$125+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
EWR — ONT
Jun 15 — Jun 221
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
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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 May 16, 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 May 16, 2026.
This Expedia deal was found by Cheapflights users on 5/12. 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.
Wed 6/31:30 pm
EWR
- ONT
1 stop8h 41m
Multiple Airlines
Fri 6/57:41 pm
ONT
- EWR
1 stop18h 15m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$310
This Delta deal was found by Cheapflights users on 5/12. 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 9/256:55 pm
EWR
- ONT
1 stop7h 49m
Delta
Fri 10/25:05 pm
ONT
- EWR
1 stop10h 03m
Delta
Deal found 5/12![Delta logo]()
$317
This American Airlines deal was found by Cheapflights users on 5/11. 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.
Wed 9/1610:52 am
EWR
- ONT
1 stop7h 04m
American Airlines
Tue 9/228:02 pm
ONT
- EWR
1 stop6h 29m
American Airlines
Deal found 5/11![American Airlines logo]()
$318
This Expedia deal was found by Cheapflights users on 5/11. 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.
Fri 5/291:30 pm
EWR
- ONT
1 stop8h 41m
Multiple Airlines
Tue 6/27:41 pm
ONT
- EWR
1 stop18h 15m
Multiple Airlines
Deal found 5/11![Multiple Airlines logo]()
$320
This American Airlines deal was found by Cheapflights users on 5/12. 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 6/65:01 am
EWR
- ONT
2 stops10h 03m
American Airlines
Mon 6/811:59 pm
ONT
- EWR
1 stop8h 32m
American Airlines
Deal found 5/12![American Airlines logo]()
$322
This Alaska Airlines deal was found by Cheapflights users on 5/12. 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 10/165:05 pm
EWR
- ONT
1 stop9h 48m
Alaska Airlines
Sat 10/246:54 pm
ONT
- EWR
1 stop9h 05m
Alaska Airlines
Deal found 5/12![Alaska Airlines logo]()
$338
This Expedia deal was found by Cheapflights users on 5/12. 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.
Fri 5/291:30 pm
EWR
- ONT
1 stop8h 41m
Multiple Airlines
Fri 6/57:41 pm
ONT
- EWR
1 stop18h 15m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$340
This American Airlines deal was found by Cheapflights users on 5/14. 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.
Wed 9/91:42 pm
EWR
- ONT
1 stop9h 13m
American Airlines
Wed 9/168:02 pm
ONT
- EWR
2 stops10h 51m
American Airlines
Deal found 5/14![American Airlines logo]()
$342
This American Airlines deal was found by Cheapflights users on 5/11. 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.
Tue 6/21:30 pm
EWR
- ONT
2 stops11h 27m
American Airlines
Tue 6/97:00 am
ONT
- EWR
2 stops12h 08m
American Airlines
Deal found 5/11![American Airlines logo]()
$348
This American Airlines deal was found by Cheapflights users on 5/14. 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.
Wed 12/29:51 am
EWR
- ONT
2 stops11h 28m
American Airlines
Sun 12/67:30 pm
ONT
- EWR
2 stops11h 06m
American Airlines
Deal found 5/14![American Airlines logo]()
$353
This Trip.com deal was found by Cheapflights users on 5/15. 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 10/179:30 am
EWR
- ONT
1 stop11h 30m
Alaska Airlines
Wed 10/216:54 pm
ONT
- EWR
1 stop9h 05m
Alaska Airlines
Deal found 5/15![Alaska Airlines logo]()
$356
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 May 16, 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 May 16, 2026.
