$121+ 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 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ONT
Aug 27 — Sep 31
Round-trip
1 adult, Economy
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Find cheap flights from San Antonio 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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from San Antonio to Ontario
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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 July 28, 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 July 28, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:24 pm
SAT
- ONT
1 stop11h 39m
Frontier
Mon 8/2410:49 am
ONT
- SAT
1 stop6h 42m
Frontier
Deal found 7/26![Frontier logo]()
$244
This Frontier deal was found by Cheapflights users on 7/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:49 pm
SAT
- ONT
1 stop6h 01m
Frontier
Wed 8/196:00 am
ONT
- SAT
1 stop11h 31m
Frontier
Deal found 7/25![Frontier logo]()
$246
This Gotogate deal was found by Cheapflights users on 7/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:49 pm
SAT
- ONT
1 stop6h 01m
Frontier
Mon 8/2410:49 am
ONT
- SAT
1 stop6h 42m
Frontier
Deal found 7/26![Frontier logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/88:26 pm
SAT
- ONT
1 stop16h 04m
Frontier
Thu 9/106:15 am
ONT
- SAT
1 stop11h 10m
Frontier
Deal found 7/26![Frontier logo]()
$251
This Cheapflightsfares deal was found by Cheapflights users on 7/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/810:41 pm
SAT
- ONT
1 stop23h 18m
Frontier
Tue 10/1311:38 am
ONT
- SAT
1 stop21h 43m
Frontier
Deal found 7/23![Frontier logo]()
$252
This Booking.com deal was found by Cheapflights users on 7/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:26 pm
SAT
- ONT
1 stop15h 38m
Frontier
Mon 8/3110:49 am
ONT
- SAT
1 stop6h 42m
Frontier
Deal found 7/26![Frontier logo]()
$254
This Frontier deal was found by Cheapflights users on 7/23. 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 8/137:49 pm
SAT
- ONT
1 stop6h 01m
Frontier
Sat 8/156:00 am
ONT
- SAT
1 stop10h 54m
Frontier
Deal found 7/23![Frontier logo]()
$256
This CheapOair deal was found by Cheapflights users on 7/26. 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.
Tue 9/18:26 pm
SAT
- ONT
1 stop15h 38m
Frontier
Sat 9/57:56 pm
ONT
- SAT
1 stop21h 35m
Frontier
Deal found 7/26![Frontier logo]()
$257
This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/910:41 pm
SAT
- ONT
1 stop19h 29m
Frontier
Mon 10/126:00 am
ONT
- SAT
1 stop27h 21m
Frontier
Deal found 7/26![Frontier logo]()
$260
This Flightnetwork deal was found by Cheapflights users on 7/23. 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 8/137:49 pm
SAT
- ONT
1 stop6h 01m
Frontier
Wed 8/196:00 am
ONT
- SAT
1 stop11h 31m
Frontier
Deal found 7/23![Frontier logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 7/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2412:16 pm
SAT
- ONT
1 stop13h 39m
Frontier
Thu 10/2911:19 am
ONT
- SAT
1 stop7h 37m
Frontier
Deal found 7/25![Frontier logo]()
$263
This Frontier deal was found by Cheapflights users on 7/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2612:43 pm
SAT
- ONT
1 stop9h 16m
Frontier
Fri 11/1311:19 am
ONT
- SAT
1 stop7h 37m
Frontier
Deal found 7/26![Frontier logo]()
$264
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 July 28, 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 July 28, 2026.
This Delta deal was found by Cheapflights users on 7/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:50 am
SAT
- ONT
1 stop7h 26m
Delta
Sat 8/226:00 am
ONT
- SAT
1 stop5h 31m
Delta
Deal found 7/25![Delta logo]()
$365
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Tue 9/85:30 am
SAT
- ONT
2 stops8h 42m
United Airlines
Tue 9/151:18 pm
ONT
- SAT
2 stops7h 26m
United Airlines
Deal found 7/27![United Airlines logo]()
$378
This Southwest deal was found by Cheapflights users on 7/23. 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.
Thu 10/223:55 pm
SAT
- ONT
2 stops7h 45m
Southwest
Sat 10/245:30 am
ONT
- SAT
2 stops6h 10m
Southwest
Deal found 7/23![Southwest logo]()
$383
This Delta deal was found by Cheapflights users on 7/24. 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.
Wed 9/1612:29 pm
SAT
- ONT
1 stop6h 06m
Delta
Mon 9/215:15 pm
ONT
- SAT
1 stop5h 16m
Delta
Deal found 7/24![Delta logo]()
$392
This Southwest deal was found by Cheapflights users on 7/27. 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.
