$126 Cheap Frontier Airlines flights Newark Liberty Intl. Airport (EWR) to Ontario (ONT)

View $126 flight on Thu, Oct 30, 2025Opens in a new window

$126 Cheap Frontier Airlines flights Newark Liberty Intl. Airport (EWR) to Ontario (ONT)

Prices were available within the past 7 days and start at $126 for one-way flights and $240 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Oct 30 - Sat, Nov 8
EWR
New York
ONT
Ontario
$240 Roundtrip, just found
$240
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 30 from New York to Ontario, returning Sat, Nov 8, priced at $240 just found
Frontier Airlines
Thu, Oct 30 - Mon, Nov 3
EWR
New York
ONT
Ontario
$247 Roundtrip, found 1 day ago
$247
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Oct 30 from New York to Ontario, returning Mon, Nov 3, priced at $247 found 1 day ago
Frontier Airlines
Thu, Oct 30 - Sat, Nov 8
EWR
New York
ONT
Ontario
$248 Roundtrip, just found
$248
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Oct 30 from New York to Ontario, returning Sat, Nov 8, priced at $248 just found
Frontier Airlines
Thu, Oct 30 - Tue, Nov 11
EWR
New York
ONT
Ontario
$251 Roundtrip, found 21 hours ago
$251
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Thu, Oct 30 from New York to Ontario, returning Tue, Nov 11, priced at $251 found 21 hours ago
Frontier Airlines
Fri, Sep 5 - Thu, Sep 11
EWR
New York
ONT
Ontario
$255 Roundtrip, found 20 hours ago
$255
Roundtrip
found 20 hours ago
Select Frontier Airlines flight, departing Fri, Sep 5 from New York to Ontario, returning Thu, Sep 11, priced at $255 found 20 hours ago
Frontier Airlines
Thu, Oct 23 - Wed, Oct 29
EWR
New York
ONT
Ontario
$259 Roundtrip, found 17 hours ago
$259
Roundtrip
found 17 hours ago
Select Frontier Airlines flight, departing Thu, Oct 23 from New York to Ontario, returning Wed, Oct 29, priced at $259 found 17 hours ago
Flights from Newark Liberty Intl. Airport (EWR) to Ontario (ONT)
Origin airport
Newark Liberty Intl. Airport
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, United
Popular airline
American Airlines
Distance
2402 mi
Average flight time
9 hours 41 mins

Frequently asked questions

How much is a Frontier Airlines flight from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT)?
Set the "Price (lowest to highest)" filter on Expedia to look for cheap Frontier Airlines round-trip flights from $240 from EWR to ONT. Affordable one-way tickets from $126 are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from EWR to ONT with Frontier Airlines?
January is one of the least expensive months to travel to Ontario with Frontier Airlines. You could also find excellent prices on one-way and return tickets in April.
What is the cheapest time to book flights from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT) with Frontier Airlines?
Begin your search one to three months ahead of your travel date to find cheap fares on Frontier Airlines flights from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic trips.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Frontier Airlines fly nonstop from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT)?
Select our "Nonstop" filter when searching for direct Frontier Airlines flights from EWR to ONT. You can also compare other carriers offering the same nonstop journey.
What is the earliest Frontier Airlines flight from EWR to ONT?
To find the earliest departures from EWR to ONT with Frontier Airlines, sort your results by "Morning" and "Early Morning." Booking an early flight usually means you're less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Frontier Airlines fly into in Ontario?
Frontier Airlines flights from Liberty Intl. Airport (EWR) to Ontario come in to land at Los Angeles - Ontario Intl. Airport (ONT). This is the main entry point to this destination.
Why fly with Frontier Airlines from EWR to ONT?
Offering a rewarding loyalty program, Frontier Airlines is a top choice for many passengers departing from EWR to ONT. Plus, as a Frontier Miles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Frontier Airlines flight from Liberty Intl. Airport (EWR) to Los Angeles - Ontario Intl. Airport (ONT)?
Depending on the ticket type you purchased, a fee will generally apply if you change or cancel your flight more than 24 hours after it has been confirmed. To secure plane tickets with more flexibility, select our "Changes included" or "No cancel fee" filter when searching for flights. For additional information on changing or canceling your reservation, head to "Trips," select your flight and click on "Manage Booking."

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*Available to One Key members.