$120+ Cheap flights from Newark (EWR) to Ontario (ONT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
EWR — ONT
Nov 29 — Dec 61
Round-trip
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 October 30, 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 October 30, 2026.
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/26:05 am -
2 stops19h 15m
Tue 12/811:30 am -
2 stops20h 18m
Deal found 10/28![Frontier logo]()
$241
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:00 am -
2 stops19h 17m
Sat 12/1211:30 am -
2 stops20h 18m
Deal found 10/28![Frontier logo]()
$273
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/710:24 pm -
2 stops15h 21m
Tue 12/1511:30 am -
2 stops20h 18m
Deal found 10/28![Frontier logo]()
$275
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:00 am -
2 stops19h 17m
Tue 12/811:30 am -
2 stops20h 18m
Deal found 10/27![Frontier logo]()
$277
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/26:05 am -
2 stops19h 15m
Wed 12/96:00 am -
2 stops12h 29m
Deal found 10/27![Frontier logo]()
$280
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/210:24 pm -
2 stops15h 21m
Sat 12/58:44 am -
2 stops12h 45m
Deal found 10/29![Frontier logo]()
$284
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:00 am -
2 stops19h 17m
Mon 12/1412:36 pm -
2 stops19h 12m
Deal found 10/28![Frontier logo]()
$286
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/410:24 pm -
2 stops26h 53m
Wed 12/168:44 am -
2 stops12h 45m
Deal found 10/28![Frontier logo]()
$289
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/410:24 pm -
2 stops15h 21m
Wed 12/96:00 am -
2 stops12h 29m
Deal found 10/27![Frontier logo]()
$296
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:00 am -
2 stops19h 17m
Tue 12/1511:30 am -
2 stops20h 18m
Deal found 10/27![Frontier logo]()
$299
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/156:00 am -
2 stops19h 17m
Tue 12/226:30 am -
2 stops14h 31m
Deal found 10/28![Frontier logo]()
$300
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 October 30, 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 October 30, 2026.
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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.
Thu 11/197:00 am -
1 stop11h 13m
Fri 1/84:16 pm -
1 stop11h 37m
Deal found 10/26![Alaska Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 10/25. 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.
Wed 11/115:45 pm -
1 stop9h 04m
Wed 11/1812:18 pm -
1 stop9h 37m
Deal found 10/25![Delta logo]()
$449
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/2711:24 am -
1 stop10h 26m
Sun 1/316:37 pm -
1 stop8h 28m
Deal found 10/27![United Airlines logo]()
$529
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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.
Sat 11/77:00 am -
1 stop11h 13m
Thu 11/1912:02 pm -
1 stop8h 57m
Deal found 10/29![Alaska Airlines logo]()
$519
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Mon 11/231:25 pm -
1 stop10h 26m
Wed 12/25:45 am -
1 stop9h 15m
Deal found 10/25![United Airlines logo]()
$529
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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.
Wed 11/117:00 am -
1 stop11h 13m
Thu 11/1912:02 pm -
1 stop8h 57m
Deal found 10/29![Alaska Airlines logo]()
$519
This Delta deal was found by Cheapflights users on 10/29. 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 12/159:00 am -
2 stops14h 58m
Tue 12/225:05 pm -
1 stop9h 30m
Deal found 10/29![Delta logo]()
$577
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/2812:25 pm -
1 stop9h 25m
Sun 1/316:37 pm -
1 stop9h 23m
Deal found 10/27![United Airlines logo]()
$529
This Alaska Airlines deal was found by Cheapflights users on 10/26. 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.
Wed 11/49:30 am -
1 stop11h 47m
Tue 11/104:09 pm -
1 stop10h 31m
Deal found 10/26![Alaska Airlines logo]()
$549
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/121:40 pm -
1 stop10h 20m
Thu 1/146:00 am -
1 stop7h 44m
Deal found 10/27![United Airlines logo]()
$569
This Alaska Airlines deal was found by Cheapflights users on 10/28. 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.
Wed 11/49:30 am -
1 stop11h 47m
Fri 11/1312:02 pm -
1 stop8h 57m
Deal found 10/28![Alaska Airlines logo]()
$549
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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 11/57:00 am -
1 stop11h 13m
Thu 11/1212:02 pm -
1 stop8h 57m
Deal found 10/29![Alaska Airlines logo]()
$589
Last-minute flights from Newark to OntarioDiscover last-minute flight deals from Newark to Ontario. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from Newark to Ontario. Data last updated October 30, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:00 am -
2 stops20h 51m
Wed 11/256:45 am -
2 stops24h 50m
Deal found 10/27![Frontier logo]()
$341
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1711:00 pm -
2 stops20h 38m
Wed 12/211:30 am -
2 stops20h 22m
Deal found 10/28![Frontier logo]()
$355
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:00 am -
2 stops20h 51m
Mon 11/236:45 am -
2 stops12h 08m
Deal found 10/28![Frontier logo]()
$360
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1811:00 pm -
2 stops14h 35m
Sat 12/511:30 am -
2 stops20h 18m
Deal found 10/27![Frontier logo]()
$317
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1811:00 pm -
2 stops14h 35m
Wed 11/2511:40 am -
2 stops19h 55m
Deal found 10/28![Frontier logo]()
$344
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:00 am -
2 stops16h 08m
Thu 11/266:45 am -
2 stops12h 08m
Deal found 10/28![Frontier logo]()
$335
This Frontier deal was found by Cheapflights users on 10/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:00 am -
2 stops20h 51m
Tue 12/111:30 am -
2 stops20h 22m
Deal found 10/27![Frontier logo]()
$364
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1911:35 am -
2 stops21h 45m
Wed 11/256:45 am -
2 stops24h 50m
Deal found 10/29![Frontier logo]()
$365
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2111:00 pm -
2 stops14h 45m
Wed 11/2511:40 am -
2 stops19h 55m
Deal found 10/28![Frontier logo]()
$356
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 October 30, 2026.
