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Cheap flights from Illinois to Idaho Falls from $160

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 9/26. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Idaho Falls

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
9:40 am - 12:20 pm
ORD
-
IDA
3h 40mnonstop
American Airlines Logo
1:43 pm - 6:00 pm
IDA
-
ORD
3h 17mnonstop
$271American Airlines
Sat, Oct 17 - Tue, Oct 20
United Airlines Logo
5:00 am - 9:53 am
ORD
-
IDA
5h 53m
1 stop
United Airlines Logo
2:32 pm - 10:44 pm
IDA
-
ORD
7h 12m
1 stop
$291United Airlines
Sat, Oct 24 - Tue, Oct 27
United Airlines Logo
9:00 am - 11:38 am
ORD
-
IDA
3h 38mnonstop
United Airlines Logo
2:25 pm - 10:00 pm
IDA
-
ORD
6h 35m
1 stop
$294United Airlines
Sat, Aug 22 - Wed, Aug 26
United Airlines Logo
7:00 am - 1:29 pm
ORD
-
IDA
7h 29m
1 stop
United Airlines Logo
4:04 pm - 10:46 pm
IDA
-
ORD
5h 42m
1 stop
$299United Airlines
Sat, Aug 22 - Wed, Aug 26
Delta Logo
2:00 pm - 6:20 pm
ORD
-
IDA
5h 20m
1 stop
Delta Logo
11:35 am - 6:19 pm
IDA
-
ORD
5h 44m
1 stop
$321Delta
Tue, Aug 11 - Mon, Aug 17
Alaska Airlines Logo
7:00 am - 3:17 pm
STL
-
IDA
9h 17m
1 stop
Alaska Airlines Logo
6:04 am - 2:15 pm
IDA
-
STL
7h 11m
1 stop
$369Alaska Airlines
Sat, Nov 14 - Wed, Nov 18
Multiple Airlines Logo
7:10 pm - 4:05 pm
STL
-
IDA
21h 55m
1 stop
Multiple Airlines Logo
10:54 pm - 7:23 pm
IDA
-
STL
19h 29m
2 stops
$394Multiple Airlines
Thu, Aug 6 - Mon, Aug 10
Delta Logo
1:22 pm - 10:32 pm
STL
-
IDA
10h 10m
2 stops
Delta Logo
3:22 pm - 9:00 pm
IDA
-
STL
4h 38m
1 stop
$409Delta
Tue, Jul 7 - Sat, Jul 11
Alaska Airlines Logo
7:00 am - 3:35 pm
STL
-
IDA
9h 35m
1 stop
Alaska Airlines Logo
1:46 pm - 11:59 pm
IDA
-
STL
9h 13m
1 stop
$419Alaska Airlines
Wed, Oct 14 - Mon, Oct 19
Multiple Airlines Logo
7:10 pm - 4:05 pm
STL
-
IDA
21h 55m
1 stop
Multiple Airlines Logo
10:54 pm - 6:05 pm
IDA
-
STL
18h 11m
1 stop
$424Multiple Airlines
Thu, Aug 6 - Mon, Aug 10

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American Airlines flights from Illinois to Idaho Falls

Our best American Airlines deals on Illinois to Idaho Falls flight tickets
American Airlines
Oct 17
ORD9:40 amChicago O'Hare Intl
3h 40m
IDA12:20 pmIdaho Falls Fanning Field
Oct 20
IDA1:43 pmIdaho Falls Fanning Field
3h 17m
ORD6:00 pmChicago O'Hare Intl
$271
American Airlines
Oct 24
ORD7:00 amChicago O'Hare Intl
7h 44m
1 stop
IDA1:44 pmIdaho Falls Fanning Field
Oct 27
IDA1:43 pmIdaho Falls Fanning Field
3h 17m
ORD6:00 pmChicago O'Hare Intl
$300
American Airlines
Oct 17
ORD3:00 pmChicago O'Hare Intl
7h 22m
1 stop
IDA9:22 pmIdaho Falls Fanning Field
Oct 20
IDA1:43 pmIdaho Falls Fanning Field
3h 17m
ORD6:00 pmChicago O'Hare Intl
$311

