$173+ Cheap flights from Ontario to Knoxville (ONT - TYS)
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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — TYS
Oct 28 — Nov 41
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Knoxville with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Knoxville
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to KnoxvilleExplore the most affordable flight options available from Ontario to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2026.
Explore the most affordable flight options available from Ontario to Knoxville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/25. 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.
Sat 10/3111:52 am -
1 stop23h 19m
Thu 11/56:30 am -
1 stop20h 21m
Deal found 9/25![Multiple Airlines logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 9/24. 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.
Wed 11/1111:52 am -
1 stop22h 27m
Sun 11/158:43 pm -
1 stop17h 33m
Deal found 9/24![Multiple Airlines logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Thu 11/126:25 am -
2 stops27h 14m
Mon 11/1610:09 pm -
1 stop14h 31m
Deal found 9/27![Multiple Airlines logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 9/23. 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.
Wed 10/2811:52 am -
1 stop22h 19m
Mon 11/29:42 pm -
1 stop14h 58m
Deal found 9/23![Multiple Airlines logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 9/25. 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.
Thu 11/58:35 pm -
1 stop23h 00m
Mon 11/910:09 pm -
1 stop21h 12m
Deal found 9/25![Multiple Airlines logo]()
$361
This Kiwi.com deal was found by Cheapflights users on 9/25. 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.
Wed 11/411:52 am -
1 stop22h 27m
Mon 11/910:09 pm -
1 stop14h 31m
Deal found 9/25![Multiple Airlines logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Thu 11/128:35 pm -
1 stop23h 00m
Thu 11/198:00 am -
2 stops15h 23m
Deal found 9/27![Multiple Airlines logo]()
$367
Best flights from Ontario to KnoxvilleDiscover carefully curated flight deals from Ontario to Knoxville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 28, 2026.
Discover carefully curated flight deals from Ontario to Knoxville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 28, 2026.
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Wed 11/181:29 pm -
1 stop6h 03m
Mon 11/233:45 pm -
1 stop8h 55m
Deal found 9/23![United Airlines logo]()
$377
This Southwest deal was found by Cheapflights users on 9/23. 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.
Wed 11/187:50 am -
2 stops9h 00m
Mon 11/233:40 pm -
2 stops10h 20m
Deal found 9/23![Southwest logo]()
$408
This Delta deal was found by Cheapflights users on 9/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2211:15 pm -
1 stop8h 39m
Tue 10/275:40 am -
1 stop8h 26m
Deal found 9/25![Delta logo]()
$609
This Southwest deal was found by Cheapflights users on 9/24. 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.
Mon 10/1911:00 am -
2 stops8h 45m
Tue 10/273:20 pm -
2 stops9h 45m
Deal found 9/24![Southwest logo]()
$463
This United Airlines deal was found by Cheapflights users on 9/27. 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.
Sat 1/306:00 am -
1 stop9h 23m
Wed 2/35:20 pm -
1 stop7h 20m
Deal found 9/27![United Airlines logo]()
$497
This United Airlines deal was found by Cheapflights users on 9/27. 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.
Wed 11/115:00 am -
2 stops8h 59m
Mon 11/165:05 pm -
1 stop6h 46m
Deal found 9/27![United Airlines logo]()
$543
Last-minute flights from Ontario to KnoxvilleDiscover last-minute flight deals from Ontario to Knoxville. Data last updated September 28, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Knoxville. Data last updated September 28, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/25. 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.
Sat 10/175:25 pm -
2 stops17h 53m
Mon 10/199:59 pm -
1 stop15h 32m
Deal found 9/25![Multiple Airlines logo]()
$420
This Southwest deal was found by Cheapflights users on 9/25. 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.
Sat 10/176:20 am -
2 stops8h 35m
Tue 10/204:20 pm -
1 stop8h 25m
Deal found 9/25![Southwest logo]()
$423
This American Airlines deal was found by Cheapflights users on 9/24. 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.
Mon 10/1911:10 pm -
1 stop7h 28m
Tue 10/276:00 am -
1 stop6h 35m
Deal found 9/24![American Airlines logo]()
$377
This United Airlines deal was found by Cheapflights users on 9/24. 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.
Mon 10/196:32 pm -
2 stops12h 13m
Tue 10/275:05 pm -
1 stop6h 46m
Deal found 9/24![United Airlines logo]()
$403
This Southwest deal was found by Cheapflights users on 9/25. 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 10/208:25 am -
2 stops9h 40m
Tue 10/274:20 pm -
1 stop8h 25m
Deal found 9/25![Southwest logo]()
$382
This Kiwi.com deal was found by Cheapflights users on 9/23. 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.
Wed 10/2811:52 am -
1 stop22h 19m
Mon 11/29:42 pm -
1 stop14h 58m
Deal found 9/23![Multiple Airlines logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 9/25. 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.
Sat 10/3111:52 am -
1 stop23h 19m
Thu 11/56:30 am -
1 stop20h 21m
Deal found 9/25![Multiple Airlines logo]()
$207
One-way flights from Ontario to KnoxvilleSearch for one-way flight options from Ontario to Knoxville. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.
Search for one-way flight options from Ontario to Knoxville. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/27. 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.
Sat 12/126:00 am -
3 stops35h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Multiple Airlines logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 9/23. 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.
Thu 11/58:35 pm -
2 stops18h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Multiple Airlines logo]()
$176
This Delta deal was found by Cheapflights users on 9/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2612:18 pm -
1 stop6h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Delta logo]()
$189
This Southwest deal was found by Cheapflights users on 9/27. 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.
Sat 12/125:35 am -
2 stops9h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Southwest logo]()
$194
This American Airlines deal was found by Cheapflights users on 9/27. 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.
