What is the cheapest airline that flies from Idaho to Illinois?

Alaska Airlines, American Airlines, and Delta are the most popular carriers operating from Idaho to Illinois

What airlines fly to Illinois?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Illinois from Idaho according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How many flights depart from Idaho to Illinois on average per week?

92 flights are operational weekly from Idaho to Illinois as of May 2026. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.

How many flights depart from Idaho to Illinois on average per day?

The number of flights available between Idaho and Illinois is 13 per day as of May 2026. The most frequent departure time is 12:00PM, with 70% of daily flights leaving in the afternoon.

How long is the flight from Idaho to Illinois?

The flight from Idaho to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Idaho Falls (a popular airport in Idaho) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 3h 16m on average. If you fly from Boise (another popular airport in Idaho) to Chicago O'Hare Intl Airport, then the average flight time is 3h 24m.

When did momondo last update prices for flights from Idaho to Illinois?

Prices for flights from Idaho to Illinois refresh daily.

How many operators does momondo search for flights from Idaho to Illinois?

The number of operators available for flights from Idaho to Illinois is 5 as of May 2026.

How old do you have to be to fly from Idaho to Illinois?

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 Idaho to Illinois.

What documentation or ID do you need to fly to Illinois?

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$105 Cheap Flights from Idaho to Illinois in 2026

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Find the cheapest flights from Idaho to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:44 pm - 6:00 pm

