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Cheap flights from Ontario to Knoxville from $136

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 8/10. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Knoxville

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:00 am - 7:24 pm
ONT
-
TYS
10h 24m
1 stop
Multiple Airlines Logo
8:00 am - 11:50 pm
TYS
-
ONT
42h 50m
2 stops
$267Multiple Airlines
Wed, Aug 12 - Mon, Aug 31
Multiple Airlines Logo
6:00 am - 7:24 pm
ONT
-
TYS
10h 24m
1 stop
Multiple Airlines Logo
8:30 am - 11:50 pm
TYS
-
ONT
42h 20m
2 stops
$278Multiple Airlines
Wed, Aug 12 - Fri, Aug 28
Frontier Logo
6:00 am - 7:24 pm
ONT
-
TYS
10h 24m
1 stop
Frontier Logo
8:19 pm - 10:04 am
TYS
-
ONT
16h 45m
1 stop
$279Frontier
Mon, Aug 3 - Wed, Aug 12
Multiple Airlines Logo
6:00 am - 7:24 pm
ONT
-
TYS
10h 24m
1 stop
Multiple Airlines Logo
8:00 am - 11:50 pm
TYS
-
ONT
42h 50m
2 stops
$288Multiple Airlines
Mon, Aug 17 - Mon, Aug 31
Frontier Logo
6:00 am - 7:24 pm
ONT
-
TYS
10h 24m
1 stop
Frontier Logo
8:19 pm - 11:50 pm
TYS
-
ONT
6h 31m
1 stop
$289Frontier
Wed, Aug 5 - Mon, Aug 17
Multiple Airlines Logo
6:00 am - 7:24 pm
ONT
-
TYS
10h 24m
1 stop
Multiple Airlines Logo
10:30 am - 7:01 pm
TYS
-
ONT
35h 31m
2 stops
$290Multiple Airlines
Wed, Aug 12 - Tue, Sep 1
Frontier Logo
6:00 am - 7:24 pm
ONT
-
TYS
10h 24m
1 stop
Frontier Logo
8:19 pm - 10:04 am
TYS
-
ONT
16h 45m
1 stop
$295Frontier
Wed, Jul 29 - Wed, Aug 5
Frontier Logo
6:00 am - 7:24 pm
ONT
-
TYS
10h 24m
1 stop
Frontier Logo
8:19 pm - 11:50 pm
TYS
-
ONT
6h 31m
1 stop
$298Frontier
Fri, Aug 7 - Mon, Aug 17
Multiple Airlines Logo
6:00 am - 7:24 pm
ONT
-
TYS
10h 24m
1 stop
Multiple Airlines Logo
8:00 am - 10:04 am
TYS
-
ONT
29h 04m
2 stops
$312Multiple Airlines
Fri, Aug 14 - Mon, Aug 31
Frontier Logo
6:00 am - 7:24 pm
ONT
-
TYS
10h 24m
1 stop
Frontier Logo
8:19 pm - 11:50 pm
TYS
-
ONT
6h 31m
1 stop
$315Frontier
Wed, Jul 15 - Wed, Jul 29

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American Airlines flights from Ontario to Knoxville

Our best American Airlines deals on Ontario to Knoxville flight tickets
American Airlines
Sep 9
ONT12:37 pmOntario
7h 45m
1 stop
TYS11:22 pmKnoxville McGhee Tyson
Sep 16
TYS7:30 amKnoxville McGhee Tyson
8h 55m
1 stop
ONT1:25 pmOntario
$345
American Airlines
Jul 8
ONT2:15 pmOntario
6h 36m
1 stop
TYS11:51 pmKnoxville McGhee Tyson
Aug 4
TYS5:37 amKnoxville McGhee Tyson
9h 08m
1 stop
ONT11:45 amOntario
$443
American Airlines
Jul 8
ONT7:15 pmOntario
10h 16m
2 stops
TYS8:31 amKnoxville McGhee Tyson
Aug 4
TYS5:37 amKnoxville McGhee Tyson
6h 52m
1 stop
ONT9:29 amOntario
$489

