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Cheap flights from Ontario to Knoxville from $112

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 8/19. 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
6:00 am - 7:37 pm
ONT
-
TYS
10h 37m
1 stop
Frontier Logo
8:32 pm - 10:05 am
TYS
-
ONT
16h 33m
1 stop
$290Frontier
Mon, Jun 22 - Wed, Jul 1
Frontier Logo
6:00 am - 7:36 pm
ONT
-
TYS
10h 36m
1 stop
Frontier Logo
8:32 pm - 10:03 am
TYS
-
ONT
16h 31m
1 stop
$302Frontier
Mon, Jul 6 - Fri, Jul 10
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
$308Frontier
Mon, Jun 8 - Wed, Jun 17
Frontier Logo
6:00 am - 7:37 pm
ONT
-
TYS
10h 37m
1 stop
Frontier Logo
8:32 pm - 10:05 am
TYS
-
ONT
16h 33m
1 stop
$310Frontier
Wed, Jun 10 - Wed, Jun 17
Frontier Logo
6:00 am - 7:37 pm
ONT
-
TYS
10h 37m
1 stop
Frontier Logo
8:32 pm - 10:05 am
TYS
-
ONT
16h 33m
1 stop
$319Frontier
Mon, Jun 22 - Fri, Jun 26
Frontier Logo
6:00 am - 7:36 pm
ONT
-
TYS
10h 36m
1 stop
Frontier Logo
8:32 pm - 10:03 am
TYS
-
ONT
16h 31m
1 stop
$320Frontier
Mon, Jul 27 - Fri, Jul 31
Frontier Logo
6:00 am - 7:37 pm
ONT
-
TYS
10h 37m
1 stop
Frontier Logo
8:32 pm - 10:05 am
TYS
-
ONT
16h 33m
1 stop
$321Frontier
Fri, Jun 12 - Fri, Jun 19
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
$323Frontier
Mon, Jun 1 - Wed, Jun 10
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
$333Frontier
Mon, Jun 8 - Wed, Jun 17
Frontier Logo
6:00 am - 7:36 pm
ONT
-
TYS
10h 36m
1 stop
Frontier Logo
8:32 pm - 10:03 am
TYS
-
ONT
16h 31m
1 stop
$340Frontier
Mon, Jul 27 - Fri, Jul 31

Frontier flights from Ontario to Knoxville

Our best Frontier deals on Ontario to Knoxville flight tickets
Frontier
Jun 22
ONT6:00 amOntario
10h 37m
1 stop
TYS7:37 pmKnoxville McGhee Tyson
Jul 1
TYS8:32 pmKnoxville McGhee Tyson
16h 33m
1 stop
ONT10:05 amOntario
$290
Frontier
Jul 6
ONT6:00 amOntario
10h 36m
1 stop
TYS7:36 pmKnoxville McGhee Tyson
Jul 10
TYS8:32 pmKnoxville McGhee Tyson
16h 31m
1 stop
ONT10:03 amOntario
$302
Frontier
Jun 8
ONT6:00 amOntario
10h 33m
1 stop
TYS7:33 pmKnoxville McGhee Tyson
Jun 17
TYS8:32 pmKnoxville McGhee Tyson
16h 33m
1 stop
ONT10:05 amOntario
$308

American Airlines flights from Ontario to Knoxville

Our best American Airlines deals on Ontario to Knoxville flight tickets
American Airlines
Sep 9
ONT7:20 amOntario
6h 25m
1 stop
TYS4:45 pmKnoxville McGhee Tyson
Sep 16
TYS5:37 pmKnoxville McGhee Tyson
6h 31m
1 stop
ONT9:08 pmOntario
$359
American Airlines
Aug 25
ONT11:59 pmOntario
10h 32m
2 stops
TYS1:31 pmKnoxville McGhee Tyson
Sep 1
TYS6:50 pmKnoxville McGhee Tyson
7h 08m
1 stop
ONT10:58 pmOntario
$364
American Airlines
Jul 16
ONT2:15 pmOntario
6h 37m
1 stop
TYS11:52 pmKnoxville McGhee Tyson
Aug 6
TYS5:33 pmKnoxville McGhee Tyson
8h 25m
1 stop
ONT10:58 pmOntario
$433

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 May 18, 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

Mon 6/22

6:00 am-7:37 pm

1 stop10h 37m

Knoxville McGhee Tyson

Wed 7/1

8:32 pm-10:05 am

1 stop16h 33m

$290

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 7/6

6:00 am-7:36 pm

1 stop10h 36m

Knoxville McGhee Tyson

Fri 7/10

8:32 pm-10:03 am

1 stop16h 31m

$302
Quickest round-trip

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 6/8

6:00 am-7:33 pm

1 stop10h 33m

Knoxville McGhee Tyson

Wed 6/17

8:32 pm-10:05 am

1 stop16h 33m

$308

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 6/10

6:00 am-7:37 pm

1 stop10h 37m

Knoxville McGhee Tyson

Wed 6/17

8:32 pm-10:05 am

1 stop16h 33m

$310

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 6/22

6:00 am-7:37 pm

1 stop10h 37m

Knoxville McGhee Tyson

Fri 6/26

8:32 pm-10:05 am

1 stop16h 33m

$319

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 7/27

6:00 am-7:36 pm

1 stop10h 36m

Knoxville McGhee Tyson

Fri 7/31

8:32 pm-10:03 am

1 stop16h 31m

$320

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Fri 6/12

6:00 am-7:37 pm

1 stop10h 37m

Knoxville McGhee Tyson

Fri 6/19

8:32 pm-10:05 am

1 stop16h 33m

$321

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 6/1

6:00 am-7:33 pm

1 stop10h 33m

Knoxville McGhee Tyson

Wed 6/10

8:32 pm-10:05 am

1 stop16h 33m

$323

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 6/8

6:00 am-7:33 pm

1 stop10h 33m

Knoxville McGhee Tyson

Wed 6/17

8:32 pm-10:05 am

1 stop16h 33m

$333

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 7/27

6:00 am-7:36 pm

1 stop10h 36m

Knoxville McGhee Tyson

Fri 7/31

8:32 pm-10:03 am

1 stop16h 31m

$340

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 September is, on average, the cheapest month to fly to Knoxville from Ontario, with most prices found around $367. If you aren’t able to travel during the month of September, then book flights to Knoxville from Ontario during August instead. Flights to Knoxville in August, while not as cheap as those in September, still average around $373.

How far in advance should I book a flight from Ontario 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 $465 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 $246 on momondo.

How have Ontario to Knoxville flight prices changed over time?

As of May 2026, prices for Ontario to Knoxville flights are approximately 10% 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 10m

Direct flights

None
The fastest flight from Ontario to Knoxville takes 6h 10m
There are no direct flights from Ontario to Knoxville. There are no popular flight routes from Ontario to Knoxville.
Search flight deals

Frequently asked questions about flying from Ontario to Knoxville

  • 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 10m 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
11,648 reviews
Search American Airlines flights
DeltaPriceFrom $288Free CancellationRating
7.9
8,447 reviews
Search Delta flights
United AirlinesPriceFrom $318Free CancellationRating
7.4
9,737 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
Alcoa
Crossville
Maryville
Murphy
Oak Ridge
Newport
Lenoir City
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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