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Cheap flights from Ontario to Knoxville from $86

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 5/11. 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
1 adult, Economy, 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 - 7:31 am
TYS
-
ONT
18h 03m
1 stop
$241Frontier
Wed, Apr 15 - Thu, Apr 30
Frontier Logo
6:20 am - 3:28 pm
ONT
-
TYS
6h 08m
1 stop
Frontier Logo
4:28 pm - 11:55 pm
TYS
-
ONT
10h 27m
1 stop
$251Frontier
Fri, Apr 10 - Thu, Apr 16
Frontier Logo
6:00 am - 7:33 pm
ONT
-
TYS
10h 33m
1 stop
Frontier Logo
8:32 pm - 10:05 am
TYS
-
ONT
16h 33m
1 stop
$261Frontier
Mon, May 11 - Fri, May 15
Southwest Logo
9:30 am - 7:35 pm
ONT
-
TYS
7h 05m
1 stop
Southwest Logo
7:05 am - 12:15 pm
TYS
-
ONT
8h 10m
2 stops
$264Southwest
Sat, May 2 - Wed, May 6
Southwest Logo
8:40 am - 7:35 pm
ONT
-
TYS
7h 55m
2 stops
Southwest Logo
7:05 am - 12:15 pm
TYS
-
ONT
8h 10m
2 stops
$269Southwest
Sat, May 2 - Wed, May 6
Delta Logo
10:15 pm - 9:22 am
ONT
-
TYS
8h 07m
1 stop
Delta Logo
4:38 pm - 9:00 pm
TYS
-
ONT
7h 22m
1 stop
$279Delta
Sat, May 2 - Wed, May 6
Frontier Logo
12:59 am - 3:33 pm
ONT
-
TYS
11h 34m
1 stop
Frontier Logo
4:28 pm - 7:31 am
TYS
-
ONT
18h 03m
1 stop
$281Frontier
Wed, Apr 15 - Sun, Apr 19
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
$290Frontier
Wed, Apr 29 - Sun, May 3
American Airlines Logo
2:08 pm - 11:56 pm
ONT
-
TYS
6h 48m
1 stop
American Airlines Logo
6:54 pm - 10:36 pm
TYS
-
ONT
6h 42m
1 stop
$293American Airlines
Wed, Apr 22 - Wed, Apr 29
Frontier Logo
6:20 am - 3:28 pm
ONT
-
TYS
6h 08m
1 stop
Frontier Logo
4:20 pm - 11:56 pm
TYS
-
ONT
10h 36m
1 stop
$310Frontier
Mon, Apr 6 - Fri, Apr 10

American Airlines flights from Ontario to Knoxville

Our best American Airlines deals on Ontario to Knoxville flight tickets
American Airlines
Apr 22
ONT2:08 pmOntario
6h 48m
1 stop
TYS11:56 pmKnoxville McGhee Tyson
Apr 29
TYS6:54 pmKnoxville McGhee Tyson
6h 42m
1 stop
ONT10:36 pmOntario
$293
American Airlines
Apr 22
ONT2:08 pmOntario
6h 48m
1 stop
TYS11:56 pmKnoxville McGhee Tyson
Apr 29
TYS6:54 pmKnoxville McGhee Tyson
7h 52m
1 stop
ONT11:46 pmOntario
$311
American Airlines
Apr 15
ONT11:59 pmOntario
7h 27m
1 stop
TYS10:26 amKnoxville McGhee Tyson
Apr 18
TYS3:58 pmKnoxville McGhee Tyson
8h 09m
1 stop
ONT9:07 pmOntario
$337

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 30
TYS4:28 pmKnoxville McGhee Tyson
18h 03m
1 stop
ONT7:31 amOntario
$241
Frontier
Apr 10
ONT6:20 amOntario
6h 08m
1 stop
TYS3:28 pmKnoxville McGhee Tyson
Apr 16
TYS4:28 pmKnoxville McGhee Tyson
10h 27m
1 stop
ONT11:55 pmOntario
$251
Frontier
May 11
ONT6:00 amOntario
10h 33m
1 stop
TYS7:33 pmKnoxville McGhee Tyson
May 15
TYS8:32 pmKnoxville McGhee Tyson
16h 33m
1 stop
ONT10:05 amOntario
$261

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 March 26, 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

Wed 4/15

12:59 am-3:33 pm

1 stop11h 34m

Knoxville McGhee Tyson

Thu 4/30

4:28 pm-7:31 am

1 stop18h 03m

$241

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Fri 4/10

6:20 am-3:28 pm

1 stop6h 08m

Knoxville McGhee Tyson

Thu 4/16

4:28 pm-11:55 pm

1 stop10h 27m

$251

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 5/11

6:00 am-7:33 pm

1 stop10h 33m

Knoxville McGhee Tyson

Fri 5/15

8:32 pm-10:05 am

1 stop16h 33m

$261

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 5/2

9:30 am-7:35 pm

1 stop7h 05m

Knoxville McGhee Tyson

Wed 5/6

7:05 am-12:15 pm

2 stops8h 10m

$264

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 5/2

8:40 am-7:35 pm

2 stops7h 55m

Knoxville McGhee Tyson

Wed 5/6

7:05 am-12:15 pm

2 stops8h 10m

$269

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Sat 5/2

10:15 pm-9:22 am

1 stop8h 07m

Knoxville McGhee Tyson

Wed 5/6

4:38 pm-9:00 pm

1 stop7h 22m

$279

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-7:31 am

1 stop18h 03m

$281

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 4/29

12:59 am-3:33 pm

1 stop11h 34m

Knoxville McGhee Tyson

Sun 5/3

4:28 pm-11:55 pm

1 stop10h 27m

$290
Quickest round-trip

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 4/22

2:08 pm-11:56 pm

1 stop6h 48m

Knoxville McGhee Tyson

Wed 4/29

6:54 pm-10:36 pm

1 stop6h 42m

$293

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 4/6

6:20 am-3:28 pm

1 stop6h 08m

Knoxville McGhee Tyson

Fri 4/10

4:20 pm-11:56 pm

1 stop10h 36m

$310

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 typical price of a round-trip flight between Ontario and Knoxville?

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 $318. 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 $428 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 March 2026, prices for Ontario to Knoxville flights are approximately 36% 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

6h 01m

Direct flights

None
The fastest flight from Ontario to Knoxville takes 6h 01m
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 6h 01m 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
7.1
11,495 reviews
Search American Airlines flights
DeltaPriceFrom $288Free CancellationRating
7.9
8,331 reviews
Search Delta flights
United AirlinesPriceFrom $318Free CancellationRating
7.4
9,483 reviews
Search United Airlines 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
Maryville
Crossville
Alcoa
Murphy
Oak Ridge
Lenoir City
Newport
Kodak
Jefferson City
Dandridge
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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