This Alaska Airlines deal was found by Cheapflights users on 5/12. 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 10/165:05 pm
EWR
- ONT
1 stop9h 48m
Alaska Airlines
Tue 10/206:54 pm
ONT
- EWR
1 stop9h 05m
Alaska Airlines
Deal found 5/12![Alaska Airlines logo]()
$338
This Delta deal was found by Cheapflights users on 5/13. 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 10/2212:05 pm
EWR
- ONT
1 stop9h 13m
Delta
Sun 10/255:05 pm
ONT
- EWR
1 stop9h 59m
Delta
Deal found 5/13![Delta logo]()
$343
This KAYAK deal was found by Cheapflights users on 5/12. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/95:26 pm
EWR
- ONT
1 stop9h 33m
American Airlines
Thu 6/111:11 pm
ONT
- EWR
1 stop7h 48m
American Airlines
Deal found 5/12![American Airlines logo]()
$454
This Alaska Airlines deal was found by Cheapflights users on 5/15. 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 9/227:20 am
EWR
- ONT
1 stop9h 58m
Alaska Airlines
Sat 9/2610:45 am
ONT
- EWR
1 stop9h 44m
Alaska Airlines
Deal found 5/15![Alaska Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 5/11. 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 stop7h 50m
Delta
Sun 8/2310:00 pm
ONT
- EWR
1 stop9h 29m
Delta
Deal found 5/11![Delta logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 5/13. 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 9/297:20 am
EWR
- ONT
1 stop9h 58m
Alaska Airlines
Fri 10/166:54 pm
ONT
- EWR
1 stop9h 05m
Alaska Airlines
Deal found 5/13![Alaska Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 5/14. 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 6/2612:05 pm
EWR
- ONT
1 stop9h 25m
Delta
Tue 6/306:00 am
ONT
- EWR
1 stop7h 49m
Delta
Deal found 5/14![Delta logo]()
$398
This Alaska Airlines deal was found by Cheapflights users on 5/11. 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 5/297:30 am
EWR
- ONT
1 stop10h 39m
Alaska Airlines
Tue 6/27:41 pm
ONT
- EWR
1 stop18h 15m
Alaska Airlines
Deal found 5/11![Alaska Airlines logo]()
$403
This Alaska Airlines deal was found by Cheapflights users on 5/14. 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.
Sun 9/207:20 am
EWR
- ONT
1 stop9h 58m
Alaska Airlines
Tue 9/2210:45 am
ONT
- EWR
1 stop9h 44m
Alaska Airlines
Deal found 5/14![Alaska Airlines logo]()
$418
This Alaska Airlines deal was found by Cheapflights users on 5/15. 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.
Sun 9/207:20 am
EWR
- ONT
1 stop9h 58m
Alaska Airlines
Mon 9/2110:45 am
ONT
- EWR
1 stop9h 44m
Alaska Airlines
Deal found 5/15![Alaska Airlines logo]()
$418
This Alaska Airlines deal was found by Cheapflights users on 5/15. 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 5/309:30 am
EWR
- ONT
1 stop12h 32m
Alaska Airlines
Tue 6/24:03 pm
ONT
- EWR
1 stop11h 49m
Alaska Airlines
Deal found 5/15![Alaska Airlines logo]()
$477
This Alaska Airlines deal was found by Cheapflights users on 5/11. 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 8/45:05 pm
EWR
- ONT
1 stop9h 47m
Alaska Airlines
Sat 8/155:32 pm
ONT
- EWR
1 stop9h 27m
Alaska Airlines
Deal found 5/11![Alaska Airlines logo]()
$477
Last-minute flights from Newark to OntarioDiscover last-minute flight deals from Newark to Ontario. Data last updated May 16, 2026 and is based on user searches.
Discover last-minute flight deals from Newark to Ontario. Data last updated May 16, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 5/11. 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.
Fri 5/291:30 pm
EWR
- ONT
1 stop8h 41m
Multiple Airlines
Tue 6/27:41 pm
ONT
- EWR
1 stop18h 15m
Multiple Airlines
Deal found 5/11![Multiple Airlines logo]()
$320
This Expedia deal was found by Cheapflights users on 5/12. 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.
