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$193+ Cheap flights from Knoxville to Ontario (TYS - ONT)

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 6/15. Fares are subject to change and may not be available on all flights or dates of travel.
TYS — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Knoxville McGhee Tyson to Ontario are usually found in January or February, booked 15 days in advance, depart on a Tuesday or Wednesday and return on a Saturday

Cheap flight deals from Knoxville to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Knoxville (TYS) to Ontario (ONT). 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 June 12, 2025.

Round-trip from

$289
(Delta)

One-way from

$193
(FlightHub)

Popular in

December

Cheapest in

January

Average price

$409
From Knoxville McGhee Tyson to Ontario
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One-way flight from Knoxville McGhee Tyson to Ontario
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Highest demand for flights based on searches. 3% potential increase in price ($16 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 Knoxville to Ontario

Cheapest flights from Knoxville to Ontario
Explore the most affordable flight options available from Knoxville to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 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.
Wed 7/95:57 pmTYS - ONT
1 stop7h 30mDelta
Mon 7/1410:05 pmONT - TYS
1 stop8h 45mDelta
Deal found 6/10$289
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/95:05 amTYS - ONT
2 stops9h 55mAmerican Airlines
Tue 7/1512:55 pmONT - TYS
2 stops7h 57mAmerican Airlines
Deal found 6/9$299
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/248:33 pmTYS - ONT
1 stop15h 12mFrontier
Sat 8/3012:59 amONT - TYS
1 stop15h 42mFrontier
Deal found 6/10$301
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.
Tue 10/79:35 amTYS - ONT
2 stops13h 49mUnited Airlines
Sun 10/126:37 pmONT - TYS
2 stops12h 52mUnited Airlines
Deal found 6/11$414
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.
Wed 10/17:28 amTYS - ONT
2 stops14h 00mAlaska Airlines
Tue 10/77:25 pmONT - TYS
2 stops14h 53mAlaska Airlines
Deal found 6/10$484

Cheapflights Fare Finder

Customize your flight search to find flights from Knoxville to Ontario 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 June 12, 2025.
Use the filters below to find and compare flights from Knoxville to Ontario that are best for you.

Fly from

Knoxville

Fly to

Ontario

Route

Depart

Return

Price

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Wed 7/9

5:57 pm-10:27 pm

1 stop7h 30m

Ontario

Mon 7/14

10:05 pm-9:50 am

1 stop8h 45m

$289

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Wed 7/9

5:05 am-12:00 pm

2 stops9h 55m

Ontario

Tue 7/15

12:55 pm-11:52 pm

2 stops7h 57m

$299

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Sun 8/24

8:33 pm-8:45 am

1 stop15h 12m

Ontario

Sat 8/30

12:59 am-7:41 pm

1 stop15h 42m

$301

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Fri 6/27

5:46 pm-10:11 pm

1 stop7h 25m

Ontario

Sat 7/5

6:00 am-3:18 pm

1 stop6h 18m

$432

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Tue 7/8

8:08 am-6:04 pm

2 stops12h 56m

Ontario

Tue 7/15

6:10 pm-11:41 am

2 stops14h 31m

$558

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Sat 6/21

2:16 pm-11:59 pm

2 stops12h 43m

Ontario

Sat 6/28

12:59 am-4:29 pm

1 stop12h 30m

$1,032

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Sun 6/15

5:25 pm-9:01 am

1 stop18h 36m

$193

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Wed 7/9

5:46 pm-10:06 pm

1 stop7h 20m

$220

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Sat 7/5

6:00 am-10:01 am

1 stop7h 01m

$280

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Sun 6/15

7:46 am-4:28 pm

2 stops11h 42m

$375

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 Knoxville to Ontario

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

How far ahead should I book a flight from Knoxville to Ontario?

Use this chart to determine the optimal time to book a round-trip flight from Knoxville to Ontario. Price data was last updated on June 9, 2025.

The best time to book flights from Knoxville to Ontario is 15 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Knoxville to Ontario?

Currently, August is the cheapest month in which you can book a flight from Knoxville to Ontario (average of $246). Flying from Knoxville to Ontario in March is currently the most expensive (average of $328). 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 TYS to ONT?

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

Unlike in the morning, when flights are generally more expensive, you can save up to 28% on flights from Knoxville to Ontario by exploring options for tickets in the evening.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August 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 December, when temperatures are typically at their lowest (around 53.6 F).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated June 12, 2025.
To help decide which airline to fly from Knoxville to Ontario, see what other customers have to say about Alaska Airlines, Delta and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Frontier
5.9
Fair
3,295 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

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 Knoxville to Ontario. 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 Knoxville to Ontario round-trip?

    Currently priced at $289, Delta will fly you from Knoxville to Ontario and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Frontier - these airlines can fly you to your destination from $299 and $301, respectively. These flights start at 26% lower than the current average price 3 months from now.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $193. Users have also found prices from $220 and $280 on United Airlines and American Airlines, respectively.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Knoxville to Ontario (average of $246). Flying from Knoxville to Ontario in March is currently the most expensive (average of $328). 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 Ontario

Discover the top 2 airlines that operate flights from Knoxville to Ontario. 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$288Average$313FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$288Average$380FlexibilityNo cancel feeOn-time71%

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