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ONT - TYS

Find cheap flights from Ontario to Knoxville from $99

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Knoxville departing on 5/28. 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
0 bags
Tue 6/4
Tue 6/11

Search hundreds of travel sites at once for deals on flights to Knoxville

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Knoxville, 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 Ontario to Knoxville, as well as popular online travel agencies
In the last 7 days travelers have searched 43,369,418 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

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Cheap flight deals from Ontario to Knoxville (ONT-TYS)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Knoxville 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 and deals for you by selecting your travel dates.
Choose your dates
12:49 am - 5:17 pmONT-TYS
13h 28m1 stop
6:17 pm - 12:32 pmTYS-ONT
21h 15m1 stop
$198Frontier
Find Deal
Tue, Aug 13 - Mon, Aug 19
12:49 am - 4:50 pmONT-TYS
13h 01m1 stop
5:40 pm - 11:44 pmTYS-ONT
9h 04m1 stop
$206Frontier
Find Deal
Fri, Aug 9 - Sat, Aug 17
12:40 pm - 12:19 amONT-TYS
8h 39m1 stop
6:27 pm - 10:03 pmTYS-ONT
6h 36m1 stop
$228American Airlines
Find Deal
Tue, Aug 13 - Tue, Aug 20
12:40 pm - 12:19 amONT-TYS
8h 39m1 stop
5:10 am - 11:53 amTYS-ONT
9h 43m2 stops
$231American Airlines
Find Deal
Sat, Aug 10 - Sat, Aug 17
10:59 pm - 12:02 pmONT-TYS
10h 03m2 stops
2:30 pm - 7:05 pmTYS-ONT
7h 35m1 stop
$281Delta
Find Deal
Tue, Aug 13 - Tue, Aug 20
10:59 pm - 11:04 amONT-TYS
9h 05m1 stop
5:35 am - 11:10 amTYS-ONT
8h 35m1 stop
$282Delta
Find Deal
Wed, Aug 14 - Sun, Aug 18
6:00 am - 3:48 pmONT-TYS
6h 48m1 stop
4:48 pm - 9:02 pmTYS-ONT
7h 14m1 stop
$438United Airlines
Find Deal
Mon, Aug 12 - Mon, Aug 19
4:24 pm - 11:13 amONT-TYS
15h 49m2 stops
6:17 pm - 11:39 pmTYS-ONT
8h 22m1 stop
Tue, Jul 23 - Mon, Jul 29
6:02 am - 5:37 pmONT-TYS
8h 35m1 stop
4:25 pm - 8:32 pmTYS-ONT
7h 07m1 stop
$563United Airlines
Find Deal
Mon, Oct 21 - Sat, Oct 26
12:49 am - 4:50 pmONT-TYS
13h 01m1 stop
2:16 pm - 11:59 pmTYS-ONT
12h 43m2 stops
Fri, Jul 5 - Fri, Jul 12

Flights from Ontario to Knoxville - Travel Insights & Trends

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

What’s the cheapest day of the week to fly from Ontario to Knoxville?

The average price of all flights from Ontario to Knoxville clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Ontario to Knoxville, look for departures on Wednesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Knoxville, Tuesday is the cheapest day to fly and Sunday is the most expensive.

What is the cheapest month to fly from Ontario to Knoxville?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Ontario to Knoxville, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Ontario to Knoxville is September, where tickets cost $487 on average. On the other hand, the most expensive months are June and March, where the average cost of tickets is $666 and $637 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Ontario to Knoxville, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Ontario to Knoxville, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 68 days before departure.

Which airlines provide the cheapest flights from Ontario to Knoxville?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Ontario to Knoxville found on KAYAK was with Frontier for $99. Frontier proposed a round-trip connection from $198 and American Airlines from $228.

Good to know

Low season

January

High season

August

Cheapest flight

$99
Best time to beat the crowds with an average 21% drop in price.
Most popular time to fly with an average 3% increase in price.
Flight from Ontario to Knoxville

When to book flights from Ontario to Knoxville

Are your dates flexible? Find out the best times to travel from Ontario to Knoxville based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Knoxville

  • What is the cheapest flight from Ontario to Knoxville?

    In the last 3 days, the lowest price for a flight from Ontario to Knoxville was $99 for a one-way ticket and $198 for a round-trip.

  • Do I need a passport to fly between Ontario and Knoxville?

    No

  • Which aircraft models fly most regularly from Ontario to Knoxville?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Knoxville?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Ontario and Knoxville, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Knoxville, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Knoxville are Delta and United Airlines. With an average price for the route of $524 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $680 and an overall rating of 7.4.

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

    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 Ontario to Knoxville.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Knoxville from 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 Ontario to Knoxville?

    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 to Knoxville with an airline and back to Ontario with another airline. Booking your flights between Ontario and TYS can sometimes prove cheaper using this method.

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

    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 to Knoxville from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 4 airlines serving from Ontario to Knoxville

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Knoxville. 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 Ontario to Knoxville? 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.
8.0
DeltaOverall score based on 10826 reviews
8.2Boarding
8.0Entertainment
7.4Food
8.6Crew
7.9Comfort
Airline reviews

There was a loud squeaky sound the whole time we were flying.

6.0 GoodEliza, Apr 2024SAN - LAX
Read more about Delta reviews

There was a loud squeaky sound the whole time we were flying.

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Flight was great. DELTA did a fantastic job! ATL was busy, as usual!

Like most domestic flights in the US, you are basically on your own with this airline when it comes to food, so be sure to purchase meals and drinks ahead of time or expect to arrive starving and dehydrated (like I was).

