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$49+ 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — ORD
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
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 July 1, 2025.

Round-trip from

$112
(Booking.com)

One-way from

$49
(Booking.com)

Popular in

April

Cheapest in

September

Average price

$271

Good round-trip deal

$79 or less

Good one-way deal

$58 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. 9% potential increase in price ($24 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 July 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 July 1, 2025.

This Booking.com deal was found by Cheapflights users on 7/1. 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 8/151:31 pmTYS - MDW
Nonstop1h 33mAllegiant Air
Mon 8/182:54 pmMDW - TYS
Nonstop1h 28mAllegiant Air
Deal found 7/1$112
This United Airlines deal was found by Cheapflights users on 7/1. 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 8/157:00 amTYS - ORD
Nonstop1h 57mUnited Airlines
Sun 8/247:47 pmORD - TYS
Nonstop1h 50mUnited Airlines
Deal found 7/1$189
This American Airlines deal was found by Cheapflights users on 6/30. 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 8/2212:56 pmTYS - ORD
Nonstop1h 53mAmerican Airlines
Mon 8/251:55 pmORD - TYS
Nonstop1h 41mAmerican Airlines
Deal found 6/30$190
This Mytrip deal was found by Cheapflights users on 6/30. 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.
Mon 8/186:00 amTYS - ORD
1 stop11h 10mMultiple Airlines
Mon 8/256:56 amORD - TYS
1 stop15h 16mMultiple Airlines
Deal found 6/30$197
This FlightHub deal was found by Cheapflights users on 6/28. 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.
Thu 10/168:22 pmTYS - MDW
1 stop27h 16mMultiple Airlines
Mon 10/2012:08 pmMDW - TYS
Nonstop1h 24mMultiple Airlines
Deal found 6/28$206
This Delta deal was found by Cheapflights users on 7/1. 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 8/156:14 pmTYS - MDW
1 stop4h 30mDelta
Mon 8/1812:43 pmMDW - TYS
1 stop6h 23mDelta
Deal found 7/1$209
This Delta deal was found by Cheapflights users on 7/1. 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 8/157:16 pmTYS - ORD
1 stop5h 40mDelta
Sat 8/237:05 amORD - TYS
1 stop5h 07mDelta
Deal found 7/1$209
This Priceline deal was found by Cheapflights users on 6/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/105:25 pmTYS - ORD
1 stop7h 45mFrontier
Sun 7/135:40 amORD - TYS
1 stop9h 49mFrontier
Deal found 6/30$212
This American Airlines deal was found by Cheapflights users on 7/1. 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 8/227:35 pmTYS - PIA
1 stop4h 27mAmerican Airlines
Mon 8/2510:07 amPIA - TYS
1 stop5h 29mAmerican Airlines
Deal found 7/1$229
This Delta deal was found by Cheapflights users on 7/1. 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 8/14:02 pmTYS - STL
1 stop6h 40mDelta
Sun 8/36:00 amSTL - TYS
1 stop4h 08mDelta
Deal found 7/1$229
This American Airlines deal was found by Cheapflights users on 6/29. 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 8/16:22 pmTYS - MLI
1 stop5h 54mAmerican Airlines
Fri 8/86:20 amMLI - TYS
1 stop6h 18mAmerican Airlines
Deal found 6/29$249
This United Airlines deal was found by Cheapflights users on 6/30. 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 7/157:00 amTYS - STL
1 stop6h 27mUnited Airlines
Sat 7/195:30 pmSTL - TYS
1 stop4h 05mUnited Airlines
Deal found 6/30$273

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 July 1, 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

Fri 8/15

1:31 pm-2:04 pm

Nonstop1h 33m

Chicago Midway

Mon 8/18

2:54 pm-5:22 pm

Nonstop1h 28m

$112

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

Fri 8/15

7:00 am-7:57 am

Nonstop1h 57m

Chicago O'Hare Intl

Sun 8/24

7:47 pm-10:37 pm

Nonstop1h 50m

$189

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

Fri 8/22

12:56 pm-1:49 pm

Nonstop1h 53m

Chicago O'Hare Intl

Mon 8/25

1:55 pm-4:36 pm

Nonstop1h 41m

$190

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

Mon 8/18

6:00 am-4:10 pm

1 stop11h 10m

Chicago O'Hare Intl

Mon 8/25

6:56 am-11:12 pm

1 stop15h 16m

$197

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

Thu 10/16

8:22 pm-10:38 pm

1 stop27h 16m

Chicago Midway

Mon 10/20

12:08 pm-2:32 pm

Nonstop1h 24m

$206

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

Fri 8/15

6:14 pm-9:44 pm

1 stop4h 30m

Chicago Midway

Sun 8/24

6:04 am-11:03 am

1 stop3h 59m

$209

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

Fri 8/15

12:25 pm-6:05 pm

1 stop6h 40m

Chicago O'Hare Intl

Mon 8/18

5:45 am-1:08 pm

1 stop6h 23m

$209

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Fri 8/22

7:35 pm-11:02 pm

1 stop4h 27m

Greater Peoria

Mon 8/25

10:07 am-4:36 pm

1 stop5h 29m

$229

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Fri 8/1

4:02 pm-9:42 pm

1 stop6h 40m

Lambert-St Louis

Sun 8/3

6:00 am-11:08 am

1 stop4h 08m

$229

KnoxvilleMoline

TYS - MLI

TYSMLI

Knoxville McGhee Tyson

Fri 8/1

6:22 pm-11:16 pm

1 stop5h 54m

Moline Quad-City

Fri 8/8

6:20 am-1:38 pm

1 stop6h 18m

$249

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 34 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 July 1, 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 July 1, 2025.

The most flights from TYS to USIL are scheduled on a Tuesday (31 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (10 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 July 1, 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
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

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
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

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
8,858 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

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
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

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
710 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

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!
Frontier
5.9
Fair
3,291 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

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.

  • 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 $49. 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 Avianca (97%), Republic Airways (95%) or ANA (93%) 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 $1,657, our data indicates the cheapest price to be $142. 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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$74Average$84FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$164Average$358FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$183Average$329FlexibilityNo cancel feeOn-time69%
DeltaCheapest$233Average$373FlexibilityNo cancel feeOn-timeN/A

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