ONT - EWR

$152 Find Cheap Flights from Ontario to Newark Liberty Airport - Compare and Save

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 8/18. 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

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Everything you should know

Cheapest round-trip
$322
Typical prices: $332-$517
Frontier
Sat 8/15Tue 8/25
ONT - EWR • 2 stops
Cheapest one-way
$152
Typical prices: $223-$368
Frontier
Tue 8/18
ONT - EWR • 1 stop
Top airlines
Cheapest • from $322 (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 $379 (round-trip)
Shortest trip • 7h 23m (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 27% 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
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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

Sat, Aug 15 - Tue, Aug 25
Frontier Logo
8:58 am - 12:31 pm
ONT
-
EWR
24h 33m
2 stops
Frontier Logo
1:35 pm - 8:36 am
EWR
-
ONT
22h 01m
1 stop
$322Frontier
Sat, Aug 8 - Tue, Aug 18
Frontier Logo
8:58 am - 12:31 pm
ONT
-
EWR
24h 33m
2 stops
Frontier Logo
1:35 pm - 8:36 am
EWR
-
ONT
22h 01m
1 stop
$331Frontier
Tue, Sep 15 - Wed, Oct 14
Frontier Logo
8:07 am - 12:27 pm
ONT
-
EWR
25h 20m
1 stop
Frontier Logo
11:30 am - 10:43 am
EWR
-
ONT
26h 13m
2 stops
$339Frontier
Sat, Aug 15 - Tue, Aug 18
Frontier Logo
8:58 am - 12:31 pm
ONT
-
EWR
24h 33m
2 stops
Frontier Logo
1:35 pm - 8:36 am
EWR
-
ONT
22h 01m
1 stop
$355Frontier
Tue, Oct 6 - Wed, Oct 7
Alaska Airlines Logo
6:56 pm - 6:59 am
ONT
-
EWR
9h 03m
1 stop
Alaska Airlines Logo
9:30 am - 6:03 pm
EWR
-
ONT
11h 33m
1 stop
$363Alaska Airlines
Tue, Sep 29 - Tue, Oct 13
Delta Logo
5:15 pm - 6:00 am
ONT
-
EWR
9h 45m
1 stop
Delta Logo
7:00 am - 12:22 pm
EWR
-
ONT
8h 22m
1 stop
$369Delta
Sun, Aug 9 - Tue, Aug 18
American Airlines Logo
8:01 pm - 6:00 am
ONT
-
EWR
6h 59m
1 stop
American Airlines Logo
6:30 am - 11:43 am
EWR
-
ONT
8h 13m
1 stop
$370American Airlines
Thu, Aug 13 - Wed, Aug 19
American Airlines Logo
12:59 pm - 11:59 pm
ONT
-
EWR
8h 00m
1 stop
American Airlines Logo
6:30 am - 11:43 am
EWR
-
ONT
8h 13m
1 stop
$371American Airlines
Wed, Aug 19 - Wed, Aug 26
Frontier Logo
7:56 pm - 10:30 am
ONT
-
EWR
35h 34m
2 stops
Frontier Logo
1:35 pm - 8:38 am
EWR
-
ONT
22h 03m
1 stop
$373Frontier
Sat, Aug 22 - Sun, Aug 30
American Airlines Logo
12:59 pm - 6:00 am
ONT
-
EWR
14h 01m
1 stop
American Airlines Logo
6:30 am - 1:54 pm
EWR
-
ONT
10h 24m
1 stop
$377American 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 August.

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 $362 (return) on average. On the other hand, the most expensive months are November and June, where the average cost of round-trip tickets is $596 and $590 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 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$152
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 2% lower on average.
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 5 days, the lowest price for a flight from Ontario to Newark Airport was $152 for a one-way ticket and $322 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, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Ontario to Newark are Alaska Airlines and Delta. With an average price for the route of $511 and an overall rating of 7.9, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $483 and an overall rating of 7.8.

  • 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 4 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
Alaska AirlinesOverall score based on 12607 reviews
7.1Food
7.8Comfort
8.1Boarding
8.5Crew
7.0Entertainment
Airline reviews

They treat me well because of my one world status. Crew is attentive and professional. One of the best airlines out there.

8.0 ExcellentM, Apr 2026
SFO - EWR
Read more Alaska Airlines reviews

They treat me well because of my one world status. Crew is attentive and professional. One of the best airlines out there.

My TSA pre check was left Off my boarding pass which was a large inconvenience.

They were so kind to us! The entire staff were so good to us when we had our service dog join our trip and we couldn't be more grateful!

