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Illinois

$82+ 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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
SLC — ORD
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$155
(Frontier)

One-way from

$82
(Frontier)

Popular in

May

Cheapest in

November

Average price

$250

Good round-trip deal

$292 or less

Good one-way deal

$168 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. 16% potential increase in price ($64 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 14, 2025.

This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/119:45 pmSLC - STL
1 stop10h 21mFrontier
Sun 9/1410:39 amSTL - SLC
1 stop6h 06mFrontier
Deal found 8/14$155
This FlightHub deal was found by Cheapflights users on 8/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/288:00 amSLC - STL
1 stop24h 07mFrontier
Thu 10/3010:17 amSTL - SLC
1 stop10h 46mFrontier
Deal found 8/13$162
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 9/56:47 pmSLC - ORD
1 stop16h 04mSpirit Airlines
Tue 9/99:00 amORD - SLC
1 stop24h 34mSpirit Airlines
Deal found 8/13$163
This Orbitz deal was found by Cheapflights users on 8/14. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/69:45 pmSLC - STL
1 stop10h 22mFrontier
Thu 10/167:52 pmSTL - SLC
1 stop5h 07mFrontier
Deal found 8/14$163
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Fri 9/1912:54 pmSLC - ORD
1 stop8h 46mFrontier
Tue 9/237:20 amORD - SLC
1 stop6h 26mFrontier
Deal found 8/14$164
This Cheapflightsfares deal was found by Cheapflights users on 8/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/209:29 amSLC - ORD
1 stop11h 03mSpirit Airlines
Mon 9/226:05 pmORD - SLC
1 stop15h 29mSpirit Airlines
Deal found 8/12$165
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1210:05 pmSLC - STL
1 stop10h 02mFrontier
Mon 10/137:52 pmSTL - SLC
1 stop5h 07mFrontier
Deal found 8/14$165
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Wed 9/33:02 pmSLC - ORD
1 stop12h 48mMultiple Airlines
Fri 9/56:00 amORD - SLC
1 stop6h 11mMultiple Airlines
Deal found 8/12$166
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Wed 8/2712:52 pmSLC - ORD
1 stop7h 50mFrontier
Tue 9/27:20 amORD - SLC
1 stop5h 32mFrontier
Deal found 8/12$167
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/34:02 pmSLC - STL
1 stop16h 04mFrontier
Fri 10/109:59 pmSTL - SLC
1 stop21h 44mFrontier
Deal found 8/14$167
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1110:50 amSLC - ORD
1 stop10h 50mFrontier
Sun 9/146:00 amORD - SLC
1 stop6h 11mFrontier
Deal found 8/14$168
This Frontier deal was found by Cheapflights users on 8/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1110:50 amSLC - MDW
1 stop10h 08mFrontier
Mon 9/154:48 pmMDW - SLC
1 stop8h 26mFrontier
Deal found 8/14$168

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 August 14, 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

Thu 9/11

9:45 pm-9:06 am

1 stop10h 21m

Lambert-St Louis

Thu 9/18

10:49 am-3:45 pm

1 stop5h 56m

$155

Salt Lake CitySt. Louis

SLC - STL

SLCSTL

Salt Lake City

Thu 9/11

9:45 pm-9:06 am

1 stop10h 21m

Lambert-St Louis

Sun 9/14

10:39 am-3:45 pm

1 stop6h 06m

$155

Salt Lake CitySt. Louis

SLC - STL

SLCSTL

Salt Lake City

Fri 11/7

4:03 pm-9:07 am

1 stop16h 04m

Lambert-St Louis

Sun 11/9

10:17 am-8:03 pm

1 stop10h 46m

$162

Salt Lake CitySt. Louis

SLC - STL

SLCSTL

Salt Lake City

Tue 10/28

8:00 am-9:07 am

1 stop24h 07m

Lambert-St Louis

Thu 10/30

10:17 am-8:03 pm

1 stop10h 46m

$162

Salt Lake CityChicago

SLC - ORD

SLCORD

Salt Lake City

Fri 9/5

6:47 pm-11:51 am

1 stop16h 04m

Chicago O'Hare Intl

Tue 9/9

9:00 am-8:34 am

1 stop24h 34m

$163

Salt Lake CityChicago

SLC - ORD

SLCORD

Salt Lake City

Tue 9/9

9:29 am-9:32 pm

1 stop11h 03m

Chicago O'Hare Intl

Sat 9/13

8:25 am-10:26 pm

1 stop15h 01m

$163

Salt Lake CitySt. Louis

SLC - STL

SLCSTL

Salt Lake City

Mon 10/6

9:45 pm-9:07 am

1 stop10h 22m

Lambert-St Louis

Thu 10/16

7:52 pm-11:59 pm

1 stop5h 07m

$163

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

Fri 10/17

7:52 pm-11:59 pm

1 stop5h 07m

$163

Salt Lake CitySt. Louis

SLC - STL

SLCSTL

Salt Lake City

Mon 9/15

9:45 pm-9:06 am

1 stop10h 21m

Lambert-St Louis

Fri 9/19

7:55 pm-12:14 am

1 stop5h 19m

$163

Salt Lake CityChicago

SLC - ORD

SLCORD

Salt Lake City

Wed 9/17

9:29 am-9:32 pm

1 stop11h 03m

Chicago O'Hare Intl

Sat 9/20

8:25 am-10:26 pm

1 stop15h 01m

$164

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

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 August 14, 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 August 14, 2025.

The most flights from USUT to USIL are scheduled on a Thursday (33 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (17 on average).

How much does it cost to fly round-trip from Utah to Illinois?

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 August 14, 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
4,244 reviews

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,980 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,217 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

  • 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$85Average$190FlexibilityNo cancel feeOn-time62%
Allegiant AirCheapest$90Average$179FlexibilityNo cancel feeOn-time88%
Spirit AirlinesCheapest$100Average$274FlexibilityNo cancel feeOn-time65%
DeltaCheapest$169Average$407FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$179Average$511FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$180Average$492FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$200Average$464FlexibilityNo cancel feeOn-time63%

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