Cheap flights from Newark Airport to Los Angeles from $138

1 adult
1 adult, Economy, 0 bags

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Cheap round-trip flights

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Frontier Logo
10:26 pm - 10:17 pmEWR  Newark-ONT Ontario
26h 51m2 stops Atlanta Hartsfield-Jackson Denver Intl
Frontier Logo
8:44 am - 12:29 amONT  Ontario-EWR Newark
12h 45m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson
$308Frontier
Fri, Dec 11 - Tue, Dec 15
Frontier Logo
6:00 am - 10:17 pmEWR  Newark-ONT Ontario
19h 17m2 stops Atlanta Hartsfield-Jackson Denver Intl
Frontier Logo
8:44 am - 12:29 amONT  Ontario-EWR Newark
12h 45m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson
$321Frontier
Wed, Dec 9 - Wed, Dec 16
United Airlines Logo
3:45 pm - 9:00 pmEWR  Newark-ONT Ontario
8h 15m1 stop Denver Intl
United Airlines Logo
6:00 am - 6:09 pmONT  Ontario-EWR Newark
9h 09m1 stop Houston George Bush Intcntl
$399United Airlines
Sat, Jan 16 - Sun, Jan 24
Alaska Airlines Logo
7:00 am - 4:05 pmEWR  Newark-ONT Ontario
12h 05m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:00 am - 11:59 pmONT  Ontario-EWR Newark
14h 59m1 stop Seattle/Tacoma Intl
$399Alaska Airlines
Thu, Dec 3 - Wed, Dec 9
Alaska Airlines Logo
9:00 am - 4:05 pmEWR  Newark-ONT Ontario
10h 05m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:29 pm - 6:53 amONT  Ontario-EWR Newark
11h 24m1 stop Seattle/Tacoma Intl
$399Alaska Airlines
Tue, Dec 8 - Tue, Jan 12
American Airlines Logo
6:13 am - 12:39 pmEWR  Newark-ONT Ontario
9h 26m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
10:32 am - 11:00 pmONT  Ontario-EWR Newark
9h 28m1 stop Dallas/Fort Worth
$409American Airlines
Thu, Dec 10 - Sun, Dec 13
American Airlines Logo
12:29 pm - 6:37 pmEWR  Newark-ONT Ontario
9h 08m1 stop Dallas/Fort Worth
American Airlines Logo
11:59 pm - 11:30 amONT  Ontario-EWR Newark
8h 31m1 stop Dallas/Fort Worth
$409American Airlines
Thu, Apr 15 - Mon, Apr 19
United Airlines Logo
1:45 pm - 9:11 pmEWR  Newark-ONT Ontario
10h 26m1 stop Denver Intl
United Airlines Logo
1:42 pm - 11:44 pmONT  Ontario-EWR Newark
7h 02m1 stop Denver Intl
$409United Airlines
Tue, Dec 15 - Tue, Jan 5
Delta Logo
6:50 am - 12:20 pmEWR  Newark-ONT Ontario
8h 30m1 stop Salt Lake City
Delta Logo
11:08 pm - 9:30 amONT  Ontario-EWR Newark
7h 22m1 stop Atlanta Hartsfield-Jackson
$409Delta
Thu, Nov 26 - Mon, Dec 7
Delta Logo
6:50 am - 12:20 pmEWR  Newark-ONT Ontario
8h 30m1 stop Salt Lake City
Delta Logo
12:20 pm - 12:57 amONT  Ontario-EWR Newark
9h 37m1 stop Atlanta Hartsfield-Jackson
$409Delta
Thu, Nov 26 - Wed, Dec 9

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Frontier flights from Newark Airport to Ontario

Our best Frontier deals on Newark Airport to Ontario flight tickets
Frontier
Dec 11
EWR10:26 pmNewark
26h 51m
2 stops
ONT10:17 pmOntario
Dec 15
ONT8:44 amOntario
12h 45m
2 stops
EWR12:29 amNewark
$308
Frontier
Dec 9
EWR6:00 amNewark
19h 17m
2 stops
ONT10:17 pmOntario
Dec 16
ONT8:44 amOntario
12h 45m
2 stops
EWR12:29 amNewark
$321
Frontier
Dec 9
EWR6:00 amNewark
19h 17m
2 stops
ONT10:17 pmOntario
Dec 16
ONT8:44 amOntario
12h 45m
2 stops
EWR12:29 amNewark
$323

Alaska Airlines flights from Newark Airport to Ontario

Our best Alaska Airlines deals on Newark Airport to Ontario flight tickets
Alaska Airlines
Jan 20
EWR9:00 amNewark
9h 33m
1 stop
ONT3:33 pmOntario
Jan 24
ONT10:57 amOntario
25h 25m
1 stop
EWR3:22 pmNewark
$407
Alaska Airlines
Nov 21
EWR5:41 pmNewark
20h 30m
1 stop
ONT11:11 amOntario
Dec 7
ONT6:00 amOntario
14h 59m
1 stop
EWR11:59 pmNewark
$506
Alaska Airlines
Nov 19
EWR7:00 amNewark
11h 13m
1 stop
ONT3:13 pmOntario
Dec 7
ONT5:01 pmOntario
10h 47m
1 stop
EWR6:48 amNewark
$514

momondo Fare Finder

 
Use the filters below to find and compare flights from Newark Airport to Ontario that are best for you.

