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$64+ Cheap flights from Illinois to Utah

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SLC
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Illinois to Utah

Keep the following information in mind while searching for Illinois to Utah flight deals. Data was last updated September 17, 2025.

Round-trip from

$144
(Frontier)

One-way from

$64
(Trip.com)

Popular in

December

Cheapest in

November

Average price

$327

Good round-trip deal

$352 or less

Good one-way deal

$176 or less
From Illinois to Utah
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One-way flight from Illinois to Utah
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Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Illinois to Utah.
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Price to beat on a one-way flight from Illinois to Utah.
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Find flight deals from Illinois to Utah

Cheapest flights from Illinois to Utah
Explore the most affordable flight options available from Illinois to Utah. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Frontier deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/227:55 pmSTL - SLC
1 stop5h 19mFrontier
Sat 9/279:58 pmSLC - STL
1 stop10h 08mFrontier
Deal found 9/15$144
This Frontier deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/179:59 pmSTL - SLC
1 stop13h 34mFrontier
Thu 10/2310:05 pmSLC - STL
1 stop10h 02mFrontier
Deal found 9/17$146
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:45 pmSTL - SLC
1 stop16h 55mFrontier
Thu 11/208:08 amSLC - STL
1 stop9h 50mFrontier
Deal found 9/14$149
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/308:40 pmSTL - SLC
1 stop11h 52mFrontier
Thu 11/68:10 pmSLC - STL
1 stop11h 57mFrontier
Deal found 9/15$153
This Flightnetwork deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/18:40 pmSTL - SLC
1 stop12h 52mFrontier
Sat 11/88:10 pmSLC - STL
1 stop11h 57mFrontier
Deal found 9/17$155
This Booking.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/287:55 pmSTL - SLC
1 stop12h 37mFrontier
Thu 10/23:20 pmSLC - STL
1 stop16h 46mFrontier
Deal found 9/16$156
This Frontier deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2510:49 amSTL - SLC
1 stop5h 56mFrontier
Sat 10/49:58 pmSLC - STL
1 stop10h 08mFrontier
Deal found 9/15$160
This Trip.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:52 pmSTL - SLC
1 stop12h 40mFrontier
Thu 10/1610:05 pmSLC - STL
1 stop10h 02mFrontier
Deal found 9/15$164
This Frontier deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/510:39 amSTL - SLC
1 stop6h 06mFrontier
Mon 10/69:45 pmSLC - STL
1 stop10h 22mFrontier
Deal found 9/16$170
This Booking.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/25:35 amORD - SLC
1 stop26h 57mFrontier
Sat 10/49:58 pmSLC - ORD
1 stop10h 39mFrontier
Deal found 9/17$171
This Booking.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:55 pmSTL - SLC
1 stop12h 37mFrontier
Mon 10/69:45 pmSLC - STL
1 stop10h 22mFrontier
Deal found 9/17$172
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:50 amORD - SLC
1 stop11h 10mFrontier
Mon 10/1310:05 pmSLC - ORD
1 stop24h 48mFrontier
Deal found 9/16$172

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Utah 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, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Illinois to Utah that are best for you.

