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Knoxville

$89+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — TYS
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheap 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 January 21, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/20. 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 7/162:48 pm
MDW
-
TYS
Nonstop1h 30m
Allegiant Air
Sun 7/191:22 pm
TYS
-
MDW
Nonstop1h 36m
Allegiant Air
Deal found 1/20$160
This Kiwi.com deal was found by Cheapflights users on 1/19. 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 7/232:48 pm
MDW
-
TYS
Nonstop1h 30m
Allegiant Air
Sun 7/261:22 pm
TYS
-
MDW
Nonstop1h 36m
Allegiant Air
Deal found 1/19$175
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 2/265:15 am
ORD
-
TYS
1 stop15h 52m
Multiple Airlines
Mon 3/29:36 pm
TYS
-
ORD
1 stop14h 46m
Multiple Airlines
Deal found 1/20$185
This American Airlines deal was found by Cheapflights users on 1/19. 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.
Wed 4/151:51 pm
ORD
-
TYS
Nonstop1h 44m
American Airlines
Tue 4/217:50 am
TYS
-
ORD
Nonstop2h 05m
American Airlines
Deal found 1/19$189
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Tue 3/317:15 am
ORD
-
TYS
Nonstop1h 53m
United Airlines
Sun 4/57:00 am
TYS
-
ORD
Nonstop1h 55m
United Airlines
Deal found 1/20$198
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Thu 4/27:15 am
ORD
-
TYS
Nonstop1h 53m
United Airlines
Sun 4/57:00 am
TYS
-
ORD
Nonstop1h 55m
United Airlines
Deal found 1/20$200
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Fri 2/67:29 pm
ORD
-
TYS
Nonstop1h 40m
American Airlines
Fri 2/134:02 pm
TYS
-
ORD
Nonstop2h 02m
American Airlines
Deal found 1/20$204
This Delta deal was found by Cheapflights users on 1/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/202:05 pm
ORD
-
TYS
1 stop5h 50m
Delta
Fri 2/271:00 pm
TYS
-
ORD
1 stop6h 59m
Delta
Deal found 1/21$209
This Delta deal was found by Cheapflights users on 1/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/144:13 pm
MDW
-
TYS
1 stop6h 39m
Delta
Sun 2/157:38 am
TYS
-
MDW
1 stop6h 08m
Delta
Deal found 1/20$209
This United Airlines deal was found by Cheapflights users on 1/20. 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 3/136:06 pm
ORD
-
TYS
Nonstop1h 41m
United Airlines
Sun 3/157:00 am
TYS
-
ORD
Nonstop2h 00m
United Airlines
Deal found 1/20$212
This Southwest deal was found by Cheapflights users on 1/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2910:05 am
MDW
-
TYS
2 stops8h 35m
Southwest
Sat 5/23:55 pm
TYS
-
MDW
1 stop6h 10m
Southwest
Deal found 1/20$214
This Southwest deal was found by Cheapflights users on 1/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/511:35 am
MDW
-
TYS
1 stop8h 40m
Southwest
Mon 3/97:25 pm
TYS
-
MDW
1 stop5h 40m
Southwest
Deal found 1/20$215

Find flight deals from Illinois to Knoxville

Keep the following information in mind while searching for Illinois to Knoxville flight deals. Data was last updated January 21, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$160
(Kiwi.com)

One-way from

$89
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$271

Good round-trip deal

$204 or less

Good one-way deal

$223 or less
Provider with most accurate pricing for Chicago (CHI)-Knoxville McGhee Tyson flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Knoxville McGhee Tyson flights.
Search Deals
From Illinois to Knoxville McGhee Tyson
Search Deals
One-way flight from Illinois to Knoxville McGhee Tyson
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Illinois to Knoxville McGhee Tyson.
Search Deals
Price to beat on a one-way flight from Illinois to Knoxville McGhee Tyson.
Search Deals

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 January 21, 2026.
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

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Tue 5/5

6:00 pm-8:45 pm

Nonstop1h 45m

Knoxville McGhee Tyson

Sat 5/9

7:00 am-7:56 am

Nonstop1h 56m

$189

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Sat 2/14

6:00 pm-8:37 pm

Nonstop1h 37m

Knoxville McGhee Tyson

Sun 2/15

6:45 am-7:47 am

Nonstop2h 02m

$189

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Fri 4/3

2:06 pm-4:52 pm

Nonstop1h 46m

Knoxville McGhee Tyson

Sun 4/5

7:00 am-7:55 am

Nonstop1h 55m

$200

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Thu 4/2

7:15 am-10:08 am

Nonstop1h 53m

Knoxville McGhee Tyson

Sun 4/5

7:00 am-7:55 am

Nonstop1h 55m

$200

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Tue 2/17

6:45 am-1:51 pm

1 stop6h 06m

Knoxville McGhee Tyson

Tue 2/24

1:00 pm-4:41 pm

1 stop4h 41m

$209

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Sat 7/11

11:10 am-6:17 pm

1 stop6h 07m

Knoxville McGhee Tyson

Tue 7/14

4:00 pm-9:20 pm

1 stop6h 20m

$209

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Wed 4/15

8:55 am-4:49 pm

1 stop6h 54m

Knoxville McGhee Tyson

Tue 4/21

7:46 am-12:41 pm

1 stop5h 55m

$209

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Sun 4/5

1:57 pm-9:06 pm

1 stop6h 09m

Knoxville McGhee Tyson

Sat 4/11

5:40 am-8:30 am

1 stop3h 50m

$209

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Fri 7/10

1:15 pm-6:17 pm

1 stop4h 02m

Knoxville McGhee Tyson

Mon 7/13

7:20 pm-11:57 pm

1 stop5h 37m

$209

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Sun 3/1

6:30 am-12:11 pm

1 stop4h 41m

Knoxville McGhee Tyson

Wed 3/11

5:40 am-8:30 am

1 stop3h 50m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

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 December is currently the most expensive (average of $193). 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 January 21, 2026.

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 21% versus a flight at noon.

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 October 19, 2025.

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 January 21, 2026.

The most flights from USIL to TYS are scheduled on a Monday (20 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (12 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 45m. United Airlines provides one of the quickest options available for as low as $189. The distance between Illinois and Knoxville is about 475 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 ($47), American Airlines ($119), and United Airlines ($119).

  • 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 Envoy Air (88%), Republic Airways (79%) or United Airlines (65%) 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 $274, our data shows the cheapest flight currently is $138. 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 December is currently the most expensive (average of $193). 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
Cherokee
Crossville
Corbin
Morristown
Bryson City
Alcoa
Oak Ridge
Murphy

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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 January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$75Average$142FlexibilityNo cancel feeOn-time88%
DeltaCheapest$138Average$303FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$189Average$410FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$189Average$345FlexibilityNo cancel feeOn-time69%

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