$124 Find Cheap Flights from Illinois to Idaho - Compare and Save

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Cheap Flights from Illinois to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
Sort by: Cheapest
Boise
3h 48mNonstop
from $247per person
Idaho Falls
3h 50mNonstop
from $341per person
Hailey
4h 01mNonstop
from $491per person
Pocatello
6h 48m2 stops
from $550per person
Lewiston
7h 36m2 stops
from $1,014per person
Useful Info

Good to know

Low season

January

Cheapest flight

$124
Best time to beat the crowds with an average 19% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Chicago Midway Airport to Boise

FAQs for booking flights from Illinois to Idaho

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

    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 Illinois to Idaho.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to Idaho 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 Illinois to Idaho?

    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 Illinois to Idaho 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 Illinois to Idaho?

    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 Illinois to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines fly most frequently to Idaho?

    Illinois and Idaho are connected by different airlines. The airlines that fly that route the most regularly are American Airlines (20 flights per week), Air Canada (14 flights per week), and United Airlines (14 flights per week).

  • How many airports are there in Idaho?

    There are 6 airports in Idaho. The busiest airport is Boise Airport (BOI), with 80% of all flights arriving there.

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

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Idaho is Boise Air Term. Gowen Fld Airport (BOI), with an average flight price of $307.

  • What is the cheapest day to fly to Idaho?

    Based on KAYAK data, the cheapest day to fly to Idaho is Wednesday where round-trip tickets can be as cheap as $361. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $651 on average.

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

    The cheapest time of day to fly to Idaho is generally in the morning, when round-trip flights cost $407 on average. Morning departures are around 8% cheaper than evening flights, on average. The most expensive time of day to fly to Idaho is generally at night, which is peak travel time and where the average cost of a ticket is $564.

  • What is the cheapest flight to Idaho?

    The cheapest ticket to Idaho from Illinois found in the last 5 days was to Boise, at $309 round-trip. The most popular route is Chicago Midway Airport (MDW) to Boise (BOI) and the cheapest round-trip airline ticket found on this route in the last 5 days was $309.

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

    The cheapest month for flights from Illinois to Idaho is January, when tickets cost $209 (return) on average. On the other hand, the most expensive months are February and October, when the average cost of round-trip tickets is $319 and $310 respectively.

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

    To get a below average price on the flight from Illinois to Idaho, you should book around 7 weeks before departure, which saves you about 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

  • How many cities have direct flights to Idaho?

    From Illinois, there are direct flights to Idaho from 1 city. This city is Chicago and there are 72 direct flights each week.

  • How many direct flights to Idaho are there each day?

    There are around 11 direct flights from within Illinois to Idaho every day. Most flights (61%) depart in the morning.

  • How many direct flights to Idaho are there each week?

    Each week there are around 72 direct flights from within Illinois to Idaho. The most common day for departures is Friday, with 17% of flights taking off on this day.

  • How long is the flight to Idaho?

    An average nonstop flight from Illinois to Idaho takes 9h 21m, covering a distance of 1307 miles. The shortest route is Chicago O'Hare Intl Airport (ORD) to Jackson (JAC) with an average flight time of 3h 18m.

  • How many long-haul flights are there to Idaho each week?

    Each week, there are 28 medium-haul flights (3-6 hour flight duration) and 44 short-haul flights (up to 3 hour flight duration) to Idaho. There aren't any long-haul flights (6-12 hour flight duration).

  • What are the most popular destinations in Idaho?

    Based on KAYAK flight searches, the most popular destination is Boise (32% of total searches to Idaho). The next most popular destinations are Jackson (32%) and Spokane (28%). Searches for flights to Idaho Falls (7%), to West Yellowstone (1%) and to Twin Falls (0%) are also popular.

Reviews of the top 5 airlines serving from Illinois to Idaho

 
Need help choosing which airline to fly with from Illinois to Idaho? 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 4213 reviews
7.5Entertainment
8.1Boarding
7.0Food
8.6Crew
8.0Comfort
Airline reviews

Multiple delays due to weather in Chicago, but the crew did their best to get flights rescheduled and on to their destination. I felt like the crews handled a frustrating situation very well, kudos to them! I was very glad to not have a cancelled flight.

