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Cheap flights from Illinois to Knoxville from $51

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Knoxville departing on 8/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to Knoxville

Cheap round-trip flights

Enter your travel dates to find the best prices.
Allegiant Air Logo
12:36 pm - 3:01 pm
MDW
-
TYS
1h 25mnonstop
Allegiant Air Logo
12:04 pm - 12:36 pm
TYS
-
MDW
1h 32mnonstop
$144Allegiant Air
Fri, Oct 9 - Mon, Oct 12
Allegiant Air Logo
2:48 pm - 5:18 pm
MDW
-
TYS
1h 30mnonstop
Allegiant Air Logo
1:22 pm - 1:58 pm
TYS
-
MDW
1h 36mnonstop
$145Allegiant Air
Thu, Jul 23 - Sun, Aug 2
Delta Logo
6:00 am - 11:01 am
STL
-
TYS
4h 01m
1 stop
Delta Logo
5:45 am - 8:49 am
TYS
-
STL
4h 04m
1 stop
$211Delta
Tue, Oct 27 - Tue, Nov 3
Delta Logo
1:04 pm - 8:10 pm
STL
-
TYS
6h 06m
1 stop
Delta Logo
7:41 pm - 11:58 pm
TYS
-
STL
5h 17m
1 stop
$214Delta
Sat, Aug 8 - Mon, Aug 10
Multiple Airlines Logo
8:52 pm - 8:21 pm
ORD
-
TYS
22h 29m
1 stop
Multiple Airlines Logo
6:29 pm - 11:10 pm
TYS
-
ORD
29h 41m
1 stop
$214Multiple Airlines
Sat, Aug 1 - Mon, Aug 10
Southwest Logo
6:50 am - 1:15 pm
STL
-
TYS
5h 25m
1 stop
Southwest Logo
6:50 am - 3:30 pm
TYS
-
STL
9h 40m
2 stops
$216Southwest
Sat, Sep 12 - Sat, Sep 19
Multiple Airlines Logo
8:05 am - 12:06 pm
ORD
-
TYS
27h 01m
1 stop
Multiple Airlines Logo
5:03 pm - 12:15 pm
TYS
-
ORD
20h 12m
1 stop
$219Multiple Airlines
Tue, Aug 11 - Sat, Aug 15
Southwest Logo
8:25 am - 5:40 pm
STL
-
TYS
8h 15m
2 stops
Southwest Logo
6:50 am - 3:30 pm
TYS
-
STL
9h 40m
2 stops
$221Southwest
Sat, Sep 12 - Sat, Sep 19
United Airlines Logo
6:55 am - 9:43 am
ORD
-
TYS
1h 48mnonstop
United Airlines Logo
6:00 am - 6:59 am
TYS
-
ORD
1h 59mnonstop
$249United Airlines
Wed, Aug 5 - Sun, Aug 9
United Airlines Logo
1:13 pm - 8:44 pm
PIA
-
TYS
6h 31m
1 stop
United Airlines Logo
6:00 am - 10:09 am
TYS
-
PIA
5h 09m
1 stop
$289United Airlines
Thu, Jul 23 - Sun, Jul 26

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Delta flights from Illinois to Knoxville

Our best Delta deals on Illinois to Knoxville flight tickets
Delta
Oct 27
STL6:00 amLambert-St Louis
4h 01m
1 stop
TYS11:01 amKnoxville McGhee Tyson
Nov 3
TYS5:45 amKnoxville McGhee Tyson
4h 04m
1 stop
STL8:49 amLambert-St Louis
$211
Delta
Aug 8
STL1:04 pmLambert-St Louis
6h 06m
1 stop
TYS8:10 pmKnoxville McGhee Tyson
Aug 10
TYS7:41 pmKnoxville McGhee Tyson
5h 17m
1 stop
STL11:58 pmLambert-St Louis
$214
Delta
Oct 26
STL7:10 amLambert-St Louis
5h 30m
1 stop
TYS1:40 pmKnoxville McGhee Tyson
Nov 4
TYS2:38 pmKnoxville McGhee Tyson
4h 37m
1 stop
STL6:15 pmLambert-St Louis
$224