Search for one-way flight options from Newark to Ontario. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/810:26 pm -
2 stops15h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Frontier logo]()
$120
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:00 am -
2 stops19h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$131
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/26:05 am -
2 stops19h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$142
This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:00 am -
2 stops20h 51m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 12/410:24 pm -
2 stops26h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Frontier logo]()
$145
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/910:24 pm -
2 stops15h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Frontier logo]()
$148
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1110:26 pm -
2 stops15h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Frontier logo]()
$151
This Mytrip deal was found by Cheapflights users on 10/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:00 am -
2 stops20h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$154
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 October 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $241 (Mytrip) |
One-way from | $120 (Mytrip) |
Popular in | June |
Cheapest in | January |
Average price | $447 |
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 7,457,451 searches. Data last updated October 30, 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
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Fri 12/4
7:00 am-4:05 pm
1 stop12h 05m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$220
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Tue 12/15
7:00 am-4:05 pm
1 stop12h 05m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$220
Quickest round-trip
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Thu 11/26
1:35 pm-7:49 pm
1 stop9h 14m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$240
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Tue 11/17
9:30 am-6:17 pm
1 stop11h 47m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$250
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Thu 11/12
3:29 pm-11:06 pm
1 stop10h 37m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$250
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Sat 11/14
9:30 am-6:17 pm
1 stop11h 47m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$250
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Wed 12/2
7:00 am-4:05 pm
1 stop12h 05m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$276
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Tue 1/26
1:30 pm-8:01 pm
1 stop9h 31m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$285
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Thu 1/14
2:01 pm-10:15 pm
1 stop11h 14m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$325
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Thu 11/26
6:00 am-12:33 pm
1 stop9h 33m
Ontario
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$325
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 October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy1 star | 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
More
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 27 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, January is the cheapest month in which you can book a flight from Newark Airport to Ontario (average of $384). Flying from Newark Airport to Ontario in June is currently the most expensive (average of $633). 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 much does it cost to fly round-trip from Newark Airport to Ontario?
Airfare is below average for this route at the moment.
Newark Airport to Ontario flights typically cost between $378 and $473 in December.The cheapest round-trip price found within the last 5 days was $241 on Frontier (Dec 2-Dec 8).
How often are flights from Newark to Ontario delayed?
About 13% of weekly flights between Newark and Ontario have experienced delays in the past year, with the average delay time being 94 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.
What’s the top layover airport for flights from Newark Airport to Ontario?
Share of 1-stop round-trip flights from Newark Airport to Ontario chosen by Cheapflights users in the past 12 months, using the same layover each way.
Phoenix (PHX) – chosen by Cheapflights users on 50% of 1-stop itineraries from Newark Airport to Ontario on Cheapflights.
What’s the cheapest layover airport for flights from Newark Airport to Ontario?
Average round-trip fare for 1-stop flights from Newark Airport to Ontario, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Portland (PDX) is the most affordable 1-stop option, with an average round-trip price of $476.
What’s the fastest layover option from Newark Airport to Ontario?
Shortest average travel time for 1-stop one-way flights from Newark Airport to Ontario, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Phoenix (PHX) have the shortest average one-way travel time for 1-stop routes: 8h 01m.
Which airport typically offers the quickest layover for flights from Newark Airport to Ontario?
Average layover duration for 1-stop one-way flights from Newark Airport to Ontario, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Portland (PDX) offer the fastest connection on this route, with an average layover time of 0h 40m.
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 October 30, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Delta, andUnited 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
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
2.0
MediocreJames Cezar,Jan 2023
JFK - SFO
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
2.0
MediocreJames Cezar,Jan 2023
JFK - SFO
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
2.0
MediocreJames Cezar,Jan 2023
JFK - SFO
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
2.0
MediocreJames Cezar,Jan 2023
JFK - SFO
Entertainment
7.0
Food
7.0
Overall
7.9
Boarding
8.1
Comfort
7.8
Crew
8.5
Reviews
1 / 20
2.0
MediocreJames Cezar,Jan 2023
JFK - SFO
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.
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 October 30, 2026.
Newark and Ontario flights
Browse other Newark and Ontario flight options. Last updated on October 30, 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 October 30, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Newark to Ontario
Discover the top 4 airlines that operate flights from Newark to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$286 | Average$474 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$338 | Average$576 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$348 | Average$438 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$378 | Average$476 | FlexibilityNo cancel fee | On-time75% |