare Airport

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from Idaho Falls to the following destinations at these prices or less: Chicago $296 one-way - $562 round-trip

Reviews of the top 3 airlines serving from Idaho Falls to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Idaho Falls 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 Idaho Falls 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 8245 reviews
7.9Comfort
7.2Food
7.8Entertainment
8.5Crew
8.1Boarding
Airline reviews

The whole experience was excellent. As it most often is with Delta

10.0 ExcellentRay, Mar 2026
LGA - MCO
Read more Delta reviews

The whole experience was excellent. As it most often is with Delta

Cabin was not pressurized properly. Several passengers had respiratory difficulties.

I was happy that I was able to get a last minute flight but unfortunately my seat was a middle seat. Even with Delta Comfort I wasn't comfortable

There’s not much to say about a one hour flight. This is a connection from LA to RNO that I missed the previous night due to a mechanical check delay on my originating flight from JFK to LAX. The short flight itself was fine. Instructions from the pilot and crew were per usual. The coffee was barely lukewarm, which possibly was purposeful so we would down it quickly. Bags were already on carousel upon reaching baggage claim, which was excellent.

Flight was warm for first few hours and quite rough

Seat was extremely hard which made even a short 1 hour 20 minute flight fairly uncomfortable.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The staff was fine. The plane was extremely tight, and I paid for the wifi and it did not work at all. I was actually going to ask for a refund.

two hour delay and the Delta representative on the PA system was unable to understand

An awesome flight crew. FC seat cushion just doesn’t cut it for a 3+ hour flight.

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

United Airlines is my preferred airlines and I am thankful for Gary who also help support me on the phone to switch my flight literally last min.

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

They did the one thing that really matters - got to Chicago early.

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

The chicken wrap was tiny ($13 for what looked like a 1/3 of a normal wrap?) and disgusting.

It was good experience this time. The flight was on time.

There was a delay with the plan which cause the flight to leave later and once arrived in Chicago there was another delay and some passengers missed their connecting flights

The gate agent had a really bad attitude and refused to help me get on the standby list. She just handed me a card and said I needed to call a number. I asked her to help with the AA app on my phone and she just shrugged and said she didnt know. After a few phone calls, I eventually just went to a different gate agent on the other side of the terminal and got the help I needed.

Overall, my last three trips on American Airlines have all been either delayed or "rescheduled" due to mechanical issues. At least on delay caused me to miss two possible connecting flights each later than the first. My last option for my last connection required the assistance of the onsite service desk (O'Hare Airport). The wait time for the service desk was such that it jeopardized getting booked on the last connecting flight available for the night. Suffice it to say, my latest experiences with American Airlines have caused me extensive loss of productive business and personal time and can therefore be classified as significantly less than satisfactory.

Waiting for gate in RDU for more than 20mins is crazy.

American Airlines was great and worked very hard to change my ticket so I could get an earlier, direct flight back to Dallas. However, I was informed that Kayak made mistakes with my itinerary and classified my ticket as desiring to be on the earlier flight instead of taking the necessary step of calling AA to get me on the standby list. This ended up keeping me from being added to the standby list and delayed me getting home by 6 hours. I am happy to discuss this further with Kayak so they can correct their procedures so this won't happen again.

Waited for oxygen tanks for 30 minutes after boarding was complete.

We flew in first class. The crew did not offer drinks before the flight took off, but they treated us well during the flight. The food was excellent. There was actually too much food served, but it was nice to have all the options.

Update to handle the delay was very bad, crews no smiles or welcome or thanks. Don’t care attitude

Everything you need to know for your flight from Idaho Falls to Illinois

Information on your arrival and departure airports