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Cheap flights from Ontario to Knoxville from $162

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 12/29. 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 - 3:28 pm
ONT
-
TYS
6h 28m1 stop
Frontier Logo
8:18 pm - 11:59 pm
TYS
-
ONT
6h 41m1 stop
$182Frontier
jue., ene. 8 - jue., ene. 15
Frontier Logo
6:20 am - 3:30 pm
ONT
-
TYS
6h 10m1 stop
Frontier Logo
4:30 pm - 12:20 am
TYS
-
ONT
10h 50m1 stop
$217Frontier
vie., feb. 6 - lun., feb. 9
Frontier Logo
6:00 am - 4:40 pm
ONT
-
TYS
7h 40m1 stop
Frontier Logo
5:35 pm - 11:59 pm
TYS
-
ONT
9h 24m1 stop
$237Frontier
jue., feb. 19 - dom., feb. 22
Frontier Logo
6:45 am - 3:31 pm
ONT
-
TYS
5h 46m1 stop
Frontier Logo
4:46 pm - 11:59 pm
TYS
-
ONT
10h 13m1 stop
$278Frontier
jue., dic. 25 - lun., ene. 5
Frontier Logo
6:45 am - 3:31 pm
ONT
-
TYS
5h 46m1 stop
Frontier Logo
4:26 pm - 11:59 pm
TYS
-
ONT
10h 33m1 stop
$292Frontier
jue., dic. 25 - dom., ene. 4
Delta Logo
10:30 pm - 8:22 am
ONT
-
TYS
6h 52m1 stop
Delta Logo
5:30 am - 11:20 am
TYS
-
ONT
8h 50m1 stop
$319Delta
sáb., abr. 11 - sáb., abr. 18
Frontier Logo
6:45 am - 3:51 pm
ONT
-
TYS
6h 06m1 stop
Frontier Logo
4:26 pm - 11:59 pm
TYS
-
ONT
10h 33m1 stop
$324Frontier
lun., dic. 29 - jue., ene. 1
Multiple Airlines Logo
3:49 pm - 8:39 am
ONT
-
TYS
37h 50m2 stops
Multiple Airlines Logo
4:23 pm - 11:56 pm
TYS
-
ONT
10h 33m1 stop
$331Multiple Airlines
vie., ene. 9 - dom., ene. 11
Multiple Airlines Logo
7:57 am - 11:01 pm
ONT
-
TYS
12h 04m1 stop
Multiple Airlines Logo
8:30 am - 9:33 pm
TYS
-
ONT
16h 03m2 stops
$340Multiple Airlines
vie., feb. 20 - dom., feb. 22
American Airlines Logo
10:39 pm - 8:41 am
ONT
-
TYS
7h 02m1 stop
American Airlines Logo
4:15 pm - 9:29 pm
TYS
-
ONT
8h 14m1 stop
$368American Airlines
mié., feb. 18 - dom., feb. 22

Frontier flights from Ontario to Knoxville

Our best Frontier deals on Ontario to Knoxville flight tickets
Frontier
Jan 8
ONT6:00 amOntario
6h 28m
1 stop
TYS3:28 pmKnoxville McGhee Tyson
Jan 15
TYS8:18 pmKnoxville McGhee Tyson
6h 41m
1 stop
ONT11:59 pmOntario
$182
Find similar
Frontier
Feb 6
ONT6:20 amOntario
6h 10m
1 stop
TYS3:30 pmKnoxville McGhee Tyson
Feb 9
TYS4:30 pmKnoxville McGhee Tyson
10h 50m
1 stop
ONT12:20 amOntario
$217
Find similar
Frontier
Feb 19
ONT6:00 amOntario
7h 40m
1 stop
TYS4:40 pmKnoxville McGhee Tyson
Feb 22
TYS5:35 pmKnoxville McGhee Tyson
9h 24m
1 stop
ONT11:59 pmOntario
$237
Find similar

Southwest flights from Ontario to Knoxville

Our best Southwest deals on Ontario to Knoxville flight tickets
Southwest
Apr 22
ONT6:15 amOntario
10h 25m
2 stops
TYS7:40 pmKnoxville McGhee Tyson
Apr 27
TYS8:05 amKnoxville McGhee Tyson
10h 10m
1 stop
ONT3:15 pmOntario
$443
Find similar
Southwest
Apr 22
ONT6:15 amOntario
10h 25m
2 stops
TYS7:40 pmKnoxville McGhee Tyson
Apr 27
TYS6:35 amKnoxville McGhee Tyson
9h 35m
2 stops
ONT1:10 pmOntario
$448
Find similar
Southwest
Apr 16
ONT9:55 pmOntario
10h 45m
2 stops
TYS11:40 amKnoxville McGhee Tyson
Apr 20
TYS8:05 amKnoxville McGhee Tyson
10h 10m
1 stop
ONT3:15 pmOntario
$468
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 diciembre 11, 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

jue. 1/8

6:00 am-3:28 pm

1 stop6h 28m

Knoxville McGhee Tyson

jue. 1/15

8:18 pm-11:59 pm

1 stop6h 41m

$182

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

vie. 2/6

6:20 am-3:30 pm

1 stop6h 10m

Knoxville McGhee Tyson

lun. 2/9

4:30 pm-12:20 am

1 stop10h 50m

$217

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

jue. 2/19

6:00 am-4:40 pm

1 stop7h 40m

Knoxville McGhee Tyson

dom. 2/22

5:35 pm-11:59 pm

1 stop9h 24m

$237

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

jue. 12/25

6:45 am-3:31 pm

1 stop5h 46m

Knoxville McGhee Tyson

lun. 1/5

4:46 pm-11:59 pm

1 stop10h 13m

$278

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

jue. 12/25

6:45 am-3:31 pm

1 stop5h 46m

Knoxville McGhee Tyson

dom. 1/4

4:26 pm-11:59 pm

1 stop10h 33m

$292

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

sáb. 4/11

10:30 pm-8:22 am

1 stop6h 52m

Knoxville McGhee Tyson

sáb. 4/18

5:30 am-11:20 am

1 stop8h 50m

$319

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

lun. 12/29

6:45 am-3:51 pm

1 stop6h 06m

Knoxville McGhee Tyson

jue. 1/1

4:26 pm-11:59 pm

1 stop10h 33m

$324

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

vie. 1/9

3:49 pm-8:39 am

2 stops37h 50m

Knoxville McGhee Tyson

dom. 1/11

4:23 pm-11:56 pm

1 stop10h 33m

$331

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

vie. 2/20

7:57 am-11:01 pm

1 stop12h 04m

Knoxville McGhee Tyson

dom. 2/22

8:30 am-9:33 pm

2 stops16h 03m

$340

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

mié. 2/18

10:39 pm-8:41 am

1 stop7h 02m

Knoxville McGhee Tyson

dom. 2/22

4:15 pm-9:29 pm

1 stop8h 14m

$368

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.

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 $423 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 December 2025, prices for Ontario to Knoxville flights are approximately 70% 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 06m

Direct flights

None
The fastest flight from Ontario to Knoxville takes 6h 06m
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 06m 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
11,050 reviews
Search American Airlines flights
United AirlinesPriceFrom $288Free CancellationRating
7.4
9,095 reviews
Search United Airlines flights
DeltaPriceFrom $288Free CancellationRating
7.9
8,008 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
Maryville
Crossville
Murphy
Alcoa
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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