$137+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
EWR — ONT
Jul 7 — Jul 141
Round-trip
1 adult, Economy
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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 June 7, 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 June 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 8/191:30 pm
EWR
- ONT
1 stop30h 18m
Frontier
Sun 8/236:47 pm
ONT
- EWR
1 stop14h 43m
Frontier
Deal found 6/3![Frontier logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 8/2410:29 pm
EWR
- ONT
2 stops38h 36m
Frontier
Mon 8/316:47 pm
ONT
- EWR
1 stop14h 43m
Frontier
Deal found 6/4![Frontier logo]()
$341
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 8/211:30 pm
EWR
- ONT
1 stop30h 18m
Frontier
Tue 8/256:47 pm
ONT
- EWR
1 stop14h 43m
Frontier
Deal found 6/4![Frontier logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 7/2810:29 pm
EWR
- ONT
2 stops38h 35m
Frontier
Tue 8/186:47 pm
ONT
- EWR
1 stop14h 43m
Frontier
Deal found 6/3![Frontier logo]()
$351
This lol.travel deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:00 pm
EWR
- ONT
1 stop9h 54m
Alaska Airlines
Thu 11/196:00 am
ONT
- EWR
1 stop9h 56m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$354
This Kiwi.com deal was found by Cheapflights users on 6/3. 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.
Sat 8/151:35 pm
EWR
- ONT
2 stops13h 15m
Frontier
Sat 8/226:47 pm
ONT
- EWR
1 stop14h 43m
Frontier
Deal found 6/3![Frontier logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 8/1810:29 pm
EWR
- ONT
2 stops28h 20m
Frontier
Tue 9/16:47 pm
ONT
- EWR
1 stop14h 43m
Frontier
Deal found 6/3![Frontier logo]()
$358
This Trip.com deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:20 am
EWR
- ONT
1 stop9h 56m
Alaska Airlines
Wed 9/2310:47 am
ONT
- EWR
1 stop9h 42m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$361
This Kiwi.com deal was found by Cheapflights users on 6/3. 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.
Sat 8/221:30 pm
EWR
- ONT
1 stop30h 18m
Frontier
Mon 8/3110:50 am
ONT
- EWR
2 stops22h 40m
Frontier
Deal found 6/3![Frontier logo]()
$362
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 June 7, 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 June 7, 2026.
This Delta deal was found by Cheapflights users on 6/4. 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 8/126:00 am
EWR
- ONT
1 stop7h 42m
Delta
Mon 8/1710:00 pm
ONT
- EWR
1 stop8h 24m
Delta
Deal found 6/4![Delta logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:20 am
EWR
- ONT
1 stop9h 56m
Alaska Airlines
Wed 9/167:12 am
ONT
- EWR
1 stop13h 17m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$369
This United Airlines deal was found by Cheapflights users on 6/3. 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.
Fri 8/214:55 pm
EWR
- ONT
1 stop8h 40m
United Airlines
Tue 8/259:15 am
ONT
- EWR
1 stop10h 28m
United Airlines
Deal found 6/3![United Airlines logo]()
$479
This Delta deal was found by Cheapflights users on 6/3. 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 9/236:00 am
EWR
- ONT
1 stop7h 47m
Delta
Tue 9/297:05 am
ONT
- EWR
1 stop7h 45m
Delta
Deal found 6/3![Delta logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 6/2. 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.
