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

Hawaiian Airlines, Delta, and United Airlines are the most popular carriers operating from Idaho to Illinois

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 17m 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.

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

170 flights are operational weekly from Idaho to Illinois as of September 2025. The most popular departure day for this route is Mon, with 16% 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 24 per day as of September 2025. The most frequent departure time is 12:00PM, with 71% of daily flights leaving in the afternoon.

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 37% 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.

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 September 2025.

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.

$98 Cheap Flights from Idaho to Illinois in 2025/26

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Find the cheapest flights from Idaho to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

12:03 pm - 12:43 amGEG-ORD

10h 40m1 stop

6:00 am - 11:08 amORD-GEG

7h 08m1 stop

$188Frontier

Find Deal

Thu, Oct 30 - Thu, Nov 6

7:00 am - 6:59 pmGEG-ORD

9h 59m1 stop

8:00 am - 12:37 pmORD-GEG

6h 37m1 stop

$197Alaska Airlines

Find Deal

Wed, Oct 15 - Sat, Oct 18

1:10 pm - 9:43 pmGEG-ORD

6h 33m1 stop

2:25 pm - 9:05 pmORD-GEG

8h 40m1 stop

$207Delta

Find Deal

Mon, Oct 27 - Tue, Nov 4

12:51 pm - 10:14 pmGEG-MDW

7h 23m1 stop

6:00 am - 11:41 amMDW-GEG

7h 41m1 stop

$215Delta

Find Deal

Wed, Oct 22 - Wed, Oct 29

6:00 am - 7:20 pmGEG-MDW

11h 20m1 stop

6:25 am - 12:05 pmMDW-GEG

7h 40m1 stop

$222Southwest

Find Deal

Tue, Oct 14 - Tue, Oct 21

1:14 pm - 7:12 pmGEG-ORD

3h 58mnonstop

10:30 am - 12:32 pmORD-GEG

4h 02mnonstop

$226American Airlines

Find Deal

Tue, Nov 11 - Fri, Nov 14

6:00 am - 7:20 pmGEG-MDW

11h 20m1 stop

7:35 am - 9:40 pmMDW-GEG

16h 05m2 stops

$233Southwest

Find Deal

Tue, Oct 14 - Tue, Oct 21

1:38 pm - 10:39 pmGEG-ORD

7h 01m1 stop

9:30 am - 11:42 amORD-GEG

4h 12mnonstop

$236United Airlines

Find Deal

Tue, Oct 14 - Tue, Oct 21

11:20 am - 5:03 pmGEG-ORD

3h 43mnonstop

9:30 am - 11:42 amORD-GEG

4h 12mnonstop

$245United Airlines

Find Deal

Tue, Oct 14 - Tue, Oct 21

6:47 am - 12:37 pmGEG-ORD

3h 50mnonstop

10:01 am - 12:06 pmORD-GEG

4h 05mnonstop

$246American Airlines

Find Deal

Tue, Dec 23 - Thu, Jan 1

Hawaiian Airlines flights from Idaho to Illinois

Our best Hawaiian Airlines deals on Idaho to Illinois flight tickets

Hawaiian Airlines

Mar 3

GEG8:40 pmSpokane

6h 24m

1 stop

ORD5:04 amChicago O'Hare Intl

Mar 4

ORD7:45 amChicago O'Hare Intl

7h 05m

1 stop

GEG12:50 pmSpokane

$209

Find similar

Hawaiian Airlines

Dec 12

GEG7:00 amSpokane

9h 54m

1 stop

ORD6:54 pmChicago O'Hare Intl

Dec 13

ORD3:05 pmChicago O'Hare Intl

10h 54m

1 stop

GEG11:59 pmSpokane

$244

Find similar

Hawaiian Airlines

Oct 1

GEG1:40 pmSpokane

8h 23m

1 stop

ORD12:03 amChicago O'Hare Intl

Oct 4

ORD3:50 pmChicago O'Hare Intl

8h 51m

1 stop

GEG10:41 pmSpokane

$256

Find similar

Delta flights from Idaho to Illinois

Our best Delta deals on Idaho to Illinois flight tickets

Delta

Oct 27

GEG1:10 pmSpokane

6h 33m

1 stop

ORD9:43 pmChicago O'Hare Intl

Nov 4

ORD2:25 pmChicago O'Hare Intl

8h 40m

1 stop

GEG9:05 pmSpokane

$207

Find similar

Delta

Oct 25

GEG3:37 pmSpokane

6h 17m

1 stop

ORD11:54 pmChicago O'Hare Intl

Nov 1

ORD7:50 amChicago O'Hare Intl

6h 11m

1 stop

GEG12:01 pmSpokane

$215

Find similar

Delta

Oct 30

GEG12:51 pmSpokane

9h 07m

1 stop

ORD11:58 pmChicago O'Hare Intl

Nov 1

ORD7:50 amChicago O'Hare Intl

6h 11m

1 stop

GEG12:01 pmSpokane

$216

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Thu 10/30

12:03 pm-12:43 am

1 stop10h 40m

Chicago O'Hare Intl

Thu 11/6

6:00 am-11:08 am

1 stop7h 08m

$188

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Wed 10/15

7:00 am-6:59 pm

1 stop9h 59m

Chicago O'Hare Intl

Sat 10/18

8:00 am-12:37 pm

1 stop6h 37m

$197

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Mon 10/27

1:10 pm-9:43 pm

1 stop6h 33m

Chicago O'Hare Intl

Tue 11/4

2:25 pm-9:05 pm

1 stop8h 40m

$207

SpokaneChicago

GEG - MDW

GEGMDW

Spokane

Wed 10/22

12:51 pm-10:14 pm

1 stop7h 23m

Chicago Midway

Wed 10/29

6:00 am-11:41 am

1 stop7h 41m

$215

SpokaneChicago

GEG - MDW

GEGMDW

Spokane

Tue 10/14

6:00 am-7:20 pm

1 stop11h 20m

Chicago Midway

Tue 10/21

6:25 am-12:05 pm

1 stop7h 40m

$222

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Tue 11/11

1:14 pm-7:12 pm

Nonstop3h 58m

Chicago O'Hare Intl

Fri 11/14

10:30 am-12:32 pm

Nonstop4h 02m

$226

SpokaneChicago

GEG - MDW

GEGMDW

Spokane

Tue 10/14

6:00 am-7:20 pm

1 stop11h 20m

Chicago Midway

Tue 10/21

7:35 am-9:40 pm

2 stops16h 05m

$233

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Tue 10/14

1:38 pm-10:39 pm

1 stop7h 01m

Chicago O'Hare Intl

Tue 10/21

9:30 am-11:42 am

Nonstop4h 12m

$236

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Tue 10/14

11:20 am-5:03 pm

Nonstop3h 43m

Chicago O'Hare Intl

Tue 10/21

9:30 am-11:42 am

Nonstop4h 12m

$245

SpokaneChicago

GEG - ORD

GEGORD

Spokane

Tue 12/23

6:47 am-12:37 pm

Nonstop3h 50m

Chicago O'Hare Intl

Thu 1/1

10:01 am-12:06 pm

Nonstop4h 05m

$246

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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 January. Flight prices, which tend to average around $313, 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 January, then flying in February 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 Illinois?

