$96+ 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 4/24. Fares are subject to change and may not be available on all flights or dates of travel.
EWR — ONT
Apr 1 — Apr 81
1 adult, Economy
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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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Newark to Ontario
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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 March 2, 2026.
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 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:00 am
EWR
- ONT
1 stop13h 49m
Multiple Airlines
Tue 4/217:44 pm
ONT
- EWR
1 stop8h 18m
Multiple Airlines
Deal found 2/28![Multiple Airlines logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/75:39 pm
EWR
- ONT
2 stops33h 17m
Multiple Airlines
Tue 4/1411:44 am
ONT
- EWR
1 stop16h 11m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 2/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/152:55 pm
EWR
- ONT
1 stop20h 29m
Multiple Airlines
Mon 4/208:59 pm
ONT
- EWR
1 stop31h 03m
Multiple Airlines
Deal found 2/28![Multiple Airlines logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1310:54 pm
EWR
- ONT
2 stops38h 50m
Multiple Airlines
Mon 4/208:59 pm
ONT
- EWR
1 stop31h 03m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 2/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/282:55 pm
EWR
- ONT
1 stop22h 49m
Multiple Airlines
Fri 5/88:26 am
ONT
- EWR
2 stops13h 50m
Multiple Airlines
Deal found 2/28![Multiple Airlines logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:09 pm
EWR
- ONT
1 stop22h 29m
Multiple Airlines
Mon 4/208:59 pm
ONT
- EWR
1 stop31h 03m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1110:29 pm
EWR
- ONT
2 stops52h 26m
Multiple Airlines
Tue 6/24:08 pm
ONT
- EWR
1 stop11h 54m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/135:59 am
EWR
- ONT
2 stops28h 32m
Multiple Airlines
Sat 5/304:08 pm
ONT
- EWR
1 stop11h 22m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 3/1. 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 5/112:55 pm
EWR
- ONT
1 stop8h 09m
Multiple Airlines
Wed 6/34:08 pm
ONT
- EWR
1 stop11h 54m
Multiple Airlines
Deal found 3/1![Multiple Airlines logo]()
$256
Best flights from Newark to OntarioDiscover 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 March 2, 2026.
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 March 2, 2026.
This Alaska Airlines deal was found by Cheapflights users on 2/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/73:30 pm
EWR
- ONT
1 stop11h 29m
Alaska Airlines
Mon 5/113:26 pm
ONT
- EWR
1 stop12h 13m
Alaska Airlines
Deal found 2/27![Alaska Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 3/1. 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.
Thu 4/236:00 am
EWR
- ONT
1 stop8h 36m
Delta
Sat 5/212:49 pm
ONT
- EWR
1 stop9h 02m
Delta
Deal found 3/1![Delta logo]()
$348
This United Airlines deal was found by Cheapflights users on 3/1. 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.
Wed 4/86:00 am
EWR
- ONT
2 stops14h 47m
United Airlines
Tue 4/141:34 pm
ONT
- EWR
1 stop7h 10m
United Airlines
Deal found 3/1![United Airlines logo]()
$427
This Alaska Airlines deal was found by Cheapflights users on 2/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/243:27 pm
EWR
- ONT
1 stop11h 32m
Alaska Airlines
Wed 4/16:00 am
ONT
- EWR
1 stop14h 11m
Alaska Airlines
Deal found 2/26![Alaska Airlines logo]()
$365
This Alaska Airlines deal was found by Cheapflights users on 2/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/234:55 pm
EWR
- ONT
1 stop10h 04m
Alaska Airlines
Tue 4/710:33 am
ONT
- EWR
1 stop9h 38m
Alaska Airlines
Deal found 2/26![Alaska Airlines logo]()
$387
This Alaska Airlines deal was found by Cheapflights users on 2/28. 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 4/73:30 pm
EWR
- ONT
1 stop11h 29m
Alaska Airlines
Tue 4/1410:33 am
ONT
- EWR
1 stop9h 38m
Alaska Airlines
Deal found 2/28![Alaska Airlines logo]()
$387
This United Airlines deal was found by Cheapflights users on 2/26. 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.
Sat 4/114:45 pm
EWR
- ONT
1 stop8h 41m
United Airlines
Sun 4/195:10 am
ONT
- EWR
1 stop7h 54m
United Airlines
Deal found 2/26![United Airlines logo]()
$483
This Delta deal was found by Cheapflights users on 2/27. 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.
