$95+ 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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
EWR — ONT
Mar 27 — Apr 31
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 February 25, 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 February 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/22. 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.
Tue 4/1410:15 pm
EWR
- ONT
1 stop15h 29m
Multiple Airlines
Sun 4/198:21 am
ONT
- EWR
1 stop24h 15m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1410:15 pm
EWR
- ONT
1 stop15h 29m
Multiple Airlines
Fri 4/178:59 pm
ONT
- EWR
2 stops20h 25m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 2/22. 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.
Tue 3/2410:54 pm
EWR
- ONT
2 stops35h 18m
Multiple Airlines
Tue 3/314:00 pm
ONT
- EWR
1 stop23h 54m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$269
This Kiwi.com deal was found by Cheapflights users on 2/23. 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.
Sat 5/212:41 pm
EWR
- ONT
1 stop30h 36m
Multiple Airlines
Sat 5/911:44 am
ONT
- EWR
2 stops14h 46m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$270
This United Airlines deal was found by Cheapflights users on 2/22. 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.
Tue 4/74:05 pm
EWR
- ONT
1 stop8h 45m
United Airlines
Tue 4/1411:05 am
ONT
- EWR
1 stop9h 12m
United Airlines
Deal found 2/22![United Airlines logo]()
$272
This Kiwi.com deal was found by Cheapflights users on 2/22. 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.
Thu 4/239:00 pm
EWR
- ONT
2 stops22h 38m
Multiple Airlines
Sun 5/38:21 am
ONT
- EWR
1 stop24h 15m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$275
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/152:10 pm
EWR
- ONT
1 stop9h 26m
United Airlines
Sat 4/186:49 pm
ONT
- EWR
1 stop8h 04m
United Airlines
Deal found 2/20![United Airlines logo]()
$277
This Delta deal was found by Cheapflights users on 2/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:30 pm
EWR
- ONT
1 stop8h 14m
Delta
Tue 4/216:00 am
ONT
- EWR
2 stops10h 30m
Delta
Deal found 2/22![Delta logo]()
$282
This Kiwi.com deal was found by Cheapflights users on 2/23. 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.
Thu 4/239:00 pm
EWR
- ONT
2 stops22h 38m
Multiple Airlines
Mon 4/276:15 am
ONT
- EWR
1 stop9h 21m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$284
This Kiwi.com deal was found by Cheapflights users on 2/23. 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.
Wed 3/1112:02 pm
EWR
- ONT
2 stops28h 09m
Multiple Airlines
Tue 3/174:00 pm
ONT
- EWR
1 stop23h 54m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$287
This American Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/249:54 am
EWR
- ONT
2 stops12h 15m
American Airlines
Wed 3/257:59 pm
ONT
- EWR
2 stops10h 36m
American Airlines
Deal found 2/21![American Airlines logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/134:12 pm
EWR
- ONT
1 stop9h 56m
Multiple Airlines
Fri 4/178:26 am
ONT
- EWR
2 stops34h 03m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$290
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 February 25, 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 February 25, 2026.
This Alaska Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/283:30 pm
EWR
- ONT
1 stop10h 02m
Alaska Airlines
Tue 5/510:39 am
ONT
- EWR
1 stop9h 50m
Alaska Airlines
Deal found 2/20![Alaska Airlines logo]()
$277
This United Airlines deal was found by Cheapflights users on 2/22. 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 4/182:30 pm
EWR
- ONT
1 stop11h 15m
United Airlines
Wed 4/226:05 am
ONT
- EWR
1 stop9h 17m
United Airlines
Deal found 2/22![United Airlines logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/147:30 am
EWR
- ONT
1 stop19h 02m
Alaska Airlines
Tue 3/174:02 pm
ONT
- EWR
1 stop11h 57m
Alaska Airlines
Deal found 2/20![Alaska Airlines logo]()
$356
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/174:05 pm
EWR
- ONT
1 stop8h 45m
United Airlines
Wed 4/226:05 am
ONT
- EWR
1 stop10h 24m
United Airlines
Deal found 2/21![United Airlines logo]()
$403
This Alaska Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/125:30 pm
EWR
- ONT
1 stop9h 22m
Alaska Airlines
Fri 3/136:14 am
ONT
- EWR
1 stop9h 14m
Alaska Airlines
Deal found 2/20![Alaska Airlines logo]()
$387
This Alaska Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/95:30 pm
EWR
- ONT
1 stop9h 22m
Alaska Airlines
Tue 3/174:02 pm
ONT
- EWR
1 stop11h 57m
Alaska Airlines
Deal found 2/23![Alaska Airlines logo]()
$387
This Alaska Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/115:30 pm
EWR
- ONT
1 stop9h 22m
Alaska Airlines
Sat 3/146:14 am
ONT
- EWR
1 stop14h 15m
Alaska Airlines
Deal found 2/20![Alaska Airlines logo]()
$395
This United Airlines deal was found by Cheapflights users on 2/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/84:45 pm
EWR
- ONT
1 stop8h 33m
United Airlines
Mon 3/1611:59 pm
ONT
- EWR
1 stop7h 18m
United Airlines
Deal found 2/23![United Airlines logo]()
$478
This Alaska Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/85:33 pm
EWR
- ONT
1 stop9h 15m
Alaska Airlines
Sun 5/1010:39 am
ONT
- EWR
1 stop9h 50m
Alaska Airlines
Deal found 2/20![Alaska Airlines logo]()
$423
This Alaska Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/267:29 am
EWR
- ONT
1 stop10h 03m
Alaska Airlines
Fri 5/17:59 pm
ONT
- EWR
1 stop15h 31m
Alaska Airlines
Deal found 2/21![Alaska Airlines logo]()
$430
This Alaska Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/105:30 pm
EWR
- ONT
1 stop9h 22m
Alaska Airlines
Sun 3/156:14 am
ONT
- EWR
1 stop14h 15m
Alaska Airlines
Deal found 2/23![Alaska Airlines logo]()
$495
This Alaska Airlines deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/275:30 pm
EWR
- ONT
1 stop9h 22m
Alaska Airlines
Mon 3/26:14 am
ONT
- EWR
1 stop9h 14m
Alaska Airlines
Deal found 2/22![Alaska Airlines logo]()
$498
Last-minute flights from Newark to OntarioDiscover last-minute flight deals from Newark to Ontario. Data last updated February 25, 2026 and is based on user searches.