Southwest flights from Illinois to Knoxville

Our best Southwest deals on Illinois to Knoxville flight tickets
Southwest
Sep 12
STL6:50 amLambert-St Louis
5h 25m
1 stop
TYS1:15 pmKnoxville McGhee Tyson
Sep 19
TYS6:50 amKnoxville McGhee Tyson
9h 40m
2 stops
STL3:30 pmLambert-St Louis
$216
Southwest
Sep 12
STL8:25 amLambert-St Louis
8h 15m
2 stops
TYS5:40 pmKnoxville McGhee Tyson
Sep 19
TYS6:50 amKnoxville McGhee Tyson
9h 40m
2 stops
STL3:30 pmLambert-St Louis
$221
Southwest
Aug 8
STL6:50 amLambert-St Louis
5h 25m
1 stop
TYS1:15 pmKnoxville McGhee Tyson
Aug 10
TYS1:00 pmKnoxville McGhee Tyson
7h 10m
2 stops
STL7:10 pmLambert-St Louis
$229

momondo 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, momondo users made 832,500 searches. Data last updated July 2, 2026.
Use the filters below to find and compare flights from Illinois to Knoxville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

ChicagoKnoxville

MDW - TYS

MDWTYS

Chicago Midway

Fri 10/9

12:36 pm-3:01 pm

Nonstop1h 25m

Knoxville McGhee Tyson

Mon 10/12

12:04 pm-12:36 pm

Nonstop1h 32m

$144

ChicagoKnoxville

MDW - TYS

MDWTYS

Chicago Midway

Thu 7/23

2:48 pm-5:18 pm

Nonstop1h 30m

Knoxville McGhee Tyson

Sun 8/2

1:22 pm-1:58 pm

Nonstop1h 36m

$145

St. LouisKnoxville

STL - TYS

STLTYS

Lambert-St Louis

Tue 10/27

6:00 am-11:01 am

1 stop4h 01m

Knoxville McGhee Tyson

Tue 11/3

5:45 am-8:49 am

1 stop4h 04m

$211

St. LouisKnoxville

STL - TYS

STLTYS

Lambert-St Louis

Sat 8/8

1:04 pm-8:10 pm

1 stop6h 06m

Knoxville McGhee Tyson

Mon 8/10

7:41 pm-11:58 pm

1 stop5h 17m

$214

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Sat 8/1

8:52 pm-8:21 pm

1 stop22h 29m

Knoxville McGhee Tyson

Mon 8/10

6:29 pm-11:10 pm

1 stop29h 41m

$214

St. LouisKnoxville

STL - TYS

STLTYS

Lambert-St Louis

Sat 9/12

6:50 am-1:15 pm

1 stop5h 25m

Knoxville McGhee Tyson

Sat 9/19

6:50 am-3:30 pm

2 stops9h 40m

$216

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Tue 8/11

8:05 am-12:06 pm

1 stop27h 01m

Knoxville McGhee Tyson

Sat 8/15

5:03 pm-12:15 pm

1 stop20h 12m

$219

St. LouisKnoxville

STL - TYS

STLTYS

Lambert-St Louis

Sat 9/12

8:25 am-5:40 pm

2 stops8h 15m

Knoxville McGhee Tyson

Sat 9/19

6:50 am-3:30 pm

2 stops9h 40m

$221

ChicagoKnoxville

ORD - TYS

ORDTYS

Chicago O'Hare Intl

Wed 8/5

6:55 am-9:43 am

Nonstop1h 48m

Knoxville McGhee Tyson

Sun 8/9

6:00 am-6:59 am

Nonstop1h 59m

$249

PeoriaKnoxville

PIA - TYS

PIATYS

Greater Peoria

Thu 7/23

1:13 pm-8:44 pm

1 stop6h 31m

Knoxville McGhee Tyson

Sun 7/26

6:00 am-10:09 am

1 stop5h 09m

$289

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Knoxville from

How to get the cheapest flight ticket from Illinois to Knoxville

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Knoxville?

