$178 Find Cheap Flights from Knoxville to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Knoxville to Ontario departing on 4/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Knoxville to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Knoxville to Ontario, as well as popular online travel agencies
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Flight Deals

Book Cheap Knoxville to Ontario Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Knoxville to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Knoxville to Ontario

Fri, Mar 27 - Sun, Mar 29
Multiple Airlines Logo
2:06 pm - 12:09 am
TYS
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YYZ
10h 03m
1 stop
Multiple Airlines Logo
3:40 pm - 8:08 am
YYZ
-
TYS
16h 28m
1 stop
$336Multiple Airlines
Thu, Mar 19 - Mon, Mar 30
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6:00 am - 4:30 pm
TYS
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YUL
10h 30m
2 stops
Multiple Airlines Logo
8:00 am - 2:10 pm
YUL
-
TYS
30h 10m
1 stop
$345Multiple Airlines
Fri, Mar 27 - Sun, Mar 29
Multiple Airlines Logo
7:15 am - 4:20 pm
TYS
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YYZ
9h 05m
2 stops
Multiple Airlines Logo
3:40 pm - 8:08 am
YYZ
-
TYS
16h 28m
1 stop
$366Multiple Airlines
Wed, Jun 3 - Wed, Jun 10
Multiple Airlines Logo
1:02 pm - 4:55 pm
TYS
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YYZ
27h 53m
1 stop
Multiple Airlines Logo
3:55 pm - 1:01 pm
YYZ
-
TYS
21h 06m
1 stop
$379Multiple Airlines
Wed, Apr 8 - Mon, Apr 13
American Airlines Logo
8:48 pm - 11:44 am
TYS
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YUL
14h 56m
1 stop
American Airlines Logo
12:30 pm - 9:21 pm
YUL
-
TYS
8h 51m
1 stop
$387American Airlines
Mon, Mar 2 - Thu, Mar 5
Multiple Airlines Logo
2:06 pm - 12:30 am
TYS
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YUL
10h 24m
1 stop
Multiple Airlines Logo
8:55 am - 12:00 pm
YUL
-
TYS
27h 05m
2 stops
$401Multiple Airlines
Tue, Mar 10 - Tue, Mar 17
Multiple Airlines Logo
4:05 pm - 10:15 pm
TYS
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YYZ
30h 10m
1 stop
Multiple Airlines Logo
3:40 pm - 10:40 am
YYZ
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TYS
19h 00m
1 stop
$405Multiple Airlines
Thu, May 7 - Fri, Jun 12
United Airlines Logo
7:00 am - 1:59 pm
TYS
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YOW
6h 59m
1 stop
United Airlines Logo
6:00 am - 10:41 am
YOW
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TYS
4h 41m
1 stop
$462United Airlines
Thu, Feb 26 - Sun, Mar 1
United Airlines Logo
6:45 am - 9:18 pm
TYS
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YOW
14h 33m
1 stop
United Airlines Logo
5:00 am - 8:37 pm
YOW
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TYS
15h 37m
2 stops
$469United Airlines
Fri, Mar 27 - Fri, Apr 3
Delta Logo
5:10 pm - 12:39 am
TYS
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YOW
7h 29m
2 stops
Delta Logo
5:40 am - 5:45 pm
YOW
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TYS
12h 05m
2 stops
$557Delta
Booking Insights

KAYAK's insights & trends for Knoxville to Ontario flights

Get data-powered insights and trends into flights from Knoxville to Ontario to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Knoxville to Ontario?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Knoxville to Ontario were found on American Airlines ($387) and United Airlines ($462).

Good to know

Cheapest flight$178
Flight from Knoxville to Montreal

FAQs - booking Ontario flights

  • How does KAYAK find such low prices on flights from Knoxville to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Knoxville to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Knoxville to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Knoxville to Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Knoxville to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Knoxville to Ontario with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Knoxville to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Knoxville to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Knoxville to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Knoxville to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Knoxville to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8186 reviews
8.1Boarding
7.9Comfort
7.2Food
8.5Crew
7.8Entertainment
Airline reviews

Awesome! On time flight, early arrival, and a complimentary upgrade!

