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$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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
EWR — ONT
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
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Cheap 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 March 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/155:59 am
EWR
-
ONT
2 stops20h 56m
Multiple Airlines
Tue 4/217:44 pm
ONT
-
EWR
1 stop8h 18m
Multiple Airlines
Deal found 3/5$205
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/510:29 pm
EWR
-
ONT
2 stops52h 27m
Multiple Airlines
Tue 4/147:44 pm
ONT
-
EWR
1 stop8h 11m
Multiple Airlines
Deal found 3/6$206
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/710:54 pm
EWR
-
ONT
2 stops28h 02m
Multiple Airlines
Wed 4/157:44 pm
ONT
-
EWR
1 stop8h 18m
Multiple Airlines
Deal found 3/5$216
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:55 pm
EWR
-
ONT
1 stop25h 45m
Multiple Airlines
Mon 5/1111:44 am
ONT
-
EWR
1 stop15h 46m
Multiple Airlines
Deal found 3/9$217
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2010:29 pm
EWR
-
ONT
2 stops28h 26m
Multiple Airlines
Mon 4/272:05 pm
ONT
-
EWR
1 stop13h 25m
Multiple Airlines
Deal found 3/6$218
This Kiwi.com deal was found by Cheapflights users on 3/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1710:29 pm
EWR
-
ONT
2 stops28h 26m
Multiple Airlines
Wed 4/2911:44 am
ONT
-
EWR
1 stop16h 13m
Multiple Airlines
Deal found 3/5$227
This Kiwi.com deal was found by Cheapflights users on 3/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/710:29 pm
EWR
-
ONT
2 stops36h 35m
Multiple Airlines
Tue 4/147:44 pm
ONT
-
EWR
1 stop8h 11m
Multiple Airlines
Deal found 3/7$233
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1410:29 pm
EWR
-
ONT
2 stops28h 26m
Multiple Airlines
Mon 4/2011:44 am
ONT
-
EWR
1 stop15h 46m
Multiple Airlines
Deal found 3/9$237
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/155:59 am
EWR
-
ONT
2 stops20h 56m
Multiple Airlines
Thu 4/2311:47 am
ONT
-
EWR
1 stop15h 43m
Multiple Airlines
Deal found 3/9$239
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1410:15 pm
EWR
-
ONT
1 stop15h 29m
Multiple Airlines
Sat 4/257:44 pm
ONT
-
EWR
1 stop7h 46m
Multiple Airlines
Deal found 3/9$241

Find 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 March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$205
(Kiwi.com)

One-way from

$100
(Trip.com)

Popular in

February

Cheapest in

September

Average price

$347
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. 3% potential increase in price ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 10, 2026.
Use the filters below to find and compare flights from Newark Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 4/22

7:15 am-12:14 pm

1 stop7h 59m

Ontario

Fri 4/24

12:49 pm-11:43 pm

1 stop7h 54m

$343

NewarkOntario

EWR - ONT

EWRONT

Newark

Sat 5/9

5:33 pm-11:48 pm

1 stop9h 15m

Ontario

Tue 5/12

10:39 am-11:29 pm

1 stop9h 50m

$362

NewarkOntario

EWR - ONT

EWRONT

Newark

Tue 4/14

9:00 am-6:13 pm

1 stop12h 13m

Ontario

Wed 4/22

10:39 am-11:29 pm

1 stop9h 50m

$362

NewarkOntario

EWR - ONT

EWRONT

Newark

Sat 4/25

7:29 am-2:32 pm

1 stop10h 03m

Ontario

Sat 5/2

10:39 am-11:29 pm

1 stop9h 50m

$372

NewarkOntario

EWR - ONT

EWRONT

Newark

Mon 6/8

4:45 pm-10:46 pm

1 stop9h 01m

Ontario

Sun 6/14

5:45 am-7:35 pm

1 stop10h 50m

$408

NewarkOntario

EWR - ONT

EWRONT

Newark

Sat 5/9

5:33 pm-11:48 pm

1 stop9h 15m

Ontario

Mon 5/11

3:26 pm-6:39 am

1 stop12h 13m

$432

NewarkOntario

EWR - ONT

EWRONT

Newark

Wed 4/8

7:20 am-5:09 pm

2 stops12h 49m

Ontario

Wed 4/15

10:33 am-11:11 pm

1 stop9h 38m

$436

NewarkOntario

EWR - ONT

EWRONT

Newark

Sat 5/9

6:00 am-5:52 pm

2 stops14h 52m

Ontario

Tue 5/12

1:30 pm-12:56 am

1 stop8h 26m

$442

NewarkOntario

EWR - ONT

EWRONT

Newark

Sat 5/9

2:10 pm-8:36 pm

1 stop9h 26m

Ontario

Sat 5/16

1:40 pm-11:57 pm

1 stop7h 17m

$447

NewarkOntario

EWR - ONT

EWRONT

Newark

Tue 5/5

7:29 am-2:32 pm

1 stop10h 03m

Ontario

Mon 5/11

3:26 pm-6:39 am

1 stop12h 13m

$447

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/6

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 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 FlightHub the most. FlightHub 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 March 6, 2026.

The best time to book flights from Newark Airport to Ontario is 33 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 March is currently the most expensive (average of $174). 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.

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 March 10, 2026.
Get a feel of what it's like to fly with Delta,United Airlines, andAmerican 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
8,276 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.8

Food

7.2

Crew

8.5

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
8,276 reviews
Delta
7.9
Good
8,276 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.8

Food

7.2

Crew

8.5

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.
United Airlines
7.4
Good
9,409 reviews
Delta
7.9
Good
8,276 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.8

Food

7.2

Crew

8.5

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.
American Airlines
7.1
Good
11,413 reviews
Delta
7.9
Good
8,276 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.8

Food

7.2

Crew

8.5

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.

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 3 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 $343, Delta can have you in Ontario from Newark Airport in 7h 59m. 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, American Airlines ($271), Delta ($276), and United Airlines ($286) offers the cheapest pricing from Newark Airport to Ontario. American Airlines is priced at 32% 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 Spirit Airlines ($97), United Airlines ($128), and Alaska Airlines ($128).

  • 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 March is currently the most expensive (average of $174). 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 3 airlines flying from Newark to Ontario

Discover the top 3 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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$271Average$358FlexibilityNo cancel feeOn-time71%
DeltaCheapest$276Average$432FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$286Average$396FlexibilityNo cancel feeOn-time69%

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