IDA

ORD

3h 16mnonstop

9:40 am - 12:20 pm

ORD

IDA

3h 40mnonstop

$271American Airlines

Sat, Oct 3 - Tue, Oct 6

12:33 pm - 8:32 pm

GEG

ORD

5h 59m

1 stop

9:48 pm - 11:36 am

ORD

GEG

15h 48m

1 stop

$280Frontier

Mon, Jun 1 - Tue, Jun 9

4:14 pm - 12:44 am

IDA

ORD

7h 30m

1 stop

9:00 am - 11:45 am

ORD

IDA

3h 45mnonstop

$281United Airlines

Wed, Jul 1 - Sat, Jul 4

5:54 pm - 12:44 am

IDA

ORD

5h 50m

1 stop

5:00 am - 9:50 am

ORD

IDA

5h 50m

1 stop

$291United Airlines

Wed, Jul 1 - Sat, Jul 4

12:46 pm - 10:59 pm

GEG

ORD

8h 13m

1 stop

6:00 am - 12:29 pm

ORD

GEG

8h 29m

1 stop

$303Alaska Airlines

Thu, Jun 4 - Wed, Jun 10

8:31 am - 7:55 pm

GEG

ORD

9h 24m

1 stop

7:00 am - 11:52 am

ORD

GEG

6h 52m

1 stop

$305Alaska Airlines

Tue, Sep 22 - Sat, Sep 26

10:40 pm - 10:00 am

GEG

MDW

9h 20m

1 stop

9:54 am - 1:18 pm

MDW

GEG

5h 24m

1 stop

$331Delta

Tue, Jun 2 - Wed, Jun 17

12:40 pm - 9:46 pm

GEG

MDW

7h 06m

1 stop

9:20 am - 1:07 pm

MDW

GEG

5h 47m

1 stop

$335Delta

Thu, Sep 17 - Mon, Sep 21

7:55 pm - 5:45 am

BOI

MDW

8h 50m

1 stop

6:00 am - 1:25 pm

MDW

BOI

8h 25m

1 stop

$335Southwest

Tue, Jul 14 - Wed, Jul 29

6:25 am - 11:55 am

GEG

MDW

3h 30mnonstop

6:55 pm - 12:05 am

MDW

GEG

7h 10m

1 stop

$338Southwest

Tue, Jun 9 - Tue, Jun 16

Alaska Airlines flights from Idaho to Illinois

Our best Alaska Airlines deals on Idaho to Illinois flight tickets

Alaska Airlines

Jun 4

GEG12:46 pmSpokane

8h 13m

1 stop

ORD10:59 pmChicago O'Hare Intl

Jun 10

ORD6:00 amChicago O'Hare Intl

8h 29m

1 stop

GEG12:29 pmSpokane

$303

Alaska Airlines

Sep 22

GEG8:31 amSpokane

9h 24m

1 stop

ORD7:55 pmChicago O'Hare Intl

Sep 26

ORD7:00 amChicago O'Hare Intl

6h 52m

1 stop

GEG11:52 amSpokane

$305

Alaska Airlines

Oct 21

IDA1:46 pmIdaho Falls Fanning Field

9h 13m

1 stop

ORD11:59 pmChicago O'Hare Intl

Oct 28

ORD9:00 amChicago O'Hare Intl

7h 35m

1 stop

IDA3:35 pmIdaho Falls Fanning Field

$310

Delta flights from Idaho to Illinois

Our best Delta deals on Idaho to Illinois flight tickets

Delta

Jun 10

GEG1:00 pmSpokane

8h 39m

1 stop

ORD11:39 pmChicago O'Hare Intl

Jun 16

ORD6:30 amChicago O'Hare Intl

7h 10m

1 stop

GEG11:40 amSpokane

$331

Delta

Jun 5

IDA3:16 pmIdaho Falls Fanning Field

5h 34m

1 stop

ORD9:50 pmChicago O'Hare Intl

Jun 12

ORD2:07 pmChicago O'Hare Intl

9h 24m

2 stops

IDA10:31 pmIdaho Falls Fanning Field

$334

Delta

Sep 17

GEG12:40 pmSpokane

7h 06m

1 stop

MDW9:46 pmChicago Midway

Sep 21

MDW9:20 amChicago Midway

5h 47m

1 stop

GEG1:07 pmSpokane

$335

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Sat 10/3

1:44 pm-6:00 pm

Nonstop3h 16m

Chicago O'Hare Intl

Tue 10/6

9:40 am-12:20 pm

Nonstop3h 40m

$271

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Mon 6/1

12:33 pm-8:32 pm

1 stop5h 59m

Chicago O'Hare Intl

Tue 6/9

9:48 pm-11:36 am

1 stop15h 48m

$280

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Wed 7/1

4:14 pm-12:44 am

1 stop7h 30m

Chicago O'Hare Intl

Sat 7/4

9:00 am-11:45 am

Nonstop3h 45m

$281

Idaho FallsChicago

IDA - ORD

IDAORD

Idaho Falls Fanning Field

Wed 7/1

5:54 pm-12:44 am

1 stop5h 50m

Chicago O'Hare Intl

Sat 7/4

5:00 am-9:50 am

1 stop5h 50m

$291

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Thu 6/4

12:46 pm-10:59 pm

1 stop8h 13m

Chicago O'Hare Intl

Wed 6/10

6:00 am-12:29 pm

1 stop8h 29m

$303

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Tue 9/22

8:31 am-7:55 pm

1 stop9h 24m

Chicago O'Hare Intl

Sat 9/26

7:00 am-11:52 am

1 stop6h 52m

$305

SpokaneChicago

GEG - MDW

GEGMDW

Spokane

Tue 6/2

10:40 pm-10:00 am

1 stop9h 20m

Chicago Midway

Wed 6/17

9:54 am-1:18 pm

1 stop5h 24m

$331

SpokaneChicago

GEG - MDW

GEGMDW

Spokane

Thu 9/17

12:40 pm-9:46 pm

1 stop7h 06m

Chicago Midway

Mon 9/21

9:20 am-1:07 pm

1 stop5h 47m

$335

BoiseChicago

BOI - MDW

BOIMDW

Boise Air Term. Gowen Fld

Tue 7/14

7:55 pm-5:45 am

1 stop8h 50m

Chicago Midway

Wed 7/29

6:00 am-1:25 pm

1 stop8h 25m

$335

SpokaneChicago

GEG - MDW

GEGMDW

Spokane

Tue 6/9

6:25 am-11:55 am

Nonstop3h 30m

Chicago Midway

Tue 6/16

6:55 pm-12:05 am

1 stop7h 10m

$338

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Idaho to Illinois

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

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Idaho is in July. Flight prices, which tend to average around $87, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of July, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $87.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Idaho to Illinois is on a Thursday when prices can be found for as low as $463. Flights from Idaho to Illinois on a Sunday will generally be more expensive and average around $716. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is at noon. Flights from Idaho to Illinois during this time can be as low as $434. Flights in the morning are often more expensive with an average ticket price of $612.

