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Cheap flights from Knoxville to Illinois from $41

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 6/25. 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
0 bags

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Find the cheapest flights from Knoxville to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:20 pm - 11:13 pm
TYS
-
ORD
9h 53m
1 stop
Multiple Airlines Logo
8:05 am - 12:13 pm
ORD
-
TYS
27h 08m
1 stop
$203Multiple Airlines
Wed, May 20 - Wed, May 27
Multiple Airlines Logo
4:25 pm - 9:17 pm
TYS
-
ORD
29h 52m
1 stop
Multiple Airlines Logo
1:27 pm - 8:35 pm
ORD
-
TYS
30h 08m
1 stop
$205Multiple Airlines
Wed, Apr 29 - Sat, May 2
Allegiant Air Logo
6:20 pm - 10:08 am
TYS
-
PIA
16h 48m
1 stop
Allegiant Air Logo
6:19 pm - 12:53 pm
PIA
-
TYS
17h 34m
1 stop
$221Allegiant Air
Fri, May 1 - Sun, May 3
Allegiant Air Logo
5:21 pm - 8:24 am
TYS
-
MDW
16h 03m
1 stop
Allegiant Air Logo
2:49 pm - 5:19 pm
MDW
-
TYS
1h 30mnonstop
$238Allegiant Air
Sat, Aug 8 - Thu, Aug 13
Southwest Logo
2:55 pm - 9:15 pm
TYS
-
STL
7h 20m
1 stop
Southwest Logo
10:15 am - 5:10 pm
STL
-
TYS
5h 55m
1 stop
$249Southwest
Wed, May 13 - Wed, May 20
Southwest Logo
12:50 pm - 7:15 pm
TYS
-
STL
7h 25m
2 stops
Southwest Logo
8:25 am - 2:20 pm
STL
-
TYS
4h 55m
1 stop
$254Southwest
Tue, May 12 - Tue, May 19
American Airlines Logo
8:48 pm - 11:54 pm
TYS
-
MLI
4h 06m
1 stop
American Airlines Logo
4:24 pm - 9:58 pm
MLI
-
TYS
4h 34m
1 stop
$310American Airlines
Tue, May 19 - Tue, May 26
American Airlines Logo
6:07 pm - 11:59 pm
TYS
-
PIA
6h 52m
2 stops
American Airlines Logo
4:27 pm - 9:58 pm
PIA
-
TYS
4h 31m
1 stop
$314American Airlines
Sat, May 23 - Sat, May 30
United Airlines Logo
10:49 am - 2:03 pm
TYS
-
PIA
4h 14m
1 stop
United Airlines Logo
10:45 am - 4:59 pm
PIA
-
TYS
5h 14m
1 stop
$319United Airlines
Thu, Apr 30 - Sun, May 3
United Airlines Logo
6:30 am - 9:59 am
TYS
-
MLI
4h 29m
1 stop
United Airlines Logo
3:52 pm - 8:56 pm
MLI
-
TYS
4h 04m
1 stop
$329United Airlines
Tue, May 26 - Tue, Jun 2

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United Airlines flights from Knoxville to Illinois

Our best United Airlines deals on Knoxville to Illinois flight tickets
United Airlines
May 1
TYS7:00 amKnoxville McGhee Tyson
1h 56m
ORD7:56 amChicago O'Hare Intl
May 19
ORD6:00 pmChicago O'Hare Intl
1h 45m
TYS8:45 pmKnoxville McGhee Tyson
$264
United Airlines
Apr 30
TYS10:49 amKnoxville McGhee Tyson
4h 14m
1 stop
PIA2:03 pmGreater Peoria
May 3
PIA10:45 amGreater Peoria
5h 14m
1 stop
TYS4:59 pmKnoxville McGhee Tyson
$319
United Airlines
May 26
TYS6:30 amKnoxville McGhee Tyson
4h 29m
1 stop
MLI9:59 amMoline Quad-City
Jun 2
MLI3:52 pmMoline Quad-City
4h 04m
1 stop
TYS8:56 pmKnoxville McGhee Tyson
$329

