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Find cheap flights from Idaho Falls to Illinois from $260

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 8/9. 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
0 bags
Sat 6/1
Sat 6/8

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Best Illinois Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Chicago
Chicago1 stop$408
Moline
Moline1 stop$408
St. Louis
St. Louis1 stop$562

Good to know

Low season

December

High season

August

Cheapest flight

$260
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly and prices are also 19% lower on average.
Flight from Idaho Falls to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Idaho Falls 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 Idaho Falls to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Illinois from Idaho Falls 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 Idaho Falls 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 to Illinois with an airline and back to Idaho Falls with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Idaho Falls 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 to Illinois from Idaho Falls up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Illinois

  • Morning departure is around 11% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top airlines flying from Idaho Falls to Illinois

 
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.
7.3
United AirlinesOverall score based on 11143 reviews
7.2Comfort
7.1Entertainment
7.7Boarding
8.1Crew
6.7Food
Airline reviews

I was told we'd have a hot breakfast option in first class, so I chose not get a hot breakfast. It was a very strange meal, but the fresh fruit was very good quality. Service was excellent from ORD to ELP. No service from MBS to ORD, not even water. However, when flying American from FNT to ORD, which is a shorter flight, they at least pass out snacks and offer water.

8.0 ExcellentMichelle, Apr 2024MBS - ORD
Read more about United Airlines reviews

I was told we'd have a hot breakfast option in first class, so I chose not get a hot breakfast. It was a very strange meal, but the fresh fruit was very good quality. Service was excellent from ORD to ELP. No service from MBS to ORD, not even water. However, when flying American from FNT to ORD, which is a shorter flight, they at least pass out snacks and offer water.

The delays (5 hrs) were a comedy of errors, and the multiple safety issues encountered were very concerning.

The flight was delayed instead of leaving at 11 it left at 12.20

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

Good movies, iffy pay WiFi, food ok- on time though and that was great!

Awful…flight was delayed more than 12hrs, missed all connections to Fort Wayne, IN, had to get flight to another city 2 hours from my destination, flight was again delayed by 40 mins because they did not have enough fuel, again missed a connection, finally arrived in Indiana at 11pm…but before my 2 hour drive home, ay, no Five That Our Luggage Never Made On The plane and Still In Chicago

Boarding was friendly and quick. While the plane model was older with no live tv, the entertainment was full of movies and tv shows. All food was available. Pilots were very communicative with status of the flight. Flight landed on time.

Flight was delayed by over an hour and gate checked bags took 15 minutes to be delivered to the jet bridge.

The Palm Springs to Chicago O’Hare was on Time and Palm Springs airport is easier navigate. As our connection was only an approximately 50 minutes, we asked staff for insights for the Chicago airport in terms of transferring into the other terminal from which our flight left, and they were unhelpful. However, the United App was very helpful in terms of notifications and even providing directions. The Chicago to Detroit flight was significantly delayed which we all know does happen. However, there were very few updates or notifications as to why this was happening when we would actually arrive. It took nearly 30 minutes for bags to make it to baggage claim. We arrived nearly 1 hour late on a 40 minute flight.

Flight cancelled due to fog. No other flights available for 36 hours. Directed by United to book passage on another carrier, and submit receipts for reimbursement. Did that. United now states they will not reimburse. Currently out 2 grand.

This flight is frequently delayed. The connections seemingly are more frequently delayed. I’ve missed connections as a result twice on the same route to charlotte then Charleston. Final destination arrival has been the next day, twice in a row. No pilots, no crew. Too many excuses. Unfortunately, my days with American are over.

Entertainment was okay not because anything was wrong but it is a short flight so having no wifi is annoying but understandable. Crew was outstanding as usual

Those seats were way too narrow. I had the middle seat, one person was a very skinny person and we still couldn’t avoid touching each other anytime one of us moved. The other person was larger and we were basically sitting in each others lap the entire flight. There was zero entertainment. The flight was long enough to justify tvs, but no. Gotta sit there in your infant seat and twiddle your thumbs.

Flight was fine. It took an unusually long time to have baggage delivered to the carousel in ORD.

Average - flew with Jet Blue internal and it was far more comfortable and better food and entertainment. Notable difference

The flight got canceled due to mechanical issues, and he to be rebooked and missed my appointments for that day

The flight was scheduled to depart DCA at 12:30 pm but was delayed twice on the ground so that we were finally scheduled to depart at around 4:00 pm. Once we boarded, it was announced that takeoff would be delayed again to fix a hydraulic problem which delayed our eventual takeoff until around 5:00 pm. Once we departed, it was a smooth flight back to ORD. We did not get any explanation about what caused the original significant delay. In my experience, this happens frequently with AA.