What is the cheapest Idaho to Illinois flight route?

Fly from Boise Air Term. Gowen Fld to Chicago Midway for the best Idaho - Illinois flight prices

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

You are more likely to see cheaper flights to Illinois from Idaho when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $401 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Idaho for as low as $138 on momondo.

Can stopping save me money on Idaho to Illinois flights?

You could potentially save up to 14% on your flight if you consider stops on a Idaho to Illinois flight.

Cheap Idaho to Illinois flight deals and tips

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

Best Price Found	$174
Fastest flight time	2h 57m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Idaho in the past 72 hours is $174. The best round-trip flight deal from Idaho to Illinois found on momondo in the last 72 hours is $437.

The fastest flight from Idaho to Illinois takes 2h 57m

Direct flights go from Idaho to Illinois every day.

There are 98 airports in Illinois. From Idaho there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW).

Search flight deals

Frequently asked questions about flying from Idaho to Illinois

When did momondo last update prices for flights from Idaho to Illinois?
Prices for flights from Idaho to Illinois refresh daily.
How many operators does momondo search for flights from Idaho to Illinois?
The number of operators available for flights from Idaho to Illinois is 5 as of May 2026.
How old do you have to be to fly from Idaho to Illinois?
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 Idaho to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Idaho to Illinois?
Based on momondo bookings for flights between Idaho and Illinois, the leading plane model is Embraer 175 (Enhanced Winglets), making up 31.05% of the total bookings. Other popular models include Boeing 737-800 with 17.34%, Airbus A319 with 16.33%, and Boeing 737 MAX 8 with 6.65%.

Best airlines flying from Idaho to Illinois

Compare and see reviews for airlines that fly from Idaho to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $123	Free Cancellation	Rating 7.9 8,446 reviews	Search Delta flights
Southwest	PriceFrom $233	Free Cancellation	Rating 8.0 4,295 reviews	Search Southwest flights
United Airlines	PriceFrom $239	Free Cancellation	Rating 7.4 9,701 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $260	Free Cancellation	Rating 7.9 12,354 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $269	Free Cancellation	Rating 7.1 11,661 reviews	Search American Airlines flights

Why use momondo?

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

Finding the right flight to Illinois from Idaho 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 Illinois quick and easy, saving you time and money.

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

momondo does allow users to show only those flights to Illinois from Idaho which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Idaho.

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

If you are simply researching potential flights to Illinois, momondo offers a useful price alert feature which will track prices for flights to Illinois from Idaho and alert you when they change.

An easier way to manage your Illinois trip

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Find better results for your trip to Illinois

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Complete your trip

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Popular cities in Illinois

Flights to New Yorkfrom $77

Flights to Los Angelesfrom $46

Flights to Orlandofrom $63

Flights to Miamifrom $56

Flights to Chicagofrom $59

Flights to San Franciscofrom $58

Flights to Las Vegasfrom $48

Flights to Washington, D.C.from $57

Flights to Bostonfrom $73

Flights to Atlantafrom $50

Flights to Fort Lauderdalefrom $56

Flights to Dallasfrom $50

Cheap flights from Idaho to Illinois from $105

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho to Illinois departing on 6/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

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Alaska Airlines flights from Idaho to Illinois

Our best Alaska Airlines deals on Idaho to Illinois flight tickets

Delta flights from Idaho to Illinois

Our best Delta deals on Idaho to Illinois flight tickets

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Use the filters below to find and compare flights from Idaho to Illinois that are best for you.

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How to get the cheapest flight ticket from Idaho to Illinois

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

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

What is the cheapest Idaho to Illinois flight route?

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

Can stopping save me money on Idaho to Illinois flights?

What is the cheapest airline that flies from Idaho to Illinois?

What airlines fly to Illinois?

How many flights depart from Idaho to Illinois on average per day?

How many flights depart from Idaho to Illinois on average per week?

How long is the flight from Idaho to Illinois?

Cheap Idaho to Illinois flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from Idaho to Illinois

Best airlines flying from Idaho to Illinois

Compare and see reviews for airlines that fly from Idaho to Illinois with momondo

Why use momondo?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo

Idaho flight routes

According to popular flight searches on momondo this year

Illinois flight routes

According to popular flight searches on momondo this year

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