ONT - EWR

$125 Find Cheap Flights from Ontario to Newark Liberty Airport

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 Newark departing on 7/25. 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 Newark Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Newark.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Newark.
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Everything you should know

Cheapest round-trip
$317
Typical prices: $566-$351
Delta
Wed 9/2Sun 9/6
ONT - EWR • 1 stop
Cheapest one-way
$125
Typical prices: $148-$368
Frontier
Sat 7/25
ONT - EWR • 1 stop
Top airlines
Cheapest • from $317 (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 Ontario and Newark. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $332 (round-trip)
Shortest trip • 7h 24m (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 32% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 25% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+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 Newark!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Newark (ONT-EWR)

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

Wed, Sep 2 - Sun, Sep 6
Delta Logo
7:00 am - 5:47 pm
ONT
-
EWR
7h 47m
1 stop
Delta Logo
6:00 am - 11:04 am
EWR
-
ONT
8h 04m
1 stop
$317Delta
Tue, Sep 29 - Tue, Oct 6
American Airlines Logo
8:02 pm - 9:01 am
ONT
-
EWR
9h 59m
2 stops
American Airlines Logo
5:28 pm - 11:06 pm
EWR
-
ONT
8h 38m
1 stop
$322American Airlines
Wed, Sep 9 - Wed, Sep 16
Alaska Airlines Logo
10:47 am - 11:29 pm
ONT
-
EWR
9h 42m
1 stop
Alaska Airlines Logo
7:20 am - 2:16 pm
EWR
-
ONT
9h 56m
1 stop
$325Alaska Airlines
Sat, Oct 31 - Tue, Nov 3
American Airlines Logo
8:00 pm - 10:30 am
ONT
-
EWR
11h 30m
2 stops
American Airlines Logo
1:44 pm - 9:59 pm
EWR
-
ONT
11h 15m
2 stops
$327American Airlines
Tue, Aug 18 - Tue, Aug 25
American Airlines Logo
12:59 pm - 11:59 pm
ONT
-
EWR
8h 00m
1 stop
American Airlines Logo
1:33 pm - 10:58 pm
EWR
-
ONT
12h 25m
2 stops
$332American Airlines
Tue, Oct 27 - Sat, Oct 31
Frontier Logo
10:48 am - 12:27 pm
ONT
-
EWR
22h 39m
1 stop
Frontier Logo
1:30 pm - 11:55 pm
EWR
-
ONT
13h 25m
2 stops
$337Frontier
Tue, Oct 20 - Fri, Oct 23
Alaska Airlines Logo
6:54 pm - 6:59 am
ONT
-
EWR
9h 05m
1 stop
Alaska Airlines Logo
9:30 am - 6:00 pm
EWR
-
ONT
11h 30m
1 stop
$338Alaska Airlines
Thu, Aug 20 - Tue, Aug 25
American Airlines Logo
8:01 pm - 10:02 am
ONT
-
EWR
11h 01m
2 stops
American Airlines Logo
8:00 am - 1:31 pm
EWR
-
ONT
8h 31m
1 stop
$342American Airlines
Mon, Aug 17 - Tue, Aug 25
American Airlines Logo
11:59 pm - 11:31 am
ONT
-
EWR
8h 32m
1 stop
American Airlines Logo
1:33 pm - 10:58 pm
EWR
-
ONT
12h 25m
2 stops
$343American Airlines
Wed, Jun 3 - Sat, Jun 6
United Airlines Logo
6:30 pm - 5:38 am
ONT
-
EWR
8h 08m
1 stop
United Airlines Logo
2:40 pm - 8:46 pm
EWR
-
ONT
9h 06m
1 stop
$346United Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Newark flights

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Newark Airport, 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 Newark Airport is August, where tickets cost $346 (return) on average. On the other hand, the most expensive months are March and April, where the average cost of round-trip tickets is $586 and $561 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Newark Airport, 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 Ontario to Newark Airport, you should book around 2 weeks before departure, which saves you about 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$125
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Ontario to Newark Liberty Airport

When to book flights from Ontario to Newark

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

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

    In the last 3 days, the lowest price for a flight from Ontario to Newark Airport was $125 for a one-way ticket and $317 for a round-trip.

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

    No

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

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

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

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

  • What is the most popular layover when flying to Newark Liberty Airport from Ontario?

    Phoenix is the most popular layover city among KAYAK users traveling from Ontario to Newark Liberty Airport.

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

    The two airlines most popular with KAYAK users for flights from Ontario to Newark are Delta and Alaska Airlines. With an average price for the route of $452 and an overall rating of 7.9, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $511 and an overall rating of 7.9.

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

    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 Newark Liberty Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Newark Liberty Airport 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 Newark Liberty Airport?