Fri 5/291:30 pm
EWR
- ONT
1 stop8h 41m
Multiple Airlines
Fri 6/57:41 pm
ONT
- EWR
1 stop18h 15m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$340
This CheapOair deal was found by Cheapflights users on 5/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:29 pm
EWR
- ONT
1 stop19h 43m
Alaska Airlines
Tue 6/97:41 pm
ONT
- EWR
1 stop16h 50m
Alaska Airlines
Deal found 5/11![Alaska Airlines logo]()
$338
This American Airlines deal was found by Cheapflights users on 5/11. 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.
Tue 6/21:30 pm
EWR
- ONT
2 stops11h 27m
American Airlines
Tue 6/97:00 am
ONT
- EWR
2 stops12h 08m
American Airlines
Deal found 5/11![American Airlines logo]()
$348
This Delta deal was found by Cheapflights users on 5/11. 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 6/23:28 pm
EWR
- ONT
1 stop9h 20m
Delta
Sun 6/710:00 pm
ONT
- EWR
1 stop8h 26m
Delta
Deal found 5/11![Delta logo]()
$377
This Expedia deal was found by Cheapflights users on 5/12. 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.
Wed 6/31:30 pm
EWR
- ONT
1 stop8h 41m
Multiple Airlines
Fri 6/57:41 pm
ONT
- EWR
1 stop18h 15m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$310
This Alaska Airlines deal was found by Cheapflights users on 5/13. 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 6/36:29 pm
EWR
- ONT
1 stop19h 41m
Alaska Airlines
Wed 6/107:00 am
ONT
- EWR
1 stop19h 59m
Alaska Airlines
Deal found 5/13![Alaska Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 5/13. 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 6/44:29 pm
EWR
- ONT
1 stop8h 19m
Delta
Sun 6/710:00 pm
ONT
- EWR
1 stop9h 29m
Delta
Deal found 5/13![Delta logo]()
$343
This Delta deal was found by Cheapflights users on 5/11. 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 6/53:28 pm
EWR
- ONT
1 stop9h 20m
Delta
Mon 6/810:00 pm
ONT
- EWR
1 stop8h 26m
Delta
Deal found 5/11![Delta logo]()
$317
This Delta deal was found by Cheapflights users on 5/13. 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 6/512:05 pm
EWR
- ONT
1 stop9h 31m
Delta
Sun 6/710:00 pm
ONT
- EWR
1 stop8h 26m
Delta
Deal found 5/13![Delta logo]()
$364
This American Airlines deal was found by Cheapflights users on 5/12. 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 6/65:01 am
EWR
- ONT
2 stops10h 03m
American Airlines
Mon 6/811:59 pm
ONT
- EWR
1 stop8h 32m
American Airlines
Deal found 5/12![American Airlines logo]()
$322
This United Airlines deal was found by Cheapflights users on 5/12. 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 6/96:00 am
EWR
- ONT
1 stop9h 12m
United Airlines
Tue 6/161:18 pm
ONT
- EWR
1 stop8h 46m
United Airlines
Deal found 5/12![United Airlines logo]()
$368
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 May 16, 2026.
Search for one-way flight options from Newark to Ontario. Find affordable one-way fares based on user searches. Data last updated May 16, 2026.
This Frontier deal was found by Cheapflights users on 5/12. 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.
Wed 6/31:30 pm
EWR
- ONT
1 stop8h 41m
Frontier
Deal found 5/12![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 5/13. 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
EWR
- ONT
2 stops27h 27m
Frontier
Deal found 5/13![Frontier logo]()
$131
This Expedia deal was found by Cheapflights users on 5/12. 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.