I love a red eye flight. No lines to wait in. Lots of turbulence on the flight and a very shaky landing.

Crew was not happy to be there and neither was I 😭 well at least the lady that helped me.. I was stuck in the middle seat between two men. Totally my fault since I didn’t pay a fee to select my seat though. I recommend paying the fee even if you’re in a budget. It’s better than being placed aaaaallllllll the way in the back next to the smelly bathrooms. The seats didn’t recline either!! It was a red eye flight so I got no sleep whatsoever. Ordered a coffee and it tasted like…. Let’s just say it was horrible. I had to to return it to the same crew lady and she looked at me like this girl…. Sorry but I was not going to drink that- please take it back!! Oh and lastly, my luggage was completely broken and damaged. All wheels were missing by the time my luggage came around in the luggage cart. Lmao. Overall poor experience to say the least. Tickets were cheap though😂😂😂

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

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

One of the flight attendant was very rude and not helpful. The others were good. Also seats were dirty with food bags left on the seats. Looks like the plane wasn’t clean before we boarded.

Excellent, as always. Just a bit of comparison from the same routes. United has free blankets. Horrible terminal. EWR JetBlue. Updated terminal. EWR. Screens for each seat. Self service pantry and a lavatory in the middle of the plane. Alaska. Always has new planes neon lighting. Mood music for boarding and deplaning. No screens. Outlets yes. Offers water latter part of the flight. Which is nice. Excellent flight attendants. Customer service on phone or gates are always extra polite and friendly.

Love Alaska planes. New. Used to have music while boarding. Neon lights. Excellent service. Always. But no screens. And weird reclining method.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

The crew, and fellow passengers, were super gracious and kind. There seemed to be plenty of bin space even though the plane was full. It’s nice to get a glass of wine with dinner in Premiere seating, and there was a lot of food.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

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

My seat was changed at the last minute and I was moved to the last row, right next to the bathroom despite selecting my seat well in advance. I was also made to check my carry on due to space but when I got on the plane there was significant empty overhead space. Picking up my carry on from the luggage carousel added time to my trip which had already been extended due to delay.

Do not get fooled by the term “Delta One” flat bed! The seats were super narrow. The ottoman for the feet was so narrow that when you recline the seat in flat bed position, you can only fit one foot in the 8” width space. There was only 1 flight attendant for First Class. The breakfast took 2 hours to get served. Instead of offering French Toast, the served bread pudding. The champagne with orange juice or Mimosa tasted terrible. Almost all the movies offered were ridiculously old. For a long flight from San Francisco to NY, it was frustrating! I DO NOT RECOMMEND this flight!!!

It was a very smooth ride. Not sure on a flight departing at midnight can be much better but it was late arriving and I had an early day so really just the logistics.

Over 2.5 hour maintenance delay on first morning flight with no acknowledgement, compensation or even gesture of good will. Aircraft had overnighted at airport so issue should have been addressed prior to boarding. Over 3.5 hours before first slow and deliberate beverage service.

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

Premium Plus is a really good idea for longer flights

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

get E+, a must for 5 hours flight if you are tall

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 ;)

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

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

Our flight was delayed several times. It left 9 hours after scheduling. We had to sleep in the airport.

Agency very bad had to cancelled my booking too many changes in the flight changed my flight to 1 week

Our flight from JFK to Madrid was delayed. We had to go from one side of the Madrid airport (Terminal 4s to the far end of terminal 4 - Gate K98) to our gate in less than 30 minutes. Put passport control and security/baggage check and that’s very hard unless you’re Usain Bolt. I called Iberia Airlines and the telephone customer service told me that I was going to have to pay to re-book. Luckily the help desk in the airport (who was dealing with dozens of people from the same JFK-Madrid flight) did not charge us extra to reschedule to a flight 8 hours later. They also gave us a voucher for breakfast and lunch. Glad the actual person at the airport had some actual sense.

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

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.

The flight itself was excellent but the gate attendant made me check my carryon since she said it was an inch too big. I’ve had no problems with this carryon on recent flights on Qantas, Delta, Austrian, Southwest Airlines even though the overhead bins are the same size. there were other carryons in the bins that also looked larger than mine and there was room left in the bins for more. When I picked up my carryon from baggage claim one of the wheels had broken off.

Flight was scheduled at 11:26am but they keep Delaying until midnight. They waited at airport restless.

My seat was assigned last row behind restrooms No legroom’s I’m very Pettit Still was not comfortable Food choice was excellent

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

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

19 hr delay requiring a change to red eye. No lounge access without paying. Loss of seat upgrade fee.

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

Information on your arrival and departure airports