Which airline has the best punctuality record on Newark to Ontario flights?

Over the last year, Alaska Airlines have had the lowest number of delays on this route, with just 100% of flights being delayed.

What is the most punctual flight time for Newark to Ontario flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.

How often are flights from Newark to Ontario delayed?

About 21% of weekly flights between Newark and Ontario have experienced delays in the past year, with the average delay time being 134 minutes.

How long is the flight from Newark Airport to Ontario?

For as low as $326, Delta can have you in Ontario from Newark Airport in 8h 15m. The distance from Newark Airport to Ontario is about 2401 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

According to our current data, Spirit Airlines ($116), United Airlines ($267), and American Airlines ($276) offers the cheapest pricing from Newark Airport to Ontario. Spirit Airlines is priced at 71% lower than the current average price of a flight leaving 3 months from now.

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.

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).

What are the most popular airlines that fly from Newark Airport to Ontario?

American Airlines, United Airlines and Delta are the most popular airlines when flying from Newark Airport to Ontario.

Most accurate provider : When it comes to deals on Newark Airport-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Newark Airport-Ontario flight deals on Cheapflights vs. eDreams >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.

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.

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.

$100+ Cheap Flights from Newark Airport to Ontario

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Newark to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Newark to Ontario are usually found in September or August, booked 38 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

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 October 27, 2025.

Sat 11/811:30 amEWR - ONT

2 stops21h 52mMultiple Airlines

Mon 11/171:46 pmONT - EWR

1 stop16h 48mMultiple Airlines

Deal found 10/25

$254

Sun 11/165:59 pmEWR - ONT

1 stop16h 18mMultiple Airlines

Wed 11/198:45 amONT - EWR

2 stops12h 49mMultiple Airlines

Deal found 10/26

$268

Thu 11/1310:30 pmEWR - ONT

2 stops23h 19mMultiple Airlines

Sun 11/164:15 pmONT - EWR

1 stop15h 38mMultiple Airlines

Deal found 10/25

$276

Wed 12/103:58 pmEWR - ONT

1 stop29h 37mMultiple Airlines

Wed 12/176:15 amONT - EWR

2 stops38h 44mMultiple Airlines

Deal found 10/26

$279

Mon 11/105:58 pmEWR - ONT

1 stop29h 44mMultiple Airlines

Fri 11/141:46 pmONT - EWR

1 stop16h 48mMultiple Airlines

Deal found 10/26

$281

Mon 11/105:58 pmEWR - ONT

1 stop29h 44mMultiple Airlines

Mon 11/174:05 pmONT - EWR

2 stops15h 25mMultiple Airlines

Deal found 10/26

$290

Thu 11/206:00 amEWR - ONT

1 stop8h 06mDelta

Thu 11/276:00 amONT - EWR

1 stop8h 41mDelta

Deal found 10/25

$300

Thu 11/134:25 pmEWR - ONT

1 stop10h 07mAlaska Airlines

Tue 11/186:00 amONT - EWR

1 stop9h 29mAlaska Airlines

Deal found 10/24

$315

Best flights from Newark to Ontario
Discover carefully curated flight deals from Newark to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 27, 2025.