Discover last-minute flight deals from Newark to Ontario. Data last updated February 25, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 2/22. 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 3/610:30 pm
EWR
- ONT
2 stops22h 09m
Multiple Airlines
Mon 3/95:10 pm
ONT
- EWR
1 stop21h 44m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 2/23. 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.
Wed 3/1112:02 pm
EWR
- ONT
2 stops28h 09m
Multiple Airlines
Tue 3/174:00 pm
ONT
- EWR
1 stop23h 54m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$287
This Alaska Airlines deal was found by Cheapflights users on 2/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/115:30 pm
EWR
- ONT
1 stop9h 22m
Alaska Airlines
Tue 3/246:00 am
ONT
- EWR
1 stop9h 29m
Alaska Airlines
Deal found 2/24![Alaska Airlines logo]()
$332
This Delta deal was found by Cheapflights users on 2/24. 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.
Tue 3/177:00 am
EWR
- ONT
1 stop8h 23m
Delta
Tue 3/1710:25 pm
ONT
- EWR
1 stop8h 07m
Delta
Deal found 2/24![Delta logo]()
$277
This Alaska Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/175:30 pm
EWR
- ONT
1 stop9h 22m
Alaska Airlines
Wed 3/256:00 am
ONT
- EWR
1 stop20h 58m
Alaska Airlines
Deal found 2/21![Alaska Airlines logo]()
$310
This United Airlines deal was found by Cheapflights users on 2/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/172:30 pm
EWR
- ONT
1 stop10h 48m
United Airlines
Thu 3/1911:59 pm
ONT
- EWR
1 stop7h 18m
United Airlines
Deal found 2/23![United Airlines logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/2310:30 pm
EWR
- ONT
2 stops19h 35m
Multiple Airlines
Mon 3/305:20 pm
ONT
- EWR
1 stop22h 34m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 2/22. 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.
Tue 3/2410:54 pm
EWR
- ONT
2 stops35h 18m
Multiple Airlines
Tue 3/314:00 pm
ONT
- EWR
1 stop23h 54m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$269
This American Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2410:25 am
EWR
- ONT
1 stop8h 57m
American Airlines
Wed 3/257:59 pm
ONT
- EWR
2 stops10h 36m
American Airlines
Deal found 2/21![American Airlines logo]()
$282
This Kiwi.com deal was found by Cheapflights users on 2/23. 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.
Wed 3/254:12 pm
EWR
- ONT
1 stop27h 03m
Multiple Airlines
Wed 4/110:03 pm
ONT
- EWR
2 stops10h 26m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$307
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 February 25, 2026.
Search for one-way flight options from Newark to Ontario. Find affordable one-way fares based on user searches. Data last updated February 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 4/145:50 am
EWR
- ONT
2 stops21h 05m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$95
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 4/219:20 am
EWR
- ONT
2 stops17h 35m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$104
This Kiwi.com deal was found by Cheapflights users on 2/22. 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.
Mon 3/2310:54 pm
EWR
- ONT
2 stops41h 34m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 2/23. 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.
Mon 4/205:59 am
EWR
- ONT
2 stops44h 56m
Frontier
Deal found 2/23![Frontier logo]()
$113
This Kiwi.com deal was found by Cheapflights users on 2/24. 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.
Tue 4/710:54 pm
EWR
- ONT
2 stops28h 02m
Multiple Airlines
Deal found 2/24![Multiple Airlines logo]()
$116
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 3/1012:02 pm
EWR
- ONT
2 stops36h 01m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 2/22. 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 4/299:20 am
EWR
- ONT
2 stops17h 35m
Multiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 2/23. 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.
