$124+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
EWR — ONT
Sep 26 — Oct 31
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Newark to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Newark to Ontario
Cheapest
Best
Last-minute
One-way
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 August 27, 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 August 27, 2026.
This Frontier deal was found by Cheapflights users on 8/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/161:45 pm -
1 stop8h 23m
Mon 10/198:03 pm -
1 stop13h 47m
Deal found 8/26![Frontier logo]()
$248
This FlightHub deal was found by Cheapflights users on 8/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:30 pm -
1 stop8h 09m
Mon 10/57:46 pm -
1 stop13h 49m
Deal found 8/22![Frontier logo]()
$257
This Frontier deal was found by Cheapflights users on 8/23. 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.
Thu 10/11:30 pm -
1 stop8h 09m
Mon 10/57:46 pm -
1 stop13h 49m
Deal found 8/23![Frontier logo]()
$293
This Frontier deal was found by Cheapflights users on 8/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/11:30 pm -
1 stop8h 09m
Sun 10/47:46 pm -
1 stop13h 49m
Deal found 8/22![Frontier logo]()
$295
This FlightHub deal was found by Cheapflights users on 8/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/171:30 pm -
1 stop8h 09m
Mon 10/57:46 pm -
1 stop13h 49m
Deal found 8/24![Frontier logo]()
$302
This HOPEGOO deal was found by Cheapflights users on 8/23. 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 HOPEGOO is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:45 pm -
1 stop8h 20m
Sun 10/258:03 pm -
1 stop13h 47m
Deal found 8/23![Frontier logo]()
$304
This HOPEGOO deal was found by Cheapflights users on 8/26. 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 HOPEGOO is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/161:45 pm -
1 stop8h 23m
Fri 10/238:03 pm -
1 stop13h 47m
Deal found 8/26![Frontier logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:30 pm -
1 stop8h 09m
Mon 10/1912:01 pm -
2 stops19h 32m
Deal found 8/22![Frontier logo]()
$312
This Frontier deal was found by Cheapflights users on 8/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/241:30 pm -
1 stop8h 09m
Mon 10/57:46 pm -
1 stop13h 49m
Deal found 8/26![Frontier logo]()
$317
This Expedia deal was found by Cheapflights users on 8/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/101:30 pm -
1 stop8h 09m
Mon 9/148:11 pm -
1 stop13h 24m
Deal found 8/26![Frontier logo]()
$318
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 August 27, 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 August 27, 2026.
This Delta deal was found by Cheapflights users on 8/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/272:30 pm -
1 stop10h 44m
Tue 2/27:00 am -
1 stop7h 40m
Deal found 8/26![Delta logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 8/25. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/139:35 am -
1 stop10h 28m
Sun 11/155:59 pm -
1 stop9h 31m
Deal found 8/25![Alaska Airlines logo]()
$379
This United Airlines deal was found by Cheapflights users on 8/22. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/121:55 pm -
1 stop11h 04m
Tue 9/156:00 am -
1 stop7h 40m
Deal found 8/22![United Airlines logo]()
$489
This Delta deal was found by Cheapflights users on 8/25. 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.
Thu 11/123:21 pm -
1 stop9h 36m
Mon 11/1611:10 pm -
1 stop8h 28m
Deal found 8/25![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 8/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/106:00 am -
1 stop8h 08m
Sun 12/1311:08 pm -
1 stop7h 20m
Deal found 8/26![Delta logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 8/26. 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.
Fri 9/117:20 am -
1 stop9h 56m
Wed 9/1610:47 am -
1 stop9h 42m
Deal found 8/26![Alaska Airlines logo]()
$419
This Delta deal was found by Cheapflights users on 8/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:00 am -
1 stop8h 08m
Sun 12/1311:08 pm -
1 stop7h 20m
Deal found 8/24![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 8/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:59 pm -
1 stop8h 48m
Sat 9/191:04 pm -
1 stop7h 46m
Deal found 8/23![Delta logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 8/25. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/149:30 am -
1 stop11h 30m
Tue 10/206:02 am -
1 stop9h 27m
Deal found 8/25![Alaska Airlines logo]()
$459
This Alaska Airlines deal was found by Cheapflights users on 8/27. 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 10/227:03 am -
2 stops14h 02m
Sun 10/257:25 am -
1 stop13h 00m
Deal found 8/27![Alaska Airlines logo]()
$487
Last-minute flights from Newark to OntarioDiscover last-minute flight deals from Newark to Ontario. Data last updated August 27, 2026 and is based on user searches.
Discover last-minute flight deals from Newark to Ontario. Data last updated August 27, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 8/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/101:30 pm -
1 stop8h 09m
Mon 9/148:11 pm -
1 stop13h 24m
Deal found 8/26![Frontier logo]()
$318
This Frontier deal was found by Cheapflights users on 8/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/111:30 pm -
1 stop8h 09m
Mon 9/148:11 pm -
1 stop13h 24m
Deal found 8/25![Frontier logo]()
$293
This Frontier deal was found by Cheapflights users on 8/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/111:30 pm -
1 stop8h 09m
Sun 9/137:46 pm -
1 stop13h 49m
Deal found 8/25![Frontier logo]()
$338
This FlightHub deal was found by Cheapflights users on 8/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/171:30 pm -
1 stop8h 09m
Mon 10/57:46 pm -
1 stop13h 49m
Deal found 8/24![Frontier logo]()
$302
This Mytrip deal was found by Cheapflights users on 8/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:55 am -
1 stop13h 23m
Mon 9/287:46 pm -
1 stop13h 49m
Deal found 8/25![Multiple Airlines logo]()
$325
This Frontier deal was found by Cheapflights users on 8/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/241:30 pm -
1 stop8h 09m
Mon 10/57:46 pm -
1 stop13h 49m
Deal found 8/26![Frontier logo]()
$317
This FlightHub deal was found by Cheapflights users on 8/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/241:30 pm -
1 stop8h 09m
Mon 9/287:46 pm -
1 stop13h 49m
Deal found 8/26![Frontier logo]()
$326
This HOPEGOO deal was found by Cheapflights users on 8/26. 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 HOPEGOO is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/251:30 pm -
1 stop8h 09m
Mon 9/287:46 pm -
1 stop13h 49m
Deal found 8/26![Frontier logo]()
$329
This Mytrip deal was found by Cheapflights users on 8/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:50 am -
1 stop13h 28m
Mon 9/287:46 pm -
1 stop13h 49m
Deal found 8/23![Multiple Airlines logo]()
$335
This Gotogate deal was found by Cheapflights users on 8/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:20 am -
1 stop9h 56m
Mon 10/57:46 pm -
1 stop13h 49m
Deal found 8/26![Multiple Airlines logo]()
$319
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 August 27, 2026.