Mon 11/105:49 pmEWR - ONT

1 stop8h 15mDelta

Mon 11/1710:25 pmONT - EWR

2 stops10h 39mDelta

Deal found 10/26

$326

Wed 11/124:25 pmEWR - ONT

1 stop21h 40mAlaska Airlines

Sat 12/67:10 amONT - EWR

1 stop8h 49mAlaska Airlines

Deal found 10/26

$327

Thu 12/116:00 amEWR - ONT

1 stop9h 18mUnited Airlines

Wed 12/175:05 amONT - EWR

1 stop7h 42mUnited Airlines

Deal found 10/25

$333

Sat 11/157:30 amEWR - ONT

1 stop10h 47mAlaska Airlines

Sat 12/66:00 amONT - EWR

1 stop9h 26mAlaska Airlines

Deal found 10/26

$327

Fri 12/57:00 pmEWR - ONT

1 stop7h 58mDelta

Mon 12/84:49 pmONT - EWR

2 stops13h 50mDelta

Deal found 10/25

$338

Tue 2/243:45 pmEWR - ONT

1 stop9h 52mAlaska Airlines

Wed 3/46:00 amONT - EWR

1 stop10h 02mAlaska Airlines

Deal found 10/26

$332

Wed 2/253:45 pmEWR - ONT

1 stop9h 52mAlaska Airlines

Thu 3/56:00 amONT - EWR

1 stop10h 02mAlaska Airlines

Deal found 10/26

$332

Thu 2/263:45 pmEWR - ONT

1 stop9h 52mAlaska Airlines

Wed 3/46:00 amONT - EWR

1 stop10h 02mAlaska Airlines

Deal found 10/26

$332

Fri 1/234:36 pmEWR - ONT

1 stop10h 20mAlaska Airlines

Fri 1/306:00 amONT - EWR

1 stop9h 29mAlaska Airlines

Deal found 10/24

$332

Wed 2/253:45 pmEWR - ONT

1 stop9h 52mAlaska Airlines

Wed 3/46:00 amONT - EWR

1 stop10h 02mAlaska Airlines

Deal found 10/26

$332

Thu 2/263:45 pmEWR - ONT

1 stop9h 52mAlaska Airlines

Tue 3/106:00 amONT - EWR

1 stop10h 02mAlaska Airlines

Deal found 10/26

$332

Last-minute flights from Newark to Ontario
Discover last-minute flight deals from Newark to Ontario. Data last updated October 27, 2025 and is based on user searches.

Sat 11/811:30 amEWR - ONT

2 stops21h 52mMultiple Airlines

Mon 11/171:46 pmONT - EWR

1 stop16h 48mMultiple Airlines

Deal found 10/25

$254

Mon 11/105:58 pmEWR - ONT

1 stop29h 44mMultiple Airlines

Fri 11/141:46 pmONT - EWR

1 stop16h 48mMultiple Airlines

Deal found 10/26

$281

Mon 11/105:58 pmEWR - ONT

1 stop29h 44mMultiple Airlines

Mon 11/174:05 pmONT - EWR

2 stops15h 25mMultiple Airlines

Deal found 10/26

$290

Thu 11/1310:30 pmEWR - ONT

2 stops23h 19mMultiple Airlines

Sun 11/164:15 pmONT - EWR

1 stop15h 38mMultiple Airlines

Deal found 10/25

$276

Thu 11/134:25 pmEWR - ONT

1 stop10h 07mAlaska Airlines

Tue 11/186:00 amONT - EWR

1 stop9h 29mAlaska Airlines

Deal found 10/24

$315

Thu 11/134:25 pmEWR - ONT

1 stop10h 07mAlaska Airlines

Mon 11/176:00 amONT - EWR

1 stop9h 29mAlaska Airlines

Deal found 10/26

$317

Sat 11/157:30 amEWR - ONT

1 stop10h 47mAlaska Airlines

Mon 11/177:20 amONT - EWR

1 stop8h 35mAlaska Airlines

Deal found 10/25

$318

Sun 11/165:59 pmEWR - ONT

1 stop16h 18mMultiple Airlines

Wed 11/198:45 amONT - EWR

2 stops12h 49mMultiple Airlines

Deal found 10/26

$268

Thu 11/206:00 amEWR - ONT

1 stop8h 06mDelta

Thu 11/276:00 amONT - EWR

1 stop8h 41mDelta

Deal found 10/25

$300

One-way flights from Newark to Ontario
Search for one-way flight options from Newark to Ontario. Find affordable one-way fares based on user searches. Data last updated October 27, 2025.

Thu 12/115:59 amEWR - ONT

2 stops37h 34mFrontier

Deal found 10/25

$100

Wed 11/126:45 pmEWR - ONT

2 stops31h 55mMultiple Airlines

Deal found 10/27

$103

Tue 11/116:45 pmEWR - ONT

2 stops29h 44mMultiple Airlines

Deal found 10/27

$109

Sat 11/1511:30 amEWR - ONT

2 stops21h 57mFrontier

Deal found 10/26

$114

Sat 11/811:30 amEWR - ONT

2 stops21h 52mFrontier

Deal found 10/25

$115

Mon 11/176:45 pmEWR - ONT

2 stops29h 42mMultiple Airlines

Deal found 10/26

$118

Fri 11/146:45 pmEWR - ONT

2 stops19h 25mMultiple Airlines

Deal found 10/25

$124

Sat 11/156:18 pmEWR - ONT

1 stop15h 59mMultiple Airlines

Deal found 10/26

$131

Mon 11/105:58 pmEWR - ONT

1 stop29h 44mMultiple Airlines

Deal found 10/25

$138

Fri 11/76:45 pmEWR - ONT

2 stops38h 37mMultiple Airlines

Deal found 10/25

$143

Sat 12/135:59 amEWR - ONT

2 stops37h 34mFrontier

Deal found 10/25

$145

Cheap flight deals from Newark to Ontario

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$225 (Kiwi.com)
One-way from	$100 (Kiwi.com)
Popular in	December
Cheapest in	September
Average price	$401

Provider with most accurate pricing for Newark-Ontario flight deals.