Tue 3/103:58 pm
EWR
- ONT
1 stop8h 02m
Delta
Mon 3/231:20 pm
ONT
- EWR
1 stop7h 39m
Delta
Deal found 2/27![Delta logo]()
$503
This Alaska Airlines deal was found by Cheapflights users on 2/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/314:55 pm
EWR
- ONT
1 stop10h 04m
Alaska Airlines
Tue 4/710:33 am
ONT
- EWR
1 stop9h 38m
Alaska Airlines
Deal found 2/26![Alaska Airlines logo]()
$387
This Alaska Airlines deal was found by Cheapflights users on 2/28. 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.
Fri 4/175:38 pm
EWR
- ONT
1 stop26h 31m
Alaska Airlines
Tue 4/214:22 pm
ONT
- EWR
2 stops20h 09m
Alaska Airlines
Deal found 2/28![Alaska Airlines logo]()
$429
This Alaska Airlines deal was found by Cheapflights users on 3/2. 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.
Fri 3/65:30 pm
EWR
- ONT
1 stop9h 22m
Alaska Airlines
Sat 3/147:00 am
ONT
- EWR
1 stop8h 59m
Alaska Airlines
Deal found 3/2![Alaska Airlines logo]()
$498
Last-minute flights from Newark to OntarioDiscover last-minute flight deals from Newark to Ontario. Data last updated March 2, 2026 and is based on user searches.
Discover last-minute flight deals from Newark to Ontario. Data last updated March 2, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/75:39 pm
EWR
- ONT
2 stops33h 17m
Multiple Airlines
Tue 4/1411:44 am
ONT
- EWR
1 stop16h 11m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$229
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1310:54 pm
EWR
- ONT
2 stops38h 50m
Multiple Airlines
Mon 4/208:59 pm
ONT
- EWR
1 stop31h 03m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 3/2. 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 4/145:59 am
EWR
- ONT
2 stops20h 56m
Multiple Airlines
Sat 4/1811:44 am
ONT
- EWR
1 stop15h 46m
Multiple Airlines
Deal found 3/2![Multiple Airlines logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 2/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:00 am
EWR
- ONT
1 stop13h 49m
Multiple Airlines
Tue 4/217:44 pm
ONT
- EWR
1 stop8h 18m
Multiple Airlines
Deal found 2/28![Multiple Airlines logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 2/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/152:55 pm
EWR
- ONT
1 stop20h 29m
Multiple Airlines
Mon 4/208:59 pm
ONT
- EWR
1 stop31h 03m
Multiple Airlines
Deal found 2/28![Multiple Airlines logo]()
$231
This Kiwi.com deal was found by Cheapflights users on 3/2. 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.
Thu 4/169:09 pm
EWR
- ONT
1 stop22h 29m
Multiple Airlines
Tue 4/217:44 pm
ONT
- EWR
1 stop8h 18m
Multiple Airlines
Deal found 3/2![Multiple Airlines logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/169:09 pm
EWR
- ONT
1 stop22h 29m
Multiple Airlines
Mon 4/208:59 pm
ONT
- EWR
1 stop31h 03m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 2/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/282:55 pm
EWR
- ONT
1 stop22h 49m
Multiple Airlines
Fri 5/88:26 am
ONT
- EWR
2 stops13h 50m
Multiple Airlines
Deal found 2/28![Multiple Airlines logo]()
$236
One-way flights from Newark to OntarioSearch for one-way flight options from Newark to Ontario. Find affordable one-way fares based on user searches. Data last updated March 2, 2026.
Search for one-way flight options from Newark to Ontario. Find affordable one-way fares based on user searches. Data last updated March 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2410:29 pm
EWR
- ONT
2 stops28h 26m
Frontier
Deal found 2/27![Frontier logo]()
$96
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/3010:29 pm
EWR
- ONT
2 stops52h 26m
Frontier
Deal found 2/27![Frontier logo]()
$110
This Trip.com deal was found by Cheapflights users on 2/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:00 am
EWR
- ONT
1 stop13h 49m
Multiple Airlines
Deal found 2/28![Multiple Airlines logo]()
$111
This Kiwi.com deal was found by Cheapflights users on 3/1. 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 4/272:55 pm
EWR
- ONT
1 stop22h 49m
Multiple Airlines
Deal found 3/1![Multiple Airlines logo]()
$119
This Kiwi.com deal was found by Cheapflights users on 3/2. 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.