Fly from

Illinois

Fly to

Utah

Route

Depart

Return

Price

St. LouisSalt Lake City

STL - SLC

STLSLC

Lambert-St Louis

Sun 9/28

7:55 pm-7:32 am

1 stop12h 37m

Salt Lake City

Wed 10/1

8:45 am-9:06 am

1 stop23h 21m

$156

ChicagoSalt Lake City

MDW - SLC

MDWSLC

Chicago Midway

Thu 10/9

6:24 pm-7:32 am

1 stop14h 08m

Salt Lake City

Sun 10/12

10:05 pm-9:31 am

1 stop10h 26m

$188

St. LouisSalt Lake City

STL - SLC

STLSLC

Lambert-St Louis

Tue 9/23

7:55 pm-5:15 pm

2 stops22h 20m

Salt Lake City

Mon 10/6

9:45 pm-9:07 am

1 stop10h 22m

$202

ChicagoSalt Lake City

MDW - SLC

MDWSLC

Chicago Midway

Sat 11/1

3:57 pm-10:08 am

1 stop19h 11m

Salt Lake City

Mon 11/3

8:10 pm-11:38 am

2 stops14h 28m

$223

ChicagoSalt Lake City

MDW - SLC

MDWSLC

Chicago Midway

Fri 10/17

5:10 am-11:35 am

2 stops31h 25m

Salt Lake City

Sat 10/25

12:30 pm-11:20 pm

2 stops33h 50m

$256

ChicagoSaint George

ORD - SGU

ORDSGU

Chicago O'Hare Intl

Tue 10/21

5:01 am-9:56 am

1 stop5h 55m

Saint George

Sat 10/25

5:18 am-1:12 pm

1 stop6h 54m

$258

ChicagoSaint George

ORD - SGU

ORDSGU

Chicago O'Hare Intl

Fri 11/14

7:10 am-4:00 pm

1 stop9h 50m

Saint George

Tue 11/18

11:30 am-7:30 pm

1 stop7h 00m

$258

MolineSalt Lake City

MLI - SLC

MLISLC

Moline Quad-City

Wed 11/5

5:00 pm-12:36 am

1 stop8h 36m

Salt Lake City

Sat 11/8

1:26 pm-10:20 pm

1 stop7h 54m

$259

PeoriaSalt Lake City

PIA - SLC

PIASLC

Greater Peoria

Sat 10/18

8:39 am-1:15 pm

1 stop5h 36m

Salt Lake City

Tue 11/11

12:51 pm-9:31 pm

1 stop7h 40m

$259

PeoriaSalt Lake City

PIA - SLC

PIASLC

Greater Peoria

Fri 10/17

5:20 pm-10:25 pm

1 stop6h 05m

Salt Lake City

Mon 10/20

4:08 pm-10:15 pm

1 stop5h 07m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Utah

Have a flexible travel schedule? Discover the best time to fly to Utah from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Utah

What is the cheapest month to book a flight from Illinois to Utah?

Currently, October is the cheapest month in which you can book a flight from Illinois to Utah (average of $277). Flying from Illinois to Utah in March is currently the most expensive (average of $417). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to UT?

Find hourly flight availability from Illinois to Utah. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Utah as you normally would.

Weekly flight availability from Illinois to Utah

Explore weekly flight availability from Illinois to Utah. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 17, 2025.

The most flights from USIL to USUT are scheduled on a Monday (30 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).

Reviews of airlines servicing Utah

Get insights into the airlines that provide service to Utah. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Utah. Reviews last updated September 17, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Illinois to Utah to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,961 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,926 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,173 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Illinois to Utah. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Utah?

    Frontier, United Airlines, and Delta can get you from Illinois to Utah in just under 5h 55m. Your travel time can differ by up to 6h 42m. Airlines will cover a distance of 1403 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to Utah one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $78. However, be on the lookout for offers from Hawaiian Airlines and United Airlines, as they are both options that can get you from Illinois to Utah for a low price.

  • Can I find deals for flights from Illinois to Utah that include hotel bookings?

    Yes. In addition to deals on Illinois to Utah flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Utah?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Utah.

  • Can I find deals for business class flights from Illinois to Utah?

    Yes. Cheapflights offers flight deals from Illinois to Utah by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Utah?

    Currently, October is the cheapest month in which you can book a flight from Illinois to Utah (average of $277). Flying from Illinois to Utah in March is currently the most expensive (average of $417). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Illinois to Utah

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Illinois to Utah

Discover the top 7 airlines that operate flights from Illinois to Utah. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$88Average$234FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$96Average$201FlexibilityNo cancel feeOn-time88%
Spirit AirlinesCheapest$136Average$256FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$148Average$451FlexibilityNo cancel feeOn-time63%
DeltaCheapest$166Average$351FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$194Average$507FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$213Average$496FlexibilityNo cancel feeOn-time69%

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