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Cheap flights from Ontario to Knoxville from $104

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Knoxville departing on 2/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Knoxville

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:59 am - 3:33 pm
ONT
-
TYS
11h 34m
1 stop
Frontier Logo
4:28 pm - 11:55 pm
TYS
-
ONT
10h 27m
1 stop
$190Frontier
Wed, Apr 15 - Sun, Apr 19
Frontier Logo
6:15 am - 3:25 pm
ONT
-
TYS
6h 10m
1 stop
Frontier Logo
4:20 pm - 11:59 pm
TYS
-
ONT
10h 39m
1 stop
$228Frontier
Mon, Mar 9 - Mon, Mar 16
Frontier Logo
12:59 am - 3:33 pm
ONT
-
TYS
11h 34m
1 stop
Frontier Logo
4:28 pm - 11:55 pm
TYS
-
ONT
10h 27m
1 stop
$232Frontier
Wed, May 6 - Sun, May 10
Frontier Logo
6:10 am - 7:18 pm
ONT
-
TYS
10h 08m
1 stop
Frontier Logo
6:51 pm - 11:59 pm
TYS
-
ONT
8h 08m
1 stop
$276Frontier
Mon, Feb 23 - Fri, Feb 27
Multiple Airlines Logo
3:24 pm - 11:01 pm
ONT
-
TYS
28h 37m
1 stop
Multiple Airlines Logo
8:13 pm - 9:34 pm
TYS
-
ONT
28h 21m
1 stop
$282Multiple Airlines
Thu, Feb 19 - Mon, Feb 23
Multiple Airlines Logo
10:57 am - 5:34 pm
ONT
-
TYS
27h 37m
2 stops
Multiple Airlines Logo
1:36 pm - 1:28 pm
TYS
-
ONT
26h 52m
1 stop
$293Multiple Airlines
Mon, Mar 9 - Mon, Mar 16
Multiple Airlines Logo
3:24 pm - 11:01 pm
ONT
-
TYS
28h 37m
1 stop
Multiple Airlines Logo
2:06 pm - 1:52 pm
TYS
-
ONT
26h 46m
2 stops
$303Multiple Airlines
Thu, Feb 19 - Mon, Feb 23
Multiple Airlines Logo
2:23 pm - 12:45 pm
ONT
-
TYS
19h 22m
2 stops
Multiple Airlines Logo
1:33 pm - 12:09 pm
TYS
-
ONT
25h 36m
1 stop
$313Multiple Airlines
Tue, Mar 31 - Mon, Apr 6
Delta Logo
12:57 pm - 11:57 pm
ONT
-
TYS
8h 00m
1 stop
Delta Logo
4:38 pm - 9:00 pm
TYS
-
ONT
7h 22m
1 stop
$319Delta
Wed, Apr 1 - Wed, Apr 15
Multiple Airlines Logo
2:23 pm - 12:45 pm
ONT
-
TYS
19h 22m
2 stops
Multiple Airlines Logo
1:33 pm - 2:26 pm
TYS
-
ONT
27h 53m
1 stop
$321Multiple Airlines
Tue, Mar 31 - Mon, Apr 6

Frontier flights from Ontario to Knoxville

Our best Frontier deals on Ontario to Knoxville flight tickets
Frontier
Apr 15
ONT12:59 amOntario
11h 34m
1 stop
TYS3:33 pmKnoxville McGhee Tyson
Apr 19
TYS4:28 pmKnoxville McGhee Tyson
10h 27m
1 stop
ONT11:55 pmOntario
$190
Frontier
Mar 9
ONT6:15 amOntario
6h 10m
1 stop
TYS3:25 pmKnoxville McGhee Tyson
Mar 16
TYS4:20 pmKnoxville McGhee Tyson
10h 39m
1 stop
ONT11:59 pmOntario
$228
Frontier
May 6
ONT12:59 amOntario
11h 34m
1 stop
TYS3:33 pmKnoxville McGhee Tyson
May 10
TYS4:28 pmKnoxville McGhee Tyson
10h 27m
1 stop
ONT11:55 pmOntario
$232

Delta flights from Ontario to Knoxville

Our best Delta deals on Ontario to Knoxville flight tickets
Delta
Apr 1
ONT12:57 pmOntario
8h 00m
1 stop
TYS11:57 pmKnoxville McGhee Tyson
Apr 15
TYS4:38 pmKnoxville McGhee Tyson
7h 22m
1 stop
ONT9:00 pmOntario
$319
Delta
Apr 1
ONT12:57 pmOntario
8h 00m
1 stop
TYS11:57 pmKnoxville McGhee Tyson
Apr 8
TYS5:40 amKnoxville McGhee Tyson
9h 07m
1 stop
ONT11:47 amOntario
$359
Delta
Apr 2
ONT10:25 pmOntario
7h 51m
1 stop
TYS9:16 amKnoxville McGhee Tyson
Apr 7
TYS5:40 amKnoxville McGhee Tyson
9h 07m
1 stop
ONT11:47 amOntario
$368

momondo 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, momondo users made 832,500 searches. Data last updated February 9, 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