Wed 9/237:20 am
EWR
- ONT
1 stop9h 56m
Alaska Airlines
Mon 10/56:54 pm
ONT
- EWR
1 stop9h 05m
Alaska Airlines
Deal found 6/2![Alaska Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 6/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:00 am
EWR
- ONT
1 stop7h 47m
Delta
Thu 10/111:59 am
ONT
- EWR
1 stop7h 25m
Delta
Deal found 6/2![Delta logo]()
$404
This Alaska Airlines deal was found by Cheapflights users on 6/3. 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 11/125:41 pm
EWR
- ONT
1 stop9h 08m
Alaska Airlines
Sun 11/154:09 pm
ONT
- EWR
1 stop10h 55m
Alaska Airlines
Deal found 6/3![Alaska Airlines logo]()
$423
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:15 am
EWR
- ONT
1 stop8h 01m
Delta
Sun 8/2310:00 pm
ONT
- EWR
1 stop8h 24m
Delta
Deal found 6/6![Delta logo]()
$414
This Alaska Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:05 pm
EWR
- ONT
1 stop9h 48m
Alaska Airlines
Mon 10/266:54 pm
ONT
- EWR
1 stop19h 07m
Alaska Airlines
Deal found 6/6![Alaska Airlines logo]()
$467
This Delta deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/276:00 am
EWR
- ONT
1 stop7h 40m
Delta
Sun 6/2810:00 pm
ONT
- EWR
1 stop9h 29m
Delta
Deal found 6/5![Delta logo]()
$454
This Alaska Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/75:05 pm
EWR
- ONT
1 stop9h 46m
Alaska Airlines
Wed 7/225:32 pm
ONT
- EWR
1 stop9h 27m
Alaska Airlines
Deal found 6/7![Alaska Airlines logo]()
$483
This Alaska Airlines deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:17 am
EWR
- ONT
1 stop10h 58m
Alaska Airlines
Fri 11/204:00 pm
ONT
- EWR
1 stop11h 04m
Alaska Airlines
Deal found 6/5![Alaska Airlines logo]()
$483
Last-minute flights from Newark to OntarioDiscover last-minute flight deals from Newark to Ontario. Data last updated June 7, 2026 and is based on user searches.
Discover last-minute flight deals from Newark to Ontario. Data last updated June 7, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 6/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/164:31 pm
EWR
- ONT
1 stop9h 40m
Alaska Airlines
Mon 6/299:20 pm
ONT
- EWR
1 stop15h 11m
Alaska Airlines
Deal found 6/2![Alaska Airlines logo]()
$408
This Delta deal was found by Cheapflights users on 6/3. 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.
Sat 6/207:15 am
EWR
- ONT
1 stop7h 55m
Delta
Mon 7/1310:00 pm
ONT
- EWR
1 stop9h 29m
Delta
Deal found 6/3![Delta logo]()
$409
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/2912:05 pm
EWR
- ONT
1 stop9h 25m
Delta
Sun 7/1210:00 pm
ONT
- EWR
1 stop8h 24m
Delta
Deal found 6/6![Delta logo]()
$414
This Delta deal was found by Cheapflights users on 6/4. 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.
Fri 7/33:25 pm
EWR
- ONT
1 stop9h 23m
Delta
Sun 7/1210:00 pm
ONT
- EWR
1 stop8h 24m
Delta
Deal found 6/4![Delta logo]()
$379
This American Airlines deal was found by Cheapflights users on 6/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/45:51 am
EWR
- ONT
1 stop8h 50m
American Airlines
Tue 7/141:11 pm
ONT
- EWR
1 stop7h 48m
American Airlines
Deal found 6/3![American Airlines logo]()
$369
This American Airlines deal was found by Cheapflights users on 6/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/47:15 am
EWR
- ONT
1 stop7h 47m
American Airlines
Fri 7/107:15 pm
ONT
- EWR
1 stop7h 45m
American Airlines
Deal found 6/3![American Airlines logo]()
$370
This American Airlines deal was found by Cheapflights users on 6/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/47:15 am
EWR
- ONT
1 stop7h 47m
American Airlines
Mon 7/137:15 pm
ONT
- EWR
1 stop7h 45m
American Airlines
Deal found 6/7![American Airlines logo]()
$376
This American Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/48:00 am
EWR
- ONT
1 stop8h 20m
American Airlines
Sun 7/127:15 pm
ONT
- EWR
1 stop7h 45m
American Airlines
Deal found 6/6![American Airlines logo]()
$378
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 7/141:35 pm
EWR
- ONT
1 stop22h 02m
Frontier
Sat 7/188:17 am
ONT
- EWR
1 stop25h 14m
Frontier
Deal found 6/2![Frontier logo]()
$397
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 7/2810:29 pm
EWR
- ONT
2 stops38h 35m
Frontier
Tue 8/186:47 pm
ONT
- EWR
1 stop14h 43m
Frontier
Deal found 6/3![Frontier logo]()
$351
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 June 7, 2026.
Search for one-way flight options from Newark to Ontario. Find affordable one-way fares based on user searches. Data last updated June 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 8/1810:29 pm
EWR
- ONT
2 stops28h 20m
Frontier
Deal found 6/3![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 10/275:55 am
EWR
- ONT
2 stops21h 00m
Frontier
Deal found 6/4![Frontier logo]()
$158
This Trip.com deal was found by Cheapflights users on 6/3. 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.
