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$49+ Cheap flights from Tennessee 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
BNA — ORD
Aug 6 — Aug 131
Wed 8/6
Wed 8/13
1 adult, Economy
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Cheap flight deals from Tennessee to Illinois

Keep the following information in mind while searching for Tennessee to Illinois flight deals. Data was last updated August 1, 2025.

Round-trip from

$82
(Cheapflightsfares)

One-way from

$49
(Southwest)

Popular in

March

Cheapest in

August

Average price

$136

Good round-trip deal

$60 or less

Good one-way deal

$58 or less
From Tennessee to Illinois
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One-way flight from Tennessee to Illinois
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Highest demand for flights based on searches. 9% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Tennessee to Illinois.
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Price to beat on a one-way flight from Tennessee to Illinois.
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Find flight deals from Tennessee to Illinois

Cheapest flights from Tennessee to Illinois
Explore the most affordable flight options available from Tennessee to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 1, 2025.

This Mytrip deal was found by Cheapflights users on 7/30. 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 8/41:23 pmTYS - MDW
Nonstop1h 33mAllegiant Air
Fri 8/82:46 pmMDW - TYS
Nonstop1h 26mAllegiant Air
Deal found 7/30$79
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/175:19 pmBNA - ORD
1 stop6h 26mSpirit Airlines
Sun 10/1912:05 pmORD - BNA
Nonstop1h 30mSpirit Airlines
Deal found 7/30$82
This Frontier deal was found by Cheapflights users on 7/31. 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 8/219:54 pmBNA - ORD
Nonstop2h 01mFrontier
Mon 8/257:18 pmORD - BNA
Nonstop1h 51mFrontier
Deal found 7/31$92
This Southwest deal was found by Cheapflights users on 7/31. 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 8/217:00 pmBNA - MDW
Nonstop1h 35mSouthwest
Mon 8/2512:00 pmMDW - BNA
Nonstop1h 25mSouthwest
Deal found 7/31$97
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 9/139:15 amBNA - ORD
Nonstop1h 46mAmerican Airlines
Sat 9/2010:11 amORD - BNA
Nonstop1h 31mAmerican Airlines
Deal found 7/30$97
This Priceline deal was found by Cheapflights users on 8/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/219:54 pmBNA - ORD
Nonstop2h 01mMultiple Airlines
Mon 8/255:16 pmORD - BNA
1 stop6h 04mMultiple Airlines
Deal found 8/1$100
This KAYAK deal was found by Cheapflights users on 7/31. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/152:35 pmBNA - STL
1 stop4h 06mSouthern / Mokulele
Sat 8/169:50 amSTL - BNA
1 stop4h 05mSouthern / Mokulele
Deal found 7/31$157
This FlightHub deal was found by Cheapflights users on 7/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/52:35 pmBNA - STL
1 stop4h 01mMultiple Airlines
Sun 9/712:05 pmSTL - BNA
1 stop22h 19mMultiple Airlines
Deal found 7/30$166
This Southwest deal was found by Cheapflights users on 7/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/98:15 amBNA - STL
Nonstop1h 20mSouthwest
Wed 9/105:50 pmSTL - BNA
Nonstop1h 10mSouthwest
Deal found 7/30$177
This American Airlines deal was found by Cheapflights users on 8/1. 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.
Sat 8/2310:33 amBNA - STL
1 stop8h 48mAmerican Airlines
Mon 8/256:00 amSTL - BNA
1 stop7h 32mAmerican Airlines
Deal found 8/1$179
This FlightHub deal was found by Cheapflights users on 7/31. 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 8/285:03 pmBNA - STL
1 stop20h 29mSpirit Airlines
Thu 9/410:35 amSTL - BNA
1 stop6h 00mSpirit Airlines
Deal found 7/31$180
This Trip.com deal was found by Cheapflights users on 7/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/81:23 pmTYS - MDW
Nonstop1h 33mMultiple Airlines
Sat 8/92:44 pmMDW - TYS
1 stop24h 45mMultiple Airlines
Deal found 7/29$181

Cheapflights Fare Finder

 
Customize your flight search to find flights from Tennessee 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 August 1, 2025.
Use the filters below to find and compare flights from Tennessee to Illinois that are best for you.

