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Cheap flights from Knoxville to Los Angeles from $129

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Los Angeles departing on 8/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Frontier Logo
8:33 pm - 11:50 pmTYS-ONT
6h 17m1 stop
Frontier Logo
12:59 am - 7:41 pmONT-TYS
15h 42m1 stop
$265Frontier
Find Deal
Sun, Aug 24 - Sat, Aug 30
Frontier Logo
5:25 pm - 11:50 pmTYS-ONT
9h 25m1 stop
Frontier Logo
12:59 am - 7:41 pmONT-TYS
15h 42m1 stop
$267Frontier
Find Deal
Sun, Aug 17 - Wed, Aug 20
Delta Logo
6:10 pm - 10:41 pmTYS-ONT
7h 31m1 stop
Delta Logo
10:59 pm - 9:11 amONT-TYS
7h 12m1 stop
$289Delta
Find Deal
Thu, Dec 4 - Mon, Dec 8
American Airlines Logo
6:00 am - 11:56 amTYS-ONT
8h 56m2 stops
American Airlines Logo
2:51 pm - 12:23 amONT-TYS
6h 32m1 stop
$294American Airlines
Find Deal
Wed, Sep 24 - Wed, Oct 8
Frontier Logo
5:08 pm - 7:53 amTYS-ONT
17h 45m1 stop
Frontier Logo
8:59 pm - 4:18 pmONT-TYS
16h 19m1 stop
$295Frontier
Find Deal
Sun, Sep 14 - Sat, Sep 20
Delta Logo
6:14 pm - 10:20 pmTYS-ONT
7h 06m1 stop
Delta Logo
11:45 am - 11:48 pmONT-TYS
9h 03m1 stop
$314Delta
Find Deal
Thu, Aug 14 - Sun, Aug 24
American Airlines Logo
6:18 pm - 9:58 pmTYS-ONT
6h 40m1 stop
American Airlines Logo
10:34 am - 12:05 amONT-TYS
10h 31m2 stops
$319American Airlines
Find Deal
Thu, Dec 4 - Mon, Dec 8
American Airlines Logo
12:03 pm - 6:24 pmTYS-ONT
9h 21m2 stops
American Airlines Logo
11:59 pm - 1:03 pmONT-TYS
10h 04m2 stops
$324American Airlines
Find Deal
Tue, Aug 19 - Mon, Aug 25
United Airlines Logo
4:35 pm - 8:54 pmTYS-ONT
7h 19m1 stop
United Airlines Logo
6:38 pm - 10:28 amONT-TYS
12h 50m2 stops
$409United Airlines
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Thu, Aug 14 - Fri, Aug 22
United Airlines Logo
5:00 pm - 9:37 pmTYS-ONT
7h 37m1 stop
United Airlines Logo
6:50 pm - 10:13 amONT-TYS
12h 23m2 stops
$441United Airlines
Find Deal
Tue, Aug 12 - Mon, Aug 25

American Airlines flights from Knoxville to Ontario

Our best American Airlines deals on Knoxville to Ontario flight tickets
American Airlines
Sep 24
TYS6:00 amKnoxville McGhee Tyson
8h 56m
2 stops
ONT11:56 amOntario
Oct 8
ONT2:51 pmOntario
6h 32m
1 stop
TYS12:23 amKnoxville McGhee Tyson
$294
Find similar
American Airlines
Dec 4
TYS6:18 pmKnoxville McGhee Tyson
6h 40m
1 stop
ONT9:58 pmOntario
Dec 8
ONT10:34 amOntario
10h 31m
2 stops
TYS12:05 amKnoxville McGhee Tyson
$319
Find similar
American Airlines
Aug 19
TYS12:03 pmKnoxville McGhee Tyson
9h 21m
2 stops
ONT6:24 pmOntario
Aug 25
ONT11:59 pmOntario
10h 04m
2 stops
TYS1:03 pmKnoxville McGhee Tyson
$324
Find similar

United Airlines flights from Knoxville to Ontario

Our best United Airlines deals on Knoxville to Ontario flight tickets
United Airlines
Aug 14
TYS4:35 pmKnoxville McGhee Tyson
7h 19m
1 stop
ONT8:54 pmOntario
Aug 22
ONT6:38 pmOntario
12h 50m
2 stops
TYS10:28 amKnoxville McGhee Tyson
$409
Find similar
United Airlines
Aug 12
TYS5:00 pmKnoxville McGhee Tyson
7h 37m
1 stop
ONT9:37 pmOntario
Aug 25
ONT6:50 pmOntario
12h 23m
2 stops
TYS10:13 amKnoxville McGhee Tyson
$441
Find similar
United Airlines
Aug 12
TYS5:45 amKnoxville McGhee Tyson
14h 40m
2 stops
ONT5:25 pmOntario
Aug 22
ONT6:38 pmOntario
12h 50m
2 stops
TYS10:28 amKnoxville McGhee Tyson
$446
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Ontario 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 2, 2025.
Use the filters below to find and compare flights from Knoxville to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Sun 8/24

