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Knoxville

$86+ Cheap flights from Ontario to Knoxville (ONT - TYS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — TYS
May 2 — May 91
Sat 5/2
Sat 5/9
1 adult, Economy
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Cheap flight deals from Ontario to Knoxville

Cheapest flights from Ontario to Knoxville
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 April 2, 2026.

This Expedia deal was found by Cheapflights users on 3/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2512:59 am
ONT
-
TYS
1 stop11h 34m
Frontier
Thu 4/304:28 pm
TYS
-
ONT
1 stop18h 03m
Frontier
Deal found 3/28$185
This Expedia deal was found by Cheapflights users on 3/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/136:20 am
ONT
-
TYS
1 stop6h 08m
Frontier
Thu 4/164:28 pm
TYS
-
ONT
1 stop18h 03m
Frontier
Deal found 3/30$231
This Kiwi.com deal was found by Cheapflights users on 4/1. 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.
Tue 5/58:06 pm
ONT
-
TYS
2 stops46h 08m
Multiple Airlines
Fri 5/151:43 pm
TYS
-
ONT
1 stop28h 26m
Multiple Airlines
Deal found 4/1$272
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 5/18:20 pm
ONT
-
TYS
2 stops18h 43m
Multiple Airlines
Fri 5/151:43 pm
TYS
-
ONT
1 stop28h 26m
Multiple Airlines
Deal found 4/1$275
This CheapOair deal was found by Cheapflights users on 4/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2912:59 am
ONT
-
TYS
1 stop11h 34m
Frontier
Sun 5/34:28 pm
TYS
-
ONT
1 stop18h 03m
Frontier
Deal found 4/1$281
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 4/2212:59 am
ONT
-
TYS
1 stop11h 34m
Multiple Airlines
Fri 5/151:43 pm
TYS
-
ONT
1 stop28h 26m
Multiple Airlines
Deal found 4/1$285
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 5/112:59 am
ONT
-
TYS
2 stops42h 34m
Multiple Airlines
Fri 5/151:43 pm
TYS
-
ONT
1 stop28h 26m
Multiple Airlines
Deal found 4/1$288
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/2212:59 am
ONT
-
TYS
1 stop11h 34m
Multiple Airlines
Mon 4/271:43 pm
TYS
-
ONT
1 stop24h 01m
Multiple Airlines
Deal found 3/30$291
This Kiwi.com deal was found by Cheapflights users on 4/1. 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.
Sun 4/268:21 am
ONT
-
TYS
2 stops35h 03m
Multiple Airlines
Fri 5/151:43 pm
TYS
-
ONT
1 stop28h 26m
Multiple Airlines
Deal found 4/1$297
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 4/2212:59 am
ONT
-
TYS
1 stop11h 34m
Multiple Airlines
Thu 5/79:40 pm
TYS
-
ONT
2 stops37h 40m
Multiple Airlines
Deal found 4/1$301
This Kiwi.com deal was found by Cheapflights users on 4/1. 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.
Mon 4/2712:59 am
ONT
-
TYS
2 stops35h 36m
Multiple Airlines
Fri 5/151:43 pm
TYS
-
ONT
1 stop28h 26m
Multiple Airlines
Deal found 4/1$303

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 April 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$185
(Expedia)

One-way from

$86
(Frontier)

Popular in

January

Cheapest in

August

Average price

$477
Provider with most accurate pricing for Ontario-Knoxville McGhee Tyson flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Knoxville McGhee Tyson flights.
Search Deals
From Ontario to Knoxville McGhee Tyson
Search Deals
One-way flight from Ontario to Knoxville McGhee Tyson
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

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 2,558,603 searches. Data last updated April 2, 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

Price

Cheapest round-trip

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 5/4

10:15 pm-9:22 am

1 stop8h 07m

Knoxville McGhee Tyson

Wed 5/13

3:30 pm-9:48 pm

1 stop9h 18m

$396

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 4/18

12:49 pm-11:54 pm

1 stop8h 05m

Knoxville McGhee Tyson

Thu 4/23

4:38 pm-9:00 pm

1 stop7h 22m

$446

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 4/25

5:10 am-3:06 pm

1 stop6h 56m

Knoxville McGhee Tyson

Sat 5/2

3:40 pm-9:58 pm

1 stop9h 18m

$466
Quickest round-trip

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 4/25

5:10 am-3:06 pm

1 stop6h 56m

Knoxville McGhee Tyson

Wed 4/29

4:30 pm-8:36 pm

1 stop7h 06m

$466

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 4/27

9:55 pm-12:00 pm

2 stops11h 05m

Knoxville McGhee Tyson

Thu 4/30

2:45 pm-10:40 pm

2 stops10h 55m

$480

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 5/23

5:00 am-8:56 pm

2 stops12h 56m

Knoxville McGhee Tyson

Sat 5/30

5:57 pm-10:46 pm

1 stop7h 49m

$543

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Thu 4/23

1:27 pm-10:34 pm

2 stops30h 07m

Knoxville McGhee Tyson

Mon 4/27

5:53 pm-12:20 pm

2 stops21h 27m

$663

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Thu 6/18

5:00 am-3:53 pm

1 stop7h 53m

Knoxville McGhee Tyson

Tue 6/23

5:57 pm-10:46 pm

1 stop7h 49m

$677

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sun 4/5

6:05 am-6:15 pm

1 stop9h 10m

Knoxville McGhee Tyson

Tue 4/7

11:25 am-8:36 pm

2 stops12h 11m

$690

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Fri 4/17

5:10 am-3:06 pm

1 stop6h 56m

Knoxville McGhee Tyson

Mon 4/20

4:30 pm-8:36 pm

1 stop7h 06m

$707

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/29

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Knoxville. Price data was last updated on April 2, 2026.

To ensure you get the cheapest price possible for a flight from Ontario to Knoxville, you should look to book at least 64 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 $186). Flying from Ontario to Knoxville in June is currently the most expensive (average of $288). 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?

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 April 2, 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.
Delta
7.9
Good
8,370 reviews

Food

7.2

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
Delta
7.9
Good
8,370 reviews
Delta
7.9
Good
8,370 reviews

Food

7.2

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
United Airlines
7.4
Good
9,533 reviews
Delta
7.9
Good
8,370 reviews

Food

7.2

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin
American Airlines
7.1
Good
11,549 reviews
Delta
7.9
Good
8,370 reviews

Food

7.2

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Michael,Sep 2023

SMF - ATL

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

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.

  • How long is the flight from Ontario to Knoxville?

    Departing from Ontario to Knoxville will take you 6h 56m. Airlines will cover a distance of 1897 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 Ontario to Knoxville round-trip?

    Currently priced at $288, American Airlines will fly you from Ontario to Knoxville and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $288 and $318, respectively. These flights start at 34% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Ontario to Knoxville one-way?

    The cheapest airlines for a one-way flight from Ontario to Knoxville are American Airlines ($131), United Airlines ($174), and Frontier ($180).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Knoxville 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 Ontario to Knoxville?

    Currently, September is the cheapest month in which you can book a flight from Ontario to Knoxville (average of $186). Flying from Ontario to Knoxville in June is currently the most expensive (average of $288). 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

Traveling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Cherokee
Crossville
Corbin
Morristown
Bryson City
Alcoa
Murphy
Oak Ridge

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Knoxville

See prices for flight routes from nearby airports that may be better suited for you.
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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 2,558,603 searches. Data last updated April 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$288Average$446FlexibilityNo cancel feeOn-time71%
DeltaCheapest$288Average$418FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$318Average$503FlexibilityNo cancel feeOn-time69%

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