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$120+ 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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
EWR — ONT
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
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Find cheap flights from Newark to Ontario with Cheapflights

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Cheapflights Tip: The best prices from Newark to Ontario are usually found in September or March, booked 43 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 April 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$262
(Alaska Airlines)

One-way from

$120
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$465
Provider with most accurate pricing for Newark-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Newark-Ontario flights.
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From Newark to Ontario
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One-way flight from Newark to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This Alaska Airlines deal was found by Cheapflights users on 4/28. 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.
Tue 9/167:19 amEWR - ONT
1 stop9h 50mAlaska Airlines
Tue 9/233:04 pmONT - EWR
1 stop11h 55mAlaska Airlines
Deal found 4/28$262
This Delta deal was found by Cheapflights users on 4/27. 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.
Sat 9/67:00 amEWR - ONT
1 stop8h 23mDelta
Mon 9/810:59 pmONT - EWR
1 stop7h 37mDelta
Deal found 4/27$287
This American Airlines deal was found by Cheapflights users on 4/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/291:42 pmEWR - ONT
2 stops11h 15mAmerican Airlines
Tue 6/1011:59 pmONT - EWR
2 stops9h 31mAmerican Airlines
Deal found 4/28$297
This United Airlines deal was found by Cheapflights users on 4/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/106:00 amEWR - ONT
1 stop9h 38mUnited Airlines
Tue 5/201:45 pmONT - EWR
1 stop8h 13mUnited Airlines
Deal found 4/28$308
This Hawaiian Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 5/75:30 pmEWR - ONT
1 stop9h 28mHawaiian Airlines
Sat 5/244:45 pmONT - EWR
1 stop10h 14mHawaiian Airlines
Deal found 4/29$344

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 April 29, 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

Tue 5/13

5:30 pm-11:58 pm

1 stop9h 28m

Ontario

Tue 6/3

4:45 pm-5:59 am

1 stop10h 14m

$277

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 5/21

6:00 am-11:08 am

1 stop8h 08m

Ontario

Sat 5/24

1:10 pm-12:10 am

1 stop8h 00m

$287

NewarkOntario

EWR - ONT

EWRONT

Newark

Thu 5/29

1:42 pm-9:57 pm

2 stops11h 15m

Ontario

Tue 6/10

11:59 pm-12:30 pm

2 stops9h 31m

$297

NewarkOntario

EWR - ONT

EWRONT

Newark

Sat 5/10

6:00 am-12:38 pm

1 stop9h 38m

Ontario

Tue 5/20

1:45 pm-12:58 am

1 stop8h 13m

$308

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 5/7

5:30 pm-11:58 pm

1 stop9h 28m

Ontario

Sat 5/24

4:45 pm-5:59 am

1 stop10h 14m

$344

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 6/4

7:00 am-8:51 pm

1 stop16h 51m

$120

NewarkOntario

EWR - ONT

EWRONT

Newark

Tue 5/13

5:30 pm-11:58 pm

1 stop9h 28m

$137

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 5/21

6:00 am-11:08 am

1 stop8h 08m

$144

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 6/25

6:56 am-12:00 pm

1 stop8h 04m

$180

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 5/28

3:55 pm-10:45 pm

1 stop9h 50m

$194

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 11 results
1
2

Compare providers for flights from Newark to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Newark to Ontario in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Newark Airport-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Newark Airport-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Newark Airport-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Newark Airport-Ontario flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Newark Airport-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 April 25, 2025.

The best time to book flights from Newark Airport to Ontario is 43 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 April 29, 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 April 29, 2025.
Read through reviews of airlines operating flights from New York to Ontario, such as Alaska Airlines, Delta and Hawaiian Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,961 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

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
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

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
7,929 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,402 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

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
9,961 reviews

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Entertainment

7.1

Food

7.1

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 ($262), Delta ($282), and American Airlines ($297) offers the cheapest pricing from Newark Airport to Ontario. Alaska Airlines is priced at 41% 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 Alaska Airlines ($136), Delta ($144), and American Airlines ($176).

  • 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$161Average$234FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$262Average$499FlexibilityNo cancel feeOn-time69%
DeltaCheapest$277Average$393FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$277Average$431FlexibilityNo cancel feeOn-time71%

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