10.0 ExcellentSarah, Feb 2026
SFO - LAX
Read more Delta reviews

Awesome! On time flight, early arrival, and a complimentary upgrade!

Paid for wifi that didn't work. No plug in seat to work. No entertainment.

We departed early and made up time in the air allowing us to arrive 30 minutes early. Capt was incredibly genuine and thanked every passenger for flying with Delta. Completely humble and professional!

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

This was one of the worst flights I’ve been on in years. I upgraded to comfort and had such an uncomfortable experience. The person next to me was oversized - which I understand - however, they took up their space and mine. I could only use about 50% of my seat space to not be physically touching this person the entire flight and there was no spatial awareness. I also could not use the seat outlet because their body was obstructing it. It was very inconvenient. Their body kept touching me repeatedly during the flight and I felt very uncomfortable. To pay more for an upgraded space and then not even being able to use it was highly disappointing.

No wheel chair as requested at Atlanta arrival on first flight.

Only freetext wifi was available in flight; browsing WiFi required payment. Since the seats had no in flight entertainment, Delta should revisit this policy on this longer flight.

Only water, tea or coffee served midflight, even to comfort seating. Man next to me needed two seats and took up a portion of my seat and Delta did nothing.

The flight was great as well as the airline staff

First class and monitors weren’t working for mine & my husbands. Eventually fixed, but quite annoyed as we bought first class. Also, No foot rests.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

I wish there were outlets to charge my iPhone. The crew was great; we had a female pilot who was great with explaining what was happening and delays,

The staff was hospitable and professional. The seat had a bit of wear. The winner shade was stuck 1/4 open. I received the best of both worlds. The morning sun was able to come in and blind the screen i was trying to use while at the same time it was too low to look out and enjoy the view. Rather embarrassing for a 1st class ticket.

Not United Airlines' fault. It's ORL airport's fault.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

Very nice flight love the small aircraft. We had a wonderful flight attendant. Nice to see someone that really enjoys her job. Don't have her name but had a southern accent.

Even though we were delayed, we were able to make our connection

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

The flight was on time/early, attentive crew, and everything overall went smoothly. Disappointed that WIFI was not working for the flight.

One day, I do so hope for a gluten free snack! Seems like with the rest of the world FINALLY figuring out what gluten free is, American Airlines would too. Fingers crossed!!

The flight was significantly delayed for 6.5 hours because of snow. There was no communication once the plane returned to the gate regarding when the flight would resume. Other flights were departing while our flight was being unloaded for reasons unknown. Our flight also seemed out of the queue regarding further deicing, refueling, and waiting to Taxi to the runway.

Flight was on time and the meal and service were good.

The accessible bathroom should be visible to people in Economy class.

Flight was delayed for 2 hours, then last minute the change to on time. The satélite location is far and a nightmare to get to.

This was a horrible experience. I’ve experienced several delays at this point and still not home. I was supposed to be home by 8:30 last night and here I sit at 7 am on a plane STILL unable to go home because of American Airlines.

Lexus in first class was absolutely amazing! Beat flight attendant i’ve ever seen.

Generally good. Flight left on time and the seats are comfortable. Plenty of space in front if you in you choose a comfort plus seat, completely worth spending the extra money given the amount of hours the flight lasts. The food tastes good but I would say it’s a the amount is too little. The crew was friendly and efficient. There was a some turbulence at different points into the flight. American Airlines has good deals to NZ if you book with plenty of time before you plan on going.

the plane was so hot!! the air-conditioning was barely blowing. The flight was delayed, and we had to sit on the hot plane before take off for an extended amount of time, waiting on international passengers. Would not have been so bad if it was not so hot. They said it would get better after take off, but it did not.

Everything you need to know for your flight from Knoxville to Ontario

Information on your arrival and departure airports