Search for one-way flight options from Newark to Ontario. Find affordable one-way fares based on user searches. Data last updated August 27, 2026.
This Frontier deal was found by Cheapflights users on 8/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/151:45 pm -
1 stop8h 20m
Deal found 8/22![Frontier logo]()
$124
This Frontier deal was found by Cheapflights users on 8/22. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:30 pm -
1 stop8h 09m
Deal found 8/22![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 8/23. 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.
Tue 9/151:30 pm -
2 stops37h 17m
Deal found 8/23![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 8/26. 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.
Fri 9/251:30 pm -
2 stops37h 17m
Deal found 8/26![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 8/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/301:30 pm -
2 stops37h 17m
Deal found 8/24![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:45 pm -
2 stops23h 44m
Deal found 8/22![Frontier logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 8/26. 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.
Wed 9/161:30 pm -
2 stops24h 00m
Deal found 8/26![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 8/26. 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.
Tue 10/2710:14 pm -
2 stops28h 37m
Deal found 8/26![Frontier logo]()
$164
This Trip.com deal was found by Cheapflights users on 8/23. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:55 am -
2 stops31h 34m
Deal found 8/23![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 8/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1310:29 pm -
2 stops28h 21m
Deal found 8/25![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 8/26. 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 10/1910:29 pm -
2 stops28h 21m
Deal found 8/26![Frontier logo]()
$168
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 August 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $257 (FlightHub) |
One-way from | $124 (Frontier) |
Popular in | June |
Cheapest in | November |
Average price | $455 |
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 August 27, 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
Wed 1/27
2:30 pm-10:14 pm
1 stop10h 44m
Ontario
Tue 2/2
7:00 am-5:40 pm
1 stop7h 40m
$379
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Fri 11/13
9:35 am-5:03 pm
1 stop10h 28m
Ontario
Sun 11/15
5:59 pm-6:30 am
1 stop9h 31m
$379
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Thu 11/12
3:21 pm-9:57 pm
1 stop9h 36m
Ontario
Mon 11/16
11:10 pm-10:38 am
1 stop8h 28m
$379
Quickest round-trip
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Thu 12/10
6:00 am-11:08 am
1 stop8h 08m
Ontario
Sun 12/13
11:08 pm-9:28 am
1 stop7h 20m
$379
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Wed 12/9
6:00 am-11:08 am
1 stop8h 08m
Ontario
Sun 12/13
11:08 pm-9:28 am
1 stop7h 20m
$379
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Tue 9/15
5:59 pm-11:47 pm
1 stop8h 48m
Ontario
Sat 9/19
1:04 pm-11:50 pm
1 stop7h 46m
$379
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Fri 9/11
7:20 am-2:16 pm
1 stop9h 56m
Ontario
Wed 9/16
10:47 am-11:29 pm
1 stop9h 42m
$419
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Wed 10/14
9:30 am-6:00 pm
1 stop11h 30m
Ontario
Tue 10/20
6:02 am-6:29 pm
1 stop9h 27m
$459
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Thu 10/22
7:03 am-6:05 pm
2 stops14h 02m
Ontario
Sun 10/25
7:25 am-11:25 pm
1 stop13h 00m
$487
NewarkOntario
EWR Newark - ONT Ontario
EWRONT
Newark
Sat 9/12
1:55 pm-9:59 pm
1 stop11h 04m
Ontario
Tue 9/15
6:00 am-4:40 pm
1 stop7h 40m
$489
Showing 1-10 of 22 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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 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 50 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, November is the cheapest month in which you can book a flight from Newark Airport to Ontario (average of $351). 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 $347 and $738 in October.The cheapest round-trip price found within the last 5 days was $257 on Frontier (Oct 2-Oct 5).
How often are flights from Newark to Ontario delayed?
About 14% of weekly flights between Newark and Ontario have experienced delays in the past year, with the average delay time being 142 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 August 27, 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.
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Reviews
1 / 20
2.0
MediocreBarney,May 2026
JFK - ATL
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Reviews
1 / 20
2.0
MediocreBarney,May 2026
JFK - ATL
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Reviews
1 / 20
2.0
MediocreBarney,May 2026
JFK - ATL
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.8
Reviews
1 / 20
2.0
MediocreBarney,May 2026
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Other flights from Newark
Popular flights
Alternative routes for Newark to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
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 August 27, 2026.
Newark and Ontario flights
Browse other Newark and Ontario flight options. Last updated on August 27, 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 August 27, 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 7,457,451 searches. Data last updated August 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$276 | Average$432 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$286 | Average$419 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$296 | Average$543 | FlexibilityNo cancel fee | On-time69% |