JFK - ONT

$127 Find Cheap Flights from New York John F Kennedy Airport 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 John F Kennedy Intl to Ontario departing on 5/20. 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 New York 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 New York to Ontario, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$232
Overall average: $358
Frontier
Sun 4/19Sat 4/25
JFK - ONT • 1 stop
Cheapest non-stop
$462
Typical prices: $287-$352
JetBlue
Thu 5/14Wed 5/20
JFK - ONT • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Have your driver drop you off at Lefferts Blvd AirTrain.
Use the Metrolink San Bernardino Line to reach ONT.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Frontier
Cheapest • from $232 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
March
Cheapest • 32% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
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+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
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Flight Deals

Cheap Flights from John F Kennedy Intl to Ontario (JFK-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from John F Kennedy Intl 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 John F Kennedy Intl to Ontario

Sun, Apr 19 - Sat, Apr 25
Frontier Logo
7:30 am - 8:04 am
JFK
-
ONT
27h 34m
1 stop
Frontier Logo
7:18 pm - 6:30 am
ONT
-
JFK
8h 12m
1 stop
$232Frontier
Thu, Apr 9 - Mon, Apr 13
Frontier Logo
6:00 am - 8:04 am
JFK
-
ONT
29h 04m
2 stops
Frontier Logo
9:02 pm - 6:30 am
ONT
-
JFK
30h 28m
1 stop
$238Frontier
Sat, May 9 - Tue, May 12
Frontier Logo
7:30 am - 6:23 pm
JFK
-
ONT
13h 53m
1 stop
Frontier Logo
7:29 pm - 6:30 am
ONT
-
JFK
8h 01m
1 stop
$242Frontier
Thu, Apr 16 - Sat, Apr 18
Frontier Logo
11:30 am - 11:24 pm
JFK
-
ONT
14h 54m
2 stops
Frontier Logo
7:18 pm - 6:30 am
ONT
-
JFK
8h 12m
1 stop
$243Frontier
Tue, Apr 7 - Tue, Apr 14
Multiple Airlines Logo
4:29 pm - 11:59 pm
JFK
-
ONT
10h 30m
1 stop
Multiple Airlines Logo
7:29 pm - 6:30 am
ONT
-
JFK
8h 01m
1 stop
$249Multiple Airlines
Wed, Apr 22 - Mon, Apr 27
Frontier Logo
7:30 am - 1:40 pm
JFK
-
ONT
9h 10m
1 stop
Frontier Logo
11:44 am - 6:30 am
ONT
-
JFK
15h 46m
1 stop
$253Frontier
Thu, Apr 30 - Tue, May 5
Multiple Airlines Logo
4:29 pm - 11:59 pm
JFK
-
ONT
10h 30m
1 stop
Multiple Airlines Logo
2:44 pm - 6:30 am
ONT
-
JFK
12h 46m
1 stop
$254Multiple Airlines
Tue, Mar 17 - Tue, Mar 24
American Airlines Logo
8:19 am - 4:22 pm
JFK
-
ONT
11h 03m
1 stop
American Airlines Logo
11:58 pm - 11:31 am
ONT
-
JFK
8h 33m
1 stop
$257American Airlines
Wed, Mar 11 - Tue, Apr 7
American Airlines Logo
8:25 am - 1:48 pm
JFK
-
ONT
8h 23m
1 stop
American Airlines Logo
11:59 pm - 1:28 pm
ONT
-
JFK
10h 29m
1 stop
$261American Airlines
Tue, May 12 - Tue, May 19
Multiple Airlines Logo
7:30 am - 1:40 pm
JFK
-
ONT
9h 10m
1 stop
Multiple Airlines Logo
11:25 pm - 7:50 am
ONT
-
JFK
5h 25mnonstop
$264Multiple Airlines
Booking Insights

KAYAK's insights & trends for John F Kennedy Intl to Ontario flights

Get data-powered insights and trends into flights from John F Kennedy Intl to Ontario 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 New York John F Kennedy Airport to Ontario?

The average price of all round-trip flights from New York John F Kennedy Intl Airport to Ontario clicked on KAYAK for each day over the last 12 months.

When flying from New York John F Kennedy Airport to Ontario, you should consider leaving on a Friday and avoid Mondays if you are looking for the best rates. For your return to New York John F Kennedy Airport, you’ll find the best rates on Sundays and the most expensive ones on Thursdays.