Thu 11/261:30 pm -
2 stops16h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![American Airlines logo]()
$214
This Southwest deal was found by Cheapflights users on 9/23. 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 12/176:30 am -
1 stop9h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Southwest logo]()
$215
This Kiwi.com deal was found by Cheapflights users on 9/26. 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.
Sat 11/2111:40 am -
1 stop22h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![Multiple Airlines logo]()
$233
This Southwest deal was found by Cheapflights users on 9/26. 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.
Sat 11/218:05 pm -
2 stops13h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/26![Southwest logo]()
$241
This Delta deal was found by Cheapflights users on 9/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/167:00 am -
1 stop9h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Delta logo]()
$242
This United Airlines deal was found by Cheapflights users on 9/23. 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 10/201:22 pm -
1 stop5h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![United Airlines logo]()
$249
Find flight deals from Ontario to Knoxville
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Knoxville (TYS). 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 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $207 (Kiwi.com) |
One-way from | $176 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $421 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario 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, Cheapflights users made 7,457,451 searches. Data last updated September 28, 2026.
Use the filters below to find and compare flights from Ontario to Knoxville that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
OntarioKnoxville
ONT Ontario - TYS Knoxville McGhee Tyson
ONTTYS
Ontario
Mon 10/26
1:32 pm-10:32 pm
1 stop6h 00m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$249
OntarioKnoxville
ONT Ontario - TYS Knoxville McGhee Tyson
ONTTYS
Ontario
Sat 10/24
5:00 am-9:01 pm
2 stops13h 01m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$254
OntarioKnoxville
ONT Ontario - TYS Knoxville McGhee Tyson
ONTTYS
Ontario
Tue 10/20
5:00 am-3:49 pm
1 stop7h 49m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$290
OntarioKnoxville
ONT Ontario - TYS Knoxville McGhee Tyson
ONTTYS
Ontario
Mon 10/19
5:00 am-3:49 pm
1 stop7h 49m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$325
OntarioKnoxville
ONT Ontario - TYS Knoxville McGhee Tyson
ONTTYS
Ontario
Wed 10/7
7:00 am-5:08 pm
1 stop7h 08m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$346
OntarioKnoxville
ONT Ontario - TYS Knoxville McGhee Tyson
ONTTYS
Ontario
Mon 10/5
12:19 pm-11:55 pm
1 stop8h 36m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$351
OntarioKnoxville
ONT Ontario - TYS Knoxville McGhee Tyson
ONTTYS
Ontario
Tue 10/13
5:00 am-8:49 pm
2 stops12h 49m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$351
OntarioKnoxville
ONT Ontario - TYS Knoxville McGhee Tyson
ONTTYS
Ontario
Wed 11/18
1:29 pm-10:32 pm
1 stop6h 03m
Knoxville McGhee Tyson
Mon 11/23
3:45 pm-9:40 pm
1 stop8h 55m
$377
OntarioKnoxville
ONT Ontario - TYS Knoxville McGhee Tyson
ONTTYS
Ontario
Thu 10/22
5:00 am-3:49 pm
1 stop7h 49m
Knoxville McGhee Tyson
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$379
OntarioKnoxville
ONT Ontario - TYS Knoxville McGhee Tyson
ONTTYS
Ontario
Wed 11/18
7:50 am-7:50 pm
2 stops9h 00m
Knoxville McGhee Tyson
Mon 11/23
3:40 pm-11:00 pm
2 stops10h 20m
$408
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Ontario to Knoxville
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Knoxville in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Knoxville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Knoxville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Knoxville flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Knoxville flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Knoxville flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Knoxville
Have a flexible travel schedule? Discover the best time to fly to Knoxville from Ontario with our price prediction graph.
ONT-TYS
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 Ontario to Knoxville
How far ahead should I book a flight from Ontario to Knoxville?
To ensure you get the cheapest price possible for a flight from Ontario to Knoxville, you should look to book at least 61 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Ontario to Knoxville?
Currently, September is the cheapest month in which you can book a flight from Ontario to Knoxville (average of $421). Flying from Ontario to Knoxville in March is currently the most expensive (average of $564). 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.
How much does it cost to fly round-trip from Ontario to Knoxville?
Airfare is below average for this route at the moment.
Ontario to Knoxville flights typically cost between $426 and $838 in October.The cheapest round-trip price found within the last 5 days was $207 on Multiple Airlines (Oct 31-Nov 5).
Reviews of airlines servicing Knoxville
Get insights into the airlines that provide service to Knoxville. 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 Knoxville. Reviews last updated September 28, 2026.
Read reviews from past customers who have flown Delta,United Airlines, andAmerican Airlines from Ontario to Knoxville. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.8
Food
7.2
Overall
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentMichael,Sep 2023
SMF - ATL
Comfort
7.8
Food
7.2
Overall
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentMichael,Sep 2023
SMF - ATL
Comfort
7.8
Food
7.2
Overall
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentMichael,Sep 2023
SMF - ATL
Comfort
7.8
Food
7.2
Overall
7.8
Boarding
8.1
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentMichael,Sep 2023
SMF - ATL
Related info for your journey
Find useful and relevant information for your journey from Ontario to Knoxville. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Knoxville?
Book flights to Knoxville if you plan to visit one of these locationsCherokee
Crossville
Morristown
Bryson City
Murphy
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Other flights to Knoxville
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Ontario and Knoxville flights
Browse other Ontario and Knoxville flight options. Last updated on September 28, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on September 28, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from Ontario to Knoxville
Discover the top 3 airlines that operate flights from Ontario to Knoxville. 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 7,457,451 searches. Data last updated September 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$276 | Average$463 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$318 | Average$499 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$364 | Average$506 | FlexibilityNo cancel fee | On-time71% |