The only problem experienced was a ground stop in Chicago due to weather. But the crew handled everything professionally. They prioritized rebooking those passengers who had connecting flights and then deplaning the other passengers. When the hold was lifted, they efficiently re-boarded all the passengers so that we could depart before our departure limit expired.

Our second leg to Jackson WY was unable to land due to weather. We were flown back to Dallas after stopping in SLC. We were given hotel rooms and vouchers. We were told that we would be back on the same plane in the morning. Instead we were given a different flight with different seats. Not a good experience. No one knew what was going on.

Turn on the heat. Flight was way too cold from Arizona to Chicago.

Book cheap flights from Idaho Falls to Illinois

Recent round-trip flight deals

8/20Tue
1 stopUnited Airlines
5h 46mIDA-MLI
8/24Sat
2 stopsUnited Airlines
11h 23mMLI-IDA
$408
5/21Tue
1 stopAmerican Airlines
9h 20mIDA-ORD
6/1Sat
1 stopAmerican Airlines
6h 20mORD-IDA
$408
7/11Thu
2 stopsDelta
11h 32mIDA-ORD
7/14Sun
1 stopDelta
5h 38mORD-IDA
$413
8/20Tue
2 stopsUnited Airlines
9h 02mIDA-MLI
8/24Sat
2 stopsUnited Airlines
7h 14mMLI-IDA
$413
7/12Fri
1 stopDelta
5h 31mIDA-ORD
7/14Sun
1 stopDelta
5h 38mORD-IDA
$438
8/20Tue
1 stopUnited Airlines
5h 46mIDA-MLI
8/24Sat
1 stopUnited Airlines
5h 32mMLI-IDA
$448
8/20Tue
1 stopUnited Airlines
5h 46mIDA-MLI
8/24Sat
1 stopUnited Airlines
5h 32mMLI-IDA
$452
5/30Thu
1 stopAlaska Airlines
7h 27mIDA-STL
6/6Thu
1 stopAlaska Airlines
10h 21mSTL-IDA
$562
5/19Sun
2 stopsAlaska Airlines
12h 08mIDA-ORD
5/27Mon
2 stopsAlaska Airlines
16h 57mORD-IDA
$643
8/7Wed
2 stopsAmerican Airlines
12h 16mIDA-STL
8/9Fri
2 stopsAmerican Airlines
15h 59mSTL-IDA
$768

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Recent one-way flight deals

8/9Fri
1 stopDelta
7h 51mIDA-ORD
$260
6/28Fri
1 stopAlaska Airlines
11h 38mIDA-ORD
$337
6/28Fri
2 stopsAlaska Airlines
12h 13mIDA-ORD
$341
8/9Fri
2 stopsUnited Airlines
18h 02mIDA-ORD
$400

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Last minute flights from Idaho Falls to Illinois

Last minute flight, train and bus deals

5/4Sat
multi-stopAlaska Airlines
7h 28mIDA-STL
5/7Tue
multi-stopAlaska Airlines
8h 51mSTL-IDA
$754
5/6Mon
multi-stopAmerican Airlines
8h 45mIDA-ORD
5/8Wed
multi-stopAmerican Airlines
6h 20mORD-IDA
$754
5/6Mon
multi-stopAmerican Airlines
8h 45mIDA-ORD
5/8Wed
multi-stopAmerican Airlines
6h 20mORD-IDA
$759
5/4Sat
multi-stopDelta
6h 45mIDA-STL
5/7Tue
multi-stopDelta
10h 58mSTL-IDA
$764
5/6Mon
multi-stopDelta
5h 06mIDA-ORD
5/8Wed
multi-stopDelta
11h 13mORD-IDA
$764
5/4Sat
multi-stopDelta
9h 44mIDA-STL
5/7Tue
multi-stopDelta
10h 05mSTL-IDA
$769
5/4Sat
multi-stopAlaska Airlines
7h 28mIDA-STL
5/7Tue
multi-stopAlaska Airlines
8h 51mSTL-IDA
$814
5/4Sat
multi-stopDelta
7h 18mIDA-STL
5/7Tue
multi-stopDelta
5h 28mSTL-IDA
$819
5/4Sat
multi-stopDelta
7h 18mIDA-STL
5/7Tue
multi-stopDelta
10h 58mSTL-IDA
$824
5/6Mon
multi-stopDelta
12h 19mIDA-ORD
5/8Wed
multi-stopDelta
11h 13mORD-IDA
$936

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Idaho Falls - Illinois Flights

Departure:

Idaho Falls (IDA)United States

Return flight deals:

Illinois - Idaho Falls

Cabin classes: