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Illinois

$54+ Cheap flights from Utah to Illinois

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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
SLC — ORD
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Utah to Illinois

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

Round-trip from

$144
(Frontier)

One-way from

$54
(Trip.com)

Popular in

May

Cheapest in

November

Average price

$269

Good round-trip deal

$336 or less

Good one-way deal

$221 or less
From Utah to Illinois
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One-way flight from Utah to Illinois
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Highest demand for flights based on searches. 14% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 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 Utah to Illinois.
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Price to beat on a one-way flight from Utah to Illinois.
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Find flight deals from Utah to Illinois

Cheapest flights from Utah to Illinois
Explore the most affordable flight options available from Utah to Illinois. 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.
Sun 10/268:58 pmSLC - STL
1 stop11h 34mFrontier
Fri 10/311:09 pmSTL - SLC
1 stop6h 51mFrontier
Deal found 9/15$144
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 10/1610:05 pmSLC - STL
1 stop10h 02mFrontier
Mon 10/207:52 pmSTL - SLC
1 stop27h 27mFrontier
Deal found 9/15$145
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.
Tue 10/2112:30 pmSLC - STL
1 stop19h 37mFrontier
Wed 10/298:40 pmSTL - SLC
1 stop11h 52mFrontier
Deal found 9/15$146
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.
Fri 10/2410:05 pmSLC - STL
1 stop10h 02mFrontier
Mon 11/37:45 pmSTL - SLC
1 stop16h 55mFrontier
Deal found 9/15$153
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 10/24:10 pmSLC - STL
1 stop20h 43mFrontier
Mon 10/62:38 pmSTL - SLC
1 stop27h 01mFrontier
Deal found 9/17$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.
Fri 10/39:45 pmSLC - STL
1 stop10h 21mFrontier
Thu 10/97:52 pmSTL - SLC
1 stop5h 07mFrontier
Deal found 9/15$160
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 10/266:30 amSLC - ORD
1 stop26h 06mFrontier
Tue 10/287:14 amORD - SLC
1 stop16h 05mFrontier
Deal found 9/16$169
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.
Sat 10/49:58 pmSLC - ORD
1 stop10h 39mFrontier
Fri 10/109:54 pmORD - SLC
1 stop13h 39mFrontier
Deal found 9/16$170
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 10/29:45 pmSLC - STL
1 stop10h 21mFrontier
Sun 10/57:55 pmSTL - SLC
1 stop5h 19mFrontier
Deal found 9/15$170
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.
Fri 10/172:52 pmSLC - MDW
1 stop8h 32mFrontier
Mon 10/2010:56 pmMDW - SLC
1 stop12h 32mFrontier
Deal found 9/16$170
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.
Tue 10/1412:30 pmSLC - ORD
1 stop10h 23mFrontier
Sun 10/196:50 amORD - SLC
1 stop25h 42mFrontier
Deal found 9/15$171
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:59 pmSLC - MDW
1 stop25h 21mFrontier
Mon 10/2712:11 pmMDW - SLC
1 stop24h 29mFrontier
Deal found 9/15$172

Cheapflights Fare Finder

 
Customize your flight search to find flights from Utah to Illinois 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 Utah to Illinois that are best for you.

