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Cheap flights from Illinois to Idaho Falls from $118

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Idaho Falls departing on 10/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Illinois to Idaho Falls

Cheap round-trip flights

Delta Logo
6:25 pm - 10:27 pmORD-IDA
5h 02m1 stop
Delta Logo
3:00 pm - 9:00 pmIDA-ORD
5h 00m1 stop
$237Delta
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Sat, Sep 6 - Tue, Sep 9
Alaska Airlines Logo
8:00 am - 3:13 pmORD-IDA
8h 13m1 stop
Alaska Airlines Logo
3:50 pm - 12:24 amIDA-ORD
7h 34m1 stop
$251Alaska Airlines
Find Deal
Fri, Nov 7 - Mon, Nov 10
Logo
6:00 am - 11:46 amORD-IDA
6h 46m1 stop
Logo
9:39 pm - 1:09 pmIDA-ORD
14h 30m2 stops
$295
Find Deal
Mon, Sep 1 - Mon, Sep 8
American Airlines Logo
10:32 am - 1:00 pmORD-IDA
3h 28mnonstop
American Airlines Logo
12:46 pm - 4:58 pmIDA-ORD
3h 12mnonstop
$311American Airlines
Find Deal
Tue, Aug 26 - Thu, Aug 28
American Airlines Logo
1:20 pm - 9:25 pmORD-IDA
9h 05m1 stop
American Airlines Logo
12:54 pm - 5:08 pmIDA-ORD
3h 14mnonstop
$321American Airlines
Find Deal
Tue, Sep 16 - Fri, Sep 19
Logo
6:00 am - 11:46 amORD-IDA
6h 46m1 stop
Logo
9:39 pm - 10:48 pmIDA-ORD
24h 09m3 stops
$323
Find Deal
Mon, Sep 1 - Mon, Sep 8
United Airlines Logo
5:15 am - 9:47 amSTL-IDA
5h 32m1 stop
United Airlines Logo
2:35 pm - 8:46 pmIDA-STL
5h 11m1 stop
$325United Airlines
Find Deal
Sun, Aug 24 - Wed, Aug 27
Hawaiian Airlines Logo
6:20 am - 3:20 pmORD-IDA
10h 00m1 stop
Hawaiian Airlines Logo
3:57 pm - 12:03 amIDA-ORD
7h 06m1 stop
$341Hawaiian Airlines
Find Deal
Tue, Sep 9 - Tue, Sep 16
Hawaiian Airlines Logo
3:35 pm - 10:39 pmSTL-IDA
8h 04m1 stop
Hawaiian Airlines Logo
6:13 am - 2:39 pmIDA-STL
7h 26m1 stop
$341Hawaiian Airlines
Find Deal
Sat, Sep 27 - Wed, Oct 1
United Airlines Logo
10:56 am - 3:11 pmORD-IDA
5h 15m1 stop
United Airlines Logo
4:15 pm - 11:59 pmIDA-ORD
6h 44m1 stop
$349United Airlines
Find Deal
Sat, Sep 6 - Thu, Sep 11

American Airlines flights from Illinois to Idaho Falls

Our best American Airlines deals on Illinois to Idaho Falls flight tickets
American Airlines
Aug 26
ORD10:32 amChicago O'Hare Intl
3h 28m
IDA1:00 pmIdaho Falls Fanning Field
Aug 28
IDA12:46 pmIdaho Falls Fanning Field
3h 12m
ORD4:58 pmChicago O'Hare Intl
$311
Find similar
American Airlines
Sep 16
ORD1:20 pmChicago O'Hare Intl
9h 05m
1 stop
IDA9:25 pmIdaho Falls Fanning Field
Sep 19
IDA12:54 pmIdaho Falls Fanning Field
3h 14m
ORD5:08 pmChicago O'Hare Intl
$321
Find similar
American Airlines
Sep 27
PIA6:00 amGreater Peoria
7h 24m
1 stop
IDA12:24 pmIdaho Falls Fanning Field
Oct 1
IDA1:35 pmIdaho Falls Fanning Field
8h 48m
1 stop
PIA11:23 pmGreater Peoria
$339
Find similar

United Airlines flights from Illinois to Idaho Falls

Our best United Airlines deals on Illinois to Idaho Falls flight tickets
United Airlines
Aug 24
STL5:15 amLambert-St Louis
5h 32m
1 stop
IDA9:47 amIdaho Falls Fanning Field
Aug 27
IDA2:35 pmIdaho Falls Fanning Field
5h 11m
1 stop
STL8:46 pmLambert-St Louis
$325
Find similar
United Airlines
Sep 6
ORD10:56 amChicago O'Hare Intl
5h 15m
1 stop
IDA3:11 pmIdaho Falls Fanning Field
Sep 11
IDA4:15 pmIdaho Falls Fanning Field
6h 44m
1 stop
ORD11:59 pmChicago O'Hare Intl
$349
Find similar
United Airlines
Aug 12
ORD5:00 amChicago O'Hare Intl
5h 44m
1 stop
IDA9:44 amIdaho Falls Fanning Field
Aug 19
IDA4:00 pmIdaho Falls Fanning Field
6h 59m
1 stop
ORD11:59 pmChicago O'Hare Intl
$350
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Idaho Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 4, 2025.
Use the filters below to find and compare flights from Illinois to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 9/6

