$80+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
EWR — ONT
Apr 23 — Apr 301
Round-trip
1 adult, Economy
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Find cheap flights from Newark to Ontario with Cheapflights
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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 März 24, 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 März 24, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/19. 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.
Di 4/1410:15 pm
EWR
- ONT
1 stop15h 29m
Multiple Airlines
Di 4/217:44 pm
ONT
- EWR
1 stop8h 18m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 3/19. 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.
Mi 4/158:00 am
EWR
- ONT
1 stop13h 49m
Multiple Airlines
Mi 4/227:44 pm
ONT
- EWR
1 stop8h 18m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 3/23. 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.
Di 5/52:59 pm
EWR
- ONT
1 stop27h 45m
Multiple Airlines
Di 5/124:39 pm
ONT
- EWR
1 stop11h 23m
Multiple Airlines
Deal found 3/23![Multiple Airlines logo]()
$239
This Kiwi.com deal was found by Cheapflights users on 3/19. 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.
Di 4/75:59 am
EWR
- ONT
2 stops44h 57m
Multiple Airlines
Mi 4/157:44 pm
ONT
- EWR
1 stop8h 18m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 3/23. 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.
Mo 5/42:59 pm
EWR
- ONT
1 stop27h 45m
Multiple Airlines
Di 5/124:39 pm
ONT
- EWR
1 stop11h 23m
Multiple Airlines
Deal found 3/23![Multiple Airlines logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 3/23. 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.
Di 5/52:59 pm
EWR
- ONT
1 stop27h 45m
Multiple Airlines
Sa 5/94:04 pm
ONT
- EWR
1 stop11h 26m
Multiple Airlines
Deal found 3/23![Multiple Airlines logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 3/23. 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.
Mi 5/62:59 pm
EWR
- ONT
2 stops22h 52m
Multiple Airlines
Di 5/124:39 pm
ONT
- EWR
1 stop11h 23m
Multiple Airlines
Deal found 3/23![Multiple Airlines logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 3/23. 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.
Di 5/57:12 pm
EWR
- ONT
1 stop15h 23m
Multiple Airlines
Mi 5/64:39 pm
ONT
- EWR
1 stop11h 23m
Multiple Airlines
Deal found 3/23![Multiple Airlines logo]()
$271
This Kiwi.com deal was found by Cheapflights users on 3/23. 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.
So 5/32:55 pm
EWR
- ONT
1 stop20h 09m
Multiple Airlines
Mi 5/64:39 pm
ONT
- EWR
1 stop11h 23m
Multiple Airlines
Deal found 3/23![Multiple Airlines logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 3/23. 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.
Fr 5/89:09 pm
EWR
- ONT
1 stop14h 11m
Multiple Airlines
Di 5/124:39 pm
ONT
- EWR
1 stop11h 23m
Multiple Airlines
Deal found 3/23![Multiple Airlines logo]()
$282
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 März 24, 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 März 24, 2026.
This Delta deal was found by Cheapflights users on 3/21. 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.
Mi 9/26:00 am
EWR
- ONT
1 stop8h 04m
Delta
Sa 9/57:00 am
ONT
- EWR
1 stop7h 47m
Delta
Deal found 3/21![Delta logo]()
$389
This Alaska Airlines deal was found by Cheapflights users on 3/19. 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.
Mi 8/195:41 pm
EWR
- ONT
1 stop9h 18m
Alaska Airlines
Di 9/110:03 am
ONT
- EWR
1 stop10h 10m
Alaska Airlines
Deal found 3/19![Alaska Airlines logo]()
$389
This United Airlines deal was found by Cheapflights users on 3/19. 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.
Di 5/266:00 am
EWR
- ONT
1 stop9h 47m
United Airlines
Mo 6/16:30 pm
ONT
- EWR
1 stop8h 10m
United Airlines
Deal found 3/19![United Airlines logo]()
$499
This Alaska Airlines deal was found by Cheapflights users on 3/23. 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.
Mi 4/223:30 pm
EWR
- ONT
1 stop10h 02m
Alaska Airlines
Mi 4/2910:39 am
ONT
- EWR
1 stop9h 50m
Alaska Airlines
Deal found 3/23![Alaska Airlines logo]()
$389
This Delta deal was found by Cheapflights users on 3/19. 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.
Do 5/286:30 pm
EWR
- ONT
1 stop8h 04m
Delta
Di 6/24:57 pm
ONT
- EWR
1 stop10h 03m
Delta
Deal found 3/19![Delta logo]()
$477
This Alaska Airlines deal was found by Cheapflights users on 3/23. 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.
Do 4/163:30 pm
EWR
- ONT
1 stop11h 29m
Alaska Airlines
Fr 4/176:25 pm
ONT
- EWR
2 stops19h 13m
Alaska Airlines
Deal found 3/23![Alaska Airlines logo]()
$442
This United Airlines deal was found by Cheapflights users on 3/21. 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.
