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Cheap flights from Knoxville to Illinois from $49

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Illinois departing on 9/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Knoxville to Illinois

Cheap round-trip flights

Allegiant Air Logo
6:24 pm - 7:00 pmTYS-MDW
1h 36mnonstop
Allegiant Air Logo
3:16 pm - 5:47 pmMDW-TYS
1h 31mnonstop
$78Allegiant Air
Find Deal
vie., sep. 26 - lun., sep. 29
Allegiant Air Logo
6:24 pm - 7:00 pmTYS-MDW
1h 36mnonstop
Allegiant Air Logo
3:16 pm - 5:47 pmMDW-TYS
1h 31mnonstop
$80Allegiant Air
Find Deal
vie., sep. 19 - lun., sep. 29
Logo
6:24 pm - 7:00 pmTYS-MDW
1h 36mnonstop
Logo
9:48 am - 5:34 pmMDW-TYS
6h 46m1 stop
$165
Find Deal
vie., sep. 19 - vie., sep. 26
Logo
10:44 am - 11:16 amTYS-MDW
1h 32mnonstop
Logo
10:51 am - 8:40 amMDW-TYS
20h 49m1 stop
$168
Find Deal
vie., oct. 3 - sáb., oct. 4
United Airlines Logo
7:00 am - 7:55 amTYS-ORD
1h 55mnonstop
United Airlines Logo
7:55 pm - 10:45 pmORD-TYS
1h 50mnonstop
$189United Airlines
Find Deal
vie., sep. 12 - dom., sep. 14
United Airlines Logo
7:00 am - 7:55 amTYS-ORD
1h 55mnonstop
United Airlines Logo
8:00 pm - 10:50 pmORD-TYS
1h 50mnonstop
$194United Airlines
Find Deal
jue., oct. 9 - lun., oct. 13
American Airlines Logo
4:48 pm - 5:49 pmTYS-ORD
2h 01mnonstop
American Airlines Logo
9:28 am - 12:21 pmORD-TYS
1h 53mnonstop
$199American Airlines
Find Deal
jue., sep. 4 - dom., sep. 7
Delta Logo
6:08 pm - 9:36 pmTYS-MDW
4h 28m1 stop
Delta Logo
4:25 pm - 11:44 pmMDW-TYS
6h 19m1 stop
$209Delta
Find Deal
mar., sep. 30 - sáb., oct. 4
Delta Logo
7:11 pm - 11:54 pmTYS-ORD
5h 43m1 stop
Delta Logo
7:10 am - 11:41 amORD-TYS
3h 31m1 stop
$209Delta
Find Deal
vie., sep. 26 - lun., sep. 29
American Airlines Logo
4:37 pm - 10:50 pmTYS-STL
7h 13m1 stop
American Airlines Logo
7:16 am - 1:12 pmSTL-TYS
4h 56m1 stop
$219American Airlines
Find Deal
vie., sep. 5 - mar., sep. 9

Frontier flights from Knoxville to Illinois

Our best Frontier deals on Knoxville to Illinois flight tickets
Frontier
Sep 4
TYS8:40 pmKnoxville McGhee Tyson
13h 57m
1 stop
ORD9:37 amChicago O'Hare Intl
Sep 7
ORD6:00 amChicago O'Hare Intl
9h 18m
1 stop
TYS4:18 pmKnoxville McGhee Tyson
$179
Find similar
Frontier
Sep 4
TYS8:40 pmKnoxville McGhee Tyson
13h 57m
1 stop
ORD9:37 amChicago O'Hare Intl
Sep 8
ORD10:42 amChicago O'Hare Intl
8h 03m
1 stop
TYS7:45 pmKnoxville McGhee Tyson
$205
Find similar
Frontier
Sep 7
TYS5:08 pmKnoxville McGhee Tyson
7h 51m
1 stop
ORD11:59 pmChicago O'Hare Intl
Sep 8
ORD10:42 amChicago O'Hare Intl
8h 03m
1 stop
TYS7:45 pmKnoxville McGhee Tyson
$218
Find similar