8.0 ExcellentEmmalee, Oct 2026
Read more Southwest reviews

Multiple delays due to weather in Chicago, but the crew did their best to get flights rescheduled and on to their destination. I felt like the crews handled a frustrating situation very well, kudos to them! I was very glad to not have a cancelled flight.

Southwest’s point to point system caused a 2 hour delay due to the crew being late from their inbound flight. Also, the WiFi and entertainment didn’t work on the plane.

A) Checked my luggage at the gate but never got to pre board B) if we are helping with checking our carryon and waiting 40 minutes for it we should have some privileges c) luggage took 40-45 minutes to come.. d) I asked for another snack and was told the plane is full.. seriously a small snack

I like the staff members they were super nice and helpful very sweet people :)

Boarding process of asking for volunteers to check bags goes against the system you had before with 2 bags checked free. This process is more of a guilt trip than a caring attitude toward the customer. In addition bag-size scrutiny has increased which also slows down the process of boarding. My wife said she will not fly on your airline again unless there is no other option.

Overall good, just screaming kids in the area the whole flight.

OKay. I sat in the back of the plane and it was really loud between babies and little kids, and adults who.like to talk a lot and loudly most of the flight.

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

I flew twice this week on Southwest, was delayed over 2 hours both ways. From Pittsburgh to Chicago it was due to weather but the gate agents, pilot etc were great at updating everyone. Today from Midway to Pittsburgh the plane had come from an international location, kept getting delayed, no information was given until we were delayed for the third time. It was ridiculous, whoever scheduled that plane to fly to Pittsburgh after didn’t consider a lot of things.

The staff was very friendly, professional, and courteous. The overall flight was a great experience.

Uneventful, which is perfection in airline travel. Everything happened as it should and when it should. Flight was short so no food. I could have used the App to watch something but took a nap.

Stop with the fake cheerfulness and the too often expressed sentiment that all you care about is our safety. Bull…. You use that as an excuse to keep us cowering in our seats. How about you go back to the old standby of telling the truth… like why you overbook, why you are delayed, why we don’t get vouchers for your screwups.

Healthier snack options in first class. Offer fruits, proteins, etc

Last minute change in gate to satellite N a bit of a hassle since I needed a wheelchair . Someone did come and get me to the gate but it was close. Then plane late. It’s hard on older passengers and families to have to trek from one gate to another.

Still seems like Alaska Airlines is not doing a very good job of anticipating the number of carry on’s going in the overhead bins. I was asked to check mine not to find out there was actually(surprisingly)enough room for my small luggage in the overhead bins. In the past, I’ve seen PLENTY of items in the overhead bins that should be underneath peoples seats.

It seems like most of the time theres no room for my allowed carry on bag. People are putting their things in the overhead compartment that belong under the seat in front of them. Getting tired of that!

The seats are too small/crowded. It is frustrating to be forced to sit with someone who is overweight as they crown the other seat. Nothing against the person…just the airline companies who continue(over decades!)to reduce seat sizes. Americans are fat. Those of us who are not are tired of being compromised by the airline companies who don’t faces that fact and make adjustments. Maybe have “overweight seats”? Maybe give us a discount for being forced into an uncomfortable flight due to others overweightness? Please, make adjustments…be accountable. Thanks!

The crew was great and everything went smoothly coming and going.

No outlets, plugs, way to charge the phone or service and no food on one leg o the trip, but other than that, great. Loved WIFI, the flight, the crew, the pilots, the schedule, etc. Great job. My new favorite airline!

Wonderful as always! Pleasant staff, smooth ride, and timely departure.

I'm 6' 2" and even in economy plenty of leg room

Horrible experience. Delta delayed the flight to 11pm which happens. Apparently the pilots were there but we were waiting for flight attendants to arrive from Detroit and they were delayed. They could have made arrangements but that’s fine. What was truly horrible was that at 10:50pm the pilot comes out and says the flight will be cancelled but hasn’t been cancelled yet in the system. It’s being cancelled because the pilots have timed out. As soon as that plane got delayed past 10:50pm delta knew it couldn’t fly. Yet they made us wait around for hours. When the flight finally got cancelled all the area hotels were booked and flights for the next day were unavailable until midday. All I wanted was to spend one day with my family before needing to fly abroad on another delta flight. That will be my last flight with them. I’ll take my 800k miles flown and annual spend to an airline that isn’t so thoughtless.