Fly from

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Route

Depart

Return

Price

Cheapest round-trip

NewarkOntario

EWR Newark - ONT Ontario

EWRONT

Newark

Fri 12/11

10:26 pm-10:17 pm

2 stops26h 51m

Ontario

Tue 12/15

8:44 am-12:29 am

2 stops12h 45m

$308

NewarkOntario

EWR Newark - ONT Ontario

EWRONT

Newark

Wed 12/9

6:00 am-10:17 pm

2 stops19h 17m

Ontario

Wed 12/16

8:44 am-12:29 am

2 stops12h 45m

$321

NewarkOntario

EWR Newark - ONT Ontario

EWRONT

Newark

Sat 1/16

3:45 pm-9:00 pm

1 stop8h 15m

Ontario

Sun 1/24

6:00 am-6:09 pm

1 stop9h 09m

$399

NewarkOntario

EWR Newark - ONT Ontario

EWRONT

Newark

Thu 12/3

7:00 am-4:05 pm

1 stop12h 05m

Ontario

Wed 12/9

6:00 am-11:59 pm

1 stop14h 59m

$399

NewarkOntario

EWR Newark - ONT Ontario

EWRONT

Newark

Tue 12/8

9:00 am-4:05 pm

1 stop10h 05m

Ontario

Tue 1/12

4:29 pm-6:53 am

1 stop11h 24m

$399

NewarkOntario

EWR Newark - ONT Ontario

EWRONT

Newark

Thu 12/10

6:13 am-12:39 pm

1 stop9h 26m

Ontario

Sun 12/13

10:32 am-11:00 pm

1 stop9h 28m

$409

NewarkOntario

EWR Newark - ONT Ontario

EWRONT

Newark

Thu 4/15

12:29 pm-6:37 pm

1 stop9h 08m

Ontario

Mon 4/19

11:59 pm-11:30 am

1 stop8h 31m

$409

NewarkOntario

EWR Newark - ONT Ontario

EWRONT

Newark

Tue 12/15

1:45 pm-9:11 pm

1 stop10h 26m

Ontario

Tue 1/5

1:42 pm-11:44 pm

1 stop7h 02m

$409
Quickest round-trip

NewarkOntario

EWR Newark - ONT Ontario

EWRONT

Newark

Thu 11/26

6:50 am-12:20 pm

1 stop8h 30m

Ontario

Mon 12/7

11:08 pm-9:30 am

1 stop7h 22m

$409

NewarkOntario

EWR Newark - ONT Ontario

EWRONT

Newark

Thu 11/26

6:50 am-12:20 pm

1 stop8h 30m

Ontario

Wed 12/9

12:20 pm-12:57 am

1 stop9h 37m

$409

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Los Angeles from

How to get the cheapest flight ticket from Newark Airport to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Newark Airport and Ontario?

Prices are currently low for flights on this route.

Typical prices usually range from $378 to $473.
The lowest price recently found on this route was $308.

What is the cheapest month to fly to Ontario?

In general, January is the cheapest month to fly from Newark Airport to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $384. If you aren’t able to travel during the month of January, then book flights to Ontario from Newark Airport during May instead. Flights to Ontario in May, while not as cheap as those in January, still average around $391.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as $347. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Newark Airport to Ontario for around $596.

What is the cheapest time of day to depart on your flight to Ontario?

In the evening is the cheapest time of day to fly from Newark Airport to Ontario when you can find flight prices for as low as $364. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $455 on average. Flights to Ontario from Newark Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to Ontario from Newark Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $486 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Newark Airport for as low as $401 on momondo.

How have Newark Airport to Ontario flight prices changed over time?

As of November 2026, prices for Newark Airport to Ontario flights are approximately 10% more expensive when compared to flights at the same time last year.

When to book flights from Newark Airport to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Newark Airport to Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Newark Airport to Ontario (EWR to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Newark Airport to Ontario

Best Price Found

$138

Fastest flight time

8h 27m

Direct flights

None
The best one-way flight to Ontario from Newark Airport in the past 72 hours is $138. The best round-trip flight deal from Newark Airport to Ontario found on momondo in the last 72 hours is $308.
The fastest flight from Newark Airport to Ontario takes 8h 27m
There are no direct flights from Newark Airport to Ontario. There are no popular flight routes from Newark Airport to Ontario.

Frequently asked questions about flying from Newark Airport to Ontario

  • How far is Newark to Ontario by plane?

    The distance between Newark and Ontario is about 2403.8 mi. A reasonable flight in good conditions will take 8h 27m.

  • When did momondo last update prices for flights from Newark Airport to Ontario Airport?

    Prices for flights from Newark Airport to Ontario Airport were last updated today.

  • How many operators does momondo search for flights from Newark Airport to Ontario Airport?

  • How old do you have to be to fly from Newark Airport to Ontario Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Newark Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Newark Airport to Ontario?

Best airlines flying from Newark Airport to Ontario

Compare and see reviews for airlines that fly from Newark Airport to Ontario with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $286Free CancellationRating
7.0
12,228 reviews
Search American Airlines flights
United AirlinesPriceFrom $338Free CancellationRating
7.3
10,471 reviews
Search United Airlines flights
DeltaPriceFrom $348Free CancellationRating
7.8
8,699 reviews
Search Delta flights
Alaska AirlinesPriceFrom $378Free CancellationRating
7.9
13,159 reviews
Search Alaska Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from New York to Ontario?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from New York.

Can I find flights from New York to Ontario with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Ontario from New York with this policy.

How can momondo help me find flights from New York to Ontario?

Once you have performed a search for New York to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from New York to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario from New York. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Ontario trip

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1 adult
Wed 12/9
Wed 12/16

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