$85+ Cheap flights from San Antonio to Ontario (SAT - 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ONT
Apr 15 — Apr 221
Round-trip
1 adult, Economy
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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
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Cheapest flights from San Antonio to OntarioExplore the most affordable flight options available from San Antonio to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 16, 2026.
Explore the most affordable flight options available from San Antonio to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 16, 2026.
This Trip.com deal was found by Cheapflights users on 3/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/184:04 pm
SAT
- ONT
1 stop9h 51m
Frontier
Fri 4/2412:59 am
ONT
- SAT
1 stop12h 10m
Frontier
Deal found 3/11![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/224:49 pm
SAT
- ONT
1 stop9h 06m
Frontier
Sun 4/2612:59 am
ONT
- SAT
1 stop11h 16m
Frontier
Deal found 3/12![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
Wed 4/224:49 pm
SAT
- ONT
1 stop9h 06m
Frontier
Tue 4/2812:59 am
ONT
- SAT
1 stop12h 54m
Frontier
Deal found 3/13![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
Thu 5/77:54 pm
SAT
- ONT
1 stop16h 11m
Frontier
Tue 5/1210:50 am
ONT
- SAT
1 stop6h 09m
Frontier
Deal found 3/13![Frontier logo]()
$196
This Frontier deal was found by Cheapflights users on 3/11. 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 4/294:49 pm
SAT
- ONT
1 stop9h 06m
Frontier
Thu 4/3012:59 am
ONT
- SAT
1 stop11h 16m
Frontier
Deal found 3/11![Frontier logo]()
$200
This Booking.com deal was found by Cheapflights users on 3/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/154:49 pm
SAT
- ONT
1 stop16h 42m
Frontier
Fri 4/245:33 pm
ONT
- SAT
1 stop19h 36m
Frontier
Deal found 3/12![Frontier logo]()
$202
This Mytrip deal was found by Cheapflights users on 3/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/17:45 am
SAT
- ONT
1 stop18h 11m
Frontier
Fri 4/175:33 pm
ONT
- SAT
1 stop19h 36m
Frontier
Deal found 3/11![Frontier logo]()
$203
This Cheapflightsfares deal was found by Cheapflights users on 3/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/211:38 am
SAT
- ONT
1 stop7h 37m
Frontier
Tue 4/76:20 am
ONT
- SAT
1 stop15h 59m
Frontier
Deal found 3/11![Frontier logo]()
$208
This Gotogate deal was found by Cheapflights users on 3/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/214:04 pm
SAT
- ONT
1 stop9h 51m
Frontier
Thu 4/2311:47 am
ONT
- SAT
1 stop21h 53m
Frontier
Deal found 3/15![Frontier logo]()
$209
This CheapOair deal was found by Cheapflights users on 3/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/278:39 pm
SAT
- ONT
1 stop24h 10m
Frontier
Thu 4/305:43 pm
ONT
- SAT
1 stop18h 32m
Frontier
Deal found 3/13![Frontier logo]()
$211
Best flights from San Antonio to OntarioDiscover carefully curated flight deals from San Antonio to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 16, 2026.
Discover carefully curated flight deals from San Antonio to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 16, 2026.
This Southwest deal was found by Cheapflights users on 3/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/75:55 am
SAT
- ONT
2 stops7h 00m
Southwest
Tue 5/1212:40 pm
ONT
- SAT
2 stops7h 05m
Southwest
Deal found 3/13![Southwest logo]()
$401
This Delta deal was found by Cheapflights users on 3/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/207:00 am
SAT
- ONT
1 stop7h 14m
Delta
Tue 4/286:00 am
ONT
- SAT
1 stop5h 38m
Delta
Deal found 3/16![Delta logo]()
$411
This United Airlines deal was found by Cheapflights users on 3/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/225:30 am
SAT
- ONT
2 stops9h 08m
United Airlines
Wed 4/296:05 am
ONT
- SAT
1 stop7h 41m
United Airlines
Deal found 3/11![United Airlines logo]()
$420
This United Airlines deal was found by Cheapflights users on 3/12. 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.
Wed 5/271:39 pm
SAT
- ONT
1 stop5h 49m
United Airlines
Mon 6/11:18 pm
ONT
- SAT
1 stop5h 36m
United Airlines
Deal found 3/12![United Airlines logo]()
$440
This Delta deal was found by Cheapflights users on 3/11. 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.
Sun 7/58:00 am
SAT
- ONT
1 stop6h 29m
Delta
Fri 7/105:05 pm
ONT
- SAT
1 stop5h 39m
Delta
Deal found 3/11![Delta logo]()
$447
This Southwest deal was found by Cheapflights users on 3/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/106:45 pm
SAT
- ONT
2 stops6h 20m
Southwest
Sat 4/255:30 am
ONT
- SAT
2 stops7h 20m
Southwest
Deal found 3/11![Southwest logo]()
$451
This Delta deal was found by Cheapflights users on 3/12. 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 8/2112:15 pm
SAT
- ONT
1 stop7h 46m
Delta
Sun 8/236:00 am
ONT
- SAT
1 stop5h 31m
Delta
Deal found 3/12![Delta logo]()
$447
This United Airlines deal was found by Cheapflights users on 3/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/149:40 am
SAT
- ONT
2 stops12h 56m
United Airlines
Fri 4/176:05 am
ONT
- SAT
1 stop5h 03m
United Airlines
Deal found 3/11![United Airlines logo]()
$476
This Delta deal was found by Cheapflights users on 3/11. 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.
