$78 Find Cheap Flights from Idaho to Illinois

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Low seasonJanuary
High seasonMay
Cheapest flight$78
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 10% lower on average.
Flight from Boise to Chicago Midway Airport

FAQs for booking flights from Idaho to Illinois

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Idaho 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 Idaho 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 Idaho 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 Idaho 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 Idaho to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in Illinois?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Illinois is Chicago Midway Airport (MDW), with an average flight price of $189.

  • What is the cheapest day to fly to Illinois?

    Based on KAYAK data, the cheapest day to fly to Illinois is Saturday where round-trip tickets can be as cheap as $685. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $1,000 on average.

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

    The cheapest time of day to fly to Illinois is generally at night, when round-trip flights cost $306 on average. Morning departures are around 88% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the morning, which is peak travel time and where the average cost of a ticket is $822.

  • What is the cheapest flight to Illinois?

    The cheapest ticket to Illinois from Idaho found in the last 72 hours was to Chicago Midway Airport, at $249 round-trip. The most popular route is Boise (BOI) to Chicago Midway Airport (MDW) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $249.

  • What is the cheapest month to fly from Idaho to Illinois?

    The cheapest month for flights from Idaho to Illinois is February, when tickets cost $300 (return) on average. On the other hand, the most expensive months are November and March, when the average cost of round-trip tickets is $573 and $489 respectively.

  • How far in advance should I book a flight from Idaho to Illinois?

    To get a below average price on the flight from Idaho to Illinois, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

  • How long is the flight to Illinois?

    An average nonstop flight from Idaho to Illinois takes 9h 45m, covering a distance of 1359 miles. The shortest route is Jackson (JAC) to Chicago O'Hare Intl Airport (ORD) with an average flight time of 3h 06m.

  • What are the most popular destinations in Illinois?

    Based on KAYAK flight searches, the most popular destination is Chicago (85% of total searches to Illinois). The next most popular destinations are St. Louis (9%) and Peoria (3%). Searches for flights to Moline (2%), to Bloomington (1%) and to Springfield (1%) are also popular.

Top 5 airlines serving from Idaho to Illinois

Need help choosing which airline to fly with from Idaho 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.
8.0
SouthwestOverall score based on 4294 reviews
8.2Boarding
8.0Comfort
7.1Food
7.6Entertainment
8.6Crew
Airline reviews

It is southwest seat was ok. Not the most comfortable seat

8.0 ExcellentJohn, Apr 2025PVD - FLL
Read more Southwest reviews

It is southwest seat was ok. Not the most comfortable seat

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

Plz don't take away free bags and free seating

The seats were a bit cramped and worn, but otherwise okay.

I would have liked to arrive on time - not 5 hours late!

After a 3 hour layover in Denver my flight was delayed over 5 hours! No explanation; no assistance; no offer to provide compensation; no one at Southwest was willing to offer any assistance. 8 hours in the Denver airport - ridiculous!

It was a perfect flight in all aspects! Both legs!

Only one drink pass through the cabin for a 4 hour flight. Quite rough and bumpy landing.

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Delta is my preferred airline. I've traveled with them for years. On time in most cases, good communication, easy to use app. Most planes are pretty nice. I was on a CRJ 700/900 however, which was pretty badly aged inside and needed a refresh. No infotainment, unreliable wifi, best to download before boarding or bring a book. Food choices are really just snacks on this flight, nice variety but about what you'd expect. Great staff and prompt in departure and early arrival too. Overall quite satisfied.

Crew was friendly Love the entertainment in the seat head rest.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

There's just no way to sit fully upright and comfortably in these seats. There needs to be 2 more inches of room, and that's not something that only one person on the flight needs - the whole flight needs 2 more inches of room. If that means you sell 6 less seats, so be it. It's too close for anyone. Forcing people to pay for "premium" economy just to get "barely enough space to breathe" isn't really an answer to that.

The crew were very nice. The Chocolate is good and v there’s no entertainment. Thanks

The crew were very nice. I would have appreciated a pillow for comfort. I had a special meal that was sloppy, but the salad was great. Thanks

The plane was in Moline all night. Consequently, we assumed an on time departure at 8:15am. Unfortunately, and as is the normal case with United in Moline, we departed 2.5 hours late. When the crew came, it was discovered that there was very little heat in the plane. Seems this should have been checked hours before the crew arrived. Then when we boarded and the plane was to be de-iced, the United de-icing truck was not working! We awaited the American Airlines truck. All of this caused us to miss our connection in Chicago. My suggestion is never take United Airlines flight from Moline. We have been disappointed 80% of the time and have vowed to not take United again from Moline.

Flight was delayed two hours. No snacks and no tv screens. My bag got stuck in Chicago

The aircrew was solid, the flight was chill, I had no issues. The gate agent was not the best. I was trying to use a military bag upgrade to move my bag from under the seat to the overhead bins and he told me there’s no overhead bins on the plane, argued with me why booking put a military member in basic economy (I don’t really understand this) and made it an issue to even try to help me stating I’d have to call reservations to get a bag upgrade. When every other agent with United can add it at the gate, this man couldn’t be bothered.

