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Cheap flights from Ontario to Knoxville from $111

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 11/6. 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.
Multiple Airlines Logo
3:26 pm - 4:50 pmONT-TYS
22h 24m1 stop
Multiple Airlines Logo
3:32 pm - 11:59 pmTYS-ONT
11h 27m1 stop
$239Multiple Airlines
Find Deal
Thu, Jan 8 - Sun, Jan 11
Frontier Logo
12:05 pm - 6:22 pmONT-TYS
27h 17m1 stop
Frontier Logo
4:48 pm - 11:57 pmTYS-ONT
10h 09m1 stop
$262Frontier
Find Deal
Sat, Nov 15 - Fri, Nov 21
Multiple Airlines Logo
3:26 pm - 1:40 pmONT-TYS
19h 14m2 stops
Multiple Airlines Logo
3:32 pm - 11:59 pmTYS-ONT
11h 27m1 stop
$278Multiple Airlines
Find Deal
Thu, Jan 8 - Sun, Jan 11
Frontier Logo
6:53 am - 6:22 pmONT-TYS
8h 29m1 stop
Frontier Logo
8:05 pm - 11:57 pmTYS-ONT
6h 52m1 stop
$282Frontier
Find Deal
Sun, Nov 16 - Sat, Nov 22
Delta Logo
10:30 pm - 9:13 amONT-TYS
7h 43m1 stop
Delta Logo
5:30 am - 11:38 amTYS-ONT
9h 08m1 stop
$349Delta
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Sat, Feb 21 - Wed, Feb 25
Delta Logo
10:30 pm - 9:13 amONT-TYS
7h 43m1 stop
Delta Logo
5:30 am - 11:38 amTYS-ONT
9h 08m1 stop
$368Delta
Find Deal
Mon, Feb 16 - Wed, Mar 25
American Airlines Logo
7:10 am - 5:30 pmONT-TYS
7h 20m1 stop
American Airlines Logo
6:25 pm - 10:31 pmTYS-ONT
7h 06m1 stop
$388American Airlines
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Wed, Feb 18 - Sun, Feb 22
American Airlines Logo
11:59 pm - 11:28 amONT-TYS
8h 29m1 stop
American Airlines Logo
5:23 am - 9:38 amTYS-ONT
7h 15m1 stop
$389American Airlines
Find Deal
Sat, Dec 20 - Sat, Jan 3
United Airlines Logo
5:00 am - 9:10 pmONT-TYS
13h 10m2 stops
United Airlines Logo
10:55 am - 8:50 pmTYS-ONT
12h 55m2 stops
$419United Airlines
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Sat, Feb 21 - Wed, Feb 25
United Airlines Logo
7:00 am - 5:08 pmONT-TYS
7h 08m1 stop
United Airlines Logo
4:59 pm - 9:49 pmTYS-ONT
7h 50m1 stop
$456United Airlines
Find Deal
Thu, Nov 27 - Wed, Dec 3

Frontier flights from Ontario to Knoxville

Our best Frontier deals on Ontario to Knoxville flight tickets
Frontier
Nov 15
ONT12:05 pmOntario
27h 17m
1 stop
TYS6:22 pmKnoxville McGhee Tyson
Nov 21
TYS4:48 pmKnoxville McGhee Tyson
10h 09m
1 stop
ONT11:57 pmOntario
$262
Find similar
Frontier
Nov 8
ONT12:05 pmOntario
27h 17m
1 stop
TYS6:22 pmKnoxville McGhee Tyson
Nov 22
TYS8:05 pmKnoxville McGhee Tyson
18h 23m
1 stop
ONT11:28 amOntario
$265
Find similar
Frontier
Nov 16
ONT6:53 amOntario
8h 29m
1 stop
TYS6:22 pmKnoxville McGhee Tyson
Nov 22
TYS8:05 pmKnoxville McGhee Tyson
6h 52m
1 stop
ONT11:57 pmOntario
$282
Find similar