Southwest flights from Ontario to Knoxville

Our best Southwest deals on Ontario to Knoxville flight tickets
Southwest
Aug 15
ONT6:55 amOntario
6h 15m
1 stop
TYS4:10 pmKnoxville McGhee Tyson
Aug 22
TYS1:55 pmKnoxville McGhee Tyson
9h 55m
1 stop
ONT8:50 pmOntario
$350
Southwest
Oct 20
ONT6:40 amOntario
5h 45m
1 stop
TYS3:25 pmKnoxville McGhee Tyson
Oct 24
TYS7:00 amKnoxville McGhee Tyson
13h 05m
2 stops
ONT5:05 pmOntario
$356
Southwest
Aug 18
ONT8:35 amOntario
7h 20m
2 stops
TYS6:55 pmKnoxville McGhee Tyson
Aug 25
TYS7:00 amKnoxville McGhee Tyson
8h 30m
2 stops
ONT12:30 pmOntario
$378

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 July 3, 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 8/12

6:00 am-7:24 pm

1 stop10h 24m

Knoxville McGhee Tyson

Mon 8/31

8:00 am-11:50 pm

2 stops42h 50m

$267

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 8/12

6:00 am-7:24 pm

1 stop10h 24m

Knoxville McGhee Tyson

Fri 8/28

8:30 am-11:50 pm

2 stops42h 20m

$278

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 8/3

6:00 am-7:24 pm

1 stop10h 24m

Knoxville McGhee Tyson

Wed 8/12

8:19 pm-10:04 am

1 stop16h 45m

$279

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Mon 8/17

6:00 am-7:24 pm

1 stop10h 24m

Knoxville McGhee Tyson

Mon 8/31

8:00 am-11:50 pm

2 stops42h 50m

$288
Quickest round-trip

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 8/5

6:00 am-7:24 pm

1 stop10h 24m

Knoxville McGhee Tyson

Mon 8/17

8:19 pm-11:50 pm

1 stop6h 31m

$289

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 8/12

6:00 am-7:24 pm

1 stop10h 24m

Knoxville McGhee Tyson

Tue 9/1

10:30 am-7:01 pm

2 stops35h 31m

$290

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 7/29

6:00 am-7:24 pm

1 stop10h 24m

Knoxville McGhee Tyson

Wed 8/5

8:19 pm-10:04 am

1 stop16h 45m

$295

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Fri 8/7

6:00 am-7:24 pm

1 stop10h 24m

Knoxville McGhee Tyson

Mon 8/17

8:19 pm-11:50 pm

1 stop6h 31m

$298

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Fri 8/14

6:00 am-7:24 pm

1 stop10h 24m

Knoxville McGhee Tyson

Mon 8/31

8:00 am-10:04 am

2 stops29h 04m

$312

OntarioKnoxville

ONT - TYS

ONTTYS

Ontario

Wed 7/15

6:00 am-7:24 pm

1 stop10h 24m

Knoxville McGhee Tyson

Wed 7/29

8:19 pm-11:50 pm

1 stop6h 31m

$315

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 August is, on average, the cheapest month to fly to Knoxville from Ontario, with most prices found around $379. If you aren’t able to travel during the month of August, then book flights to Knoxville from Ontario during November instead. Flights to Knoxville in November, while not as cheap as those in August, still average around $415.

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 $481 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 $276 on momondo.

How have Ontario to Knoxville flight prices changed over time?

As of July 2026, prices for Ontario to Knoxville flights are approximately 17% 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 11m

Direct flights

None
The fastest flight from Ontario to Knoxville takes 6h 11m
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 11m 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
DeltaPriceFrom $288Free CancellationRating
7.8
8,453 reviews
Search Delta flights
American AirlinesPriceFrom $313Free CancellationRating
7.1
11,764 reviews
Search American Airlines flights
United AirlinesPriceFrom $318Free CancellationRating
7.4
9,927 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
Maryville
Murphy
Crossville
Oak Ridge
Kodak
Newport
Lenoir City
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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