Wed 4/16:55 am
EWR
- ONT
2 stops20h 01m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$128
This Trip.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/219:00 am
EWR
- ONT
1 stop12h 13m
Hawaiian Airlines
Deal found 2/21![Hawaiian Airlines logo]()
$130
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 February 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $254 (Kiwi.com) |
One-way from | $95 (Kiwi.com) |
Popular in | December |
Cheapest in | September |
Average price | $408 |
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 February 25, 2026.
Use the filters below to find and compare flights from Newark Airport to Ontario that are best for you.
Fly from
Newark
Fly to
Ontario
Route
Depart
Return
Price
NewarkOntario
EWR - ONT
EWRONT
Newark
Tue 4/28
3:30 pm-10:32 pm
1 stop10h 02m
Ontario
Tue 5/5
10:39 am-11:29 pm
1 stop9h 50m
$277
NewarkOntario
EWR - ONT
EWRONT
Newark
Sat 3/14
7:30 am-11:32 pm
1 stop19h 02m
Ontario
Tue 3/17
4:02 pm-6:59 am
1 stop11h 57m
$356
NewarkOntario
EWR - ONT
EWRONT
Newark
Sat 4/18
2:30 pm-10:45 pm
1 stop11h 15m
Ontario
Wed 4/22
6:05 am-6:22 pm
1 stop9h 17m
$377
NewarkOntario
EWR - ONT
EWRONT
Newark
Thu 3/12
5:30 pm-11:52 pm
1 stop9h 22m
Ontario
Fri 3/13
6:14 am-6:28 pm
1 stop9h 14m
$387
NewarkOntario
EWR - ONT
EWRONT
Newark
Mon 3/9
5:30 pm-11:52 pm
1 stop9h 22m
Ontario
Tue 3/17
4:02 pm-6:59 am
1 stop11h 57m
$387
NewarkOntario
EWR - ONT
EWRONT
Newark
Wed 3/11
5:30 pm-11:52 pm
1 stop9h 22m
Ontario
Sat 3/14
6:14 am-11:29 pm
1 stop14h 15m
$395
NewarkOntario
EWR - ONT
EWRONT
Newark
Fri 4/17
4:05 pm-9:50 pm
1 stop8h 45m
Ontario
Wed 4/22
6:05 am-7:29 pm
1 stop10h 24m
$403
NewarkOntario
EWR - ONT
EWRONT
Newark
Fri 5/8
5:33 pm-11:48 pm
1 stop9h 15m
Ontario
Sun 5/10
10:39 am-11:29 pm
1 stop9h 50m
$423
NewarkOntario
EWR - ONT
EWRONT
Newark
Sun 4/26
7:29 am-2:32 pm
1 stop10h 03m
Ontario
Fri 5/1
7:59 pm-2:30 pm
1 stop15h 31m
$430
NewarkOntario
EWR - ONT
EWRONT
Newark
Sun 3/8
4:45 pm-10:18 pm
1 stop8h 33m
Ontario
Mon 3/16
11:59 pm-10:17 am
1 stop7h 18m
$478
Showing 1-10 of 24 results
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 February.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | 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
How far ahead should I book a flight from Newark Airport to Ontario?
Use this chart to determine the optimal time to book a round-trip flight from Newark to Ontario. Price data was last updated on February 20, 2026.
The best time to book flights from Newark Airport to Ontario is 33 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Newark Airport to Ontario?
Currently, August is the cheapest month in which you can book a flight from Newark Airport to Ontario (average of $90). Flying from Newark Airport to Ontario in December is currently the most expensive (average of $155). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How often are flights from Newark to Ontario delayed?
About 16% of weekly flights between Newark and Ontario have experienced delays in the past year, with the average delay time being 136 minutes.
What is the most punctual flight time for Newark to Ontario flights?
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated February 25, 2026.
Get a feel of what it's like to fly with Delta, United Airlines, and American 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.
Food
7.2
Crew
8.5
Boarding
8.1
Overall
7.9
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentKymberlee,Oct 2024
JFK - ATL
Food
7.2
Crew
8.5
Boarding
8.1
Overall
7.9
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentKymberlee,Oct 2024
JFK - ATL
Food
7.2
Crew
8.5
Boarding
8.1
Overall
7.9
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentKymberlee,Oct 2024
JFK - ATL
Food
7.2
Crew
8.5
Boarding
8.1
Overall
7.9
Entertainment
7.8
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentKymberlee,Oct 2024
JFK - ATL
Related info for your journey
Find useful and relevant information for your journey from Newark to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Newark to Ontario
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Complete your trip
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 February 25, 2026.
Newark and Ontario flights
Browse other Newark and Ontario flight options. Last updated on February 25, 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 February 25, 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 February 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$275 | Average$356 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$276 | Average$418 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$394 | FlexibilityNo cancel fee | On-time69% |