What is the cheapest month to fly from New York John F Kennedy Intl Airport to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from New York John F Kennedy Intl Airport to Ontario, 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 New York John F Kennedy Intl Airport to Ontario is March, where tickets cost $237 (return) on average. On the other hand, the most expensive months are December and November, where the average cost of round-trip tickets is $654 and $408 respectively.

Can I save money by flying with a layover from New York John F Kennedy Intl Airport to Ontario?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $352 on average.

How far in advance should I book a flight from New York John F Kennedy Intl Airport to Ontario?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from New York John F Kennedy Intl Airport to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from New York John F Kennedy Intl Airport to Ontario, you should book around 2 weeks before departure, which saves you about 26% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Expert advice

Expert advice for your flight from John F Kennedy Intl to Ontario

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

Harriet Baskas

Harriet Baskas

Expert on JFK

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Good to know

Low seasonJanuary
Cheapest flight$127
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly and prices are also 18% lower on average.
Flight from New York John F Kennedy Airport to Ontario

When to book flights from John F Kennedy Intl to Ontario

Are your dates flexible? Find out the best times to travel from John F Kennedy Intl to Ontario 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 New York John F Kennedy Airport to Ontario flights

  • What is the cheapest flight from New York John F Kennedy Intl Airport to Ontario?

    In the last 3 days, the lowest price for a flight from New York John F Kennedy Intl Airport to Ontario was $127 for a one-way ticket and $232 for a round-trip.

  • Do I need a passport to fly between New York John F Kennedy Airport and Ontario?

    No

  • Which airlines offer Wi-Fi service onboard planes from New York John F Kennedy Airport to Ontario?

    JetBlue, Alaska Airlines, Hawaiian Airlines, Delta, and American Airlines offer inflight Wi-Fi service on the New York John F Kennedy Airport to Ontario flight route.

  • Which aircraft models fly most regularly from New York John F Kennedy Airport to Ontario?

    The Airbus A321-100/200 is the aircraft model that flies most regularly on the New York John F Kennedy Airport to Ontario flight route.

  • Which airline alliances offer flights from New York John F Kennedy Airport to Ontario?

    SkyTeam, and oneworld are the airline alliances operating flights between New York John F Kennedy Airport and Ontario, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from New York to Ontario, Delta or JetBlue?

    The two airlines most popular with KAYAK users for flights from New York to Ontario are Delta and JetBlue. With an average price for the route of $394 and an overall rating of 7.9, Delta is the most popular choice. JetBlue is also a great choice for the route, with an average price of $337 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from New York John F Kennedy Airport 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 New York John F Kennedy Airport to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from New York John F Kennedy Airport to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from New York John F Kennedy Airport 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 New York John F Kennedy Airport 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 to Ontario with an airline and back to New York John F Kennedy Airport with another airline. Booking your flights between New York John F Kennedy Airport and ONT 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 New York John F Kennedy Airport 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 to Ontario from New York John F Kennedy Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from New York John F Kennedy Intl Airport to Ontario

  • Looking for a cheap flight? 25% of our users found flights on this route for $352 or less round-trip.

Reviews of the top 4 airlines serving from John F Kennedy Intl to Ontario

 
See real verified KAYAK customer reviews for airlines flying from New York 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 John F Kennedy Intl 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 8200 reviews
7.9Comfort
7.8Entertainment
7.2Food
8.5Crew
8.1Boarding
Airline reviews

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

2.0 MediocreCindy, Feb 2026
JFK - LAX
Read more Delta reviews

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

The flight was comfortable and uneventful, which is what I desire

The plant way delayed departing by 3 hours. It was an old airplane with broken seats and armrests. The bathroom made a hollering sound. A really crappy flight experience and travel day all around.

None of the airplane features were available during the flight.

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

Plenty of leg room, temperature was great and staff was excellent. Would do it more often.

I truly love flying with Delta. They have always treated me with the upmost respect

The aircraft interior is old and tired on this aircraft. The entertainment system never worked despite the crews attempt to reset the system.

The flight was great. The gate location was way to far away!!!

I believe that a four-hour trip should have a meal. Delta had none.

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!!

I would like the crew to talk LESS over the PA and specifically about credit card offers. I am trying to work, sleep, watch a movie and the PA was booming about a credit card offer. Could we go back to the days when the customer was more important than selling a credit card?

There were no TV screens - even in Business class. 5 delays, and only given $12 meal voucher! Terrible!

My seat tv didn’t work the whole trip. And the seat space is too small despite being seated at the front.

Amazing I love American. I’ll never fly anyone else if I can help it.