8:33 pm-11:50 pm

1 stop6h 17m

Ontario

Sat 8/30

12:59 am-7:41 pm

1 stop15h 42m

$265

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Sun 8/17

5:25 pm-11:50 pm

1 stop9h 25m

Ontario

Wed 8/20

12:59 am-7:41 pm

1 stop15h 42m

$267

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Thu 12/4

6:10 pm-10:41 pm

1 stop7h 31m

Ontario

Mon 12/8

10:59 pm-9:11 am

1 stop7h 12m

$289

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Wed 9/24

6:00 am-11:56 am

2 stops8h 56m

Ontario

Wed 10/8

2:51 pm-12:23 am

1 stop6h 32m

$294

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Sun 9/14

5:08 pm-7:53 am

1 stop17h 45m

Ontario

Sat 9/20

8:59 pm-4:18 pm

1 stop16h 19m

$295

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Thu 8/14

6:14 pm-10:20 pm

1 stop7h 06m

Ontario

Sun 8/24

11:45 am-11:48 pm

1 stop9h 03m

$314

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Thu 12/4

6:18 pm-9:58 pm

1 stop6h 40m

Ontario

Mon 12/8

10:34 am-12:05 am

2 stops10h 31m

$319

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Tue 8/19

12:03 pm-6:24 pm

2 stops9h 21m

Ontario

Mon 8/25

11:59 pm-1:03 pm

2 stops10h 04m

$324

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Thu 8/14

4:35 pm-8:54 pm

1 stop7h 19m

Ontario

Fri 8/22

6:38 pm-10:28 am

2 stops12h 50m

$409

KnoxvilleOntario

TYS - ONT

TYSONT

Knoxville McGhee Tyson

Tue 8/12

5:00 pm-9:37 pm

1 stop7h 37m

Ontario

Mon 8/25

6:50 pm-10:13 am

2 stops12h 23m

$441

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Knoxville to Ontario

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 Ontario?

In general, January is the cheapest month to fly from Knoxville to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $288. If you aren’t able to travel during the month of January, then book flights to Ontario from Knoxville during February instead. Flights to Ontario in February, while not as cheap as those in January, still average around $313.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $379. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Knoxville to Ontario for around $507.

What is the cheapest time of day to depart on your flight to Ontario?

In the evening is the cheapest time of day to fly from Knoxville to Ontario when you can find flight prices for as low as $319. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $440 on average. Flights to Ontario from Knoxville in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $393 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Knoxville for as low as $294 on momondo.

How have Knoxville to Ontario flight prices changed over time?

As of August 2025, prices for Knoxville to Ontario flights are approximately 8% cheaper when compared to flights at the same time last year.

When to book flights from Knoxville to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Knoxville to Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Knoxville to Ontario (TYS to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Ontario

Best Price Found

$129

Fastest flight time

6h 12m

Direct flights

None

Airports in Ontario

1 airport
The best one-way flight to Ontario from Knoxville in the past 72 hours is $129. The best round-trip flight deal from Knoxville to Ontario found on momondo in the last 72 hours is $265.
The fastest flight from Knoxville to Ontario takes 6h 12m
There are no direct flights from Knoxville to Ontario. Popular non-direct route for this connection is Knoxville McGhee Tyson Airport - Ontario Airport.
There is 1 airport near Ontario: Ontario (ONT)
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  • How far is Knoxville McGhee Tyson to Ontario by plane?

    There are 1902.5 mi between Knoxville McGhee Tyson and Ontario. In terms of flight time, this usually takes a little over 6h 12m.

  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Ontario Airport?

    Prices for flights from Knoxville McGhee Tyson Airport to Ontario Airport are updated daily.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Ontario Airport?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Ontario 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 Knoxville McGhee Tyson Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Knoxville to Ontario?

Best airlines flying from Knoxville to Ontario

Compare and see reviews for airlines that fly from Knoxville to Ontario with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $258Free CancellationRating
7.4
8,904 reviews
Search United Airlines flights
DeltaPriceFrom $288Free CancellationRating
8.0
7,983 reviews
Search Delta flights
American AirlinesPriceFrom $288Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Ontario?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Knoxville to Ontario. momondo saves you time and could save you money on your trip.

Can I find flights from Knoxville to Ontario with flexible booking policies on momondo?

momondo does allow users to show only those flights to Ontario from Knoxville which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Knoxville to Ontario?

Once you have performed a search for Knoxville to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Knoxville to Ontario right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Knoxville to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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