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$108+ Cheap flights from Newark (EWR) to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
EWR — ONT
ago. 2 — ago. 91
sáb. 8/2
sáb. 8/9
1 adult, Economy
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Cheapflights Tip: The best prices from Newark to Ontario are usually found in September or March, booked 69 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Newark to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Newark (EWR) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated julio 28, 2025.

Round-trip from

$227
(Trip.com)

One-way from

$108
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$367
From Newark to Ontario
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One-way flight from Newark to Ontario
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Highest demand for flights based on searches. 13% potential increase in price ($64 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Newark to Ontario

Cheapest flights from Newark to Ontario
Explore the most affordable flight options available from Newark to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 28, 2025.

This Trip.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/156:59 amEWR - ONT
1 stop10h 01mMultiple Airlines
lun. 9/222:45 pmONT - EWR
1 stop12h 09mMultiple Airlines
Deal found 7/26$227
This Alaska Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/155:48 pmEWR - ONT
1 stop9h 06mAlaska Airlines
lun. 9/223:06 pmONT - EWR
1 stop11h 53mAlaska Airlines
Deal found 7/28$267
This American Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/307:15 amEWR - ONT
1 stop7h 17mAmerican Airlines
sáb. 9/68:15 amONT - EWR
1 stop7h 17mAmerican Airlines
Deal found 7/27$269
This Delta deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/46:00 amEWR - ONT
1 stop7h 35mDelta
mié. 9/107:05 amONT - EWR
1 stop7h 55mDelta
Deal found 7/27$277
This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 8/196:05 amEWR - ONT
1 stop9h 27mUnited Airlines
sáb. 8/236:04 amONT - EWR
1 stop7h 35mUnited Airlines
Deal found 7/26$298
This Hawaiian Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/225:45 pmEWR - ONT
1 stop9h 06mHawaiian Airlines
dom. 10/267:20 amONT - EWR
1 stop8h 35mHawaiian Airlines
Deal found 7/26$308

Cheapflights Fare Finder

 
Customize your flight search to find flights from Newark to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated julio 28, 2025.
Use the filters below to find and compare flights from Newark Airport to Ontario that are best for you.

Fly from

Newark

Fly to

Ontario

Route

Depart

Return

Price

NewarkOntario

EWR - ONT

EWRONT

Newark

lun. 9/15

6:59 am-2:00 pm

1 stop10h 01m

Ontario

lun. 9/22

2:45 pm-5:54 am

1 stop12h 09m

$227

NewarkOntario

EWR - ONT

EWRONT

Newark

lun. 9/15

5:48 pm-11:54 pm

1 stop9h 06m

Ontario

lun. 9/22

3:06 pm-5:59 am

1 stop11h 53m

$267

NewarkOntario

EWR - ONT

EWRONT

Newark

sáb. 8/30

7:15 am-11:32 am

1 stop7h 17m

Ontario

sáb. 9/6

6:10 am-4:29 pm

1 stop7h 19m

$269

NewarkOntario

EWR - ONT

EWRONT

Newark

jue. 9/4

6:00 am-10:35 am

1 stop7h 35m

Ontario

mié. 9/10

7:05 am-6:00 pm

1 stop7h 55m

$277

NewarkOntario

EWR - ONT

EWRONT

Newark

mar. 8/19

6:05 am-12:32 pm

1 stop9h 27m

Ontario

sáb. 8/23

6:04 am-4:39 pm

1 stop7h 35m

$298

NewarkOntario

EWR - ONT

EWRONT

Newark

mié. 10/22

5:45 pm-11:51 pm

1 stop9h 06m

Ontario

dom. 10/26

7:20 am-6:55 pm

1 stop8h 35m

$308

NewarkOntario

EWR - ONT

EWRONT

Newark

mar. 9/23

6:59 am-9:56 pm

1 stop17h 57m

$108

NewarkOntario

EWR - ONT

EWRONT

Newark

mar. 9/9

7:19 am-2:12 pm

1 stop9h 53m

$125

NewarkOntario

EWR - ONT

EWRONT

Newark

lun. 9/22

5:30 pm-12:03 am

1 stop9h 33m

$134

NewarkOntario

EWR - ONT

EWRONT

Newark

mar. 8/19

6:00 am-10:35 am

1 stop7h 35m

$139

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Showing 1-10 of 13 results
1
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Best time to book a flight from Newark to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Newark with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Newark Airport to Ontario

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

Use this chart to determine the optimal time to book a round-trip flight from Newark to Ontario. Price data was last updated on July 25, 2025.

The best time to book flights from Newark Airport to Ontario is 69 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Newark Airport to Ontario?

Currently, August is the cheapest month in which you can book a flight from Newark Airport to Ontario (average of $246). Flying from Newark Airport to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from EWR to ONT?

Find hourly flight availability from Newark to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 28, 2025.

It’s optimal to fly from Newark Airport to Ontario in the evening. By choosing this option you can save up to 39% on the cost of your flight, compared to a flight in the afternoon.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated julio 28, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and Hawaiian Airlines from Newark Airport to Ontario by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,975 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,604 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,892 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Newark to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Newark?

    Ontario (ONT) is the airport you will fly into if you book a flight from Newark to Ontario. You should not have trouble finding flights to Ontario from Newark; the airport handles an average of 0 inbound flights from Newark per day. You should also have plenty of airline options to choose from since 4 airlines have flights to the Ontario airport from Newark. It is only a 3.1 mi journey from Ontario (ONT) to Ontario’s city center.

  • What are the cheapest airlines flying from Newark Airport to Ontario round-trip?

    According to our current data, Alaska Airlines ($267), American Airlines ($269), and Delta ($277) offers the cheapest pricing from Newark Airport to Ontario. Alaska Airlines is priced at 35% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Newark Airport to Ontario one-way?

    The cheapest airlines for a one-way flight from Newark Airport to Ontario are Hawaiian Airlines ($125), Delta ($139), and American Airlines ($142).

  • Can I find deals for flights from Newark to Ontario that include hotel bookings?

    Yes. In addition to deals on Newark to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Newark to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Newark to Ontario.

  • Can I find deals for business class flights from Newark to Ontario?

    Yes. Cheapflights offers flight deals from Newark to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Newark Airport to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Newark Airport to Ontario (average of $246). Flying from Newark Airport to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Newark to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Newark to Ontario

Discover the top 4 airlines that operate flights from Newark to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated julio 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$116Average$224FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$276Average$415FlexibilityNo cancel feeOn-time71%
DeltaCheapest$280Average$374FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$280Average$462FlexibilityNo cancel feeOn-time69%

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