Sun 7/58:00 am
SAT
- ONT
1 stop6h 29m
Delta
Sun 7/55:05 pm
ONT
- SAT
1 stop5h 39m
Delta
Deal found 3/11![Delta logo]()
$447
This Delta deal was found by Cheapflights users on 3/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/15:55 pm
SAT
- ONT
1 stop7h 56m
Delta
Tue 4/75:09 pm
ONT
- SAT
1 stop5h 07m
Delta
Deal found 3/15![Delta logo]()
$486
Last-minute flights from San Antonio to OntarioDiscover last-minute flight deals from San Antonio to Ontario. Data last updated March 16, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Ontario. Data last updated March 16, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 3/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/17:45 am
SAT
- ONT
1 stop18h 11m
Frontier
Fri 4/175:33 pm
ONT
- SAT
1 stop19h 36m
Frontier
Deal found 3/11![Frontier logo]()
$203
This Cheapflightsfares deal was found by Cheapflights users on 3/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/211:38 am
SAT
- ONT
1 stop7h 37m
Frontier
Tue 4/76:20 am
ONT
- SAT
1 stop15h 59m
Frontier
Deal found 3/11![Frontier logo]()
$208
This Flightnetwork deal was found by Cheapflights users on 3/11. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/211:38 am
SAT
- ONT
1 stop7h 37m
Frontier
Thu 4/167:49 pm
ONT
- SAT
1 stop13h 19m
Frontier
Deal found 3/11![Frontier logo]()
$212
This Booking.com deal was found by Cheapflights users on 3/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/154:49 pm
SAT
- ONT
1 stop16h 42m
Frontier
Fri 4/245:33 pm
ONT
- SAT
1 stop19h 36m
Frontier
Deal found 3/12![Frontier logo]()
$202
This Trip.com deal was found by Cheapflights users on 3/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/184:04 pm
SAT
- ONT
1 stop9h 51m
Frontier
Fri 4/2412:59 am
ONT
- SAT
1 stop12h 10m
Frontier
Deal found 3/11![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/224:49 pm
SAT
- ONT
1 stop9h 06m
Frontier
Sun 4/2612:59 am
ONT
- SAT
1 stop11h 16m
Frontier
Deal found 3/12![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 3/13. 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.
Wed 4/224:49 pm
SAT
- ONT
1 stop9h 06m
Frontier
Tue 4/2812:59 am
ONT
- SAT
1 stop12h 54m
Frontier
Deal found 3/13![Frontier logo]()
$192
This CheapOair deal was found by Cheapflights users on 3/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/278:39 pm
SAT
- ONT
1 stop24h 10m
Frontier
Thu 4/305:43 pm
ONT
- SAT
1 stop18h 32m
Frontier
Deal found 3/13![Frontier logo]()
$211
This Frontier deal was found by Cheapflights users on 3/11. 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 4/294:49 pm
SAT
- ONT
1 stop9h 06m
Frontier
Thu 4/3012:59 am
ONT
- SAT
1 stop11h 16m
Frontier
Deal found 3/11![Frontier logo]()
$200
This Cheapflightsfares deal was found by Cheapflights users on 3/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/303:00 pm
SAT
- ONT
1 stop10h 55m
Frontier
Mon 5/412:59 am
ONT
- SAT
1 stop11h 20m
Frontier
Deal found 3/10![Frontier logo]()
$179
One-way flights from San Antonio to OntarioSearch for one-way flight options from San Antonio to Ontario. Find affordable one-way fares based on user searches. Data last updated March 16, 2026.
Search for one-way flight options from San Antonio to Ontario. Find affordable one-way fares based on user searches. Data last updated March 16, 2026.