The cheapest day to depart from Idaho to Illinois is on a Thursday when prices can be found for as low as $489. Flights from Idaho to Illinois on a Sunday will generally be more expensive and average around $849. 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 $426. Flights in the morning are often more expensive with an average ticket price of $734.

What is the cheapest Idaho to Illinois flight route?

Fly from Boise Air Term. Gowen Fld to Chicago O'Hare Intl for the best Idaho - Illinois flight prices

How far in advance should I book a flight 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 $390 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 $251 on momondo.

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

There are 4 cabin classes available to choose from on Idaho to Illinois 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 Idaho to Illinois flights?

You could potentially save up to 37% 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	$187
Fastest flight time	3h 04m
Direct flights	Every day
Airports in Illinois	2 airports

The best one-way flight to Illinois from Idaho in the past 72 hours is $187. The best round-trip flight deal from Idaho to Illinois found on momondo in the last 72 hours is $351.

The fastest flight from Idaho to Illinois takes 3h 04m

Direct flights go from Idaho to Illinois every day.

There are 2 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW)

Search flight deals

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 September 2025.
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 25.00% of the total bookings. Other popular models include Airbus A319 with 23.12%, Airbus A320-100/200 with 22.37%, and Canadair (Bombardier) Regional Jet 700 with 9.59%.

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 $134	Free Cancellation	Rating 7.9 7,964 reviews	Search Delta flights
Alaska Airlines	PriceFrom $217	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $233	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights
United Airlines	PriceFrom $233	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
American Airlines	PriceFrom $255	Free Cancellation	Rating 7.2 10,000 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

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.

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Sun 10/19

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Find better results for your trip to Illinois

Popular cities in Illinois

Flights to New Yorkfrom $49

Flights to Los Angelesfrom $49

Flights to Miamifrom $49

Flights to Chicagofrom $47

Flights to Orlandofrom $60

Flights to Las Vegasfrom $48

Flights to San Franciscofrom $53

Flights to Washington, D.C.from $49

Flights to Bostonfrom $73

Flights to Atlantafrom $51

Flights to Dallasfrom $56

Flights to Seattlefrom $86

Idaho flight routes

Flights from Boise Air Term. Gowen Fld to Las Vegas Harry Reid Intl

Flights from Boise Air Term. Gowen Fld to Bozeman Gallatin Field

Flights from Idaho Falls Fanning Field to Las Vegas Harry Reid Intl

Flights from Boise Air Term. Gowen Fld to San Jose

Flights from Boise Air Term. Gowen Fld to Santa Ana J. Wayne/Orange Cnty

Flights from Boise Air Term. Gowen Fld to San Francisco

Cheap flights from Idaho to Illinois from $98

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 10/21. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Idaho to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Hawaiian Airlines flights from Idaho to Illinois

Our best Hawaiian 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.

See travel insights to Illinois from

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

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?

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 $426. Flights in the morning are often more expensive with an average ticket price of $734.

What is the cheapest Idaho to Illinois flight route?

Fly from Boise Air Term. Gowen Fld to Chicago O'Hare Intl for the best Idaho - Illinois flight prices

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

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

There are 4 cabin classes available to choose from on Idaho to Illinois 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 Idaho to Illinois flights?

You could potentially save up to 37% on your flight if you consider stops on a Idaho to Illinois flight.

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

Hawaiian Airlines, Delta, and United Airlines are the most popular carriers operating from Idaho to Illinois

What airlines fly to Illinois?

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

The number of flights available between Idaho and Illinois is 24 per day as of September 2025. The most frequent departure time is 12:00PM, with 71% of daily flights leaving in the afternoon.

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

170 flights are operational weekly from Idaho to Illinois as of September 2025. The most popular departure day for this route is Mon, with 16% of flights per week taking off on this day.

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

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

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

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

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

What is the most popular plane model 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?

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

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

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

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

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