Fly from

Utah

Fly to

Illinois

Route

Depart

Return

Price

Salt Lake CitySt. Louis

SLC - STL

SLCSTL

Salt Lake City

Tue 9/30

1:42 pm-9:06 am

1 stop18h 24m

Lambert-St Louis

Wed 10/1

7:55 pm-11:15 am

1 stop16h 20m

$182

Salt Lake CitySt. Louis

SLC - STL

SLCSTL

Salt Lake City

Thu 10/30

10:19 pm-9:07 am

2 stops9h 48m

Lambert-St Louis

Thu 11/6

7:45 pm-12:01 am

1 stop5h 16m

$186

Salt Lake CitySt. Louis

SLC - STL

SLCSTL

Salt Lake City

Fri 10/17

10:05 pm-9:07 am

1 stop10h 02m

Lambert-St Louis

Sat 10/18

7:52 pm-7:32 am

1 stop12h 40m

$192

Salt Lake CityChicago

SLC - MDW

SLCMDW

Salt Lake City

Thu 10/2

12:54 pm-9:58 pm

1 stop8h 04m

Chicago Midway

Sun 10/5

10:18 am-3:45 pm

1 stop6h 27m

$195

Salt Lake CitySt. Louis

SLC - STL

SLCSTL

Salt Lake City

Wed 12/3

4:24 pm-4:49 pm

2 stops23h 25m

Lambert-St Louis

Wed 12/17

7:43 pm-11:38 am

1 stop16h 55m

$216

Salt Lake CitySt. Louis

SLC - STL

SLCSTL

Salt Lake City

Sun 9/28

9:45 pm-9:06 am

1 stop10h 21m

Lambert-St Louis

Sun 10/5

10:39 am-3:45 pm

1 stop6h 06m

$219

Salt Lake CitySt. Louis

SLC - STL

SLCSTL

Salt Lake City

Fri 10/24

3:43 pm-9:07 am

2 stops16h 24m

Lambert-St Louis

Mon 10/27

10:18 am-9:10 pm

2 stops11h 52m

$230

Salt Lake CitySt. Louis

SLC - STL

SLCSTL

Salt Lake City

Thu 10/16

10:05 pm-9:07 am

1 stop10h 02m

Lambert-St Louis

Mon 10/20

9:59 pm-10:19 pm

2 stops25h 20m

$252

Salt Lake CityMoline

SLC - MLI

SLCMLI

Salt Lake City

Fri 12/5

1:38 pm-10:59 pm

1 stop8h 21m

Moline Quad-City

Mon 12/8

3:37 pm-11:44 pm

1 stop9h 07m

$259

Salt Lake CityMoline

SLC - MLI

SLCMLI

Salt Lake City

Sat 10/25

7:00 am-4:20 pm

1 stop8h 20m

Moline Quad-City

Sat 11/1

6:00 am-12:16 pm

1 stop7h 16m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

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

Have a flexible travel schedule? Discover the best time to fly to Illinois from Utah 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 Utah to Illinois

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

Currently, August is the cheapest month in which you can book a flight from Utah to Illinois (average of $245). Flying from Utah to Illinois in March is currently the most expensive (average of $321). 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 UT to IL?

Find hourly flight availability from Utah to Illinois. 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 Utah to Illinois as you normally would.

Weekly flight availability from Utah to Illinois

Explore weekly flight availability from Utah to Illinois. 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 USUT to USIL are scheduled on a Monday (33 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (21 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated September 17, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Utah to Illinois 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

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

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

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

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

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

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

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

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

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

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

Overall

8.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Entertainment

7.5

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 Utah to Illinois. 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 Utah to Illinois?

    Airlines like Frontier, American Airlines, and Delta fly from Utah to Illinois in about 8h 20m. The time it takes to get you to your destination can typically vary by up to 10h 04m. There are 1115 mi between Utah and Illinois. Both multi-stop and nonstop flights can be found to your destination and back.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $119. Hawaiian Airlines flights start at $139 while deals on Alaska Airlines start at $145 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Utah to Illinois 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 Utah to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Utah to Illinois (average of $245). Flying from Utah to Illinois in March is currently the most expensive (average of $321). 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 Utah to Illinois

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

Discover the top 7 airlines that operate flights from Utah to Illinois. 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
Allegiant AirCheapest$90Average$180FlexibilityNo cancel feeOn-time88%
FrontierCheapest$92Average$219FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$93Average$249FlexibilityNo cancel feeOn-time65%
DeltaCheapest$174Average$420FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$179Average$511FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$185Average$476FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$200Average$470FlexibilityNo cancel feeOn-time63%

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