6:25 pm-10:27 pm

1 stop5h 02m

Idaho Falls Fanning Field

Tue 9/9

3:00 pm-9:00 pm

1 stop5h 00m

$237

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Fri 11/7

8:00 am-3:13 pm

1 stop8h 13m

Idaho Falls Fanning Field

Mon 11/10

3:50 pm-12:24 am

1 stop7h 34m

$251

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Mon 9/1

6:00 am-11:46 am

1 stop6h 46m

Idaho Falls Fanning Field

Mon 9/8

9:39 pm-1:09 pm

2 stops14h 30m

$295

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Tue 8/26

10:32 am-1:00 pm

Nonstop3h 28m

Idaho Falls Fanning Field

Thu 8/28

12:46 pm-4:58 pm

Nonstop3h 12m

$311

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Tue 9/16

1:20 pm-9:25 pm

1 stop9h 05m

Idaho Falls Fanning Field

Fri 9/19

12:54 pm-5:08 pm

Nonstop3h 14m

$321

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Mon 9/1

6:00 am-11:46 am

1 stop6h 46m

Idaho Falls Fanning Field

Mon 9/8

9:39 pm-10:48 pm

3 stops24h 09m

$323

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Sun 8/24

5:15 am-9:47 am

1 stop5h 32m

Idaho Falls Fanning Field

Wed 8/27

2:35 pm-8:46 pm

1 stop5h 11m

$325

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Tue 9/9

6:20 am-3:20 pm

1 stop10h 00m

Idaho Falls Fanning Field

Tue 9/16

3:57 pm-12:03 am

1 stop7h 06m

$341

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Sat 9/27

3:35 pm-10:39 pm

1 stop8h 04m

Idaho Falls Fanning Field

Wed 10/1

6:13 am-2:39 pm

1 stop7h 26m

$341

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 9/6

10:56 am-3:11 pm

1 stop5h 15m

Idaho Falls Fanning Field

Thu 9/11

4:15 pm-11:59 pm

1 stop6h 44m

$349

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Idaho Falls from

How to get the cheapest flight ticket from Illinois to Idaho Falls

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Idaho Falls?

If you aren’t able to travel to Idaho Falls during the month of March, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $323.

What is the cheapest day to depart on your flight to Idaho Falls?

Our data shows that Saturday is the least expensive day to fly to Idaho Falls. Tickets to fly out on this day can be as low as $323. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Thursday is $391.

What is the cheapest time of day to depart on your flight to Idaho Falls?

Our most recent data shows that the best time of day to fly to Idaho Falls is in the morning. Flights from Illinois to Idaho Falls during this time can be as low as $355. Try not to purchase tickets at noon because they tend to be around $586. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Illinois to Idaho Falls Fanning Field flight route?

Fly from Chicago O'Hare Intl to Idaho Falls Fanning Field for the best Illinois - Idaho Falls Fanning Field flight prices

What cabin class options are available on Illinois to Idaho Falls Fanning Field flights?

There are 1 cabin classes available to choose from on Illinois to Idaho Falls Fanning Field flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Illinois to Idaho Falls flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Idaho Falls

Best Price Found

$118

Fastest flight time

3h 28m

Direct flights

Every day

Airports in Idaho Falls

1 airport
The best one-way flight to Idaho Falls from Illinois in the past 72 hours is $118. The best round-trip flight deal from Illinois to Idaho Falls found on momondo in the last 72 hours is $237.
The fastest flight from Illinois to Idaho Falls takes 3h 28m
Direct flights go from Illinois to Idaho Falls every day.
There is 1 airport near Idaho Falls: Idaho Falls Fanning Field (IDA)
Search flight deals

  • When did momondo last update prices for flights from Illinois to Idaho Falls Fanning Field Airport?

    Prices for flights from Illinois to Idaho Falls Fanning Field Airport were last updated today.

  • How many operators does momondo search for flights from Illinois to Idaho Falls Fanning Field Airport?

  • How old do you have to be to fly from Illinois to Idaho Falls Fanning Field Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Idaho Falls Fanning Field Airport.

  • What documentation or ID do you need to fly to Idaho Falls Fanning Field Airport?

    The travel and health documents required for your trip to Idaho Falls Fanning Field Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Idaho Falls Fanning Field Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Illinois to Idaho Falls?

Best airlines flying from Illinois to Idaho Falls

Compare and see reviews for airlines that fly from Illinois to Idaho Falls with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $314Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $342Free CancellationRating
8.0
7,987 reviews
Search Delta flights
United AirlinesPriceFrom $406Free CancellationRating
7.4
8,912 reviews
Search United Airlines flights

Traveling to a place near Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
Rexburg

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Idaho Falls?

Finding the right flight to Idaho Falls from Illinois is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Idaho Falls quick and easy, saving you time and money.

Can I find flights from Illinois to Idaho Falls with flexible booking policies on momondo?

Yes. All flights to Idaho Falls from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Illinois to Idaho Falls?

momondo provides multiple filters to help you find the best flight to Idaho Falls from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Illinois to Idaho Falls right now. Can momondo alert me if prices change?

Price alerts on flights to Idaho Falls from Illinois are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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