This Trip.com deal was found by Cheapflights users on 3/12. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/224:49 pm
SAT
- ONT
1 stop9h 06m
Frontier
Deal found 3/12![Frontier logo]()
$85
This Cheapflightsfares deal was found by Cheapflights users on 3/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:26 pm
SAT
- ONT
1 stop6h 23m
Frontier
Deal found 3/10![Frontier logo]()
$90
This Super.com deal was found by Cheapflights users on 3/11. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1311:38 am
SAT
- ONT
1 stop10h 29m
Frontier
Deal found 3/11![Frontier logo]()
$95
This Cheapflightsfares deal was found by Cheapflights users on 3/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/254:04 pm
SAT
- ONT
1 stop9h 51m
Frontier
Deal found 3/10![Frontier logo]()
$96
This Booking.com deal was found by Cheapflights users on 3/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/77:54 pm
SAT
- ONT
1 stop6h 01m
Frontier
Deal found 3/10![Frontier logo]()
$100
This Kiwi.com deal was found by Cheapflights users on 3/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/303:00 pm
SAT
- ONT
1 stop10h 55m
Frontier
Deal found 3/11![Frontier logo]()
$103
This Cheapflightsfares deal was found by Cheapflights users on 3/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/77:45 am
SAT
- ONT
1 stop18h 11m
Frontier
Deal found 3/11![Frontier logo]()
$105
This Mytrip deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/17:45 am
SAT
- ONT
1 stop18h 11m
Frontier
Deal found 3/10![Frontier logo]()
$106
This Cheapflightsfares deal was found by Cheapflights users on 3/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/211:38 am
SAT
- ONT
1 stop7h 37m
Frontier
Deal found 3/12![Frontier logo]()
$108
This Cheapflightsfares deal was found by Cheapflights users on 3/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/37:26 pm
SAT
- ONT
1 stop6h 23m
Frontier
Deal found 3/10![Frontier logo]()
$110
Find flight deals from San Antonio to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) 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 March 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $175 (Trip.com) |
One-way from | $85 (Trip.com) |
Popular in | July |
Cheapest in | November |
Average price | $381 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Antonio 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 March 16, 2026.
Use the filters below to find and compare flights from San Antonio to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Thu 5/7
5:55 am-10:55 am
2 stops7h 00m
Ontario
Tue 5/12
12:40 pm-9:45 pm
2 stops7h 05m
$401
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Mon 4/20
7:00 am-12:14 pm
1 stop7h 14m
Ontario
Tue 4/28
6:00 am-1:38 pm
1 stop5h 38m
$411
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Wed 4/22
5:30 am-12:38 pm
2 stops9h 08m
Ontario
Wed 4/29
6:05 am-3:46 pm
1 stop7h 41m
$420
Quickest round-trip
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Wed 5/27
1:39 pm-5:28 pm
1 stop5h 49m
Ontario
Mon 6/1
1:18 pm-8:54 pm
1 stop5h 36m
$440
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Sun 7/5
8:00 am-12:29 pm
1 stop6h 29m
Ontario
Fri 7/10
5:05 pm-12:44 am
1 stop5h 39m
$447
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Fri 8/21
12:15 pm-6:01 pm
1 stop7h 46m
Ontario
Sun 8/23
6:00 am-1:31 pm
1 stop5h 31m
$447
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Sun 7/5
8:00 am-12:29 pm
1 stop6h 29m
Ontario
Sun 7/5
5:05 pm-12:44 am
1 stop5h 39m
$447
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Fri 4/10
6:45 pm-11:05 pm
2 stops6h 20m
Ontario
Sat 4/25
5:30 am-2:50 pm
2 stops7h 20m
$451
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Tue 4/14
9:40 am-8:36 pm
2 stops12h 56m
Ontario
Fri 4/17
6:05 am-1:08 pm
1 stop5h 03m
$476
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Wed 4/1
5:55 pm-11:51 pm
1 stop7h 56m
Ontario
Tue 4/7
5:09 pm-12:16 am
1 stop5h 07m
$486
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from San Antonio 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 Antonio to Ontario in March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on San Antonio-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Antonio-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Antonio-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Antonio-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 Antonio-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 Antonio to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from San Antonio with our price prediction graph.
SAT-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 Antonio to Ontario
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How far ahead should I book a flight from San Antonio to Ontario?
Use this chart to determine the optimal time to book a round-trip flight from San Antonio to Ontario. Price data was last updated on March 13, 2026.
Booking 47 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Antonio to Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from San Antonio to Ontario?
Currently, September is the cheapest month in which you can book a flight from San Antonio to Ontario (average of $60). Flying from San Antonio to Ontario in February is currently the most expensive (average of $137). 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’s the top layover airport for flights from San Antonio to Ontario?
Share of 1-stop round-trip flights from San Antonio to Ontario chosen by Cheapflights users in the past 12 months, using the same layover each way.
Phoenix (PHX) – chosen by Cheapflights users on 75% of 1-stop itineraries from San Antonio to Ontario on Cheapflights.
What’s the cheapest layover airport for flights from San Antonio to Ontario?
Average round-trip fare for 1-stop flights from San Antonio to Ontario, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $272.
What’s the fastest layover option from San Antonio to Ontario?
Shortest average travel time for 1-stop one-way flights from San Antonio 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: 4h 44m.
Which airport typically offers the quickest layover for flights from San Antonio to Ontario?
Average layover duration for 1-stop one-way flights from San Antonio to Ontario, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Phoenix (PHX) offer the fastest connection on this route, with an average layover time of 1h 02m.
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 March 16, 2026.
Read through reviews of airlines operating flights from San Antonio to Ontario, such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Related info for your journey
Find useful and relevant information for your journey from San Antonio to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 16, 2026.
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Top 4 airlines flying from San Antonio to Ontario
Discover the top 4 airlines that operate flights from San Antonio 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 March 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$150 | Average$229 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$273 | Average$381 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$296 | Average$396 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$307 | Average$466 | FlexibilityNo cancel fee | On-time69% |