The month of August is, on average, the cheapest month to fly to Knoxville from Illinois, with most prices found around $51. If you aren’t able to travel during the month of August, then book flights to Knoxville from Illinois during July instead. Flights to Knoxville in July, while not as cheap as those in August, still average around $53.

What is the cheapest day to depart on your flight to Knoxville?

The cheapest day to depart from Illinois to Knoxville is on a Saturday. Travelers who choose to depart for Knoxville on a Saturday will often find tickets for as low as $270. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to Knoxville for around $345.

What is the cheapest time of day to depart on your flight to Knoxville?

At noon is the cheapest time of day to fly from Illinois to Knoxville when you can find flight prices for as low as $235. Flying to Knoxville at noon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Knoxville is in the afternoon when prices are around $336.

What is the cheapest Illinois to Knoxville McGhee Tyson flight route?

Fly from Belleville to Knoxville McGhee Tyson for the best Illinois - Knoxville McGhee Tyson flight prices

How far in advance should I book a flight from Illinois to Knoxville?

You are more likely to see cheaper flights to Knoxville from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Knoxville for around $328 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Knoxville from Illinois for as low as $206 on momondo.

What cabin class options are available on Illinois to Knoxville flights?

There are 4 cabin classes available to choose from on Illinois to Knoxville flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to Knoxville flights?

No. A direct flight is the cheapest option for a flight between Illinois to Knoxville.

Cheap Illinois to Knoxville flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Knoxville

Best Price Found

$115

Fastest flight time

1h 25m

Direct flights

Every day

Airports in Knoxville

1 airport
The best one-way flight to Knoxville from Illinois in the past 72 hours is $115. The best round-trip flight deal from Illinois to Knoxville found on momondo in the last 72 hours is $128.
The fastest flight from Illinois to Knoxville takes 1h 25m
Direct flights go from Illinois to Knoxville every day.
There is 1 airport in Knoxville. From Illinois there are direct flights to Knoxville McGhee Tyson (TYS).
Search flight deals

Frequently asked questions about flying from Illinois to Knoxville

  • When did momondo last update prices for flights from Illinois to Knoxville McGhee Tyson Airport?

    Prices for flights from Illinois to Knoxville McGhee Tyson Airport are updated daily.

  • How many operators does momondo search for flights from Illinois to Knoxville McGhee Tyson Airport?

  • How old do you have to be to fly from Illinois to Knoxville McGhee Tyson Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Knoxville McGhee Tyson Airport.

  • What documentation or ID do you need to fly to Knoxville McGhee Tyson Airport?

    The required travel and health documents for your Knoxville McGhee Tyson Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Knoxville McGhee Tyson Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Illinois to Knoxville?

Best airlines flying from Illinois to Knoxville

Compare and see reviews for airlines that fly from Illinois to Knoxville with momondo
Airline
Rating
Free Cancellation
Price
Allegiant AirPriceFrom $75Free CancellationRating
7.3
689 reviews
Search Allegiant Air flights
American AirlinesPriceFrom $188Free CancellationRating
7.1
11,771 reviews
Search American Airlines flights
United AirlinesPriceFrom $189Free CancellationRating
7.4
9,924 reviews
Search United Airlines flights

Traveling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Pigeon Forge
Gatlinburg
Cherokee
Bryson City
Morristown
Corbin
Alcoa
Maryville
Murphy
Crossville
Oak Ridge
Kodak
Newport
Lenoir City
Dandridge
Clinton
Jefferson City
Rockford

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Knoxville?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Knoxville for you.

Can I find flights from Illinois to Knoxville with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Knoxville from Illinois with this policy.

How can momondo help me find flights from Illinois to Knoxville?

Once you have performed a search for Illinois to Knoxville flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Illinois to Knoxville right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Illinois to Knoxville now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Knoxville and let you know when they change.

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