Thu 4/235:59 am
EWR
- ONT
2 stops37h 39m
Frontier
Deal found 3/2![Frontier logo]()
$126
This Trip.com deal was found by Cheapflights users on 2/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/242:55 pm
EWR
- ONT
1 stop9h 09m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 3/1. 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 5/137:05 pm
EWR
- ONT
1 stop24h 33m
Multiple Airlines
Deal found 3/1![Multiple Airlines logo]()
$130
This Kiwi.com deal was found by Cheapflights users on 2/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3010:18 pm
EWR
- ONT
2 stops44h 39m
Frontier
Deal found 2/26![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 3/1. 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
Deal found 3/1![Multiple Airlines logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/309:09 pm
EWR
- ONT
1 stop22h 29m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$134
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 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $208 (Kiwi.com) |
One-way from | $96 (Kiwi.com) |
Popular in | December |
Cheapest in | September |
Average price | $368 |
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 2, 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
NewarkOntario
EWR - ONT
EWRONT
Newark
Thu 5/7
3:30 pm-11:59 pm
1 stop11h 29m
Ontario
Mon 5/11
3:26 pm-6:39 am
1 stop12h 13m
$329
NewarkOntario
EWR - ONT
EWRONT
Newark
Thu 4/23
6:00 am-11:36 am
1 stop8h 36m
Ontario
Sat 5/2
12:49 pm-12:51 am
1 stop9h 02m
$348
NewarkOntario
EWR - ONT
EWRONT
Newark
Tue 3/24
3:27 pm-11:59 pm
1 stop11h 32m
Ontario
Wed 4/1
6:00 am-11:11 pm
1 stop14h 11m
$365
NewarkOntario
EWR - ONT
EWRONT
Newark
Mon 3/23
4:55 pm-11:59 pm
1 stop10h 04m
Ontario
Tue 4/7
10:33 am-11:11 pm
1 stop9h 38m
$387
NewarkOntario
EWR - ONT
EWRONT
Newark
Tue 4/7
3:30 pm-11:59 pm
1 stop11h 29m
Ontario
Tue 4/14
10:33 am-11:11 pm
1 stop9h 38m
$387
NewarkOntario
EWR - ONT
EWRONT
Newark
Tue 3/31
4:55 pm-11:59 pm
1 stop10h 04m
Ontario
Tue 4/7
10:33 am-11:11 pm
1 stop9h 38m
$387
NewarkOntario
EWR - ONT
EWRONT
Newark
Wed 4/8
6:00 am-5:47 pm
2 stops14h 47m
Ontario
Tue 4/14
1:34 pm-11:44 pm
1 stop7h 10m
$427
NewarkOntario
EWR - ONT
EWRONT
Newark
Fri 4/17
5:38 pm-5:09 pm
1 stop26h 31m
Ontario
Tue 4/21
4:22 pm-3:31 pm
2 stops20h 09m
$429
NewarkOntario
EWR - ONT
EWRONT
Newark
Sat 4/11
4:45 pm-10:26 pm
1 stop8h 41m
Ontario
Sun 4/19
5:10 am-4:04 pm
1 stop7h 54m
$483
NewarkOntario
EWR - ONT
EWRONT
Newark
Fri 3/6
5:30 pm-11:52 pm
1 stop9h 22m
Ontario
Sat 3/14
7:00 am-6:59 pm
1 stop8h 59m
$498
Showing 1-10 of 23 resultsSorted by cheapest first
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.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
EWR-ONT
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?
Use this chart to determine the optimal time to book a round-trip flight from Newark to Ontario. Price data was last updated on February 27, 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 December is currently the most expensive (average of $156). 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.
How often are flights from Newark to Ontario delayed?
About 16% of weekly flights between Newark and Ontario have experienced delays in the past year, with the average delay time being 136 minutes.
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.
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 2, 2026.
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.
Entertainment
7.8
Comfort
7.9
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentKymberlee,Oct 2024
JFK - ATL
Entertainment
7.8
Comfort
7.9
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentKymberlee,Oct 2024
JFK - ATL
Entertainment
7.8
Comfort
7.9
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentKymberlee,Oct 2024
JFK - ATL
Entertainment
7.8
Comfort
7.9
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentKymberlee,Oct 2024
JFK - ATL
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.
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Alternative routes for Newark to Ontario
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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from Newark to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 2, 2026.
Newark and Ontario flights
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Other flights from Newark
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Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$275 | Average$362 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$276 | Average$418 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$390 | FlexibilityNo cancel fee | On-time69% |