Tue 8/111:35 pm
EWR
- ONT
1 stop22h 06m
Frontier
Deal found 6/3![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 8/141:35 pm
EWR
- ONT
2 stops23h 29m
Frontier
Deal found 6/3![Frontier logo]()
$168
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 7/141:35 pm
EWR
- ONT
2 stops23h 29m
Frontier
Deal found 6/2![Frontier logo]()
$172
This Trip.com deal was found by Cheapflights users on 6/2. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:35 pm
EWR
- ONT
2 stops23h 29m
Frontier
Deal found 6/2![Frontier logo]()
$173
This Kissandfly.com deal was found by Cheapflights users on 6/4. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:20 am
EWR
- ONT
1 stop9h 56m
Alaska Airlines
Deal found 6/4![Alaska Airlines logo]()
$184
This Alaska Airlines deal was found by Cheapflights users on 6/4. 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 8/206:55 am
EWR
- ONT
1 stop10h 34m
Alaska Airlines
Deal found 6/4![Alaska Airlines logo]()
$185
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 June 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $332 (Kiwi.com) |
One-way from | $137 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $605 |
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 June 7, 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 - ONT
EWRONT
Newark
Wed 8/12
6:00 am-10:42 am
1 stop7h 42m
Ontario
Mon 8/17
10:00 pm-9:24 am
1 stop8h 24m
$369
NewarkOntario
EWR - ONT
EWRONT
Newark
Wed 9/9
7:20 am-2:16 pm
1 stop9h 56m
Ontario
Wed 9/16
7:12 am-11:29 pm
1 stop13h 17m
$369
NewarkOntario
EWR - ONT
EWRONT
Newark
Wed 9/23
6:00 am-10:47 am
1 stop7h 47m
Ontario
Tue 9/29
7:05 am-5:50 pm
1 stop7h 45m
$369
NewarkOntario
EWR - ONT
EWRONT
Newark
Wed 9/23
7:20 am-2:16 pm
1 stop9h 56m
Ontario
Mon 10/5
6:54 pm-6:59 am
1 stop9h 05m
$369
Quickest round-trip
NewarkOntario
EWR - ONT
EWRONT
Newark
Wed 9/23
6:00 am-10:47 am
1 stop7h 47m
Ontario
Thu 10/1
11:59 am-10:24 pm
1 stop7h 25m
$404
NewarkOntario
EWR - ONT
EWRONT
Newark
Wed 8/19
7:15 am-12:16 pm
1 stop8h 01m
Ontario
Sun 8/23
10:00 pm-9:24 am
1 stop8h 24m
$414
NewarkOntario
EWR - ONT
EWRONT
Newark
Thu 11/12
5:41 pm-11:49 pm
1 stop9h 08m
Ontario
Sun 11/15
4:09 pm-6:04 am
1 stop10h 55m
$423
NewarkOntario
EWR - ONT
EWRONT
Newark
Sat 6/27
6:00 am-10:40 am
1 stop7h 40m
Ontario
Sun 6/28
10:00 pm-10:29 am
1 stop9h 29m
$454
NewarkOntario
EWR - ONT
EWRONT
Newark
Fri 10/23
5:05 pm-11:53 pm
1 stop9h 48m
Ontario
Mon 10/26
6:54 pm-5:01 pm
1 stop19h 07m
$467
NewarkOntario
EWR - ONT
EWRONT
Newark
Fri 8/21
4:55 pm-10:35 pm
1 stop8h 40m
Ontario
Tue 8/25
9:15 am-10:43 pm
1 stop10h 28m
$479
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 June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star |
- 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 18 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, September is the cheapest month in which you can book a flight from Newark Airport to Ontario (average of $296). Flying from Newark Airport to Ontario in June is currently the most expensive (average of $605). 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?
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 144 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 June 7, 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.
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreBarney,May 2026
JFK - ATL
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreBarney,May 2026
JFK - ATL
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreBarney,May 2026
JFK - ATL
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Boarding
8.1
Overall
7.9
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.
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Other flights to Ontario
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Top 3 airlines flying from Newark to Ontario
Discover the top 3 airlines that operate flights from Newark to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$276 | Average$418 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$276 | Average$376 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$296 | Average$519 | FlexibilityNo cancel fee | On-time69% |