American Airlines flights from Knoxville to Illinois

Our best American Airlines deals on Knoxville to Illinois flight tickets
American Airlines
May 9
TYS5:10 pmKnoxville McGhee Tyson
2h 14m
ORD6:24 pmChicago O'Hare Intl
May 10
ORD1:51 pmChicago O'Hare Intl
1h 48m
TYS4:39 pmKnoxville McGhee Tyson
$249
American Airlines
May 9
TYS5:57 pmKnoxville McGhee Tyson
6h 57m
1 stop
ORD11:54 pmChicago O'Hare Intl
May 10
ORD7:03 pmChicago O'Hare Intl
1h 53m
TYS9:56 pmKnoxville McGhee Tyson
$259
American Airlines
May 1
TYS5:00 amKnoxville McGhee Tyson
6h 11m
1 stop
ORD10:11 amChicago O'Hare Intl
May 9
ORD5:24 pmChicago O'Hare Intl
1h 54m
TYS8:18 pmKnoxville McGhee Tyson
$274

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 April 18, 2026.
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

Cheapest round-trip

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

Wed 5/20

2:20 pm-11:13 pm

1 stop9h 53m

Chicago O'Hare Intl

Wed 5/27

8:05 am-12:13 pm

1 stop27h 08m

$203

KnoxvilleChicago

TYS - ORD

TYSORD

Knoxville McGhee Tyson

Wed 4/29

4:25 pm-9:17 pm

1 stop29h 52m

Chicago O'Hare Intl

Sat 5/2

1:27 pm-8:35 pm

1 stop30h 08m

$205

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Fri 5/1

6:20 pm-10:08 am

1 stop16h 48m

Greater Peoria

Sun 5/3

6:19 pm-12:53 pm

1 stop17h 34m

$221

KnoxvilleChicago

TYS - MDW

TYSMDW

Knoxville McGhee Tyson

Sat 8/8

5:21 pm-8:24 am

1 stop16h 03m

Chicago Midway

Thu 8/13

2:49 pm-5:19 pm

Nonstop1h 30m

$238

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Wed 5/13

2:55 pm-9:15 pm

1 stop7h 20m

Lambert-St Louis

Wed 5/20

10:15 am-5:10 pm

1 stop5h 55m

$249

KnoxvilleSt. Louis

TYS - STL

TYSSTL

Knoxville McGhee Tyson

Tue 5/12

12:50 pm-7:15 pm

2 stops7h 25m

Lambert-St Louis

Tue 5/19

8:25 am-2:20 pm

1 stop4h 55m

$254

KnoxvilleMoline

TYS - MLI

TYSMLI

Knoxville McGhee Tyson

Tue 5/19

8:48 pm-11:54 pm

1 stop4h 06m

Moline Quad-City

Tue 5/26

4:24 pm-9:58 pm

1 stop4h 34m

$310

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Sat 5/23

6:07 pm-11:59 pm

2 stops6h 52m

Greater Peoria

Sat 5/30

4:27 pm-9:58 pm

1 stop4h 31m

$314

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Thu 4/30

10:49 am-2:03 pm

1 stop4h 14m

Greater Peoria

Sun 5/3

10:45 am-4:59 pm

1 stop5h 14m

$319
Quickest round-trip

KnoxvilleMoline

TYS - MLI

TYSMLI

Knoxville McGhee Tyson

Tue 5/26

6:30 am-9:59 am

1 stop4h 29m

Moline Quad-City

Tue 6/2

3:52 pm-8:56 pm

1 stop4h 04m

$329

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 January. Flight prices, which tend to average around $189, 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 January, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $219.

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 $375. Flights from Knoxville to Illinois on a Sunday will generally be more expensive and average around $700. 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 $481. Flights in the evening are often more expensive with an average ticket price of $578.

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 $289 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 $193 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

$201

Fastest flight time

1h 34m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Knoxville in the past 72 hours is $201. The best round-trip flight deal from Knoxville to Illinois found on momondo in the last 72 hours is $91.
The fastest flight from Knoxville to Illinois takes 1h 34m
Direct flights go from Knoxville to Illinois every day.
There are 98 airports in Illinois. From Knoxville there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW).
Search flight deals

Frequently asked questions about flying from Knoxville to Illinois

  • 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
7.3
707 reviews
Search Allegiant Air flights
United AirlinesPriceFrom $189Free CancellationRating
7.4
9,605 reviews
Search United Airlines flights
American AirlinesPriceFrom $189Free CancellationRating
7.1
11,604 reviews
Search American Airlines 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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