They canceled our flight and left us stranded to figure it out

Everything was very good. Was able to change a make run flight leaving on direct earlier in the app -seamless!!! Well done

To start, I’d like to say that every American Airline personnel I interacted with on the ground, especially flight crew, was very friendly and did their best to help me out. Despite this, however, my experience with the airline was an entire mess. The 7:19 PM flight was heavily delayed due to weather, and pushed to 10:30 AM the next morning. Because of this, I had to spend the night inside of the airport. At some point later in the night, I got an email saying that the flight had been canceled. I called the support number, and the representative on the other line told me that the flight was still on and that I didn’t need to rebook. The next morning, no one came to the gate to open the door for the crew until almost 11 AM. By this time the flight crew had been waiting for over an hour, and they had called management to get someone to open the door for them multiple times. Around 11:30, the gate screen had changed to a different flight. I ended up buying a last minute ticket with Southwest airline just to get to Chicago, because the next flight with American wasn’t until 7:19 pm that day. Now, earlier that morning my suitcase had been sent ahead of me to ORD. I went to baggage claim to ask them if I could have my suitcase forwarded to where I was staying. The representative at SDF baggage claim said they could and put the claim in for me. As I was going back through TSA, I got an email that the airline had found my suitcase, but the next step was to send it BACK to SDF. I called the airline support number again, and I made it clear that my suitcase needed to stay in Chicago and to not come back to SDF. The representative told me that they would hold my suitcase at ORD and that it wasn’t going to be forwarded anywhere. Once I got there, I found that they had loaded my suitcase onto a plane to send it back to SDF. Thankfully, I had gotten to the baggage claim counter in time for them to put in a request to bring my suitcase back up. My refund with the airline is processing already, but because of this entire experience and miscommunication at every turn of the way, I will not book with American Airlines in the future.

The plane was late and then sat on the runway for almost 45 minutes before taking off.

Crew professional. Easy bag drop off. On time. Good entertainment.

Everything was great. Boarding, early departure, early arrival, and deplaning were smooth. Smooth flight.

Per usual, flight status, staff courtesy and professionalism were excellent

Everything was on time, we arrived early, everything worked well.

The only thing is if Wi-Fi is available after you land and taxi to the gate. It takes forever to get to the gate, and having the Wi-Fi continue would be great to bide the time at least 5 minutes before you arrive at the entrance. That is my only comment; otherwise, everything was good.

Had to wait on pilot and crew to depart and had to wait to arrive at the gate because they only had 2 crews working. Delays, delays....Planes just keep getting smaller and tighter and they nickle and dime for everything. When will an airline actually wake up and make flying more enjoyable?

Seating was horrible. Small seats. Access to flight information and extras very iser unfriendly. Kept losing internet after paying for it. Staff in madison was as unprofessional and unhelpful.

Delayed due to no crew. On a major holiday travel day.

I mean, it’s Spirit. But it was frustrating to have our flight canceled, get bumped to a later flight, and then Spirit was unwilling to check our bag until 4 hours before our flight… tell us we could not sit in the waiting area’s chairs… and really negative experience getting checked in and dropping the bag.

Not having it be changed after we bought the flight tickets from a direct flight getting in at a reasonable time to a connecting flight red eye of 9 hours, so that we would lose our 35 dollars in nonrefundable insurance would've been great! Our country really does need low-cost carrier options, but this type of "service" ain't it. Fortunately, had a little better success with them flying to and from San Juan PR last month at least.

All was good expecting the seats need a bit of cushion. Besides that I can’t complain.

You get what you pay for, and the flights went smoothly. There’s no reclining chairs, no screens, And there isn’t always wifi, but the plane was clean and staff was friendly and the takeoff/landing were smooth.

The only positive is that the flight made it both ways. Getting charged for every little thing after the cost of the ticket itself is comical, considering how the plane and services are as bottom-tier as possible. The self check-in kiosks are useless. It’s nice to think that you can print your boarding pass, tag your checked bag, and then just drop it off. But no, they still make you go through the line once you finish- what’s the point of the self check-in then? Any questions for the staff seem like the biggest inconvenience and were met with condescending responses. This was my first and now last time ever flying with Spirit. After all the extra costs, subpar plane and staff, I see no value. I’d rather drive the 13 hours than give Spirit another dime.

The flight was fine however what started as a reasonable priced ticket could have become an overpriced ticket with additional charge for carry on as well as checked bag $79 per bag per person each way. Additional charge for choosing one’s seat, additional charge for beverage and snack, we were on what was described as a new plane yet there were no audio/visual on the jet. A bare bones service but not at a bare bones price. Will think twice before flying Spirit again. 😕

terrible service, no room for a dog underfoot, a broken chair that is impossible to sit on and all this costs a lot of money

Terrible-extreme delay with very little communication, plane was overfull, luggage was returned on baggage claim in filthy condition.

