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$87+ 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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — ORD
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
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 April 15, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$189
(United Airlines)

One-way from

$87
(Mytrip)

Popular in

July

Cheapest in

September

Average price

$284

Good round-trip deal

$83 or less

Good one-way deal

$57 or less
Provider with most accurate pricing for Knoxville McGhee Tyson-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Chicago (CHI) flights.
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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 ($19 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 April 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 April 15, 2025.

This United Airlines deal was found by Cheapflights users on 4/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/157:00 amTYS - ORD
Nonstop1h 57mUnited Airlines
Sun 5/187:30 amORD - TYS
Nonstop1h 45mUnited Airlines
Deal found 4/14$189
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/87:05 amTYS - MDW
1 stop3h 35mDelta
Thu 5/296:00 amMDW - TYS
1 stop6h 19mDelta
Deal found 4/14$204
This American Airlines deal was found by Cheapflights users on 4/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/21:56 pmTYS - ORD
Nonstop1h 58mAmerican Airlines
Sat 7/511:40 amORD - TYS
Nonstop1h 47mAmerican Airlines
Deal found 4/14$205
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1111:26 amTYS - ORD
1 stop7h 26mDelta
Sun 6/155:35 amORD - TYS
1 stop4h 33mDelta
Deal found 4/14$209
This Frontier deal was found by Cheapflights users on 4/14. 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 4/174:31 pmTYS - MDW
1 stop8h 50mFrontier
Sun 4/206:45 amMDW - TYS
1 stop8h 01mFrontier
Deal found 4/14$221
This Frontier deal was found by Cheapflights users on 4/14. 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 4/174:31 pmTYS - ORD
1 stop8h 39mFrontier
Sun 4/206:45 amORD - TYS
1 stop8h 01mFrontier
Deal found 4/14$221
This Mytrip deal was found by Cheapflights users on 4/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/125:15 pmTYS - ORD
1 stop16h 35mMultiple Airlines
Thu 5/154:35 pmORD - TYS
1 stop18h 41mMultiple Airlines
Deal found 4/14$228
This American Airlines deal was found by Cheapflights users on 4/15. 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.
Thu 6/267:53 pmTYS - PIA
1 stop5h 06mAmerican Airlines
Mon 6/3010:05 amPIA - TYS
1 stop5h 28mAmerican Airlines
Deal found 4/15$229
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/1010:59 amTYS - STL
1 stop6h 19mDelta
Sat 6/145:23 pmSTL - TYS
1 stop5h 36mDelta
Deal found 4/14$229
This United Airlines deal was found by Cheapflights users on 4/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2910:50 amTYS - STL
1 stop4h 52mUnited Airlines
Sat 5/33:43 pmSTL - TYS
1 stop6h 24mUnited Airlines
Deal found 4/14$239
This Mytrip deal was found by Cheapflights users on 4/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/910:00 amTYS - STL
2 stops24h 15mMultiple Airlines
Sun 5/1110:10 amSTL - TYS
1 stop7h 36mMultiple Airlines
Deal found 4/13$240
This United Airlines deal was found by Cheapflights users on 4/15. 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.
Tue 5/277:00 amTYS - PIA
1 stop4h 21mUnited Airlines
Wed 5/285:25 pmPIA - TYS
1 stop4h 15mUnited Airlines
Deal found 4/15$249

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 April 15, 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 - ORD

TYSORD

Knoxville McGhee Tyson

Thu 5/15

7:00 am-7:57 am

Nonstop1h 57m

Chicago O'Hare Intl

Sun 5/18

7:30 am-10:15 am

Nonstop1h 45m

$189

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

Thu 5/8

7:05 am-9:40 am

1 stop3h 35m

Chicago Midway

Thu 5/29

6:00 am-1:19 pm

1 stop6h 19m

$204

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

Wed 7/2

1:56 pm-2:54 pm

Nonstop1h 58m

Chicago O'Hare Intl

Sat 7/5

11:40 am-2:27 pm

Nonstop1h 47m

$205

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

Wed 6/11

7:46 am-12:55 pm

1 stop6h 09m

Chicago O'Hare Intl

Mon 6/16

7:10 am-1:47 pm

1 stop5h 37m

$209

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

Mon 5/12

5:15 pm-8:50 am

1 stop16h 35m

Chicago O'Hare Intl

Thu 5/15

4:35 pm-12:16 pm

1 stop18h 41m

$228

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Thu 6/26

7:53 pm-11:59 pm

1 stop5h 06m

Greater Peoria

Mon 6/30

10:05 am-4:33 pm

1 stop5h 28m

$229

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Tue 6/10

10:59 am-4:18 pm

1 stop6h 19m

Lambert-St Louis

Sat 6/14

5:23 pm-11:59 pm

1 stop5h 36m

$229

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Tue 4/29

10:50 am-2:42 pm

1 stop4h 52m

Lambert-St Louis

Sat 5/3

3:43 pm-11:07 pm

1 stop6h 24m

$239

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Fri 5/9

10:00 am-9:15 am

2 stops24h 15m

Lambert-St Louis

Sun 5/11

10:10 am-6:46 pm

1 stop7h 36m

$240

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

Fri 4/18

12:46 pm-12:21 am

1 stop12h 35m

Chicago Midway

Sun 4/20

6:45 am-3:46 pm

1 stop8h 01m

$242

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 31 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 April 15, 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 April 15, 2025.

The most flights from TYS to USIL are scheduled on a Monday (29 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (15 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 April 15, 2025.
Get a feel of what it's like to fly with Delta, United Airlines and Allegiant Air from Knoxville to Illinois by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,918 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,918 reviews
Delta
8.0
Very good
7,918 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,658 reviews
Delta
8.0
Very good
7,918 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Allegiant Air
7.3
Good
734 reviews
Delta
8.0
Very good
7,918 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,918 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Frontier
6.0
Okay
3,281 reviews
Delta
8.0
Very good
7,918 reviews

Crew

8.5

Boarding

8.2

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 $87. However, be on the lookout for offers from American Airlines 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 (91%), ANA (87%) 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 $1,031, our data indicates the cheapest price to be $115. 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.

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Alternative routes for Knoxville to Illinois

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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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$74Average$83FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$163Average$360FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$181Average$329FlexibilityNo cancel feeOn-time69%
DeltaCheapest$187Average$293FlexibilityNo cancel feeOn-timeN/A

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