You need to be a hacker to get the (Free) WiFi

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Due to one crew member not showing up to work, our flight was significantly delayed causing us to miss our connecting flight in Houston to Mississippi causing us to be delayed by more than 6 hours and missing our event all together. Very disappointing. All because ONE crew member called in sick. United did grant us a $15 meal voucher, which was a small but appreciated concession that I wasn’t able to use because I ordered my lunch and paid for it before applying the concession, and the staff said it was too late to use it. Ugh! We also had a TWO delay coming back from Mississippi, but that was on American Airlines and it was due to weather, so not their fault. Anyway, not at all impressed with United’s handling of our flight and the HUGE disappointment of missing our important family event for our 90 year old mother. All that money and all that stress and emotions for nothing. Having to wait the hour to bring an employee from LAX seemed like something that should not have happened. Why don’t you have a local back-up? Santa Ana is not a little airport in a rural area.

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

Awful. I got stuck next to a person carrying a dog and behind someone with a dog. People need to board these dogs downstairs. The cabin is crowded enough with your pets

Packed in like sardines, very uncomfortable. Sitting the aisle my shoulder was rammed into numerous times by rushing flight attendants. Also flight was very cold.

the head jack on my seat didn't work and the power outlet didn't work for my seat

Left 2 hours later for delayed I had to take care a kid with special need since people don’t want to move to accommodate the rest of the family. . It wasn’t bad but that made me upset that people can be that selfish.

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Comfort of seats, ease of boarding. Food selection could be better

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Crew were attentive and friendly. Flight was smooth and early! I enjoyed the less crowded plane. Thank you!

We are gluten free, there were not any available complimentary gluten free options.

Same basket of unhealthy prepackaged snacks (junk food) which was depleted by the time it got to my row!!

No meal on a cross country flight? SFO-MiA is pretty much the definition of a coast to coast flight. No meal provided. Sky high wi-fi rates too. Stop nickel and diming your customers.

The staff was unprofessional and didn’t communicate very well. The boarding process was very disheveled, potentially due to a power outage the previous day but there was no contingency plan to properly get passengers boarded the following day. Once boarded the aircraft stayed on the tarmac for over 45 minutes due to high winds. The communication was sporadic but an announcement was finally made an additional 30 minutes later that the flight was cancelled but we couldn’t get off the plane. Prior to deplaning one of the gate agents came on the plane and made an announcement for everyone to pickup their checked bags and take a card to rebook a new reservation because they didn’t have adequate staff. Flights were missed, passengers went to different airports and there was little to no assistance from AA.

Apart from the delay due to unforeseen circumstances. The leg from sjc to dfw was fine. It was the leg from dfw to orf that we encountered issues mainly due to the flight attendant crew not being friendly. We had two small children and we needed some assistance to warm up milk so the baby would sleep. The crew just didn’t get it and made things very difficult. One made a remark that the baby’s dirty diaper smell was a “gift” to the plane in a rude way. Normally I’d brush that off as a funny comment if the rest of the trip the attendants were helpful or understanding of the difficulty we faced. But that wasn’t the case. We were met with rudeness on the second leg. Whereas on the first leg the crew were so nice and helpful.

Not good 😐 Over priced baggage fees Small hard seats No wifi or entertainment options 😕

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

Terrible. Seats are bad and the baggage policy is inconsistent

Better than I expected but I did pay for a seat and carry on bags ahead of time.

I hope to avoid flying with them in the future. First flight got cancelled then got stuck with a 13 hour layover in Denver. The process was long and frustrating to many people.

Flight was delayed on the runway for 40 minutes the crew did not even offer even water to passengers to compensate for the flight delayed. The flight was delayed due to aircraft mechanical issues. Worst customer service ever

Book cheap flights from Ontario to Knoxville

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Ontario to Knoxville found on KAYAK in the last 72 hours.
5/28Tue
1 stopFrontier
12h 32mONT-TYS
$99
5/24Fri
1 stopFrontier
12h 09mONT-TYS
$120
5/25Sat
1 stopDelta
6h 38mONT-TYS
$139
6/12Wed
1 stopFrontier
7h 44mONT-TYS
$145
6/12Wed
1 stopFrontier
7h 44mONT-TYS
$169
5/27Mon
1 stopDelta
9h 05mONT-TYS
$269
5/23Thu
1 stopAmerican Airlines
7h 12mONT-TYS
$378
6/6Thu
2 stopsAmerican Airlines
10h 04mONT-TYS
$384
5/15Wed
1 stopUnited Airlines
6h 08mONT-TYS
$633
5/26Sun
3 stopsUnited Airlines
13h 41mONT-TYS
$645

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Last minute flights from Ontario to Knoxville

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Ontario to Knoxville that are departing in the next 10 days.
5/6Mon
multi-stopUnited Airlines
6h 08mONT-TYS
5/7Tue
multi-stopUnited Airlines
6h 48mTYS-ONT
$608
5/9Thu
multi-stopDelta
8h 01mONT-TYS
5/12Sun
multi-stopDelta
6h 37mTYS-ONT
$773
5/9Thu
multi-stopAlaska Airlines
15h 18mONT-TYS
5/12Sun
multi-stopAlaska Airlines
13h 18mTYS-ONT
$1,039
5/7Tue
multi-stopUnited Airlines
6h 08mONT-TYS
5/9Thu
multi-stopUnited Airlines
6h 48mTYS-ONT
$1,152

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Ontario - Knoxville Flights

Departure:

Ontario (ONT)United States

Destination:

Knoxville (TYS)United States

Return flight deals:

Knoxville - Ontario

Cabin classes: