$58+ Cheap flights from San Jose, CA to Ontario (SJC - ONT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/26. Fares are subject to change and may not be available on all flights or dates of travel.
SJC — ONT
Oct 28 — Nov 41
Round-trip
1 adult, Economy
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Find cheap flights from San Jose to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from San Jose to Ontario are usually found in September or October, booked 68 days in advance, depart on a Thursday or Saturday and return on a Thursday
Cheap flight deals from San Jose to Ontario
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Jose to OntarioExplore the most affordable flight options available from San Jose to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2026.
Explore the most affordable flight options available from San Jose to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2026.
This Southwest deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:35 pm -
1 stop6h 15m
Sat 10/2411:30 am -
Nonstop1h 10m
Deal found 9/27![Southwest logo]()
$127
This CheapOair deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:02 pm -
1 stop13h 29m
Wed 10/215:25 pm -
1 stop19h 55m
Deal found 9/26![Frontier logo]()
$128
This Flightnetwork deal was found by Cheapflights users on 9/23. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:02 pm -
1 stop10h 02m
Thu 10/298:35 pm -
1 stop17h 11m
Deal found 9/23![Frontier logo]()
$129
This FlightHub deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/269:02 pm -
1 stop12h 38m
Thu 10/298:35 pm -
1 stop17h 11m
Deal found 9/27![Frontier logo]()
$133
This Expedia deal was found by Cheapflights users on 9/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/192:41 pm -
1 stop16h 26m
Mon 11/232:01 pm -
1 stop25h 29m
Deal found 9/24![Frontier logo]()
$135
This Southwest deal was found by Cheapflights users on 9/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:20 am -
1 stop5h 05m
Mon 10/266:55 pm -
1 stop5h 00m
Deal found 9/24![Southwest logo]()
$137
This Southwest deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:05 pm -
2 stops6h 35m
Mon 10/266:55 pm -
1 stop5h 00m
Deal found 9/28![Southwest logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:02 pm -
1 stop13h 29m
Wed 10/285:07 pm -
1 stop20h 39m
Deal found 9/28![Frontier logo]()
$143
This Southwest deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:30 am -
Nonstop1h 15m
Mon 11/93:55 pm -
Nonstop1h 20m
Deal found 9/28![Southwest logo]()
$144
This Southwest deal was found by Cheapflights users on 9/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:00 am -
2 stops6h 55m
Tue 10/274:15 pm -
2 stops6h 35m
Deal found 9/24![Southwest logo]()
$147
Best flights from San Jose to OntarioDiscover carefully curated flight deals from San Jose to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 28, 2026.
Discover carefully curated flight deals from San Jose to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 28, 2026.
This Southwest deal was found by Cheapflights users on 9/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:30 am -
Nonstop1h 15m
Mon 11/233:55 pm -
Nonstop1h 20m
Deal found 9/24![Southwest logo]()
$144
This United Airlines deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/241:00 pm -
1 stop7h 58m
Thu 10/295:00 am -
1 stop8h 18m
Deal found 9/28![United Airlines logo]()
$316
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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.
Tue 10/209:15 am -
2 stops7h 50m
Wed 10/285:45 pm -
2 stops17h 35m
Deal found 9/24![Alaska Airlines logo]()
$394
This Southwest deal was found by Cheapflights users on 9/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:45 am -
Nonstop1h 20m
Sun 10/256:10 am -
1 stop5h 05m
Deal found 9/23![Southwest logo]()
$275
This Southwest deal was found by Cheapflights users on 9/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/132:40 pm -
1 stop6h 45m
Tue 10/204:15 pm -
1 stop3h 25m
Deal found 9/23![Southwest logo]()
$298
This Southwest deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/148:40 am -
2 stops7h 00m
Fri 10/166:00 am -
Nonstop1h 15m
Deal found 9/25![Southwest logo]()
$320
This Southwest deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/303:30 pm -
2 stops6h 45m
Sun 11/112:10 pm -
2 stops5h 45m
Deal found 9/28![Southwest logo]()
$342
This United Airlines deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/118:45 am -
1 stop12h 06m
Wed 11/185:00 am -
1 stop8h 18m
Deal found 9/27![United Airlines logo]()
$487
This Southwest deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/102:00 pm -
1 stop4h 00m
Wed 10/146:25 pm -
Nonstop1h 10m
Deal found 9/25![Southwest logo]()
$459
This Southwest deal was found by Cheapflights users on 9/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:15 am -
1 stop4h 55m
Sat 10/103:10 pm -
1 stop6h 00m
Deal found 9/23![Southwest logo]()
$459
Last-minute flights from San Jose to OntarioDiscover last-minute flight deals from San Jose to Ontario. Data last updated September 28, 2026 and is based on user searches.
Discover last-minute flight deals from San Jose to Ontario. Data last updated September 28, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 9/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:02 pm -
1 stop13h 29m
Wed 10/215:25 pm -
1 stop19h 55m
Deal found 9/26![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:02 pm -
1 stop13h 29m
Wed 10/285:07 pm -
1 stop20h 39m
Deal found 9/28![Frontier logo]()
$143
This Southwest deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:35 pm -
1 stop6h 15m
Sat 10/2411:30 am -
Nonstop1h 10m
Deal found 9/27![Southwest logo]()
$127
This Southwest deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:05 pm -
2 stops6h 35m
Mon 10/266:55 pm -
1 stop5h 00m
Deal found 9/28![Southwest logo]()
$142
This Flightnetwork deal was found by Cheapflights users on 9/23. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:02 pm -
1 stop10h 02m
Thu 10/298:35 pm -
1 stop17h 11m
Deal found 9/23![Frontier logo]()
$129
This Southwest deal was found by Cheapflights users on 9/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:20 am -
1 stop5h 05m
Mon 10/266:55 pm -
1 stop5h 00m
Deal found 9/24![Southwest logo]()
$137
This Frontier deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:02 pm -
1 stop10h 02m
Mon 10/268:00 am -
1 stop5h 20m
Deal found 9/28![Frontier logo]()
$153
This Southwest deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:45 am -
Nonstop1h 20m
Mon 10/267:05 pm -
Nonstop1h 10m
Deal found 9/28![Southwest logo]()
$144
This FlightHub deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/269:02 pm -
1 stop12h 38m
Thu 10/298:35 pm -
1 stop17h 11m
Deal found 9/27![Frontier logo]()
$133
This Southwest deal was found by Cheapflights users on 9/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:00 am -
2 stops6h 55m
Tue 10/274:15 pm -
2 stops6h 35m
Deal found 9/24![Southwest logo]()
$147
One-way flights from San Jose to OntarioSearch for one-way flight options from San Jose to Ontario. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.
Search for one-way flight options from San Jose to Ontario. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.
This Super.com deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/264:15 pm -
1 stop3h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Frontier logo]()
$58
This Southwest deal was found by Cheapflights users on 9/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:30 pm -
Nonstop1h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Southwest logo]()
$59
This Super.com deal was found by Cheapflights users on 9/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/199:02 pm -
1 stop13h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Frontier logo]()
$63
This Super.com deal was found by Cheapflights users on 9/23. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/22:41 pm -
1 stop18h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Frontier logo]()
$64
This Frontier deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/159:02 pm -
1 stop10h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Frontier logo]()
$65
This Southwest deal was found by Cheapflights users on 9/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:15 am -
1 stop4h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![Southwest logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/269:02 pm -
1 stop12h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Frontier logo]()
$75
This Kiwi.com deal was found by Cheapflights users on 9/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/292:41 pm -
1 stop20h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![Frontier logo]()
$76
Find flight deals from San Jose to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from San Jose (SJC) 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 September 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $127 (Southwest) |
One-way from | $58 (Super.com) |
Popular in | January |
Cheapest in | September |
Average price | $216 |
Good round-trip deal | $134 or less |
Good one-way deal | $58 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from San Jose to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 28, 2026.
Use the filters below to find and compare flights from San Jose to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San JoseOntario
SJC San Jose - ONT Ontario
SJCONT
San Jose
Mon 11/2
4:00 pm-10:55 pm
2 stops6h 55m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$74
San JoseOntario
SJC San Jose - ONT Ontario
SJCONT
San Jose
Sat 10/31
1:00 pm-8:51 pm
1 stop7h 51m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$141
San JoseOntario
SJC San Jose - ONT Ontario
SJCONT
San Jose
Wed 12/23
6:15 pm-11:55 pm
1 stop5h 40m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$143
San JoseOntario
SJC San Jose - ONT Ontario
SJCONT
San Jose
Thu 11/19
8:30 am-9:45 am
Nonstop1h 15m
Ontario
Mon 11/23
3:55 pm-5:15 pm
Nonstop1h 20m
$144
San JoseOntario
SJC San Jose - ONT Ontario
SJCONT
San Jose
Tue 10/27
1:00 pm-8:51 pm
1 stop7h 51m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$176
San JoseOntario
SJC San Jose - ONT Ontario
SJCONT
San Jose
Wed 10/21
9:15 am-5:05 pm
2 stops7h 50m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$210
San JoseOntario
SJC San Jose - ONT Ontario
SJCONT
San Jose
Sat 10/24
6:33 am-5:05 pm
2 stops10h 32m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$216
San JoseOntario
SJC San Jose - ONT Ontario
SJCONT
San Jose
Fri 12/25
2:26 pm-9:00 pm
1 stop6h 34m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$223
San JoseOntario
SJC San Jose - ONT Ontario
SJCONT
San Jose
Sat 12/26
5:05 pm-11:10 pm
2 stops6h 05m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$225
San JoseOntario
SJC San Jose - ONT Ontario
SJCONT
San Jose
Wed 12/9
8:00 am-4:05 pm
1 stop8h 05m
Ontario
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$227
Showing 1-10 of 20 resultsSorted by cheapest first
Compare providers for flights from San Jose 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 San Jose to Ontario in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Jose, California-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Jose, California-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Jose, California-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Jose, California-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 San Jose, California-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 San Jose to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from San Jose with our price prediction graph.
SJC-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 San Jose to Ontario
How far ahead should I book a flight from San Jose, California to Ontario?
The price you pay for your flight from San Jose, California to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 67 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from San Jose, California to Ontario?
Currently, September is the cheapest month in which you can book a flight from San Jose, California to Ontario (average of $216). Flying from San Jose, California to Ontario in January is currently the most expensive (average of $379). 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.
What is the cheapest time of day to fly from SJC to ONT?
Find hourly flight availability from San Jose to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 28, 2026.
It’s optimal to fly from San Jose, California to Ontario in the afternoon. By choosing this option you can save up to 45% on the cost of your flight, compared to a flight at noon.
The best insider tips for San Jose to Ontario flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your San Jose to Ontario trip
Our travel experts
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 September 28, 2026.
Get a feel of what it's like to fly with Southwest and Frontier from San Jose 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
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Related info for your journey
Find useful and relevant information for your journey from San Jose 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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San Jose and Ontario flights
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Top 2 airlines flying from San Jose to Ontario
Discover the top 2 airlines that operate flights from San Jose to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$40 | Average$207 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$120 | Average$306 | FlexibilityNo cancel fee | On-time63% |