EWR - ONT

$80 Find Cheap Flights from Newark Liberty 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 Newark to Ontario departing on 5/5. 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 Newark 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 Newark 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
$218
Typical prices: $532-$333
Multiple Airlines
Tue 4/28Sat 5/2
EWR - ONT • 1 stop
Cheapest one-way
$80
Typical prices: $142-$308
Frontier
Tue 5/5
EWR - ONT • 1 stop
Top airlines
Cheapest • from $225 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Newark and Ontario. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $371 (round-trip)
Shortest trip • 7h 57m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 28% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 28% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Newark to Ontario (EWR-ONT)

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

Tue, Apr 28 - Sat, May 2
Multiple Airlines Logo
2:55 pm - 10:44 am
EWR
-
ONT
22h 49m
1 stop
Multiple Airlines Logo
7:44 pm - 6:30 am
ONT
-
EWR
7h 46m
1 stop
$218Multiple Airlines
Wed, May 13 - Fri, Jun 12
Frontier Logo
1:30 pm - 7:11 pm
EWR
-
ONT
8h 41m
1 stop
Frontier Logo
6:47 pm - 12:30 pm
ONT
-
EWR
14h 43m
1 stop
$225Frontier
Thu, Jun 4 - Thu, Jun 18
Frontier Logo
1:30 pm - 7:11 pm
EWR
-
ONT
8h 41m
1 stop
Frontier Logo
6:47 pm - 12:30 pm
ONT
-
EWR
14h 43m
1 stop
$235Frontier
Fri, May 29 - Thu, Jun 18
Frontier Logo
1:30 pm - 7:11 pm
EWR
-
ONT
8h 41m
1 stop
Frontier Logo
6:47 pm - 12:30 pm
ONT
-
EWR
14h 43m
1 stop
$236Frontier
Wed, Apr 15 - Fri, Apr 17
Multiple Airlines Logo
8:00 am - 6:49 pm
EWR
-
ONT
13h 49m
1 stop
Multiple Airlines Logo
11:44 am - 6:30 am
ONT
-
EWR
15h 46m
1 stop
$240Multiple Airlines
Tue, Apr 28 - Tue, May 5
Multiple Airlines Logo
2:55 pm - 10:44 am
EWR
-
ONT
22h 49m
1 stop
Multiple Airlines Logo
8:06 pm - 11:20 am
ONT
-
EWR
12h 14m
1 stop
$242Multiple Airlines
Tue, Apr 28 - Sat, May 2
Multiple Airlines Logo
10:29 pm - 6:49 pm
EWR
-
ONT
23h 20m
2 stops
Multiple Airlines Logo
7:44 pm - 6:30 am
ONT
-
EWR
7h 46m
1 stop
$246Multiple Airlines
Thu, May 14 - Wed, Jun 10
Frontier Logo
1:30 pm - 7:11 pm
EWR
-
ONT
8h 41m
1 stop
Frontier Logo
6:47 pm - 12:30 pm
ONT
-
EWR
14h 43m
1 stop
$250Frontier
Mon, Jun 1 - Mon, Jun 15
Frontier Logo
1:30 pm - 7:11 pm
EWR
-
ONT
8h 41m
1 stop
Frontier Logo
6:47 pm - 12:30 pm
ONT
-
EWR
14h 43m
1 stop
$251Frontier
Thu, Jun 4 - Sun, Jun 14
Frontier Logo
1:30 pm - 7:11 pm
EWR
-
ONT
8h 41m
1 stop
Frontier Logo
6:47 pm - 12:30 pm
ONT
-
EWR
14h 43m
1 stop
$255Frontier
Booking Insights

KAYAK's insights & trends for Newark to Ontario flights

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

How much is a round-trip flight from Newark Airport to Ontario?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Newark Airport to Ontario departing in April.

What is the cheapest month to fly from Newark Airport to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Newark 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 Newark Airport to Ontario is September, where tickets cost $296 (return) on average. On the other hand, the most expensive months are June and February, where the average cost of round-trip tickets is $556 and $536 respectively.

How far in advance should I book a flight from Newark 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 Newark 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 Newark Airport to Ontario, you should book around 2 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$80
Best time to beat the crowds but there is an average 29% increase in price.
Most popular time to fly with an average 34% increase in price.
Flight from Newark Liberty Airport to Ontario

When to book flights from Newark to Ontario

Are your dates flexible? Find out the best times to travel from Newark 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 Newark Liberty Airport to Ontario flights

  • What is the cheapest flight from Newark Airport to Ontario?

    In the last 3 days, the lowest price for a flight from Newark Airport to Ontario was $80 for a one-way ticket and $218 for a round-trip.

