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Cheap flights from Ontario to Knoxville from $139

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 9/12. 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.
American Airlines Logo
12:37 pm - 11:22 pmONT  Ontario-TYS Knoxville McGhee Tyson
7h 45m1 stop Dallas/Fort Worth
American Airlines Logo
6:00 am - 9:29 amTYS  Knoxville McGhee Tyson-ONT Ontario
6h 29m1 stop Dallas/Fort Worth
$239American Airlines
Wed, Sep 9 - Wed, Sep 16
Southwest Logo
7:50 am - 7:45 pmONT  Ontario-TYS Knoxville McGhee Tyson
8h 55m2 stops Austin Bergstrom Nashville Intl
Southwest Logo
7:10 am - 2:10 pmTYS  Knoxville McGhee Tyson-ONT Ontario
10h 00m2 stops Nashville Intl Denver Intl
$250Southwest
Wed, Nov 11 - Sat, Nov 14
United Airlines Logo
5:00 am - 8:54 pmONT  Ontario-TYS Knoxville McGhee Tyson
12h 54m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
5:05 pm - 8:51 pmTYS  Knoxville McGhee Tyson-ONT Ontario
6h 46m1 stop Denver Intl
$271United Airlines
Mon, Nov 2 - Sat, Nov 7
Delta Logo
12:17 pm - 10:27 pmONT  Ontario-TYS Knoxville McGhee Tyson
7h 10m1 stop Atlanta Hartsfield-Jackson
Delta Logo
5:40 am - 11:05 amTYS  Knoxville McGhee Tyson-ONT Ontario
8h 25m1 stop Atlanta Hartsfield-Jackson
$277Delta
Sat, Sep 12 - Sat, Sep 19
Delta Logo
12:17 pm - 10:27 pmONT  Ontario-TYS Knoxville McGhee Tyson
7h 10m1 stop Atlanta Hartsfield-Jackson
Delta Logo
5:40 am - 11:05 amTYS  Knoxville McGhee Tyson-ONT Ontario
8h 25m1 stop Atlanta Hartsfield-Jackson
$277Delta
Wed, Sep 9 - Wed, Sep 16
American Airlines Logo
6:00 am - 4:42 pmONT  Ontario-TYS Knoxville McGhee Tyson
7h 42m1 stop Dallas/Fort Worth
American Airlines Logo
6:00 am - 9:29 amTYS  Knoxville McGhee Tyson-ONT Ontario
6h 29m1 stop Dallas/Fort Worth
$277American Airlines
Tue, Sep 22 - Sat, Sep 26
American Airlines Logo
12:42 pm - 11:31 pmONT  Ontario-TYS Knoxville McGhee Tyson
7h 49m1 stop Dallas/Fort Worth
American Airlines Logo
5:30 am - 9:40 amTYS  Knoxville McGhee Tyson-ONT Ontario
7h 10m1 stop Dallas/Fort Worth
$277American Airlines
Wed, Nov 4 - Sat, Nov 7
United Airlines Logo
5:00 am - 4:03 pmONT  Ontario-TYS Knoxville McGhee Tyson
8h 03m1 stop Denver Intl
United Airlines Logo
5:05 pm - 8:51 pmTYS  Knoxville McGhee Tyson-ONT Ontario
6h 46m1 stop Denver Intl
$280United Airlines
Mon, Nov 2 - Sat, Nov 7
Multiple Airlines Logo
11:45 am - 12:41 pmONT  Ontario-TYS Knoxville McGhee Tyson
21h 56m2 stops Denver Intl Orlando
Multiple Airlines Logo
6:30 am - 9:09 amTYS  Knoxville McGhee Tyson-ONT Ontario
29h 39m1 stop Las Vegas Harry Reid Intl
$296Multiple Airlines
Thu, Sep 17 - Mon, Sep 21
Multiple Airlines Logo
8:24 pm - 12:41 pmONT  Ontario-TYS Knoxville McGhee Tyson
13h 17m2 stops Las Vegas Harry Reid Intl Orlando
Multiple Airlines Logo
7:00 am - 10:30 amTYS  Knoxville McGhee Tyson-ONT Ontario
30h 30m1 stop Denver Intl
$300Multiple Airlines
Thu, Sep 10 - Sun, Sep 13

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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
TYS6:00 amKnoxville McGhee Tyson
6h 29m
1 stop
ONT9:29 amOntario
$239
American Airlines
Sep 22
ONT6:00 amOntario
7h 42m
1 stop
TYS4:42 pmKnoxville McGhee Tyson
Sep 26
TYS6:00 amKnoxville McGhee Tyson
6h 29m
1 stop
ONT9:29 amOntario
$295
American Airlines
Sep 22
ONT12:37 pmOntario
7h 45m
1 stop
TYS11:22 pmKnoxville McGhee Tyson
Sep 26
TYS6:00 amKnoxville McGhee Tyson
6h 29m
1 stop
ONT9:29 amOntario
$311