Fr 4/33:15 pm
EWR
- ONT
1 stop10h 16m
United Airlines
Fr 4/241:43 pm
ONT
- EWR
1 stop7h 01m
United Airlines
Deal found 3/21![United Airlines logo]()
$548
This Alaska Airlines deal was found by Cheapflights users on 3/21. 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.
Mi 4/155:00 pm
EWR
- ONT
1 stop9h 59m
Alaska Airlines
Mo 4/207:00 am
ONT
- EWR
1 stop8h 29m
Alaska Airlines
Deal found 3/21![Alaska Airlines logo]()
$513
This Alaska Airlines deal was found by Cheapflights users on 3/22. 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.
Mi 8/125:05 pm
EWR
- ONT
1 stop9h 49m
Alaska Airlines
So 8/165:32 pm
ONT
- EWR
1 stop9h 33m
Alaska Airlines
Deal found 3/22![Alaska Airlines logo]()
$572
This Alaska Airlines deal was found by Cheapflights users on 3/20. 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.
Do 7/99:30 am
EWR
- ONT
1 stop10h 14m
Alaska Airlines
Do 7/165:32 pm
ONT
- EWR
1 stop9h 33m
Alaska Airlines
Deal found 3/20![Alaska Airlines logo]()
$572
This Alaska Airlines deal was found by Cheapflights users on 3/22. 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.
Fr 5/15:33 pm
EWR
- ONT
1 stop9h 15m
Alaska Airlines
So 5/310:39 am
ONT
- EWR
1 stop9h 50m
Alaska Airlines
Deal found 3/22![Alaska Airlines logo]()
$572
This Alaska Airlines deal was found by Cheapflights users on 3/21. 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.
Di 6/27:30 am
EWR
- ONT
1 stop10h 39m
Alaska Airlines
Sa 6/64:03 pm
ONT
- EWR
1 stop11h 49m
Alaska Airlines
Deal found 3/21![Alaska Airlines logo]()
$572
Last-minute flights from Newark to OntarioDiscover last-minute flight deals from Newark to Ontario. Data last updated März 24, 2026 and is based on user searches.
Discover last-minute flight deals from Newark to Ontario. Data last updated März 24, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 3/19. 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.
Di 4/75:59 am
EWR
- ONT
2 stops44h 57m
Multiple Airlines
Mi 4/157:44 pm
ONT
- EWR
1 stop8h 18m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 3/19. 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.
Di 4/1410:15 pm
EWR
- ONT
1 stop15h 29m
Multiple Airlines
Di 4/217:44 pm
ONT
- EWR
1 stop8h 18m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 3/21. 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.
Di 4/1410:15 pm
EWR
- ONT
1 stop15h 29m
Multiple Airlines
Mo 4/208:26 am
ONT
- EWR
2 stops34h 03m
Multiple Airlines
Deal found 3/21![Multiple Airlines logo]()
$317
This Kiwi.com deal was found by Cheapflights users on 3/19. 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.
Mi 4/158:00 am
EWR
- ONT
1 stop13h 49m
Multiple Airlines
Mi 4/227:44 pm
ONT
- EWR
1 stop8h 18m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$233
This Kiwi.com deal was found by Cheapflights users on 3/19. 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.
Do 4/163:59 pm
EWR
- ONT
2 stops19h 25m
Multiple Airlines
Mo 4/208:59 pm
ONT
- EWR
1 stop31h 03m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 3/19. 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.
So 4/192:55 pm
EWR
- ONT
1 stop22h 19m
Multiple Airlines
Sa 5/27:44 pm
ONT
- EWR
1 stop7h 46m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$294
This Kiwi.com deal was found by Cheapflights users on 3/23. 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.
Do 4/3010:29 pm
EWR
- ONT
2 stops21h 09m
Multiple Airlines
Mi 5/64:39 pm
ONT
- EWR
1 stop11h 23m
Multiple Airlines
Deal found 3/23![Multiple Airlines logo]()
$299
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 März 24, 2026.
Search for one-way flight options from Newark to Ontario. Find affordable one-way fares based on user searches. Data last updated März 24, 2026.
This Frontier deal was found by Cheapflights users on 3/23. 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.
Di 5/51:30 pm
EWR
- ONT
1 stop8h 41m
Frontier
Deal found 3/23![Frontier logo]()
$80
This Frontier deal was found by Cheapflights users on 3/20. 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.
Di 5/121:30 pm
EWR
- ONT
1 stop8h 41m
Frontier
Deal found 3/20![Frontier logo]()
$81
This Frontier deal was found by Cheapflights users on 3/24. 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.
Do 5/281:30 pm
EWR
- ONT
1 stop8h 41m
Frontier
Deal found 3/24![Frontier logo]()
$110
This Kiwi.com deal was found by Cheapflights users on 3/19. 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.
