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$175+ 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 7/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — TYS
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Ontario to Knoxville McGhee Tyson are usually found in November or January, booked 47 days in advance, depart on a Saturday or Tuesday and return on a Tuesday

Cheap 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 junio 12, 2025.

Round-trip from

$289
(Delta)

One-way from

$175
(Delta)

Popular in

June

Cheapest in

November

Average price

$484
From Ontario to Knoxville McGhee Tyson
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One-way flight from Ontario to Knoxville McGhee Tyson
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Highest demand for flights based on searches. 14% potential increase in price ($66 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find 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 junio 12, 2025.

This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/1611:45 amONT - TYS
1 stop9h 03mDelta
sáb. 8/235:45 amTYS - ONT
1 stop7h 50mDelta
Deal found 6/10$289
This Booking.com deal was found by Cheapflights users on 6/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/2012:59 amONT - TYS
1 stop15h 42mFrontier
lun. 8/257:10 pmTYS - ONT
1 stop7h 40mFrontier
Deal found 6/11$296
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/166:17 amONT - TYS
2 stops10h 28mAmerican Airlines
sáb. 8/2312:20 pmTYS - ONT
2 stops8h 32mAmerican Airlines
Deal found 6/11$299
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 6/286:28 pmONT - TYS
2 stops12h 59mUnited Airlines
sáb. 10/254:40 pmTYS - ONT
1 stop6h 44mUnited Airlines
Deal found 6/11$319
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/157:10 amONT - TYS
2 stops13h 37mAlaska Airlines
sáb. 10/181:01 pmTYS - ONT
2 stops13h 58mAlaska Airlines
Deal found 6/10$484
This Expedia deal was found by Cheapflights users on 6/9. 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.
sáb. 6/1412:59 amONT - TYS
1 stop12h 30mMultiple Airlines
jue. 6/192:16 pmTYS - ONT
2 stops12h 43mMultiple Airlines
Deal found 6/9$636

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 junio 12, 2025.
Use the filters below to find and compare flights from Ontario to Knoxville that are best for you.

Fly from

Ontario

Fly to

Knoxville

Route

Depart

Return

Price

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

sáb. 8/16

11:45 am-11:48 pm

1 stop9h 03m

Knoxville McGhee Tyson

sáb. 8/23

5:45 am-10:35 am

1 stop7h 50m

$289

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

mié. 8/20

12:59 am-7:41 pm

1 stop15h 42m

Knoxville McGhee Tyson

lun. 8/25

7:10 pm-11:50 pm

1 stop7h 40m

$296

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

sáb. 8/16

6:17 am-7:45 pm

2 stops10h 28m

Knoxville McGhee Tyson

sáb. 8/23

12:20 pm-5:52 pm

2 stops8h 32m

$299

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

sáb. 6/28

6:28 pm-10:27 am

2 stops12h 59m

Knoxville McGhee Tyson

sáb. 10/25

4:40 pm-8:24 pm

1 stop6h 44m

$319

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

mié. 10/15

7:10 am-11:47 pm

2 stops13h 37m

Knoxville McGhee Tyson

sáb. 10/18

1:01 pm-11:59 pm

2 stops13h 58m

$484

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

mar. 7/29

7:05 am-5:24 pm

1 stop7h 19m

$175

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

mié. 10/1

12:59 am-7:41 pm

1 stop15h 42m

$193

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

sáb. 6/28

6:28 pm-10:27 am

2 stops12h 59m

$205

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

jue. 6/26

6:00 am-1:38 pm

1 stop28h 38m

$208

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

mié. 6/25

6:58 pm-11:47 am

2 stops13h 49m

$393

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 11 results
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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 June 9, 2025.

To ensure you get the cheapest price possible for a flight from Ontario to Knoxville, you should look to book at least 47 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, January is the cheapest month in which you can book a flight from Ontario to Knoxville (average of $296). Flying from Ontario to Knoxville in March is currently the most expensive (average of $376). 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.

What is the cheapest time of day to fly from ONT to TYS?

Find hourly flight availability from Ontario to Knoxville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 12, 2025.

It’s typically best to fly out from Ontario to Knoxville in the afternoon. Doing so could potentially save you 14% on the flight price compared to flying in the evening, which is usually more expensive.

Rainfall in Knoxville by month

Plan your trip to Knoxville by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Knoxville ranges from 2.7 - 4.8 inches per month. March is typically the wettest month, when rainfall can reach 4.8 in. October is typically the driest time to visit Knoxville when rainfall is around 2.7 in.

Temperature in Knoxville by month

Plan your trip to Knoxville by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Knoxville, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 junio 12, 2025.
Read through reviews of airlines operating flights from Ontario to Knoxville, such as Alaska Airlines, Delta and United Airlines. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Frontier
6.0
Okay
3,295 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What are the cheapest airlines flying from Ontario to Knoxville round-trip?

    Currently priced at $289, Delta will fly you from Ontario to Knoxville and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Frontier and American Airlines - these airlines can fly you to your destination from $296 and $299, respectively. These flights start at 25% 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 Delta ($175), Frontier ($193), and United Airlines ($205).

  • 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, January is the cheapest month in which you can book a flight from Ontario to Knoxville (average of $296). Flying from Ontario to Knoxville in March is currently the most expensive (average of $376). 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 Ontario?

Book flights to Ontario if you plan to visit one of these locations
Morristown
Cherokee
Corbin
Maryville
Oak Ridge
Alcoa
Murphy

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Top 4 airlines flying from Ontario to Knoxville

Discover the top 4 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$254FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$257Average$410FlexibilityNo cancel feeOn-time71%
DeltaCheapest$288Average$378FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$288Average$445FlexibilityNo cancel feeOn-time69%

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