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$53+ Cheap flights from Illinois to Knoxville (TYS)

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — TYS
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
1 adult, Economy
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Cheap flight deals from Illinois to Knoxville

Keep the following information in mind while searching for Illinois to Knoxville flight deals. Data was last updated October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$136
(Cheapflightsfares)

One-way from

$53
(Cheapflightsfares)

Popular in

March

Cheapest in

September

Average price

$285

Good round-trip deal

$102 or less

Good one-way deal

$55 or less
Provider with most accurate pricing for Chicago (CHI)-Knoxville McGhee Tyson flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Knoxville McGhee Tyson flights.
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From Illinois to Knoxville McGhee Tyson
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One-way flight from Illinois to Knoxville McGhee Tyson
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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. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Illinois to Knoxville McGhee Tyson.
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Price to beat on a one-way flight from Illinois to Knoxville McGhee Tyson.
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Find flight deals from Illinois to Knoxville

Cheapest flights from Illinois to Knoxville
Explore the most affordable flight options available from Illinois to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 14, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 10/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/242:45 pmMDW - TYS
Nonstop1h 24mAllegiant Air
Mon 10/277:02 pmTYS - MDW
Nonstop1h 32mAllegiant Air
Deal found 10/13$136
This Cheapflightsfares deal was found by Cheapflights users on 10/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/72:57 pmMDW - TYS
Nonstop1h 25mAllegiant Air
Mon 11/102:47 pmTYS - MDW
Nonstop1h 35mAllegiant Air
Deal found 10/13$144
This Cheapflightsfares deal was found by Cheapflights users on 10/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/143:27 pmMDW - TYS
Nonstop1h 25mAllegiant Air
Mon 11/172:47 pmTYS - MDW
Nonstop1h 35mAllegiant Air
Deal found 10/13$155
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Mon 10/2012:08 pmMDW - TYS
Nonstop1h 24mMultiple Airlines
Fri 10/245:59 pmTYS - MDW
1 stop24h 14mMultiple Airlines
Deal found 10/13$156
This Cheapflightsfares deal was found by Cheapflights users on 10/13. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1712:06 pmMDW - TYS
Nonstop1h 24mAllegiant Air
Mon 10/2010:46 amTYS - MDW
Nonstop1h 32mAllegiant Air
Deal found 10/13$175
This Kiwi.com deal was found by Cheapflights users on 10/13. 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 11/143:27 pmMDW - TYS
Nonstop1h 25mMultiple Airlines
Mon 11/172:22 pmTYS - MDW
1 stop7h 09mMultiple Airlines
Deal found 10/13$176
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Mon 10/2012:08 pmMDW - TYS
Nonstop1h 24mMultiple Airlines
Thu 10/237:20 amTYS - MDW
1 stop10h 22mMultiple Airlines
Deal found 10/13$178
This Frontier deal was found by Cheapflights users on 10/12. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/257:52 pmSTL - TYS
1 stop22h 40mFrontier
Mon 10/278:17 pmTYS - STL
1 stop13h 50mFrontier
Deal found 10/12$179
This American Airlines deal was found by Cheapflights users on 10/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:48 pmORD - TYS
Nonstop1h 52mAmerican Airlines
Sat 12/65:45 pmTYS - ORD
Nonstop2h 07mAmerican Airlines
Deal found 10/12$189
This Kiwi.com deal was found by Cheapflights users on 10/12. 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.
Mon 11/32:45 pmMDW - TYS
Nonstop1h 24mMultiple Airlines
Thu 11/69:00 amTYS - MDW
2 stops14h 03mMultiple Airlines
Deal found 10/12$192
This United Airlines deal was found by Cheapflights users on 10/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/78:04 pmORD - TYS
Nonstop1h 51mUnited Airlines
Sun 11/96:45 amTYS - ORD
Nonstop2h 01mUnited Airlines
Deal found 10/13$194
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Mon 11/105:15 amORD - TYS
1 stop16h 59mMultiple Airlines
Mon 11/179:09 pmTYS - ORD
1 stop13h 38mMultiple Airlines
Deal found 10/13$198

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Knoxville 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 October 14, 2025.
Use the filters below to find and compare flights from Illinois to Knoxville that are best for you.

