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Cheap flights from Illinois to Idaho Falls from $123

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 2/12. 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

Enter your travel dates to find the best prices.
Hawaiian Airlines Logo
3:35 pm - 10:59 pm
ORD
-
IDA
8h 24m1 stop
Hawaiian Airlines Logo
9:00 am - 5:10 pm
IDA
-
ORD
7h 10m1 stop
$312Hawaiian Airlines
Thu, Jan 22 - Wed, Jan 28
Alaska Airlines Logo
3:35 pm - 10:59 pm
ORD
-
IDA
8h 24m1 stop
Alaska Airlines Logo
9:00 am - 5:10 pm
IDA
-
ORD
7h 10m1 stop
$330Alaska Airlines
Wed, Jan 14 - Wed, Jan 21
Alaska Airlines Logo
2:50 pm - 10:59 pm
STL
-
IDA
9h 09m1 stop
Alaska Airlines Logo
6:58 pm - 1:54 pm
IDA
-
STL
17h 56m1 stop
$342Alaska Airlines
Fri, Jan 30 - Sat, Jan 31
Alaska Airlines Logo
9:00 am - 10:59 pm
ORD
-
IDA
14h 59m2 stops
Alaska Airlines Logo
9:00 am - 5:10 pm
IDA
-
ORD
7h 10m1 stop
$353Alaska Airlines
Thu, Jan 22 - Wed, Jan 28
United Airlines Logo
7:15 am - 1:29 pm
ORD
-
IDA
7h 14m1 stop
United Airlines Logo
2:35 pm - 10:30 pm
IDA
-
ORD
6h 55m1 stop
$356United Airlines
Thu, Apr 30 - Fri, May 8
United Airlines Logo
8:46 am - 1:30 pm
MLI
-
IDA
5h 44m1 stop
United Airlines Logo
2:40 pm - 8:34 pm
IDA
-
MLI
4h 54m1 stop
$359United Airlines
Sat, Jan 10 - Tue, Jan 13
Delta Logo
6:04 pm - 10:20 pm
STL
-
IDA
5h 16m1 stop
Delta Logo
6:59 pm - 8:52 am
IDA
-
STL
12h 53m2 stops
$393Delta
Mon, Mar 9 - Fri, Mar 13
American Airlines Logo
6:10 am - 1:30 pm
ORD
-
IDA
8h 20m1 stop
American Airlines Logo
2:02 pm - 11:37 pm
IDA
-
ORD
8h 35m1 stop
$406American Airlines
Sun, Mar 1 - Wed, Mar 4
Delta Logo
3:25 pm - 10:20 pm
STL
-
IDA
7h 55m2 stops
Delta Logo
6:59 pm - 8:52 am
IDA
-
STL
12h 53m2 stops
$425Delta
Mon, Mar 9 - Fri, Mar 13
American Airlines Logo
6:29 am - 1:37 pm
BMI
-
IDA
8h 08m1 stop
American Airlines Logo
2:07 pm - 10:16 pm
IDA
-
BMI
7h 09m1 stop
$667American Airlines
Thu, Jan 15 - Sun, Jan 18

United Airlines flights from Illinois to Idaho Falls

Our best United Airlines deals on Illinois to Idaho Falls flight tickets
United Airlines
Jan 10
MLI8:46 amMoline Quad-City
5h 44m
1 stop
IDA1:30 pmIdaho Falls Fanning Field
Jan 13
IDA2:40 pmIdaho Falls Fanning Field
4h 54m
1 stop
MLI8:34 pmMoline Quad-City
$359
Find similar
United Airlines
Jan 31
MLI8:46 amMoline Quad-City
5h 44m
1 stop
IDA1:30 pmIdaho Falls Fanning Field
Feb 3
IDA10:51 amIdaho Falls Fanning Field
9h 45m
2 stops
MLI9:36 pmMoline Quad-City
$364
Find similar
United Airlines
Jan 10
MLI8:46 amMoline Quad-City
5h 44m
1 stop
IDA1:30 pmIdaho Falls Fanning Field
Jan 13
IDA10:51 amIdaho Falls Fanning Field
9h 45m
2 stops
MLI9:36 pmMoline Quad-City
$400
Find similar