United Airlines flights from Illinois to Idaho Falls

Our best United Airlines deals on Illinois to Idaho Falls flight tickets
United Airlines
Oct 24
ORD5:00 amChicago O'Hare Intl
5h 53m
1 stop
IDA9:53 amIdaho Falls Fanning Field
Oct 27
IDA2:32 pmIdaho Falls Fanning Field
7h 12m
1 stop
ORD10:44 pmChicago O'Hare Intl
$291
United Airlines
Aug 22
ORD9:00 amChicago O'Hare Intl
3h 38m
IDA11:38 amIdaho Falls Fanning Field
Aug 26
IDA2:25 pmIdaho Falls Fanning Field
6h 35m
1 stop
ORD10:00 pmChicago O'Hare Intl
$294
United Airlines
Aug 22
ORD7:00 amChicago O'Hare Intl
7h 29m
1 stop
IDA1:29 pmIdaho Falls Fanning Field
Aug 26
IDA4:04 pmIdaho Falls Fanning Field
5h 42m
1 stop
ORD10:46 pmChicago O'Hare Intl
$299

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 June 24, 2026.
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

Cheapest round-trip
Quickest round-trip

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 10/17

9:40 am-12:20 pm

Nonstop3h 40m

Idaho Falls Fanning Field

Tue 10/20

1:43 pm-6:00 pm

Nonstop3h 17m

$271

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 10/24

5:00 am-9:53 am

1 stop5h 53m

Idaho Falls Fanning Field

Tue 10/27

2:32 pm-10:44 pm

1 stop7h 12m

$291

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 8/22

9:00 am-11:38 am

Nonstop3h 38m

Idaho Falls Fanning Field

Wed 8/26

2:25 pm-10:00 pm

1 stop6h 35m

$294

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sat 8/22

7:00 am-1:29 pm

1 stop7h 29m

Idaho Falls Fanning Field

Wed 8/26

4:04 pm-10:46 pm

1 stop5h 42m

$299

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Tue 8/11

2:00 pm-6:20 pm

1 stop5h 20m

Idaho Falls Fanning Field

Mon 8/17

11:35 am-6:19 pm

1 stop5h 44m

$321

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Sat 11/14

7:00 am-3:17 pm

1 stop9h 17m

Idaho Falls Fanning Field

Wed 11/18

6:04 am-2:15 pm

1 stop7h 11m

$369

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Thu 8/6

7:10 pm-4:05 pm

1 stop21h 55m

Idaho Falls Fanning Field

Mon 8/10

10:54 pm-7:23 pm

2 stops19h 29m

$394

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Tue 7/7

1:22 pm-10:32 pm

2 stops10h 10m

Idaho Falls Fanning Field

Sat 7/11

3:22 pm-9:00 pm

1 stop4h 38m

$409

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Wed 10/14

7:00 am-3:35 pm

1 stop9h 35m

Idaho Falls Fanning Field

Mon 10/19

1:46 pm-11:59 pm

1 stop9h 13m

$419

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Thu 8/6

7:10 pm-4:05 pm

1 stop21h 55m

Idaho Falls Fanning Field

Mon 8/10

10:54 pm-6:05 pm

1 stop18h 11m

$424

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 April, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $0.

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 $397. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Friday is $550.

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 flights?

There are 2 cabin classes available to choose from on Illinois to Idaho Falls flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to Idaho Falls flights?

No. A direct flight is the cheapest option for a flight between Illinois to Idaho Falls.

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

$409

Fastest flight time

3h 33m

Direct flights

Every day

Airports in Idaho Falls

1 airport
The best flight deal from Illinois to Idaho Falls found on momondo in the last 72 hours is $409
The fastest flight from Illinois to Idaho Falls takes 3h 33m
Direct flights go from Illinois to Idaho Falls every day.
There is 1 airport in Idaho Falls. From Illinois there are direct flights to Idaho Falls Fanning Field (IDA).
Search flight deals

Frequently asked questions about flying from Illinois to Idaho Falls

  • 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
United AirlinesPriceFrom $319Free CancellationRating
7.4
9,881 reviews
Search United Airlines flights
American AirlinesPriceFrom $371Free CancellationRating
7.1
11,751 reviews
Search American 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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