Search Deals

Provider most trusted by Cheapflights users for Newark-Ontario flights.

Search Deals

From Newark to Ontario

Search Deals

One-way flight from Newark to Ontario

Search Deals

Highest demand for flights based on searches. 17% potential increase in price ($84 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease ($25 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

NewarkOntario

EWR - ONT

EWRONT

Newark

Mon 11/10

5:49 pm-11:04 pm

1 stop8h 15m

Ontario

Mon 11/17

10:25 pm-12:04 pm

2 stops10h 39m

$326

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 11/12

4:25 pm-11:05 am

1 stop21h 40m

Ontario

Sat 12/6

7:10 am-6:59 pm

1 stop8h 49m

$327

NewarkOntario

EWR - ONT

EWRONT

Newark

Sat 11/15

7:30 am-3:17 pm

1 stop10h 47m

Ontario

Sat 12/6

6:00 am-6:26 pm

1 stop9h 26m

$327

NewarkOntario

EWR - ONT

EWRONT

Newark

Tue 2/24

3:45 pm-10:37 pm

1 stop9h 52m

Ontario

Wed 3/4

6:00 am-7:02 pm

1 stop10h 02m

$332

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 2/25

3:45 pm-10:37 pm

1 stop9h 52m

Ontario

Thu 3/5

6:00 am-7:02 pm

1 stop10h 02m

$332

NewarkOntario

EWR - ONT

EWRONT

Newark

Thu 2/26

3:45 pm-10:37 pm

1 stop9h 52m

Ontario

Wed 3/4

6:00 am-7:02 pm

1 stop10h 02m

$332

NewarkOntario

EWR - ONT

EWRONT

Newark

Fri 1/23

4:36 pm-11:56 pm

1 stop10h 20m

Ontario

Fri 1/30

6:00 am-6:29 pm

1 stop9h 29m

$332

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 2/25

3:45 pm-10:37 pm

1 stop9h 52m

Ontario

Wed 3/4

6:00 am-7:02 pm

1 stop10h 02m

$332

NewarkOntario

EWR - ONT

EWRONT

Newark

Thu 2/26

3:45 pm-10:37 pm

1 stop9h 52m

Ontario

Tue 3/10

6:00 am-7:02 pm

1 stop10h 02m

$332

NewarkOntario

EWR - ONT

EWRONT

Newark

Thu 12/11

6:00 am-12:18 pm

1 stop9h 18m

Ontario

Wed 12/17

5:05 am-3:47 pm

1 stop7h 42m

$333

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/25

Showing 1-10 of 20 results

Compare providers for flights from Newark to Ontario

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Newark to Ontario in October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
CheapTicketsDeal	Price Accuracy3 stars	Trust 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Newark Airport-Ontario flight deals on Cheapflights vs. eDreams >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

Prices

Delays

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

The best time to book flights from Newark Airport to Ontario is 20 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 $90). Flying from Newark Airport to Ontario in December is currently the most expensive (average of $179). 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?

It’s optimal to fly from Newark Airport to Ontario in the evening. By choosing this option you can save up to 38% on the cost of your flight, compared to a flight in the afternoon.

Reviews of airlines servicing Ontario

Get a feel of what it's like to fly with Delta, United Airlines, and American 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.

Delta

7.9

Good

7,996 reviews

Reviews

1 / 20

10.0

Excellent

Kymberlee,Oct 2024

JFK - ATL

Overall it was good on the flight. Before the flight with checking the bag at JFK was a nightmare. It took way too long and the Delta concierge was very rude to everyone. But other than that it was fine.

