HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$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 3/6. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — ORD
feb. 11 — feb. 181
mar. 2/11
mar. 2/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Knoxville to Illinois with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Knoxville to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated febrero 6, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$189
(United Airlines)

One-way from

$55
(Frontier)

Popular in

March

Cheapest in

September

Average price

$198

Good round-trip deal

$131 or less

Good one-way deal

$287 or less
Provider with most accurate pricing for Knoxville McGhee Tyson-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Knoxville McGhee Tyson-Chicago (CHI) flights.
Search Deals
From Knoxville McGhee Tyson to Illinois
Search Deals
One-way flight from Knoxville McGhee Tyson to Illinois
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($10 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals
Price to beat on a round-trip flight from Knoxville McGhee Tyson to Illinois.
Search Deals
Price to beat on a one-way flight from Knoxville McGhee Tyson to Illinois.
Search Deals

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 febrero 6, 2025.

This United Airlines deal was found by Cheapflights users on 2/5. 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.
mié. 2/199:55 amTYS - ORD
1 stop5h 08mUnited Airlines
sáb. 2/222:10 pmORD - TYS
Nonstop1h 44mUnited Airlines
Deal found 2/5$189
This Delta deal was found by Cheapflights users on 2/6. 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.
mar. 4/15:45 amTYS - STL
1 stop4h 29mDelta
mar. 4/81:48 pmSTL - TYS
1 stop6h 42mDelta
Deal found 2/6$199
This American Airlines deal was found by Cheapflights users on 2/5. 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.
jue. 2/276:55 pmTYS - ORD
Nonstop2h 00mAmerican Airlines
mar. 3/48:32 amORD - TYS
Nonstop1h 42mAmerican Airlines
Deal found 2/5$199
This Delta deal was found by Cheapflights users on 2/6. 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.
jue. 2/277:25 amTYS - MDW
1 stop6h 40mDelta
sáb. 3/15:05 pmMDW - TYS
1 stop4h 17mDelta
Deal found 2/6$204
This Delta deal was found by Cheapflights users on 2/6. 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.
jue. 2/275:45 amTYS - ORD
1 stop3h 48mDelta
sáb. 3/14:58 pmORD - TYS
1 stop4h 24mDelta
Deal found 2/6$204
This Mytrip deal was found by Cheapflights users on 2/6. 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.
lun. 3/244:19 pmTYS - ORD
2 stops18h 40mMultiple Airlines
mié. 3/2610:27 pmORD - TYS
2 stops23h 22mMultiple Airlines
Deal found 2/6$226
This Frontier deal was found by Cheapflights users on 2/5. 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.
jue. 3/64:23 pmTYS - ORD
1 stop9h 00mFrontier
dom. 3/96:45 amORD - TYS
1 stop7h 58mFrontier
Deal found 2/5$230
This American Airlines deal was found by Cheapflights users on 2/5. 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.
vie. 2/217:58 pmTYS - STL
1 stop4h 58mAmerican Airlines
dom. 2/235:37 pmSTL - TYS
1 stop5h 12mAmerican Airlines
Deal found 2/5$239
This Frontier deal was found by Cheapflights users on 2/5. 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.
jue. 4/34:31 pmTYS - MDW
1 stop8h 50mFrontier
jue. 4/106:45 amMDW - TYS
1 stop7h 56mFrontier
Deal found 2/5$260
This United Airlines deal was found by Cheapflights users on 2/5. 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.
mar. 3/49:15 amTYS - STL
1 stop6h 56mUnited Airlines
lun. 3/105:33 pmSTL - TYS
1 stop4h 12mUnited Airlines
Deal found 2/5$289
This United Airlines deal was found by Cheapflights users on 2/5. 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.
vie. 2/217:00 amTYS - PIA
1 stop4h 20mUnited Airlines
mar. 2/255:20 pmPIA - TYS
1 stop4h 40mUnited Airlines
Deal found 2/5$299
This Mytrip deal was found by Cheapflights users on 2/5. 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.
jue. 3/66:00 amTYS - STL
1 stop11h 42mMultiple Airlines
dom. 3/95:38 pmSTL - TYS
3 stops17h 22mMultiple Airlines
Deal found 2/5$305