Delta flights from Illinois to Idaho Falls

Our best Delta deals on Illinois to Idaho Falls flight tickets
Delta
Mar 9
STL6:04 pmLambert-St Louis
5h 16m
1 stop
IDA10:20 pmIdaho Falls Fanning Field
Mar 13
IDA6:59 pmIdaho Falls Fanning Field
12h 53m
2 stops
STL8:52 amLambert-St Louis
$393
Find similar
Delta
Mar 9
STL3:25 pmLambert-St Louis
7h 55m
2 stops
IDA10:20 pmIdaho Falls Fanning Field
Mar 13
IDA6:59 pmIdaho Falls Fanning Field
12h 53m
2 stops
STL8:52 amLambert-St Louis
$425
Find similar
Delta
Jan 26
STL3:31 pmLambert-St Louis
8h 26m
2 stops
IDA10:57 pmIdaho Falls Fanning Field
Jan 29
IDA5:25 amIdaho Falls Fanning Field
7h 23m
1 stop
STL1:48 pmLambert-St Louis
$524
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 December 18, 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

Thu 1/22

3:35 pm-10:59 pm

1 stop8h 24m

Idaho Falls Fanning Field

Wed 1/28

9:00 am-5:10 pm

1 stop7h 10m

$312

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Wed 1/14

3:35 pm-10:59 pm

1 stop8h 24m

Idaho Falls Fanning Field

Wed 1/21

9:00 am-5:10 pm

1 stop7h 10m

$330

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Fri 1/30

2:50 pm-10:59 pm

1 stop9h 09m

Idaho Falls Fanning Field

Sat 1/31

6:58 pm-1:54 pm

1 stop17h 56m

$342

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Thu 1/22

9:00 am-10:59 pm

2 stops14h 59m

Idaho Falls Fanning Field

Wed 1/28

9:00 am-5:10 pm

1 stop7h 10m

$353

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Thu 4/30

7:15 am-1:29 pm

1 stop7h 14m

Idaho Falls Fanning Field

Fri 5/8

2:35 pm-10:30 pm

1 stop6h 55m

$356

MolineIdaho Falls

MLI - IDA

MLIIDA

Moline Quad-City

Sat 1/10

8:46 am-1:30 pm

1 stop5h 44m

Idaho Falls Fanning Field

Tue 1/13

2:40 pm-8:34 pm

1 stop4h 54m

$359

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Mon 3/9

6:04 pm-10:20 pm

1 stop5h 16m

Idaho Falls Fanning Field

Fri 3/13

6:59 pm-8:52 am

2 stops12h 53m

$393

ChicagoIdaho Falls

ORD - IDA

ORDIDA

Chicago O'Hare Intl

Sun 3/1

6:10 am-1:30 pm

1 stop8h 20m

Idaho Falls Fanning Field

Wed 3/4

2:02 pm-11:37 pm

1 stop8h 35m

$406

St. LouisIdaho Falls

STL - IDA

STLIDA

Lambert-St Louis

Mon 3/9

3:25 pm-10:20 pm

2 stops7h 55m

Idaho Falls Fanning Field

Fri 3/13

6:59 pm-8:52 am

2 stops12h 53m

$425

BloomingtonIdaho Falls

BMI - IDA

BMIIDA

Bloomington-Normal

Thu 1/15

6:29 am-1:37 pm

1 stop8h 08m

Idaho Falls Fanning Field

Sun 1/18

2:07 pm-10:16 pm

1 stop7h 09m

$667

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 April is also cheap. Prices for this month can be found on momondo for an average of $342.

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

Our data shows that Friday 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 Wednesday as prices are generally higher than usual. According to our data, the average ticket price to Idaho Falls on Wednesday is $396.

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 $371. 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 2 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.

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

You could potentially save up to 19% on your flight if you consider stops on a Illinois to Idaho Falls flight.

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

Fastest flight time

5h 13m

Direct flights

Mon, Tue, Wed, Sat and Sun

Airports in Idaho Falls

1 airport
The fastest flight from Illinois to Idaho Falls takes 5h 13m
Direct flights go from Illinois to Idaho Falls on Monday, Tuesday, Wednesday, Saturday and Sunday. There are no airlines offering direct flights.
There is 1 airport in Idaho Falls. From Illinois there are direct flights to 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 $323Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights
United AirlinesPriceFrom $406Free CancellationRating
7.4
9,091 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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