Delta

7.9

Good

7,996 reviews

Delta

7.9

Good

7,996 reviews

Reviews

1 / 20

10.0

Excellent

Kymberlee,Oct 2024

JFK - ATL

United Airlines

7.4

Good

8,997 reviews

Delta

7.9

Good

7,996 reviews

Reviews

1 / 20

10.0

Excellent

Kymberlee,Oct 2024

JFK - ATL

American Airlines

7.2

Good

11,033 reviews

Delta

7.9

Good

7,996 reviews

Reviews

1 / 20

10.0

Excellent

Kymberlee,Oct 2024

JFK - ATL

Spirit Airlines

6.3

Okay

8,110 reviews

Delta

7.9

Good

7,996 reviews

Reviews

1 / 20

10.0

Excellent

Kymberlee,Oct 2024

JFK - ATL

Related info for your journey

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.
How long is the flight from Newark Airport to Ontario?
For as low as $326, Delta can have you in Ontario from Newark Airport in 8h 15m. The distance from Newark Airport to Ontario is about 2401 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines flying from Newark Airport to Ontario round-trip?
According to our current data, Spirit Airlines ($116), United Airlines ($267), and American Airlines ($276) offers the cheapest pricing from Newark Airport to Ontario. Spirit Airlines is priced at 71% lower than the current average price of a flight leaving 3 months from now.
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 $90). Flying from Newark Airport to Ontario in December is currently the most expensive (average of $179). 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

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Newark to Ontario

John F Kennedy Intl to Los Angeles flights

John F Kennedy Intl to Las Vegas flights

John F Kennedy Intl to San Francisco flights

Newark to Las Vegas flights

Newark to San Francisco flights

Newark to Los Angeles flights

LaGuardia to Los Angeles flights

LaGuardia to Las Vegas flights

John F Kennedy Intl to San Diego flights

LaGuardia to San Francisco flights

Newark to San Diego flights

LaGuardia to Burbank flights

John F Kennedy Intl to Ontario flights

John F Kennedy Intl to Santa Ana flights

Newark to Santa Ana flights

LaGuardia to San Diego flights

LaGuardia to Santa Ana flights

LaGuardia to Ontario flights

John F Kennedy Intl to Palm Springs flights

Newark to Palm Springs flights

Newark to San Jose flights

Newark to Burbank flights

John F Kennedy Intl to San Jose flights

John F Kennedy Intl to Reno flights

Newark to Sacramento flights

LaGuardia to Palm Springs flights

John F Kennedy Intl to Burbank flights

Newark to Oakland flights

John F Kennedy Intl to Sacramento flights

Newark to Reno flights

John F Kennedy Intl to Oakland flights

LaGuardia to San Jose flights

LaGuardia to Sacramento flights

LaGuardia to Reno flights

John F Kennedy Intl to Santa Barbara flights

Newark to Santa Barbara flights

John F Kennedy Intl to Long Beach flights

John F Kennedy Intl to Fresno flights

Stewart to Las Vegas flights

LaGuardia to Santa Barbara flights

LaGuardia to Oakland flights

Newark to San Luis Obispo flights

LaGuardia to San Luis Obispo flights

Newark to Fresno flights

John F Kennedy Intl to San Luis Obispo flights

Newark to Long Beach flights

LaGuardia to Fresno flights

Stewart to Los Angeles flights

LaGuardia to Monterey flights

Complete your trip

Ontario car rentals

Los Angeles Airport car rentals

Ontario Airport car rentals

Burbank Bob Hope Airport car rentals

Long Beach Municipal Airport car rentals

Los Angeles car rentals

San Diego car rentals

San Francisco car rentals

San Jose car rentals

Fresno car rentals

Sacramento car rentals

Burbank car rentals

Other flights to Ontario

Top 4 airlines flying from Newark to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$116	Average$184	FlexibilityNo cancel fee	On-time65%
United Airlines	Cheapest$267	Average$398	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$276	Average$384	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$276	Average$411	FlexibilityNo cancel fee	On-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$100+ 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 12/11. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Newark to Ontario with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Newark to Ontario are usually found in September or August, booked 38 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Find flight deals from Newark to Ontario

Cheapest flights from Newark to OntarioExplore 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 October 27, 2025.

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 October 27, 2025.

Cheap flight deals from Newark to Ontario

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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 October.

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.

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?

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

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

How often are flights from Newark to Ontario delayed?

What is the most punctual flight time for Newark to Ontario flights?

What day of the week experiences the fewest flight delays on this route?

Which airline has the best punctuality record on Newark to Ontario flights?

Reviews of airlines servicing Ontario

Get a feel of what it's like to fly with Delta, United Airlines, and American 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.

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?

How long is the flight from Newark Airport to Ontario?

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

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

How can I find direct flights from Newark to Ontario?

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Newark to Ontario

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from Newark to Ontario

100% Free

Book with Flexibility

Travel Smart

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 October 27, 2025.