Find flights from Knoxville to Illinois within your budget

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 febrero 6, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

mié. 2/19

9:55 am-2:03 pm

1 stop5h 08m

Chicago O'Hare Intl

sáb. 2/22

2:10 pm-4:54 pm

Nonstop1h 44m

$189

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

mar. 4/1

5:45 am-9:14 am

1 stop4h 29m

Lambert-St Louis

mar. 4/8

1:48 pm-9:30 pm

1 stop6h 42m

$199

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

jue. 2/27

6:55 pm-7:55 pm

Nonstop2h 00m

Chicago O'Hare Intl

mar. 3/4

8:32 am-11:14 am

Nonstop1h 42m

$199

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

jue. 2/27

7:25 am-1:05 pm

1 stop6h 40m

Chicago Midway

sáb. 3/1

5:05 pm-10:22 pm

1 stop4h 17m

$204

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

jue. 2/27

5:45 am-8:33 am

1 stop3h 48m

Chicago O'Hare Intl

sáb. 3/1

4:58 pm-10:22 pm

1 stop4h 24m

$204

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

lun. 3/24

4:19 pm-9:59 am

2 stops18h 40m

Chicago O'Hare Intl

mié. 3/26

10:27 pm-10:49 pm

2 stops23h 22m

$226

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

jue. 3/6

4:23 pm-12:23 am

1 stop9h 00m

Chicago O'Hare Intl

dom. 3/9

6:45 am-3:43 pm

1 stop7h 58m

$230

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

vie. 2/21

7:58 pm-11:56 pm

1 stop4h 58m

Lambert-St Louis

dom. 2/23

5:37 pm-11:49 pm

1 stop5h 12m

$239

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

jue. 4/3

4:31 pm-12:21 am

1 stop8h 50m

Chicago Midway

jue. 4/10

6:45 am-3:41 pm

1 stop7h 56m

$260

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

mar. 3/4

9:15 am-3:11 pm

1 stop6h 56m

Lambert-St Louis

lun. 3/10

5:33 pm-10:45 pm

1 stop4h 12m

$289

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/6

Showing 1-10 of 26 results
1
2
3

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.

Travel insights for flights from Knoxville to Illinois

Get recent, data-driven insights about flights from Knoxville to Illinois including ideal travel times, pricing trends, and more.

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 $323). 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 febrero 6, 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 febrero 6, 2025.

The most flights from TYS to USIL are scheduled on a Thursday (20 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (16 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 febrero 6, 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
8,388 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

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
8,388 reviews
Delta
8.0
Very good
8,388 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

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
8,879 reviews
Delta
8.0
Very good
8,388 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

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
782 reviews
Delta
8.0
Very good
8,388 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

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
8,388 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

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
3,410 reviews
Delta
8.0
Very good
8,388 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.5

Food

7.3

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 Frontier, with whom users have recently found tickets for as low as $55. However, be on the lookout for offers from Allegiant Air and American Airlines, 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 Republic Airways (90%), United Airlines (89%) or Avianca (87%) 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 $1,196, our data indicates the cheapest price to be $129. The most popular route (Knoxville McGhee Tyson - Chicago O'Hare Intl), is priced around $179.

  • 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 $323). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Knoxville to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Nashville to Orlando flights
Nashville to LaGuardia flights
Nashville to Seattle flights
Nashville to Miami flights
Nashville to Denver flights
Nashville to Las Vegas flights
Nashville to John F Kennedy Intl flights
Nashville to Sky Harbor Intl flights
Nashville to Fort Lauderdale flights
Nashville to Dallas/Fort Worth flights
Nashville to Los Angeles flights
Nashville to Newark flights
Nashville to O'Hare Intl flights
Memphis to Las Vegas flights
Memphis to Orlando flights
Nashville to Tampa flights
Memphis to Denver flights
Memphis to LaGuardia flights
Nashville to Boston flights
Nashville to Hobby flights
Nashville to San Francisco flights
Nashville to Salt Lake City flights
Nashville to Reagan-National flights
Memphis to Hobby flights
Nashville to Austin flights
Memphis to Miami flights
Knoxville to LaGuardia flights
Memphis to John F Kennedy Intl flights
Memphis to Dallas/Fort Worth flights
Memphis to Atlanta flights
Nashville to Baltimore flights
Nashville to Honolulu flights
Nashville to George Bush Intcntl flights
Memphis to O'Hare Intl flights
Memphis to Newark flights
Nashville to Dulles Intl flights
Nashville to Midway flights
Nashville to Raleigh flights
Knoxville to Hobby flights
Memphis to George Bush Intcntl flights
Memphis to Fort Lauderdale flights
Memphis to Los Angeles flights
Nashville to Fort Myers flights
Nashville to New Orleans flights
Nashville to Atlanta flights
Chattanooga to John F Kennedy Intl flights
Chattanooga to Orlando flights
Nashville to Ontario flights
Knoxville to John F Kennedy Intl flights
Memphis to Sky Harbor Intl flights

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 febrero 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$74Average$80FlexibilityNo cancel feeOn-time88%
American AirlinesCheapest$166Average$361FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$179Average$298FlexibilityNo cancel feeOn-time69%
DeltaCheapest$192Average$347FlexibilityNo cancel feeOn-timeN/A
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.