Fri 5/291:30 pm
EWR
- ONT
1 stop8h 41m
Frontier
Deal found 5/12![Frontier logo]()
$135
This Mytrip deal was found by Cheapflights users on 5/12. 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 5/281:30 pm
EWR
- ONT
1 stop8h 41m
Frontier
Deal found 5/12![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 5/13. 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 10/101:22 pm
EWR
- ONT
2 stops13h 33m
Frontier
Deal found 5/13![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 5/13. 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 8/1710:29 pm
EWR
- ONT
2 stops38h 36m
Frontier
Deal found 5/13![Frontier logo]()
$144
This Frontier deal was found by Cheapflights users on 5/11. 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.
Wed 5/271:30 pm
EWR
- ONT
1 stop8h 41m
Frontier
Deal found 5/11![Frontier logo]()
$156
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 May 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $310 (Expedia) |
One-way from | $125 (Frontier) |
Popular in | June |
Cheapest in | September |
Average price | $391 |
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 May 16, 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
Fri 10/16
5:05 pm-11:53 pm
1 stop9h 48m
Ontario
Tue 10/20
6:54 pm-6:59 am
1 stop9h 05m
$338
NewarkOntario
EWR - ONT
EWRONT
Newark
Thu 10/22
12:05 pm-6:18 pm
1 stop9h 13m
Ontario
Sun 10/25
5:05 pm-6:04 am
1 stop9h 59m
$343
NewarkOntario
EWR - ONT
EWRONT
Newark
Tue 9/22
7:20 am-2:18 pm
1 stop9h 58m
Ontario
Sat 9/26
10:45 am-11:29 pm
1 stop9h 44m
$359
NewarkOntario
EWR - ONT
EWRONT
Newark
Tue 9/29
7:20 am-2:18 pm
1 stop9h 58m
Ontario
Fri 10/16
6:54 pm-6:59 am
1 stop9h 05m
$359
NewarkOntario
EWR - ONT
EWRONT
Newark
Wed 8/19
7:15 am-12:05 pm
1 stop7h 50m
Ontario
Sun 8/23
10:00 pm-10:29 am
1 stop9h 29m
$377
Quickest round-trip
NewarkOntario
EWR - ONT
EWRONT
Newark
Fri 6/26
12:05 pm-6:30 pm
1 stop9h 25m
Ontario
Tue 6/30
6:00 am-4:49 pm
1 stop7h 49m
$398
NewarkOntario
EWR - ONT
EWRONT
Newark
Fri 5/29
7:30 am-3:09 pm
1 stop10h 39m
Ontario
Tue 6/2
7:41 pm-4:56 pm
1 stop18h 15m
$403
NewarkOntario
EWR - ONT
EWRONT
Newark
Sun 9/20
7:20 am-2:18 pm
1 stop9h 58m
Ontario
Tue 9/22
10:45 am-11:29 pm
1 stop9h 44m
$418
NewarkOntario
EWR - ONT
EWRONT
Newark
Sun 9/20
7:20 am-2:18 pm
1 stop9h 58m
Ontario
Mon 9/21
10:45 am-11:29 pm
1 stop9h 44m
$418
NewarkOntario
EWR - ONT
EWRONT
Newark
Tue 6/9
5:26 pm-11:59 pm
1 stop9h 33m
Ontario
Thu 6/11
1:11 pm-11:59 pm
1 stop7h 48m
$454
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 May.
| 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 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.
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 May 16, 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.
Entertainment
7.8
Food
7.2
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreBarney,May 2026
JFK - ATL
Entertainment
7.8
Food
7.2
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreBarney,May 2026
JFK - ATL
Entertainment
7.8
Food
7.2
Boarding
8.1
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
2.0
MediocreBarney,May 2026
JFK - ATL
Entertainment
7.8
Food
7.2
Boarding
8.1
Comfort
7.8
Crew
8.5
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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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 May 16, 2026.
Newark and Ontario flights
Browse other Newark and Ontario flight options. Last updated on May 16, 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 May 16, 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 May 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$276 | Average$363 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$276 | Average$418 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$291 | Average$510 | FlexibilityNo cancel fee | On-time69% |