On the plus side, crew was attentive, drinks were cold, and in-flight entertainment selection was better than some other airlines. On the negative aide, Plane was delayed almost an hour, either no announcements from the gate crew. Biscoff cookies are gross, appreciate airlines that give a choice. Also, crew had no personality or enthusiasm at all.

Baggage handling poor. Second time this has happened. My bag went to San Francisco instead of Fiji. No apology. Luckily Nadi airport staff are fantastic. My bag arrived in Fiji the next day.

Disliked having to wait a little longer to disembark from the plan when we landed in London

Food should be better quality. Video screens have poor resolution and the library of movies is poor. The other airlines are much better.

They only offered water for Group 6. Awful announcements from the Crew. Couldn't understand a single word. Barely came by for the trash afterwards. Man, I love water for a premium flight. Wow. Water in a cup.

Automated scanning was slow and somewhat haphazard. Too many people were unfamiliar with the tech and were forced to learn on the fly. The hands off approach of the gate staff made it more uncomfortable. This needs work. Overall the flight and cabin crew were excellent.

Crew were fantastic and so catering and wonderful! Full score for the entire crew!

Terrible. They canceled our early morning flight after midnight on the day of and had no available flights to rebook my family on for the next 72 hours. Yet they still had other flights that were not cancelled from JFK so it couldn’t be based on the weather. It felt like they canceled the flight based on it not being profitable enough for them. I am not interested in traveling with the again. The absolute worse customer service and lack of accountability.

First time flying with JetBlue and never again. I went to the counter to request meet and assist because I'm 74 and my wife is 79. I walk with a cane and my wife is handicapped and has her own wheel chair. I told the agent that my wife and luggage was at the entrance door. The ticketing agent said to me that they don't offer meet and assist. I need to bring them our luggage and then go back and get my wife in order to get my boarding pass. As I went back to get my luggage a Southwest agent along with a TSA agent recognized the situation and came over and took my wife and luggage to the JetBlue ticketing counter alongside the line and told the JetBlue agent to issue to take our luggage as soon as they could.

Flight was fine, price was good but food onboard was abysmal. I was on there for breakfast and lunch and dinner 845am EST to 845pm GMT and all I got was a yoghurt parfait, fruit and a piece of cake. Later snacks included an ice-cream brownie and a pizza twist. I was hungry by the time I landed and the airport amenities were closed. Not happy.

Not a pleasant experience, service was poor. Didn't like it

Everything was great. I liked the text updates so that I never miss a gate change & I have all the latest info.

No internet on a flight over three hours in this age is criminal. Staff inattentive and dismissive

Worst flight experience ever flights canceled. JetBlue told us just did not even bother standing in line to come back in one and a half hours then without any information we had to go pick up all of our luggage and spend over $2000 in accommodation just to get home. JetBlue said that the next flight available for us to get home would be three days later. Absolutely absurd hasn’t offered to give us any compensation do not fly JetBlue horrible company. They said it was based on the weather and the weather is great in all locations that we would’ve been flying to total hoax. I think it’s a conspiracy theory.

flight was delayed for hours with no explanation. The plane was a very old aircraft.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

i was unable to check in the flight. refund requested

I think Frontier was very good at communication. Their app worked very well. Loading was great and the flight was nice and easy.

Great for the price. No wifi or entertainment, but gate agents and crew were fantastic and we boarded quickly and left on time.

The worst. They don’t follow procedure for boarding per group. Flight got delayed for no understandably reasons, they changed our destination from PR to Miami, left us inside a plane for more than 8 hours, then cancelled flight in Miami leaving us stranded. Poorly managed re-accommodation for a new flight and overnight stay so I have to spend in a new ticket and my own hotel room to been able to get to my office next day. Lost 2 days of work and as a doctor, patients loosing their appointments. to other flights and besides

Decent clean onboard experience. Okay discount airline experience. Unfortunately, any customer service interactions are difficult and unhelpful. There is no service. Also, a premium seat only gets you premium boarding if you line up first. Once they start general boarding you must go to the back of the line. Not very premium

I was 2 hr arrive in the airport and 45 min in the line . After take to my turn . The agent tell me I’m later . I can not board . So my vacation was going to the floor . Just for their bad customer service agent in the airline

The crew was mostly okay. The flight attendant who answered our questions was curt and unhelpful unfortunately. He seemed upset and I understand having off days.

Very bad! No good service delayed my second connection flight

They canceled flight. Hard to believe there was even a plane incoming for us to get on

Everything you need to know for your flight from John F Kennedy Intl to Ontario

Information on your arrival and departure airports