    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 Newark Liberty Airport with an airline and back to Ontario with another airline. Booking your flights between Ontario and EWR 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 Newark Liberty Airport?

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

Reviews of the top 5 airlines serving from Ontario to Newark

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Newark. 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 Newark? 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 8451 reviews
8.5Crew
7.8Comfort
8.1Boarding
7.8Entertainment
7.2Food
Airline reviews

Very easy to use and convenient, you can perform any action within the same portal

10.0 ExcellentMurat, Apr 2026
ORD - LGA
Read more Delta reviews

Very easy to use and convenient, you can perform any action within the same portal

The baggage belt was not updated on the Delta App and was displayed on the wrong belt board. Was not expecting this to happen.

Landed without a gate ready. Plane is extremely old and dirty.

Pilots lied about waiting on “paperwork”. Sat in the plane for over an hour, waiting on some papers to be printed according to the pilot and then all of a sudden he says good news maintenance is finally on their way. Maybe they can fix it before we get our paperwork. Ended up missing my connection in LaGuardia and as a result, had a fly home to Lexington instead of the Louisville airport. Then paid $100 to uber to Louisville since it was midnight by the time I got in. I wish they would just be transparent with passengers sometimes and not try to beat around the bush on why things are delayed.

During the flight, the only refreshments provided were crackers and soft drinks; no substantial food was offered despite the international route. Furthermore, our initial flight was delayed, causing us to miss the connecting flight in Atlanta. The airline did not hold the connection, and we were informed that the next available flight is not for another 24 hours. While I am aware of alternative options via JetBlue, they operate out of JFK, which is not a viable solution for us as a resident of New Jersey.

The flight was delayed 90 minutes The Gate was wrong The Restroom on Aircraft was not clean There was a half used water bottle in my seat

Too many people are taking up space in the overhead bins with their extra piece of luggage. Since they cannot fit their backpacks or extra luggage piece under the seat in front of them, they store it in the overheads and thus taking up room for other passengers. It wasn’t only one or two persons; more like 12 or 13 passengers.

Got to fly my favorite plane, the Boeing 767-400ER, to Milan. The soft blush pink mood lighting during meal service was very beautiful and gorgeous. The service was top-notch, and our flights were on time. I highly recommend Delta.

Cabin was not pressurized properly. Several passengers had respiratory difficulties.

I was happy that I was able to get a last minute flight but unfortunately my seat was a middle seat. Even with Delta Comfort I wasn't comfortable

Flights were on time actually early service was good and crew cheerful

No meal service to the back of the plane as it started late or was too slow to get it out before it was time to land.

Experience was great - no complaints. Took off on time, landed early. Got to the gate relatively quickly - took a little bit of extra time to deplane but nothing excessive.

OK, we were delayed and had to de plane and reboard.

Both my flight where delayed Had 25min to make it to my transfer flight

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

There was no WiFi available, there were mechanical problems with the plane and we landed at C 124, then the gate was switched to A 26, then all the way back to C126! For a 75 yo woman traveling alone, this was a difficult journey, indeed!

2+ hours delayed Outlet in row 12 did not work Tv monitors did not work Lights kept off the entire flight for at 5pm-7pm flight

Plane outlets in my row not working to charge phone. Staff response was, well it should be. Plug into seed for volume not working well. Had to find the sweet spot for plug in or it would shut off and on.

I upgraded my seat and was promised it would be next to the emergency door for extra leg room and they said it was premium plus but it was at the back of the plane...same thing happened from Newark to Dubai

Jetblue provided a very good service during the flight, the plane in a very good condition, the crew is professional, everything was on time. That's it!

I have always loved JetBlue and had no complaints on my last trip… I will always recommend then. Thank you JetBlue

The comfortability was very good. Except, when entering the craft the the first steward never greeted us upon entering the airplane. He spoke too fast where his words were all jumbled and difficult to understand.

Jet blue was great But the Jayak system Wasa pure nightmare and wasted so much of my time and energy by not giving me a way to access jet blue to check in the flight back I didn’t even get the number confirmation code 24 hours before. Because I didn’t receive the email with the confirmation code I could NoT CHECk IN. I spoke to a kayak third party and they informed me I could not carry a carry on, on the flight which caused me so much extra stress it was just too much. You can be sure I will not be using it recommending your site. Again.

My experience with JetBlue was fine BUT I am very upset with Kayak! JetBlue had delayed our scheduled departure by an hour and you NEVER notified me of the change. I did not hear directly from JetBlue because the trip was booked through Kayak, a mistake I will not repeat. Your reminder of the our trip last week still had the WRONG departure time. Our return trip has also changed, and again no notice from you.