United Airlines flights from Ontario to Knoxville

Our best United Airlines deals on Ontario to Knoxville flight tickets
United Airlines
Nov 2
ONT5:00 amOntario
12h 54m
2 stops
TYS8:54 pmKnoxville McGhee Tyson
Nov 7
TYS5:05 pmKnoxville McGhee Tyson
6h 46m
1 stop
ONT8:51 pmOntario
$271
United Airlines
Nov 2
ONT5:00 amOntario
8h 03m
1 stop
TYS4:03 pmKnoxville McGhee Tyson
Nov 7
TYS5:05 pmKnoxville McGhee Tyson
6h 46m
1 stop
ONT8:51 pmOntario
$280
United Airlines
Nov 4
ONT5:00 amOntario
7h 00m
1 stop
TYS3:00 pmKnoxville McGhee Tyson
Nov 7
TYS10:51 amKnoxville McGhee Tyson
10h 10m
2 stops
ONT6:01 pmOntario
$282

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 August 14, 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 Ontario - TYS Knoxville McGhee Tyson

ONTTYS

Ontario

Wed 9/9

12:37 pm-11:22 pm

1 stop7h 45m

Knoxville McGhee Tyson

Wed 9/16

6:00 am-9:29 am

1 stop6h 29m

$239

OntarioKnoxville

ONT Ontario - TYS Knoxville McGhee Tyson

ONTTYS

Ontario

Wed 11/11

7:50 am-7:45 pm

2 stops8h 55m

Knoxville McGhee Tyson

Sat 11/14

7:10 am-2:10 pm

2 stops10h 00m

$250

OntarioKnoxville

ONT Ontario - TYS Knoxville McGhee Tyson

ONTTYS

Ontario

Mon 11/2

5:00 am-8:54 pm

2 stops12h 54m

Knoxville McGhee Tyson

Sat 11/7

5:05 pm-8:51 pm

1 stop6h 46m

$271

OntarioKnoxville

ONT Ontario - TYS Knoxville McGhee Tyson

ONTTYS

Ontario

Sat 9/12

12:17 pm-10:27 pm

1 stop7h 10m

Knoxville McGhee Tyson

Sat 9/19

5:40 am-11:05 am

1 stop8h 25m

$277

OntarioKnoxville

ONT Ontario - TYS Knoxville McGhee Tyson

ONTTYS

Ontario

Wed 9/9

12:17 pm-10:27 pm

1 stop7h 10m

Knoxville McGhee Tyson

Wed 9/16

5:40 am-11:05 am

1 stop8h 25m

$277
Quickest round-trip

OntarioKnoxville

ONT Ontario - TYS Knoxville McGhee Tyson

ONTTYS

Ontario

Tue 9/22

6:00 am-4:42 pm

1 stop7h 42m

Knoxville McGhee Tyson

Sat 9/26

6:00 am-9:29 am

1 stop6h 29m

$277

OntarioKnoxville

ONT Ontario - TYS Knoxville McGhee Tyson

ONTTYS

Ontario

Wed 11/4

12:42 pm-11:31 pm

1 stop7h 49m

Knoxville McGhee Tyson

Sat 11/7

5:30 am-9:40 am

1 stop7h 10m

$277

OntarioKnoxville

ONT Ontario - TYS Knoxville McGhee Tyson

ONTTYS

Ontario

Mon 11/2

5:00 am-4:03 pm

1 stop8h 03m

Knoxville McGhee Tyson

Sat 11/7

5:05 pm-8:51 pm

1 stop6h 46m

$280

OntarioKnoxville

ONT Ontario - TYS Knoxville McGhee Tyson

ONTTYS

Ontario

Thu 9/17

11:45 am-12:41 pm

2 stops21h 56m

Knoxville McGhee Tyson

Mon 9/21

6:30 am-9:09 am

1 stop29h 39m

$296

OntarioKnoxville

ONT Ontario - TYS Knoxville McGhee Tyson

ONTTYS

Ontario

Thu 9/10

8:24 pm-12:41 pm

2 stops13h 17m

Knoxville McGhee Tyson

Sun 9/13

7:00 am-10:30 am

1 stop30h 30m

$300

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?

Prices are currently low for flights on this route.

Typical prices usually range from $379 to $505.
The lowest price recently found on this route was $239.

What is the cheapest month to fly to Knoxville?

The month of November is, on average, the cheapest month to fly to Knoxville from Ontario, with most prices found around $415. If you aren’t able to travel during the month of November, then book flights to Knoxville from Ontario during September instead. Flights to Knoxville in September, while not as cheap as those in November, still average around $421.

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 $484 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 August 2026, prices for Ontario to Knoxville flights are approximately 59% 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

5h 40m

Direct flights

None
The fastest flight from Ontario to Knoxville takes 5h 40m
There are no direct flights from Ontario to Knoxville. There are no popular flight routes from Ontario to Knoxville.
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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 5h 40m 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 $276Free CancellationRating
7.8
8,502 reviews
Search Delta flights
American AirlinesPriceFrom $313Free CancellationRating
7.1
11,929 reviews
Search American Airlines flights
United AirlinesPriceFrom $319Free CancellationRating
7.4
10,108 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
Crossville
Murphy
Oak Ridge
Kodak
Newport
Dandridge
Lenoir City
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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