ONT - EWR

$108 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 6/2. 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

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, 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 Newark, as well as popular online travel agencies
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Cheap Flights from Ontario to Newark

 
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.

Recent round-trip flight deals from Ontario to Newark

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to Newark.
Discover the best prices for you by selecting your travel dates on KAYAK.
 Logo
7:00 am - 5:48 amONT-EWR
19h 48m1 stop
 Logo
6:53 am - 9:51 pmEWR-ONT
17h 58m1 stop
Wed, Jun 18 - Tue, Jun 24
Alaska Airlines Logo
3:04 pm - 5:59 amONT-EWR
11h 55m1 stop
Alaska Airlines Logo
7:19 am - 2:09 pmEWR-ONT
9h 50m1 stop
$269Alaska Airlines
Find Deal
Tue, Sep 16 - Wed, Sep 24
United Airlines Logo
5:10 am - 5:20 pmONT-EWR
9h 10m1 stop
United Airlines Logo
8:05 am - 12:32 pmEWR-ONT
7h 27m1 stop
$282United Airlines
Find Deal
Sat, Aug 30 - Sat, Sep 13
Hawaiian Airlines Logo
3:04 pm - 5:59 amONT-EWR
11h 55m1 stop
Hawaiian Airlines Logo
5:48 pm - 11:53 pmEWR-ONT
9h 05m1 stop
$286Hawaiian Airlines
Find Deal
Tue, Sep 16 - Sat, Sep 20
United Airlines Logo
6:41 pm - 5:34 amONT-EWR
7h 53m1 stop
United Airlines Logo
11:30 am - 5:39 pmEWR-ONT
9h 09m1 stop
$287United Airlines
Find Deal
Tue, May 27 - Tue, Jun 3
Delta Logo
4:57 pm - 5:50 amONT-EWR
9h 53m1 stop
Delta Logo
6:59 pm - 11:42 pmEWR-ONT
7h 43m1 stop
$292Delta
Find Deal
Tue, May 27 - Mon, Jun 2
Hawaiian Airlines Logo
3:04 pm - 5:59 amONT-EWR
11h 55m1 stop
Hawaiian Airlines Logo
5:48 pm - 11:53 pmEWR-ONT
9h 05m1 stop
$296Hawaiian Airlines
Find Deal
Wed, Sep 17 - Sat, Sep 20
Delta Logo
7:05 pm - 11:45 amONT-EWR
13h 40m2 stops
Delta Logo
12:40 pm - 11:42 pmEWR-ONT
14h 02m2 stops
$297Delta
Find Deal
Fri, May 30 - Tue, Jun 3
American Airlines Logo
7:25 pm - 6:00 amONT-EWR
7h 35m1 stop
American Airlines Logo
6:00 am - 1:52 pmEWR-ONT
10h 52m1 stop
$313American Airlines
Find Deal
Tue, May 27 - Sun, Jun 1
American Airlines Logo
12:55 pm - 11:46 pmONT-EWR
7h 51m1 stop
American Airlines Logo
5:30 am - 11:59 amEWR-ONT
9h 29m1 stop
$322American Airlines
Find Deal
Wed, Jun 25 - Tue, Jul 1
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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.

What’s the cheapest day of the week to fly from Ontario to Newark Liberty Airport?

The average price of all round-trip flights from Ontario to Newark Airport clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Newark Liberty Airport on a Tuesday and more expensive on a Monday. On your return trip to Ontario, you should consider flying back on a Tuesday, and avoid Sundays for better deals.

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 January, where tickets cost $326 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $532 and $473 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 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.

Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$108
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly with an average 16% 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 $108 for a one-way ticket and $266 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?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Ontario and Newark Liberty Airport, with oneworld 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 $410 and an overall rating of 8.0, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $381 and an overall rating of 8.0.

  • 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.

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.
8.0
Alaska AirlinesOverall score based on 9968 reviews
7.1Entertainment
7.1Food
8.5Crew
7.9Comfort
8.2Boarding
Airline reviews

First time flying with any airline that has decent seating. Great experience crew was friendly and the pilot was as well.

10.0 ExcellentAnonymous, Apr 2025ONT - SEA
Read more Alaska Airlines reviews

First time flying with any airline that has decent seating. Great experience crew was friendly and the pilot was as well.

A little delay but nice flight, nice team. Thank you.

They lock the bathrooms too soon before landing! My bladder was bursting for over an hour. Then the plane had to sit on the taxiway for 1 hour. People started rushing to the bathroom. Creating a dangerous situation.

Didn’t like anything. Alaska boarding process takes too long and is poorly managed. Flight crew unorganized and too lax not very professional. I fly very frequently (weekly) and this as the worst overall trip I have ever taken.

Nothing! I just didn't eat or use entertainment. I had three seats all to myself and it was wonderful!!!!

No complaints. Great service. A first class entry lane at boarding wouldn’t hurt.

Awful . Extra charge on my bags even after it was confirmed it wasn’t overweight.