THI IS THE 3RD CONSECUTIVE FLIGHT FROM ORD TO MSP THAT HAS BEEN DELAYED 2+ HOURS. CRAZY

The plane was a rather tired 737-800, with old style small luggage bins. Poor air flow. USB charger in the infotainment system was not functioning. The flight was 2 hours late due to crew rest requirements (not their fault). On arrival in Seattle, waited on the tarmac for 30 minutes with very few updates from the crew.

I missed the flight because the Minneapolis flight was 49 minutes LATE, and the Boise flight LEFT 24 minutes EARLY!

The crew was very inconsiderate and rude. My flight was scheduled to depart at 6:00am. I received a call from the crew at 5:40am, asking if I was going to make the flight because I was the only one that hasn't boarded yet and boarding ends at 5:50am. I let them know that I will be at the gate in a few minutes, before the 5:50am cutoff. When I arrived at the gate at 5:45am the gate was closed. Departing early on last minute notice without having all passengers on board is inconsiderate and unprofessional.

Very easy to use and convenient, you can perform any action within the same portal

Okay considering we had weather delays which the Pilot notified us of immediately!

The boarding was organized and informative but the plane was tight meaning that you were sitting on one another and extremely uncomfortable. It’s disappointing that can’t have common seating comfort on the plane.

Having to up charge for a seat assignment is not good. Delta can do better

Price was crazy watch it if you Chan he your flight

On time, easy boarding. Anytime you sit in an economy seat, it’s uncomfortable. New plane and the bathrooms were in the galley at the back of the plane which seemed odd.

Terrible service - they don’t want to be there and bad food. Entertainment system in economy from the 2000s

No drink service but there was no N/A as an option to choose. Seats were extremely tight. I am under 5.5 and I bumped my knees have no idea how taller people could manage.

Flight delayed, last seat on the plane, no arrival Gate available due to the plane departing late

Kayak booked this flight with only 1h 20min layover in Chicago. This made it impossible for me and several other passengers to reach this flight. Moreover, the gate closed boarding in spite of several passengers still on their way without waiting even one more minute. However, the plane departed with 20min (!) delay, i.e., there would have been at least 15 min time to let the delayed passengers board without causing any delays. I complained and as a "thank you" the attendent booked us on the last (!) flight to Indianapolis ~7h later! Thankfully, I caught the spitefulness and the United customer line rebooked the flight to an earlier flight. Although I can't grade this particular flight since I never had a chance to take it, Kayak made the mistake of a too short layover and the crew at the gate was awful.

Flight did not have wifi service. It was experiencing technical difficulties. Definitely and old plane that needs updating.

Old 757 with poor entertainment system. United no longer partners with United for free text and email. O'Hara an absolute disaster! Limited gates clauses two hour delay. Unfortunately this appears to be the norm.

It was a good experience, unfortunately my checked baggages were come late and not arrived on time.

Very stressful to locate United Airline boarding area, delayed flight, changing boarding area again to another location with all tiredness 😩. But flying was fine.

First class snacks - stewardess gave out multiples to everyone until there was almost no selection left when she got back to me last in first class cabin. Nothing left that I would eat.

My feedback from the trip to Columbia to Chicago was meant for Chicago to Denver.

The WiFi was out gr entire flight. Had to Diane for almost 1 hour to wait for a gate to open up for plane to dock. Very bad experience.

DELAYED AGAIN and AGAIN and AGAIN - not only that, you delay in 20 minute increments for hours and hours instead of having an accurate delay understanding.

AA was fine....the overall experience was subpar, but not due to the airline due to broader issues

No ground air conditioner for the plane. Very hot and humid prior to take off which was an uncomfortable period of time.

Check-in process was poor, very poor, only one person to check-in all passengers, so if one passenger had a check-in issue, all other passengers were delayed. All check-ins should have two airline staff to check-in passengers.

The flight up was great no issues. The flight back home was a cluster. I was told the plane I was waiting on was giving to another flight which caused me to miss my connection flight. Granted the airline did great with getting hotel and vouchr for food.

Flight delays for communication overall not a good experience uncomfortable on the plane. Person in front of me reclined his seat, putting them inches from my lap.

the plane was so hot!! the air-conditioning was barely blowing. The flight was delayed, and we had to sit on the hot plane before take off for an extended amount of time, waiting on international passengers. Would not have been so bad if it was not so hot. They said it would get better after take off, but it did not.

More options for your flight to Idaho

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