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 4/15

12:59 am-3:33 pm

1 stop11h 34m

Knoxville McGhee Tyson

Sun 4/19

4:28 pm-11:55 pm

1 stop10h 27m

$190

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 3/9

6:15 am-3:25 pm

1 stop6h 10m

Knoxville McGhee Tyson

Mon 3/16

4:20 pm-11:59 pm

1 stop10h 39m

$228

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 5/6

12:59 am-3:33 pm

1 stop11h 34m

Knoxville McGhee Tyson

Sun 5/10

4:28 pm-11:55 pm

1 stop10h 27m

$232

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 2/23

6:10 am-7:18 pm

1 stop10h 08m

Knoxville McGhee Tyson

Fri 2/27

6:51 pm-11:59 pm

1 stop8h 08m

$276

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Thu 2/19

3:24 pm-11:01 pm

1 stop28h 37m

Knoxville McGhee Tyson

Mon 2/23

8:13 pm-9:34 pm

1 stop28h 21m

$282

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 3/9

10:57 am-5:34 pm

2 stops27h 37m

Knoxville McGhee Tyson

Mon 3/16

1:36 pm-1:28 pm

1 stop26h 52m

$293

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Thu 2/19

3:24 pm-11:01 pm

1 stop28h 37m

Knoxville McGhee Tyson

Mon 2/23

2:06 pm-1:52 pm

2 stops26h 46m

$303

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Tue 3/31

2:23 pm-12:45 pm

2 stops19h 22m

Knoxville McGhee Tyson

Mon 4/6

1:33 pm-12:09 pm

1 stop25h 36m

$313

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 4/1

12:57 pm-11:57 pm

1 stop8h 00m

Knoxville McGhee Tyson

Wed 4/15

4:38 pm-9:00 pm

1 stop7h 22m

$319

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Tue 3/31

2:23 pm-12:45 pm

2 stops19h 22m

Knoxville McGhee Tyson

Mon 4/6

1:33 pm-2:26 pm

1 stop27h 53m

$321

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Knoxville from

How to get the cheapest flight ticket from Ontario to Knoxville

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Knoxville?

The month of April is, on average, the cheapest month to fly to Knoxville from Ontario, with most prices found around $343. If you aren’t able to travel during the month of April, then book flights to Knoxville from Ontario during August instead. Flights to Knoxville in August, while not as cheap as those in April, still average around $348.

How far in advance should I book a flight to Knoxville?

You are more likely to see cheaper flights to Knoxville from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Knoxville for around $431 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Knoxville from Ontario for as low as $294 on momondo.

How have Ontario to Knoxville flight prices changed over time?

As of February 2026, prices for Ontario to Knoxville flights are approximately 23% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to Knoxville

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Knoxville according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Knoxville (ONT to TYS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Knoxville

Fastest flight time

5h 47m

Direct flights

None
The fastest flight from Ontario to Knoxville takes 5h 47m
There are no direct flights from Ontario to Knoxville. There are no popular flight routes from Ontario to Knoxville.
Search flight deals

  • How far is Ontario to Knoxville McGhee Tyson by plane?

    A flight from Ontario to Knoxville McGhee Tyson will travel around 1902.5 mi. Typically, this will take 5h 47m by plane in normal conditions.

  • When did momondo last update prices for flights from Ontario Airport to Knoxville McGhee Tyson Airport?

    Prices for flights from Ontario Airport to Knoxville McGhee Tyson Airport refresh daily.

  • How many operators does momondo search for flights from Ontario Airport to Knoxville McGhee Tyson Airport?

  • How old do you have to be to fly from Ontario Airport to Knoxville McGhee Tyson Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to Knoxville McGhee Tyson Airport.

  • What documentation or ID do you need to fly to Knoxville McGhee Tyson Airport?

    The travel and health documents you'll need for your trip to Knoxville McGhee Tyson Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Knoxville McGhee Tyson Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ontario to Knoxville?

Best airlines flying from Ontario to Knoxville

Compare and see reviews for airlines that fly from Ontario to Knoxville with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $288Free CancellationRating
7.4
9,263 reviews
Search United Airlines flights
American AirlinesPriceFrom $288Free CancellationRating
7.2
11,258 reviews
Search American Airlines flights
DeltaPriceFrom $288Free CancellationRating
7.9
8,176 reviews
Search Delta flights

Traveling to a place near Knoxville?

Book flights to Knoxville if you plan to visit one of these locations
Pigeon Forge
Gatlinburg
Cherokee
Bryson City
Morristown
Corbin
Crossville
Maryville
Alcoa
Murphy
Oak Ridge
Lenoir City
Newport
Kodak
Dandridge
Jefferson City
Clinton
Rockford

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Knoxville?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Knoxville. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Knoxville with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Knoxville from Ontario with this policy.

How can momondo help me find flights from Ontario to Knoxville?

Once all potential Ontario to Knoxville flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Knoxville right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Knoxville, momondo offers a useful price alert feature which will track prices for flights to Knoxville from Ontario and alert you when they change.

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