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$111+ 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 6/25. Fares are subject to change and may not be available on all flights or dates of travel.
EWR — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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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 June 12, 2025.

Round-trip from

$267
(United Airlines)

One-way from

$111
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$508
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. 10% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/10. 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.
Fri 7/411:55 amEWR - ONT
1 stop8h 45mUnited Airlines
Mon 7/76:28 pmONT - EWR
1 stop8h 08mUnited Airlines
Deal found 6/10$267
This American Airlines deal was found by Cheapflights users on 6/12. 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.
Wed 7/235:29 amEWR - ONT
1 stop7h 32mAmerican Airlines
Wed 7/307:05 pmONT - EWR
2 stops11h 49mAmerican Airlines
Deal found 6/12$272
This Trip.com deal was found by Cheapflights users on 6/12. 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.
Wed 7/26:53 amEWR - ONT
1 stop14h 45mMultiple Airlines
Wed 7/97:00 amONT - EWR
1 stop20h 05mMultiple Airlines
Deal found 6/12$274
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 6/10$277
This Delta deal was found by Cheapflights users on 6/10. 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 9/201:15 pmEWR - ONT
1 stop9h 27mDelta
Wed 9/2412:00 pmONT - EWR
1 stop8h 00mDelta
Deal found 6/10$282
This Frontier deal was found by Cheapflights users on 6/9. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/811:04 amEWR - ONT
2 stops15h 46mFrontier
Tue 7/155:21 pmONT - EWR
2 stops13h 48mFrontier
Deal found 6/9$419

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 June 12, 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

Fri 7/4

11:55 am-5:40 pm

1 stop8h 45m

Ontario

Mon 7/7

6:28 pm-5:36 am

1 stop8h 08m

$267

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 7/23

5:29 am-10:01 am

1 stop7h 32m

Ontario

Wed 7/30

7:05 pm-9:54 am

2 stops11h 49m

$272

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 7/2

6:53 am-6:38 pm

1 stop14h 45m

Ontario

Wed 7/9

7:00 am-6:05 am

1 stop20h 05m

$274

NewarkOntario

EWR - ONT

EWRONT

Newark

Tue 9/16

7:19 am-2:09 pm

1 stop9h 50m

Ontario

Tue 9/23

3:04 pm-5:59 am

1 stop11h 55m

$277

NewarkOntario

EWR - ONT

EWRONT

Newark

Sat 9/20

1:15 pm-7:42 pm

1 stop9h 27m

Ontario

Wed 9/24

12:00 pm-11:00 pm

1 stop8h 00m

$282

NewarkOntario

EWR - ONT

EWRONT

Newark

Tue 7/8

11:04 am-11:50 pm

2 stops15h 46m

Ontario

Tue 7/15

5:21 pm-10:09 am

2 stops13h 48m

$419

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 6/25

6:53 am-9:51 pm

1 stop17h 58m

$111

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 10/8

4:29 pm-11:59 pm

1 stop10h 30m

$128

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 7/23

5:29 am-10:01 am

1 stop7h 32m

$134

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 9/24

7:19 am-2:09 pm

1 stop9h 50m

$135

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 12 results
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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 June 9, 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 June 12, 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 June 12, 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
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

7.1

Boarding

8.1

Crew

8.5

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, United Airlines ($267), American Airlines ($272), and Alaska Airlines ($277) offers the cheapest pricing from Newark Airport to Ontario. United Airlines is priced at 38% 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 ($128), American Airlines ($134), and Alaska Airlines ($135).

  • 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$143Average$224FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$276Average$432FlexibilityNo cancel feeOn-time71%
DeltaCheapest$276Average$374FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$280Average$485FlexibilityNo cancel feeOn-time69%

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