No entertainment and one bag of pretzel/beverage at the beginning of a 5 plus hour flight.

i liked that all seats had usb ports and a plug

Crew was great. Helpful, friendly, sense of humor. 👍🏽 Seat was really uncomfortable -- too concave ( why make them like that???) but worst, This is the first flight I've ever been on in my life where the seat did not have the option to recline!!! Whaaaat??? I was so sleepy but never was able to get comfortable enough to actually sleep. I forget which model of a plane it was exactly, but it was a 737 of some type.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

third trip overseas with delta recently where the TV did not work- not acceptable for a 8 hour flight! your food really has declined crew great and I am loyal to delta

The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.

Great staff. Wifi is terrible. Signing up for skylines is a painstaking process. Had to call customer service just to get my flight itinerary and confirmation sent to me. Consistent delays. A well staffed company that is run so poorly. Upper management needs to be renewed.

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

Everything was ok!! Just bags came up a little be late.

Tasty snacks. On-time departure and early arrival. Luggage arrived quickly at the carrousel. The only negative was a man behind us that was heavily inebriated. He was served 3 double drinks during the flight. There was no telling how much he had before the flight. He was so out of it that he spilled a drink and broke the heavy liquor glass on the floor. I don't believe he should have been served so much alcohol on a two-hour flight.

It was terrible, I sat next to a person with a cat, I'm allergic to animal dander, my discomfort was extreme

I sat in comfort plus. It was fine. Seats were comfortable. I got drinks and snacks.

Good and consistent Printer in lounge did not work for me :(

Multiple delays and not straight answer from the United team

I just got back from a trip with 3 flights each way. The flights were good and we were happy with out experience. There was one steward on our first flight that was harsh and grump with passengers. It did not leave a good impression. All of the other flight crews were great on the other five flights.

Food and flight attendents with positive dispositions and friendly behavior, more professional attitudes

Easy to board. Flight was super crowded though so I didn't sleep well on that cross country red-eye flight. The aisles seem ot have gotten narrower and the seat smaller whn luggage and people are getting bigger so it would be AWESOME to have more space and breathing room in general ;)

Liked the hospitality . The ight took us 6 hrs to get from fort myers to ewr.

Wish movie and music choices changed more often. Mostly same from a month or two ago when I last flew.

Overall great. I was forced to check my carry-on backpack from EWR to BOS but it came out on the luggage carousel so fast I didn't even get delayed for my pickup.

Boarding was easy. RDU gates can get crowded, be prepared to be patient. Flight was smooth, with excellent service. Pilots really provided a lot of visibility into flight details. Plane and seats were clean and serviceable. TY!

It was good. Just that the seats could not be reclined. The people behind were not ready to let the chairs be reclined

My flight was delayed. They boarded us, then no sooner were we on the plane, they made us get off again and wait another 45 minutes before doing it all over again.

Paid $35 and not able to access the internet at all.

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Cabin felt crammed Snacks are lame But crew was super efficient getting us out on time despite delay

Flight was delayed bc of mechanical issue. New plane had different configuration so some seats had to be switched. They called all passengers who needed new boarding cards. They did not call us so we thought our seats were the same and fine. When we boarded they informed us our receipts had changed and we are now all sitting separate and in the back row. Both my daughters had meltdowns and started to cry and once we got on the flight, we figured out how we could sit closer to each other, but this was very upsetting.

You ant watch TV if you don't have a device, the seats have more space, and the snacks are different.

Flight was empty so had a whole row to myself. Still had to wait to get the bag due to the negligence at Palm Springs departure.

Amazingly comfy flight - I had upgraded for a reasonable price and it was worth it. The food also was good.

Random carry-on baggage inspection before boarding for NO REASON. The crew kept talking loudly the entire time, making it impossible to rest. When I asked the crew for something, they said they would come back later but never did. It was an EXTREMELY UNPLEASANT and UNCOMFORTABLE flight.

Only thing that I liked it that I got to my destination safely, otherwise American Airlines stinks.

Ok. Got us there safely and a bit early. Need food available on this long flight. Almost 3 hours.

All was good expecting the seats need a bit of cushion. Besides that I can’t complain.

You get what you pay for, and the flights went smoothly. There’s no reclining chairs, no screens, And there isn’t always wifi, but the plane was clean and staff was friendly and the takeoff/landing were smooth.

We had an 8 hr delay so it was not good

Seats are poor. They do not lean back. They do not even have pockets on the back, making it impossible to store a phone or a coke bottle. If you opt for basic economy cheap seats, they stick you always in the middle or window seat, even though there are unoccupied seats on the aisle. And then there is the nickel and diming. No carry-ons. And checking your carry-on is $70. At the end there is no price advantage but there is plenty of aggravation.

The reservation was cancelled after a day and a half due to family reasons. There was no flight from Newark to Orlando 03.01.2025. Very bad customer service. Never use again.

Overall good experience for the price. Thank you for making travel affordable.

The seats were comfortable and not as tight as i would have expected. Would have been nice to be able to recline my seat, which was not available. Some form of free snacks and drink option would be appreciated as well, even just a water and small bag of crackers would have been better than nothing at all.

Be quiet! Why do they have to keep talking BS over the microphone?? Enough!

Bad seats. Very uncomfortable. Crew was fine. Too much upcsharging

hassled about bringing my laptop on in addition to my backpack...people boarding with real luggage were not stopped but I was which was ridiculous....zero comfort on board and everything is extra. Last time flying spirit not worth it

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