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$55+ Cheap flights from Knoxville (TYS) 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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — ORD
oct. 17 — oct. 241
vie. 10/17
vie. 10/24
1 adult, Economy
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Cheap flight deals from Knoxville to Illinois

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

Round-trip from

$113
(Mytrip)

One-way from

$55
(Cheapflightsfares)

Popular in

July

Cheapest in

February

Average price

$219

Good round-trip deal

$82 or less

Good one-way deal

$77 or less
From Knoxville McGhee Tyson to Illinois
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One-way flight from Knoxville McGhee Tyson to Illinois
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Highest demand for flights based on searches. 7% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% 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 Knoxville McGhee Tyson to Illinois.
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Price to beat on a one-way flight from Knoxville McGhee Tyson to Illinois.
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Find flight deals from Knoxville to Illinois

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

This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/196:24 pmTYS - MDW
Nonstop1h 36mAllegiant Air
lun. 9/227:50 pmMDW - TYS
Nonstop1h 31mAllegiant Air
Deal found 9/15$98
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/226:24 pmTYS - MDW
Nonstop1h 36mAllegiant Air
vie. 9/267:50 pmMDW - TYS
Nonstop1h 31mAllegiant Air
Deal found 9/15$103
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/196:24 pmTYS - MDW
Nonstop1h 36mAllegiant Air
lun. 9/293:16 pmMDW - TYS
Nonstop1h 31mAllegiant Air
Deal found 9/15$110
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/315:44 pmTYS - MDW
Nonstop1h 32mAllegiant Air
vie. 11/72:57 pmMDW - TYS
Nonstop1h 25mAllegiant Air
Deal found 9/16$113
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.
vie. 10/1710:44 amTYS - MDW
Nonstop1h 32mAllegiant Air
lun. 10/2012:08 pmMDW - TYS
Nonstop1h 24mAllegiant Air
Deal found 9/15$122
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/226:24 pmTYS - MDW
Nonstop1h 36mAllegiant Air
lun. 9/293:16 pmMDW - TYS
Nonstop1h 31mAllegiant Air
Deal found 9/17$134
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 10/1310:46 amTYS - MDW
Nonstop1h 32mAllegiant Air
lun. 10/2012:08 pmMDW - TYS
Nonstop1h 24mAllegiant Air
Deal found 9/15$138
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/196:24 pmTYS - MDW
Nonstop1h 36mAllegiant Air
vie. 9/267:50 pmMDW - TYS
Nonstop1h 31mAllegiant Air
Deal found 9/17$150
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.
vie. 10/245:59 pmTYS - MDW
1 stop24h 14mMultiple Airlines
lun. 10/278:24 pmMDW - TYS
Nonstop1h 24mMultiple Airlines
Deal found 9/16$151
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/1010:44 amTYS - MDW
Nonstop1h 32mAllegiant Air
vie. 10/1712:06 pmMDW - TYS
Nonstop1h 24mAllegiant Air
Deal found 9/16$159
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/191:13 pmTYS - ORD
Nonstop2h 03mAmerican Airlines
sáb. 11/226:34 pmORD - TYS
Nonstop1h 47mAmerican Airlines
Deal found 9/15$189
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/97:00 amTYS - ORD
Nonstop1h 55mUnited Airlines
dom. 10/128:00 pmORD - TYS
Nonstop1h 50mUnited Airlines
Deal found 9/15$192

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville 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 septiembre 17, 2025.
Use the filters below to find and compare flights from Knoxville to Illinois that are best for you.