Fly from

Tennessee

Fly to

Illinois

Route

Depart

Return

Price

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

Fri 8/22

2:29 pm-3:02 pm

Nonstop1h 33m

Chicago Midway

Mon 8/25

3:52 pm-6:20 pm

Nonstop1h 28m

$82

NashvilleChicago

BNA - ORD

BNAORD

Nashville Intl

Fri 10/17

5:19 pm-11:45 pm

1 stop6h 26m

Chicago O'Hare Intl

Sun 10/19

12:05 pm-1:35 pm

Nonstop1h 30m

$82

NashvilleChicago

BNA - ORD

BNAORD

Nashville Intl

Thu 8/21

9:54 pm-11:55 pm

Nonstop2h 01m

Chicago O'Hare Intl

Mon 8/25

7:18 pm-9:09 pm

Nonstop1h 51m

$92

NashvilleChicago

BNA - MDW

BNAMDW

Nashville Intl

Thu 8/21

7:00 pm-8:35 pm

Nonstop1h 35m

Chicago Midway

Mon 8/25

12:00 pm-1:25 pm

Nonstop1h 25m

$97

NashvilleChicago

BNA - ORD

BNAORD

Nashville Intl

Sat 9/13

9:15 am-11:01 am

Nonstop1h 46m

Chicago O'Hare Intl

Sat 9/20

10:11 am-11:42 am

Nonstop1h 31m

$97

NashvilleChicago

BNA - ORD

BNAORD

Nashville Intl

Thu 8/21

9:54 pm-11:55 pm

Nonstop2h 01m

Chicago O'Hare Intl

Mon 8/25

5:16 pm-11:20 pm

1 stop6h 04m

$100

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Fri 8/15

2:35 pm-6:41 pm

1 stop4h 06m

Lambert-St Louis

Sat 8/16

9:50 am-1:55 pm

1 stop4h 05m

$157

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Fri 9/5

2:35 pm-6:36 pm

1 stop4h 01m

Lambert-St Louis

Sun 9/7

12:05 pm-10:24 am

1 stop22h 19m

$166

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Tue 9/9

8:15 am-9:35 am

Nonstop1h 20m

Lambert-St Louis

Wed 9/10

5:50 pm-7:00 pm

Nonstop1h 10m

$177

NashvilleSt. Louis

BNA - STL

BNASTL

Nashville Intl

Sat 8/23

10:33 am-7:21 pm

1 stop8h 48m

Lambert-St Louis

Mon 8/25

6:00 am-1:32 pm

1 stop7h 32m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

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

Have a flexible travel schedule? Discover the best time to fly to Illinois from Tennessee 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 Tennessee to Illinois

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

Currently, August is the cheapest month in which you can book a flight from Tennessee to Illinois (average of $245). Flying from Tennessee 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 TN to IL?

Find hourly flight availability from Tennessee 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 August 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Tennessee to Illinois as you normally would.

Weekly flight availability from Tennessee to Illinois

Explore weekly flight availability from Tennessee 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 August 1, 2025.

The most flights from USTN to USIL are scheduled on a Thursday (65 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (26 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 August 1, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Tennessee to Illinois to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,981 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,900 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Allegiant Air
7.2
Good
702 reviews
Southwest
8.0
Very good
4,246 reviews

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Overall

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from Tennessee to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Tennessee to Illinois one-way?

    One-way options have recently been found by users for as low as $49 on Southwest. Other airlines that offer cheap prices include United Airlines from $49 and Spirit Airlines from $50 one-way.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Tennessee to Illinois (average of $245). Flying from Tennessee 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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Alternative routes for Tennessee to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 8 airlines flying from Tennessee to Illinois

Discover the top 8 airlines that operate flights from Tennessee 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 August 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$36Average$101FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$43Average$84FlexibilityNo cancel feeOn-time65%
Allegiant AirCheapest$58Average$81FlexibilityNo cancel feeOn-time88%
SouthwestCheapest$98Average$263FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$99Average$332FlexibilityNo cancel feeOn-time71%
DeltaCheapest$110Average$371FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$119Average$331FlexibilityNo cancel feeOn-time69%
Denver Air ConnectionCheapest$182Average$202FlexibilityNo cancel feeOn-timeN/A

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