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Peoria

$229+ Cheap flights from Knoxville to Peoria, IL (TYS - PIA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — PIA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Knoxville to Peoria

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Peoria (PIA). 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 September 11, 2025.

Round-trip from

$229
(United Airlines)

Popular in

March

Cheapest in

January

Average price

$258
From Knoxville McGhee Tyson to Greater Peoria
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($138 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Knoxville to Peoria

Cheapest flights from Knoxville to Peoria
Explore the most affordable flight options available from Knoxville to Peoria. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/10. 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.
Tue 10/1410:51 amTYS - PIA
1 stop5h 28mUnited Airlines
Tue 10/213:56 pmPIA - TYS
1 stop5h 54mUnited Airlines
Deal found 9/10$229
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 9/185:35 pmTYS - PIA
1 stop4h 17mUnited Airlines
Sun 9/215:19 pmPIA - TYS
1 stop4h 26mUnited Airlines
Deal found 9/10$329
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 12/56:18 pmTYS - PIA
1 stop5h 42mAmerican Airlines
Sun 12/76:00 amPIA - TYS
2 stops7h 29mAmerican Airlines
Deal found 9/10$336
This American Airlines deal was found by Cheapflights users on 9/10. 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.
Tue 10/147:43 pmTYS - PIA
1 stop4h 18mAmerican Airlines
Tue 10/219:57 amPIA - TYS
2 stops8h 04mAmerican Airlines
Deal found 9/10$358
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/33:40 pmTYS - PIA
1 stop19h 50mAllegiant Air
Sun 10/55:23 pmPIA - TYS
1 stop16h 01mAllegiant Air
Deal found 9/11$384
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/36:20 amTYS - PIA
2 stops16h 12mMultiple Airlines
Sun 10/55:23 pmPIA - TYS
1 stop16h 01mMultiple Airlines
Deal found 9/11$426
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Sun 9/147:00 amTYS - PIA
1 stop4h 13mUnited Airlines
Tue 9/163:55 pmPIA - TYS
1 stop5h 50mUnited Airlines
Deal found 9/10$1,547

Cheapflights Fare Finder

 
Customize your flight search to find flights from Knoxville to Peoria 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 September 11, 2025.
Use the filters below to find and compare flights from Knoxville to Peoria that are best for you.

Fly from

Knoxville

Fly to

Peoria

Route

Depart

Return

Price

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Fri 12/5

7:00 am-10:09 am

1 stop4h 09m

Greater Peoria

Sun 12/7

10:45 am-5:11 pm

1 stop5h 26m

$229

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Tue 10/14

10:51 am-3:19 pm

1 stop5h 28m

Greater Peoria

Tue 10/21

3:56 pm-10:50 pm

1 stop5h 54m

$229

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Thu 9/18

5:35 pm-8:52 pm

1 stop4h 17m

Greater Peoria

Sun 9/21

5:19 pm-10:45 pm

1 stop4h 26m

$329

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Fri 12/5

6:18 pm-11:00 pm

1 stop5h 42m

Greater Peoria

Sun 12/7

6:00 am-2:29 pm

2 stops7h 29m

$336

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Tue 10/14

7:43 pm-11:01 pm

1 stop4h 18m

Greater Peoria

Tue 10/21

9:57 am-7:01 pm

2 stops8h 04m

$358

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Fri 10/3

3:40 pm-10:30 am

1 stop19h 50m

Greater Peoria

Sun 10/5

5:23 pm-10:24 am

1 stop16h 01m

$384

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Fri 10/3

6:20 am-9:32 pm

2 stops16h 12m

Greater Peoria

Sun 10/5

5:23 pm-10:24 am

1 stop16h 01m

$426

KnoxvillePeoria

TYS - PIA

TYSPIA

Knoxville McGhee Tyson

Sun 9/14

7:00 am-10:13 am

1 stop4h 13m

Greater Peoria

Tue 9/16

3:55 pm-10:45 pm

1 stop5h 50m

$1,547

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Best time to book a flight from Knoxville to Peoria

Have a flexible travel schedule? Discover the best time to fly to Peoria 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.

Cheapflights Insights

Everything you need to know about your flight from Knoxville to Peoria

What is the cheapest month to book a flight from Knoxville to Peoria, Illinois?

Currently, August is the cheapest month in which you can book a flight from Knoxville to Peoria, Illinois (average of $318). Flying from Knoxville to Peoria, Illinois in October is currently the most expensive (average of $424). 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.

Reviews of airlines servicing Peoria

Get insights into the airlines that provide service to Peoria. 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 Peoria. Reviews last updated September 11, 2025.
Read through reviews of airlines operating flights from Knoxville to Peoria, such as United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

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

  • How long is the flight from Knoxville to Peoria, Illinois?

    For as low as $229, United Airlines can have you in Peoria, Illinois from Knoxville in 4h 09m. Airlines will cover a distance of 456 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Knoxville to Peoria, Illinois round-trip?

    Cheapflights users have booked flights from Knoxville to Peoria, Illinois round-trip from $228. Another airline that can offer you cheap pricing is United Airlines. American Airlines is 43% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Knoxville to Peoria that include hotel bookings?

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

  • How can I find direct flights from Knoxville to Peoria?

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

  • Can I find deals for business class flights from Knoxville to Peoria?

    Yes. Cheapflights offers flight deals from Knoxville to Peoria 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 Peoria, Illinois?

    Currently, August is the cheapest month in which you can book a flight from Knoxville to Peoria, Illinois (average of $318). Flying from Knoxville to Peoria, Illinois in October is currently the most expensive (average of $424). 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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Top 2 airlines flying from Knoxville to Peoria

Discover the top 2 airlines that operate flights from Knoxville to Peoria. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$228Average$288FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$287Average$359FlexibilityNo cancel feeOn-time69%

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