  • Do I need a passport to fly between Newark Liberty Airport and Ontario?

    No, a passport isn't needed to fly from Newark Liberty Airport to Ontario. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Newark Liberty Airport to Ontario?

    Newark Liberty Airport airport is called Newark and the only airport in Ontario is Ontario.

  • Which aircraft models fly most regularly from Newark Liberty Airport to Ontario?

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

  • Which airline alliances offer flights from Newark Liberty Airport to Ontario?

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

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

    The two airlines most popular with KAYAK users for flights from Newark to Ontario are Delta and United Airlines. With an average price for the route of $428 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $458 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Newark Liberty 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 Newark Liberty Airport to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Newark Liberty 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 Newark Liberty 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 Newark Liberty Airport with another airline. Booking your flights between Newark Liberty 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 Newark Liberty 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 Newark Liberty Airport 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 Newark to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Newark 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 Newark 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 8369 reviews
7.9Comfort
8.5Crew
7.8Entertainment
7.2Food
8.1Boarding
Airline reviews

Flight delayed. Air broken. Cabin was hot enough to pass out. Delta shuttle’s becoming worse and worse.

2.0 MediocreWilliam, Apr 2026
LGA - BOS
Read more Delta reviews

Flight delayed. Air broken. Cabin was hot enough to pass out. Delta shuttle’s becoming worse and worse.

my mom urmila patel needed a wheelchair which was not available on the curbside. she needed to walk almost 50 meters inside (at the risk of falling) and then had to wait in line to get a wheelchair (this is not ok). Once obtained she had to seat in it for 30-45 minutes for someone to take her in thru the checkin process (which was fairly smooth and easy). the lady who helped her with her checkin process was very courteous and helpful

This was the worse experience. They delayed our flight twice and we still had to find another flight to get home sooner which was alos delayed. Also, the flight attendant named Ginny on DL9890 leaving at 4:13pm on 3/23/26 was extremely rude.

I love Delta the flight attendants were personable and the flight arrived 1/2 earlier thanks expected. All a plus. The gate agent was a bit flustered but even with that I still had a good experience. Her supervisor assisted me.

I am still at the Airport! Delayed Delayed and Delyaed

The first class flight attendant was awful to everyone. Very rude; no customer service. She should not be working in first class.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Delayed. Hot. Passenger next to me was so large I couldn’t move.

The flight went very well, but the flight attendants didn't serve and food or drinks other than 1st class due to rough air but to be honest it wasn't that bumpy and I felt that they could've at least offered water and coffee perhaps. Also serving 1st class only is a bad look. I've been in 1st class many times and I would've felt that if the turbulence was too rough for the main cabin, it would be too rough for 1st class too.

There was an unruly family behind us that made the short flight miserable!!! The cabin crew did nothing to contain it.

They promise free wi-fi prior to boarding and then once on board you are informed you have to purchase wifi even after being a mileagePlus member.

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Everything went well except the turbulence what no one have a control of but pilot and crew handled very good!

Much better than Spirit. I was please by the easy fast check in and boarding

The attendant on board was amazing. She should be doing business/first international long haul.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

Flight was delayed 8 times. We were sitting at the airport for 14 hours. We got 2 hours of sleep (if that) on what was not meant to be a red-eye.

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

Flight was timely, relatively comfortable, with decent entertainment and food served. Only problem encountered was with the free messaging which I highly appreciate, but it did not work from iphone to non-iphones.

This flight was perfect. No complaints and only the highest regard for the crew and ground staff and how they executed perfectly. I fly a lot with United and would request predictability and transparency in their operations instead of last minute changes.

My flight from LGA was cancelled and my rebooked flight from JFK was delayed numerous times. I will now be getting home after 2am.

Flight was delayed half hour before boarding, but when I checked flight aware the plane that would Pick us up had a delay of more than an hour. AA should let us know in advance to avoid waiting several hours in the airport

There was no inflight service. Once we landed we were delayed to find a gate for an hour and a half which was 1/2 the total time in the air.

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

The gate agent had a really bad attitude and refused to help me get on the standby list. She just handed me a card and said I needed to call a number. I asked her to help with the AA app on my phone and she just shrugged and said she didnt know. After a few phone calls, I eventually just went to a different gate agent on the other side of the terminal and got the help I needed.

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 am very appreciative of the help provided to me by Dennis and Whitney. I had lost my phone at EWR airport and they were very kind in assisting me. This included advice on how to file a report and also helping me connect with family. The pilot was also great about keeping passengers updated on the flight progress with regular communications over the system.

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?

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.

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

Information on your arrival and departure airports