Right now I’m still in Jamaica waiting on a flight to New York which I should be in New York from the 30th and I’m here in Jamaica

Flight was as expected. But it was delayed an hour. Also, my luggage got damaged. So that sucked especially since the damage made navigating the airport difficult. Walking to get ground transportation is sooo far away now and my checked bag was difficult to carry.

Flight team was very courteous only complaint wS the boarding process and mandatory bag check

It was a great flight got here on time wish they would give headphones out for free

The flight was delayed 4 hours and the JetBlue people at the counter kept lying to us and telling us it was due to weather however all other flights were going in and out of NY and FL. Then they lied that the plane had to stop to refuel. Then they lied and said the plane needed a tire change. JetBlue is the worst. Then they gave a lot of people meal vouchers however I didn’t know they did that and they didn’t offer anything to me.

Terrible steward... Plane was quite empty... I asked to move "back" in the plane and the steward said no... Unnecessary power trip of mediocre people.

Boarding gate at LAX was too crowded—two gates next to one another

Returned home with a blood clot from flight homes and the uncomfortable aircraft I was on.

It was really a terrific experience both going and returning on AA. Staff and crew were professional.

This short sector between Miami and JFK was undertaken purely for business purposes, with efficiency as the primary objective rather than a full inflight experience. Overall, the journey met its intended purpose; however, the ground experience at Miami stood out significantly. During check-in, I was unable to link my frequent flyer details from Qatar Airways (oneworld alliance) through either the self-service kiosk or web check-in. The situation was handled exceptionally well by the check-in agent, who demonstrated remarkable ownership. She coordinated across multiple counters, ensured my frequent flyer number was correctly reflected, reissued the boarding pass, and confirmed that mileage accrual would be recognized. Additionally, she ensured the boarding pass reflected priority status, enabling a seamless priority check-in experience without delays. This level of proactive service was both commendable and impactful. Boarding and the inflight experience, operated by American Airlines under a codeshare arrangement, were efficient but largely transactional. While operational delivery was smooth, there was no visible recognition of oneworld frequent flyer status onboard. In comparison to the consistently personalized engagement typically experienced with Qatar Airways, this absence was noticeable—though understandably a potential limitation of codeshare alignment rather than a direct service shortfall. In summary, while the flight itself fulfilled its operational intent, the exceptional professionalism and commitment demonstrated at the Miami check-in counter was the defining highlight of this journey. Greater consistency in elite recognition across partner airlines would further enhance the overall experience.

Flight was fine, but not having WiFi was a major negative

Everything was excellent and I enjoyed myself. Thank for everything

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

We left at 1030 am pacific from LA and supposed to land at 7 pm Eastern in NY. They made a detour, stopped in Philadelphia and didn’t land till 1130 PM Eastern!!! Worst flight experience with no pilot communication with no explanation as to what was going on. Everyone was very frustrated to say the least.

Seat was VERY uncomfortable. Flight was delayed and then boarded slowly. The crew was super helpful with boarding and supporting maximizing the luggage in the overhead.

Great just wish they always had WiFi on every flight couldn’t even purchase it

Everything was smooth sailing. Great crew, easy flight and was surprised with an upgraded seat. Thank you all!

The worst. My flight was canceled :-- by email! -- at 10pm, just 8 hours prior to departure. Normally, given the early departure time, I would've been asleep. I was lucky to be awake and to be able to take action. Even worse, it turns out that the flight wasn't canceled (confirmed because I was at the airport and saw it loading), Spirit just canceled my reservation, probably because I got such a good rate! Utterly appalling. Notably, Spirit did not inform you (Kayak) of the change, so I kept getting alerts from you.

Delayed over two hours. Only knew about a 30 minute delay in advance

The flight was a big joke very uncomfortable I had a horrible experience and I will never fly with them again everything about the flight was bogus and I’m not happy with it at all this experience makes me not want to fly ever again

Smooth flight staff very friendly and we arrived 15 mins earlier

Length of flight was fine Delay of over 3 hours was very bad!! Flight down was delayed 1.5 hours

I’m still waiting to get on the flight. No one knows what’s happening. The passengers have gotten no updates. We have been up all night and waiting at the airport. This is no way to operate and we should be refunded for this lack of respect for their passengers.

When I arrived at the airport at 4:00 in the morning, I was notified that I "hadn't paid" for my ticket (I had paid and had a boarding pass). Then I was told that while I had paid, the ticket was $600 more than it actually was, and that I needed to pay that so I could board. None of this was true, of course, but it took 20 minutes, two crew members behind the desk, and one on the phone to clear up.

I was double booked for my ticket- they have record of it and admitted to their error but wouldn’t let me board until I paid once again for the fare- have documentation of their mistake -

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

Information on your arrival and departure airports