Lower cost is the reason to fly Spirit. Should give free baggage with credit card.

Very difficult. Flew out on Dec 24th and it was a mess. They know it is going to be the busiest time of the year and they had no organization. Finally they called for people going on certiam flights so they could get them thru thw line then we had to rush to our gate to get in li e to board.We missed our flight do to being stuck at the border of Mexico. They would not work with us to make an affordable price so we had to wait a day with no where to go and pay 280 more for our flights. I would think that a complimentary drink would be nice. But we had to pay 4.49 for a coke. Not an overall good experience

Book cheap flights from Idaho to Illinois

Recent round-trip flight deals

5/20Tue
1 stopAlaska Airlines
9h 34mBOI-ORD
5/31Sat
1 stopAlaska Airlines
9h 05mORD-BOI
$174
6/10Tue
1 stopDelta
9h 01mBOI-MDW
6/17Tue
1 stopDelta
5h 34mMDW-BOI
$175
9/4Thu
nonstopUnited Airlines
3h 43mGEG-ORD
9/8Mon
nonstopUnited Airlines
4h 12mORD-GEG
$179
5/20Tue
1 stopUnited Airlines
9h 14mBOI-ORD
5/24Sat
nonstopUnited Airlines
3h 58mORD-BOI
$201
6/12Thu
1 stopSouthwest
10h 40mGEG-MDW
6/16Mon
1 stopSouthwest
8h 15mMDW-GEG
$236
9/12Fri
1 stopSouthwest
6h 30mBOI-MDW
9/14Sun
1 stopSouthwest
5h 25mMDW-BOI
$240
10/6Mon
nonstopAmerican Airlines
3h 41mGEG-ORD
10/11Sat
nonstopAmerican Airlines
3h 50mORD-GEG
$250
6/10Tue
nonstopAmerican Airlines
3h 37mBOI-ORD
6/17Tue
nonstopAmerican Airlines
3h 59mORD-BOI
$255
5/12Mon
1 stopSpirit Airlines
21h 39mBOI-ORD
5/28Wed
3 stopsSpirit Airlines
41h 22mORD-BOI
$376
10/2Thu
2 stopsSpirit Airlines
23h 39mBOI-ORD
10/6Mon
2 stopsSpirit Airlines
15h 44mORD-BOI
$405

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Recent one-way flight deals

8/14Thu
nonstopSouthwest
3h 25mBOI-MDW
$78
8/13Wed
nonstopUnited Airlines
3h 26mBOI-ORD
$78
9/23Tue
1 stopAlaska Airlines
9h 17mBOI-ORD
$87
5/31Sat
1 stopDelta
6h 55mBOI-MDW
$88
5/30Fri
1 stopDelta
7h 50mBOI-ORD
$88
5/31Sat
1 stopAlaska Airlines
8h 14mGEG-ORD
$97
10/8Wed
nonstopAmerican Airlines
3h 37mBOI-ORD
$130
6/10Tue
nonstopAmerican Airlines
3h 44mGEG-ORD
$130
6/2Mon
2 stopsSpirit Airlines
22h 20mBOI-ORD
$132
6/9Mon
2 stopsSpirit Airlines
22h 34mBOI-ORD
$154

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Last minute flights from Idaho to Illinois

Last minute flight, train and bus deals

5/2Fri
multi-stopDelta
7h 37mGEG-MDW
5/6Tue
multi-stopDelta
6h 56mMDW-GEG
$317
5/2Fri
multi-stopDelta
8h 04mGEG-ORD
5/6Tue
multi-stopDelta
6h 35mORD-GEG
$317
5/2Fri
multi-stopDelta
11h 15mGEG-MDW
5/7Wed
multi-stopDelta
5h 26mMDW-GEG
$322
5/2Fri
multi-stopUnited Airlines
8h 27mBOI-ORD
5/5Mon
nonstopUnited Airlines
4h 08mORD-BOI
$377
5/5Mon
multi-stopSouthwest
7h 20mGEG-ORD
5/7Wed
multi-stopSouthwest
11h 05mORD-GEG
$415
5/1Thu
multi-stopSouthwest
8h 00mBOI-ORD
5/5Mon
multi-stopSouthwest
11h 00mORD-BOI
$448
5/1Thu
multi-stopUnited Airlines
9h 24mBOI-ORD
5/2Fri
nonstopUnited Airlines
4h 08mORD-BOI
$457
5/1Thu
multi-stopAmerican Airlines
7h 22mJAC-ORD
5/4Sun
multi-stopAmerican Airlines
7h 13mORD-JAC
$529
5/2Fri
multi-stopSpirit Airlines
21h 29mBOI-ORD
5/4Sun
multi-stopSpirit Airlines
30h 47mORD-BOI
$787
5/1Thu
multi-stopAmerican Airlines
9h 45mIDA-ORD
5/3Sat
multi-stopAmerican Airlines
13h 15mORD-IDA
$1,221

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Everything you need to know for your flight to Illinois

Cabin class types available on flights to Idaho

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