Fly from

Illinois

Fly to

Knoxville

Route

Depart

Return

Price

ChicagoKnoxville

MDW - TYS

MDWTYS

Chicago Midway

Fri 11/7

2:57 pm-5:22 pm

Nonstop1h 25m

Knoxville McGhee Tyson

Mon 11/10

2:47 pm-3:22 pm

Nonstop1h 35m

$136

ChicagoKnoxville

MDW - TYS

MDWTYS

Chicago Midway

Fri 11/14

3:27 pm-5:52 pm

Nonstop1h 25m

Knoxville McGhee Tyson

Mon 11/17

2:47 pm-3:22 pm

Nonstop1h 35m

$155

ChicagoKnoxville

MDW - TYS

MDWTYS

Chicago Midway

Fri 10/17

12:06 pm-2:30 pm

Nonstop1h 24m

Knoxville McGhee Tyson

Mon 10/20

10:46 am-11:18 am

Nonstop1h 32m

$175

St. LouisKnoxville

STL - TYS

STLTYS

Lambert-St Louis

Sat 10/25

7:52 pm-7:32 pm

1 stop22h 40m

Knoxville McGhee Tyson

Mon 10/27

8:17 pm-9:07 am

1 stop13h 50m

$179

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Fri 11/7

8:04 pm-10:55 pm

Nonstop1h 51m

Knoxville McGhee Tyson

Mon 11/10

8:26 am-9:30 am

Nonstop2h 04m

$189

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Tue 11/11

7:20 am-10:05 am

Nonstop1h 45m

Knoxville McGhee Tyson

Tue 11/18

10:50 am-11:53 am

Nonstop2h 03m

$189

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Thu 11/6

5:50 pm-8:33 pm

Nonstop1h 43m

Knoxville McGhee Tyson

Sun 11/9

6:45 am-7:46 am

Nonstop2h 01m

$189

ChicagoKnoxville

MDW - TYS

MDWTYS

Chicago Midway

Mon 11/3

2:45 pm-5:09 pm

Nonstop1h 24m

Knoxville McGhee Tyson

Thu 11/6

9:00 am-10:03 pm

2 stops14h 03m

$192

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Sat 11/1

8:04 pm-10:55 pm

Nonstop1h 51m

Knoxville McGhee Tyson

Tue 11/4

1:52 pm-2:53 pm

Nonstop2h 01m

$194

ChicagoKnoxville

MDW - TYS

MDWTYS

Chicago Midway

Fri 11/14

3:27 pm-5:52 pm

Nonstop1h 25m

Knoxville McGhee Tyson

Mon 11/17

2:22 pm-10:11 pm

2 stops8h 49m

$201

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/13

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

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

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

Currently, June is the cheapest month in which you can book a flight from Illinois to Knoxville (average of $62). Flying from Illinois to Knoxville in March is currently the most expensive (average of $190). 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 TYS?

Find hourly flight availability from Illinois to Knoxville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 14, 2025.

When flying from Illinois to Knoxville, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 61% versus a flight in the morning.

What is the cheapest day to fly from Illinois to Knoxville?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Knoxville. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to Knoxville flight should consider departing on Thursday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Illinois to Knoxville

Explore weekly flight availability from Illinois to Knoxville. 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 October 14, 2025.

The most flights from USIL to TYS are scheduled on a Monday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (24 on average).

Related info for your journey

Find useful and relevant information for your journey from Illinois to Knoxville. 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 into for flights to Knoxville from Illinois?

    Knoxville McGhee Tyson (TYS), located 11.3 mi from the city center, is the airport you fly into when you book flights from Illinois to Knoxville.

  • How long is the flight from Illinois to Knoxville?

    A quick flight from Illinois to Knoxville can take about 1h 25m. Allegiant Air provides one of the quickest options available for as low as $136. The distance between Illinois and Knoxville 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 Illinois to Knoxville one-way?

    The cheapest airlines for a one-way flight from Illinois to Knoxville are Allegiant Air ($53), Frontier ($116), and American Airlines ($125).

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

    While some choose either Chicago Midway - Knoxville McGhee Tyson or Lambert-St Louis - Knoxville McGhee Tyson, Chicago O'Hare Intl - Knoxville McGhee Tyson is the most popular route from Illinois to Knoxville.

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

    No one likes to see their flight delayed. When booking a flight from Illinois to Knoxville consider choosing GoJet (93%), Republic Airways (83%) or Envoy Air (79%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Illinois to Knoxville?

    While on average a flight from Illinois to Knoxville is generally $293, our data shows the cheapest flight currently is $128. When looking at the most popular route, (Chicago O'Hare Intl - Knoxville McGhee Tyson), you can expect to pay $189 for that flight.

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

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

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

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

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

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

    Currently, June is the cheapest month in which you can book a flight from Illinois to Knoxville (average of $62). Flying from Illinois to Knoxville in March is currently the most expensive (average of $190). 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

Traveling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Morristown
Cherokee
Corbin
Alcoa
Oak Ridge
Murphy

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Alternative routes for Illinois to Knoxville

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Top 4 airlines flying from Illinois to Knoxville

Discover the top 4 airlines that operate flights from Illinois to Knoxville. 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 October 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$80Average$124FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$184Average$355FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$189Average$361FlexibilityNo cancel feeOn-time69%
DeltaCheapest$193Average$333FlexibilityNo cancel feeOn-timeN/A

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