$142 Cheap Flights from Newark Liberty Intl. Airport (EWR) to Ontario (ONT)

View $142 flight on Sat, Jan 17, 2026Opens in a new window

Popular airlines from Newark Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Newark Liberty Intl. Airport to Ontario (EWR-ONT)

Prices were available within the past 7 days and start at $142 for one-way flights and $217 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Feb 17 - Fri, Feb 20
EWR
New York
ONT
Ontario
$217 Roundtrip, found 5 days ago
$217
Roundtrip
found 5 days ago
Select American Airlines flight, departing Tue, Feb 17 from New York to Ontario, returning Fri, Feb 20, priced at $217 found 5 days ago
United
Tue, Feb 10 - Wed, Feb 18
EWR
New York
ONT
Ontario
$270 Roundtrip, found 6 days ago
$270
Roundtrip
found 6 days ago
Select United flight, departing Tue, Feb 10 from New York to Ontario, returning Wed, Feb 18, priced at $270 found 6 days ago
United
Thu, Feb 19 - Sat, Feb 21
EWR
New York
ONT
Ontario
$280 Roundtrip, found 4 days ago
$280
Roundtrip
found 4 days ago
Select United flight, departing Thu, Feb 19 from New York to Ontario, returning Sat, Feb 21, priced at $280 found 4 days ago
Delta
Sat, Jan 17 - Tue, Jan 20
EWR
New York
ONT
Ontario
$283 Roundtrip, found 5 hours ago
$283
Roundtrip
found 5 hours ago
Select Delta flight, departing Sat, Jan 17 from New York to Ontario, returning Tue, Jan 20, priced at $283 found 5 hours ago
American Airlines
Fri, Feb 20 - Mon, Feb 23
EWR
New York
ONT
Ontario
$285 Roundtrip, found 3 days ago
$285
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Feb 20 from New York to Ontario, returning Mon, Feb 23, priced at $285 found 3 days ago
Delta
Wed, Jan 14 - Sat, Jan 17
EWR
New York
ONT
Ontario
$287 Roundtrip, found 3 days ago
$287
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Jan 14 from New York to Ontario, returning Sat, Jan 17, priced at $287 found 3 days ago
American Airlines
Mon, Nov 17 - Thu, Nov 27
EWR
New York
ONT
Ontario
$288 Roundtrip, found 5 days ago
$288
Roundtrip
found 5 days ago
Select American Airlines flight, departing Mon, Nov 17 from New York to Ontario, returning Thu, Nov 27, priced at $288 found 5 days ago
Delta
Fri, Jan 9 - Sat, Jan 17
EWR
New York
ONT
Ontario
$290 Roundtrip, found 3 hours ago
$290
Roundtrip
found 3 hours ago
Select Delta flight, departing Fri, Jan 9 from New York to Ontario, returning Sat, Jan 17, priced at $290 found 3 hours ago
Alaska Airlines
Thu, Dec 11 - Sun, Dec 14
EWR
New York
ONT
Ontario
$306 Roundtrip, found 4 hours ago
$306
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Thu, Dec 11 from New York to Ontario, returning Sun, Dec 14, priced at $306 found 4 hours ago
Hawaiian Airlines
Sat, Nov 22 - Thu, Dec 4
EWR
New York
ONT
Ontario
$417 Roundtrip, just found
$417
Roundtrip
just found
Select Hawaiian Airlines flight, departing Sat, Nov 22 from New York to Ontario, returning Thu, Dec 4, priced at $417 just found

Find the cheapest month to fly from New York (EWR) to Ontario (ONT)

September is typically the cheapest month to fly

From $243 - $419 per traveler.

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to John Wayne SNA. Cheapest option available. Average driving time to city center is 42 minutes. Flights from $339
SNA
John Wayne
Cheapest
Average driving time to city center42 min
Flights from $339
Select flight to San Bernardino Intl. SBD. Average driving time to city center is 32 minutes. Flights from $1,068
SBD
San Bernardino Intl.
Average driving time to city center32 min
Flights from $1,068

Frequently asked questions

How much does a flight from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Grab a cheap one-way flight from $142 or cheap return flight from $217 from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT)?
Flying in February is a good way to save, as it's the cheapest month for flights between EWR and ONT. You'll typically find the lowest prices during off-peak months.
What is the cheapest airline that flies from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll take you from EWR to ONT. Then, sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT)?
There are no daily direct flights from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds before you know it.
What day of the week has the most flights from EWR to ONT?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT)?
To avoid potential delays on the Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT) route, aim to fly before 3 PM. Flights after this time have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Ontario from Liberty Intl. Airport (EWR)?
Board a direct flight from Liberty Intl. Airport (EWR) to Ontario and land at Los Angeles Intl. Airport (LAX). Another convenient entry point into the city is John Wayne Airport (SNA).
Is it cheaper to buy a plane ticket from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Booking your flight from EWR to ONT just before your journey is typically more expensive. But if you're flexible with your departure dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book an EWR to ONT flight and hotel package?
Compared with arranging flights and hotels separately, booking an EWR to ONT flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one place will take the hassle out of planning your trip. Simply secure your flights and choose from our extensive range of hotels, then customize your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT)?
In most cases, you're able to cancel or reschedule your EWR to ONT flight. However, there may be additional fees, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you'd like further details, visit our Customer Service portal.

Travel information

Origin airport
Newark Liberty Intl. Airport
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Roundtrip price
$216
Distance
2402 mi

Book with confidence

Newark Liberty Intl. Airport to Ontario Flights

The cheapest times to fly from Newark Liberty Intl. Airport to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Newark Liberty Intl. Airport to Ontario are during the month of February. You can find some of the cheapest flights from Newark Liberty Intl. Airport to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Newark Liberty Intl. Airport to Ontario

Sunday is one of the best days to book for cheap flights from Newark Liberty Intl. Airport to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Newark Liberty Intl. Airport to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Newark Liberty Intl. Airport to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $142 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Newark Liberty Intl. Airport to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Newark Liberty Intl. Airport to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Newark Liberty Intl. Airport to Ontario Flights

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*Available to One Key members.