Fly from

Knoxville

Fly to

Illinois

Route

Depart

Return

Price

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

vie. 10/24

5:59 pm-5:13 pm

1 stop24h 14m

Chicago Midway

lun. 10/27

8:24 pm-10:48 pm

Nonstop1h 24m

$151

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

jue. 11/20

8:26 am-9:30 am

Nonstop2h 04m

Chicago O'Hare Intl

dom. 11/23

7:20 am-10:05 am

Nonstop1h 45m

$189

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

jue. 10/9

7:00 am-7:55 am

Nonstop1h 55m

Chicago O'Hare Intl

dom. 10/12

8:00 pm-10:50 pm

Nonstop1h 50m

$192

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

lun. 10/6

10:46 am-11:18 am

Nonstop1h 32m

Chicago Midway

lun. 10/13

12:08 pm-2:32 pm

Nonstop1h 24m

$196

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

jue. 9/25

8:30 am-1:11 pm

2 stops29h 41m

Chicago Midway

lun. 9/29

3:16 pm-5:47 pm

Nonstop1h 31m

$203

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

vie. 10/24

12:47 pm-6:25 pm

1 stop6h 38m

Chicago Midway

mar. 10/28

5:04 pm-11:07 pm

1 stop5h 03m

$209

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

mié. 10/15

12:47 pm-6:25 pm

1 stop6h 38m

Chicago Midway

mié. 10/22

6:00 am-10:45 am

1 stop3h 45m

$209

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

mié. 10/22

5:44 am-9:40 am

1 stop4h 56m

Chicago Midway

sáb. 10/25

4:23 pm-11:07 pm

1 stop5h 44m

$209

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

vie. 10/24

8:10 pm-11:58 pm

1 stop4h 48m

Chicago O'Hare Intl

lun. 10/27

5:20 am-10:45 am

1 stop4h 25m

$209

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

mié. 11/19

5:26 pm-10:30 pm

1 stop6h 04m

Chicago O'Hare Intl

sáb. 11/22

2:30 pm-8:00 pm

1 stop4h 30m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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

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

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

Currently, August is the cheapest month in which you can book a flight from Knoxville to Illinois (average of $245). Flying from Knoxville 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 TYS to IL?

Find hourly flight availability from Knoxville 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 septiembre 17, 2025.

When flying from Knoxville to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Knoxville to Illinois

Explore weekly flight availability from Knoxville 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 septiembre 17, 2025.

The most flights from TYS 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 (13 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 septiembre 17, 2025.
Read through reviews of airlines operating flights from Knoxville to Illinois, such as Delta, United Airlines, and American Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,961 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,961 reviews
Delta
8.0
Very good
7,961 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,926 reviews
Delta
8.0
Very good
7,961 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,961 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Allegiant Air
7.2
Good
699 reviews
Delta
8.0
Very good
7,961 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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

  • What airport do you fly from for flights from Knoxville to Illinois?

    If you book a flight to Illinois from Knoxville, you will be flying from McGhee Tyson, which is the city’s only airport. Knoxville McGhee Tyson (TYS) is located 11.3 mi from the center of Knoxville.

  • How long is the flight from Knoxville to Illinois?

    For as low as $196, United Airlines can have you in Illinois from Knoxville in 1h 32m. The distance between Knoxville and Illinois is about 460 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is Allegiant Air, with whom users have recently found tickets for as low as $55. However, be on the lookout for offers from Frontier and Delta, as they are both options that can get you from Knoxville to Illinois for a low price.

  • What are the most popular routes from Knoxville to Illinois?

    When deciding which route to take from Knoxville to Illinois consider Knoxville McGhee Tyson - Chicago O'Hare Intl, Knoxville McGhee Tyson - Chicago Midway or Knoxville McGhee Tyson - Lambert-St Louis as they are the most popular.

  • What are the most reliable airlines from Knoxville to Illinois?

    No one likes to see their flight delayed. When booking a flight from Knoxville to Illinois consider choosing GoJet (91%), Avianca (90%) or Republic Airways (83%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Knoxville to Illinois?

    Looking for the cheapest flight from Knoxville to Illinois? While on average our users pay $1,124, our data indicates the cheapest price to be $128. The most popular route (Knoxville McGhee Tyson - Chicago O'Hare Intl), is priced around $189.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Knoxville to Illinois (average of $245). Flying from Knoxville 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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Top 4 airlines flying from Knoxville to Illinois

Discover the top 4 airlines that operate flights from Knoxville 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 septiembre 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$60Average$91FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$188Average$381FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$194Average$338FlexibilityNo cancel feeOn-time69%
DeltaCheapest$233Average$373FlexibilityNo cancel feeOn-timeN/A

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