United Airlines flights from Knoxville to Illinois

Our best United Airlines deals on Knoxville to Illinois flight tickets
United Airlines
Sep 12
TYS7:00 amKnoxville McGhee Tyson
1h 55m
ORD7:55 amChicago O'Hare Intl
Sep 14
ORD7:55 pmChicago O'Hare Intl
1h 50m
TYS10:45 pmKnoxville McGhee Tyson
$189
Find similar
United Airlines
Oct 9
TYS7:00 amKnoxville McGhee Tyson
1h 55m
ORD7:55 amChicago O'Hare Intl
Oct 13
ORD8:00 pmChicago O'Hare Intl
1h 50m
TYS10:50 pmKnoxville McGhee Tyson
$194
Find similar
United Airlines
Sep 4
TYS5:35 pmKnoxville McGhee Tyson
2h 02m
ORD6:37 pmChicago O'Hare Intl
Sep 7
ORD10:35 amChicago O'Hare Intl
1h 50m
TYS1:25 pmKnoxville McGhee Tyson
$199
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated agosto 21, 2025.
Use the filters below to find and compare flights from Knoxville to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

vie. 9/26

6:24 pm-7:00 pm

Nonstop1h 36m

Chicago Midway

lun. 9/29

3:16 pm-5:47 pm

Nonstop1h 31m

$78

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

vie. 9/19

6:24 pm-7:00 pm

Nonstop1h 36m

Chicago Midway

lun. 9/29

3:16 pm-5:47 pm

Nonstop1h 31m

$80

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

vie. 9/19

6:24 pm-7:00 pm

Nonstop1h 36m

Chicago Midway

vie. 9/26

9:48 am-5:34 pm

1 stop6h 46m

$165

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

vie. 10/3

10:44 am-11:16 am

Nonstop1h 32m

Chicago Midway

sáb. 10/4

10:51 am-8:40 am

1 stop20h 49m

$168

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

vie. 9/12

7:00 am-7:55 am

Nonstop1h 55m

Chicago O'Hare Intl

dom. 9/14

7:55 pm-10:45 pm

Nonstop1h 50m

$189

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

jue. 10/9

7:00 am-7:55 am

Nonstop1h 55m

Chicago O'Hare Intl

lun. 10/13

8:00 pm-10:50 pm

Nonstop1h 50m

$194

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

jue. 9/4

4:48 pm-5:49 pm

Nonstop2h 01m

Chicago O'Hare Intl

dom. 9/7

9:28 am-12:21 pm

Nonstop1h 53m

$199

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

mar. 9/30

6:08 pm-9:36 pm

1 stop4h 28m

Chicago Midway

sáb. 10/4

4:25 pm-11:44 pm

1 stop6h 19m

$209

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

vie. 9/26

7:11 pm-11:54 pm

1 stop5h 43m

Chicago O'Hare Intl

lun. 9/29

7:10 am-11:41 am

1 stop3h 31m

$209

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

vie. 9/5

4:37 pm-10:50 pm

1 stop7h 13m

Lambert-St Louis

mar. 9/9

7:16 am-1:12 pm

1 stop4h 56m

$219

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 Illinois from

How to get the cheapest flight ticket from Knoxville to Illinois

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 Illinois?

The cheapest month to fly to Illinois from Knoxville is in September. Flight prices, which tend to average around $196, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of September, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $206.

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

The cheapest day to depart from Knoxville to Illinois is on a Friday when prices can be found for as low as $395. Flights from Knoxville to Illinois on a Sunday will generally be more expensive and average around $742. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Knoxville to Illinois during this time can be as low as $485. Flights in the evening are often more expensive with an average ticket price of $806.

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

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

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

You are more likely to see cheaper flights to Illinois from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $274 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Knoxville for as low as $205 on momondo.

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

There are 4 cabin classes available to choose from on Knoxville McGhee Tyson to Illinois 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 Knoxville to Illinois flights?

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

Cheap Knoxville to Illinois flight deals and tips

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

Best Price Found

$64

Fastest flight time

1h 32m

Direct flights

Every day

Airports in Illinois

2 airports
The best one-way flight to Illinois from Knoxville in the past 72 hours is $64. The best round-trip flight deal from Knoxville to Illinois found on momondo in the last 72 hours is $66.
The fastest flight from Knoxville to Illinois takes 1h 32m
Direct flights go from Knoxville to Illinois every day.
There are 2 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW)
Search flight deals

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Knoxville to Illinois

Compare and see reviews for airlines that fly from Knoxville to Illinois with momondo
Airline
Rating
Free Cancellation
Price
Allegiant AirPriceFrom $60Free CancellationRating
7.2
702 reviews
Search Allegiant Air flights
American AirlinesPriceFrom $179Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $189Free CancellationRating
7.4
8,930 reviews
Search United Airlines flights
DeltaPriceFrom $233Free CancellationRating
7.9
7,981 reviews
Search Delta flights

Why use momondo?

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

Finding the right flight to Illinois from Knoxville is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for Knoxville to Illinois flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Knoxville.

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

Yes momondo offers price alerts on flights to Illinois from Knoxville. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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