Di 5/122:59 pm
EWR
- ONT
1 stop31h 33m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$112
This Trip.com deal was found by Cheapflights users on 3/20. 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.
Mi 4/158:00 am
EWR
- ONT
1 stop13h 49m
Multiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 3/19. 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.
Mo 5/42:59 pm
EWR
- ONT
1 stop31h 33m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$124
This Frontier deal was found by Cheapflights users on 3/20. 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.
Mi 5/201:30 pm
EWR
- ONT
1 stop8h 41m
Frontier
Deal found 3/20![Frontier logo]()
$125
This Frontier deal was found by Cheapflights users on 3/23. 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.
Do 6/41:30 pm
EWR
- ONT
1 stop8h 41m
Frontier
Deal found 3/23![Frontier logo]()
$126
This Kiwi.com deal was found by Cheapflights users on 3/20. 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.
Di 4/75:59 am
EWR
- ONT
2 stops44h 57m
Frontier
Deal found 3/20![Frontier logo]()
$128
This Trip.com deal was found by Cheapflights users on 3/19. 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.
So 4/192:55 pm
EWR
- ONT
1 stop22h 19m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$131
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 März 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $211 (Kiwi.com) |
One-way from | $80 (Frontier) |
Popular in | February |
Cheapest in | September |
Average price | $372 |
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 März 24, 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
Cheapest round-trip
Quickest round-trip
NewarkOntario
EWR - ONT
EWRONT
Newark
Mi 9/2
6:00 am-11:04 am
1 stop8h 04m
Ontario
Sa 9/5
7:00 am-5:47 pm
1 stop7h 47m
$389
NewarkOntario
EWR - ONT
EWRONT
Newark
Mi 8/19
5:41 pm-11:59 pm
1 stop9h 18m
Ontario
Di 9/1
10:03 am-11:13 pm
1 stop10h 10m
$389
NewarkOntario
EWR - ONT
EWRONT
Newark
Mi 4/22
3:30 pm-10:32 pm
1 stop10h 02m
Ontario
Mi 4/29
10:39 am-11:29 pm
1 stop9h 50m
$389
NewarkOntario
EWR - ONT
EWRONT
Newark
Do 4/16
3:30 pm-11:59 pm
1 stop11h 29m
Ontario
Fr 4/17
6:25 pm-4:38 pm
2 stops19h 13m
$442
NewarkOntario
EWR - ONT
EWRONT
Newark
Do 5/28
6:30 pm-11:34 pm
1 stop8h 04m
Ontario
Di 6/2
4:57 pm-6:00 am
1 stop10h 03m
$477
NewarkOntario
EWR - ONT
EWRONT
Newark
Di 5/26
6:00 am-12:47 pm
1 stop9h 47m
Ontario
Mo 6/1
6:30 pm-5:40 am
1 stop8h 10m
$499
NewarkOntario
EWR - ONT
EWRONT
Newark
Mi 4/15
5:00 pm-11:59 pm
1 stop9h 59m
Ontario
Mo 4/20
7:00 am-6:29 pm
1 stop8h 29m
$513
NewarkOntario
EWR - ONT
EWRONT
Newark
Fr 4/3
3:15 pm-10:31 pm
1 stop10h 16m
Ontario
Fr 4/24
1:43 pm-11:44 pm
1 stop7h 01m
$548
NewarkOntario
EWR - ONT
EWRONT
Newark
Mi 8/12
5:05 pm-11:54 pm
1 stop9h 49m
Ontario
So 8/16
5:32 pm-6:05 am
1 stop9h 33m
$572
NewarkOntario
EWR - ONT
EWRONT
Newark
Do 7/9
9:30 am-4:44 pm
1 stop10h 14m
Ontario
Do 7/16
5:32 pm-6:05 am
1 stop9h 33m
$572
Showing 1-10 of 24 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 |
- 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 March 13, 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.
How often are flights from Newark to Ontario delayed?
About 15% of weekly flights between Newark and Ontario have experienced delays in the past year, with the average delay time being 138 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 März 24, 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.
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentKymberlee,Oct 2024
JFK - ATL
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentKymberlee,Oct 2024
JFK - ATL
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
Reviews
1 / 20
10.0
ExcellentKymberlee,Oct 2024
JFK - ATL
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Food
7.2
Crew
8.5
Overall
7.9
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 to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Newark to Ontario by cabin class
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 März 24, 2026.
Newark and Ontario flights
Browse other Newark and Ontario flight options. Last updated on März 24, 2026.
Other flights from Newark
Browse through other flights departing from Newark. Flights are based on user searches made on Cheapflights and were last updated on März 24, 2026.
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 März 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$271 | Average$355 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$276 | Average$432 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$286 | Average$438 | FlexibilityNo cancel fee | On-time69% |