American Airlines flights from Ontario to Knoxville

Our best American Airlines deals on Ontario to Knoxville flight tickets
American Airlines
Feb 18
ONT7:10 amOntario
7h 20m
1 stop
TYS5:30 pmKnoxville McGhee Tyson
Feb 22
TYS6:25 pmKnoxville McGhee Tyson
7h 06m
1 stop
ONT10:31 pmOntario
$388
Find similar
American Airlines
Dec 20
ONT11:59 pmOntario
8h 29m
1 stop
TYS11:28 amKnoxville McGhee Tyson
Jan 3
TYS5:23 amKnoxville McGhee Tyson
7h 15m
1 stop
ONT9:38 amOntario
$389
Find similar
American Airlines
Feb 18
ONT7:50 pmOntario
9h 48m
2 stops
TYS8:38 amKnoxville McGhee Tyson
Feb 22
TYS6:25 pmKnoxville McGhee Tyson
8h 33m
1 stop
ONT11:58 pmOntario
$393
Find similar

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 October 31, 2025.
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

Thu 1/8

3:26 pm-4:50 pm

1 stop22h 24m

Knoxville McGhee Tyson

Sun 1/11

3:32 pm-11:59 pm

1 stop11h 27m

$239

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 11/15

12:05 pm-6:22 pm

1 stop27h 17m

Knoxville McGhee Tyson

Fri 11/21

4:48 pm-11:57 pm

1 stop10h 09m

$262

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Thu 1/8

3:26 pm-1:40 pm

2 stops19h 14m

Knoxville McGhee Tyson

Sun 1/11

3:32 pm-11:59 pm

1 stop11h 27m

$278

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sun 11/16

6:53 am-6:22 pm

1 stop8h 29m

Knoxville McGhee Tyson

Sat 11/22

8:05 pm-11:57 pm

1 stop6h 52m

$282

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 2/21

10:30 pm-9:13 am

1 stop7h 43m

Knoxville McGhee Tyson

Wed 2/25

5:30 am-11:38 am

1 stop9h 08m

$349

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 2/16

10:30 pm-9:13 am

1 stop7h 43m

Knoxville McGhee Tyson

Wed 3/25

5:30 am-11:38 am

1 stop9h 08m

$368

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 2/18

7:10 am-5:30 pm

1 stop7h 20m

Knoxville McGhee Tyson

Sun 2/22

6:25 pm-10:31 pm

1 stop7h 06m

$388

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 12/20

11:59 pm-11:28 am

1 stop8h 29m

Knoxville McGhee Tyson

Sat 1/3

5:23 am-9:38 am

1 stop7h 15m

$389

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 2/21

5:00 am-9:10 pm

2 stops13h 10m

Knoxville McGhee Tyson

Wed 2/25

10:55 am-8:50 pm

2 stops12h 55m

$419

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Thu 11/27

7:00 am-5:08 pm

1 stop7h 08m

Knoxville McGhee Tyson

Wed 12/3

4:59 pm-9:49 pm

1 stop7h 50m

$456

Flights are sorted by cheapest round-trip flights 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.

What is the cheapest day to depart on your flight to Knoxville?

The cheapest day to depart from Ontario to Knoxville is on a Saturday. Travelers who choose to depart for Knoxville on a Saturday will often find tickets for as low as $387. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Knoxville for around $552.

What is the cheapest time of day to depart on your flight to Knoxville?

In the afternoon is the cheapest time of day to fly from Ontario to Knoxville when you can find flight prices for as low as $399. Flying to Knoxville in the afternoon is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Knoxville is in the evening when prices are around $442.

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 $421 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 $307 on momondo.

How have Ontario to Knoxville flight prices changed over time?

As of October 2025, prices for Ontario to Knoxville flights are approximately 35% 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

Direct flights

None
There are no direct flights from Ontario to Knoxville. There are no popular flight routes from Ontario to Knoxville.
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  • 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 46m 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
American AirlinesPriceFrom $288Free CancellationRating
7.2
11,035 reviews
Search American Airlines flights
United AirlinesPriceFrom $288Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
DeltaPriceFrom $288Free CancellationRating
7.9
7,998 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
Murphy
Alcoa
Oak Ridge
Lenoir City
Newport
Kodak
Dandridge
Clinton
Jefferson City
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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