Thu 9/1012:20 pm
SAT
- ONT
2 stops9h 05m
Southwest
Mon 9/145:15 am
ONT
- SAT
2 stops8h 05m
Southwest
Deal found 7/27![Southwest logo]()
$398
This United Airlines deal was found by Cheapflights users on 7/23. 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.
Thu 8/134:39 pm
SAT
- ONT
1 stop6h 14m
United Airlines
Sat 8/155:00 am
ONT
- SAT
2 stops12h 58m
United Airlines
Deal found 7/23![United Airlines logo]()
$442
This Southwest deal was found by Cheapflights users on 7/24. 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.
Fri 1/812:00 pm
SAT
- ONT
2 stops8h 30m
Southwest
Mon 1/1112:45 pm
ONT
- SAT
1 stop6h 55m
Southwest
Deal found 7/24![Southwest logo]()
$411
This United Airlines deal was found by Cheapflights users on 7/23. 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.
Mon 9/145:59 pm
SAT
- ONT
1 stop6h 00m
United Airlines
Sat 9/195:00 am
ONT
- SAT
2 stops12h 53m
United Airlines
Deal found 7/23![United Airlines logo]()
$442
This Southwest deal was found by Cheapflights users on 7/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:55 pm
SAT
- ONT
2 stops9h 15m
Southwest
Sun 11/112:40 pm
ONT
- SAT
2 stops7h 30m
Southwest
Deal found 7/26![Southwest logo]()
$427
This United Airlines deal was found by Cheapflights users on 7/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:12 pm
SAT
- ONT
1 stop7h 47m
United Airlines
Mon 8/246:00 am
ONT
- SAT
1 stop7h 43m
United Airlines
Deal found 7/26![United Airlines logo]()
$444
This Southwest deal was found by Cheapflights users on 7/25. 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.
Sun 9/206:20 am
SAT
- ONT
2 stops7h 15m
Southwest
Thu 9/245:40 am
ONT
- SAT
2 stops6h 30m
Southwest
Deal found 7/25![Southwest logo]()
$448
Last-minute flights from San Antonio to OntarioDiscover last-minute flight deals from San Antonio to Ontario. Data last updated July 28, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Ontario. Data last updated July 28, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 7/23. 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 8/137:49 pm
SAT
- ONT
1 stop6h 01m
Frontier
Sat 8/156:00 am
ONT
- SAT
1 stop10h 54m
Frontier
Deal found 7/23![Frontier logo]()
$256
This Flightnetwork deal was found by Cheapflights users on 7/23. 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 8/137:49 pm
SAT
- ONT
1 stop6h 01m
Frontier
Wed 8/196:00 am
ONT
- SAT
1 stop11h 31m
Frontier
Deal found 7/23![Frontier logo]()
$262
This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/149:32 pm
SAT
- ONT
1 stop19h 42m
Frontier
Mon 8/1711:47 am
ONT
- SAT
1 stop6h 50m
Frontier
Deal found 7/26![Frontier logo]()
$269
This Frontier deal was found by Cheapflights users on 7/25. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:49 pm
SAT
- ONT
1 stop6h 01m
Frontier
Wed 8/196:00 am
ONT
- SAT
1 stop11h 31m
Frontier
Deal found 7/25![Frontier logo]()
$246
This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:49 pm
SAT
- ONT
1 stop6h 01m
Frontier
Tue 8/187:56 pm
ONT
- SAT
1 stop21h 35m
Frontier
Deal found 7/26![Frontier logo]()
$268
This Gotogate deal was found by Cheapflights users on 7/26. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:49 pm
SAT
- ONT
1 stop6h 01m
Frontier
Mon 8/2410:49 am
ONT
- SAT
1 stop6h 42m
Frontier
Deal found 7/26![Frontier logo]()
$247
This Cheapflightsfares deal was found by Cheapflights users on 7/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:26 pm
SAT
- ONT
1 stop15h 38m
Frontier
Mon 8/243:40 pm
ONT
- SAT
1 stop27h 49m
Frontier
Deal found 7/23![Frontier logo]()
$252
This CheapOair deal was found by Cheapflights users on 7/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1810:24 pm
SAT
- ONT
1 stop19h 30m
Frontier
Tue 9/13:40 pm
ONT
- SAT
1 stop27h 49m
Frontier
Deal found 7/23![Frontier logo]()
$267
This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:24 pm
SAT
- ONT
1 stop11h 39m
Frontier
Mon 8/2410:49 am
ONT
- SAT
1 stop6h 42m
Frontier
Deal found 7/26![Frontier logo]()
$244
This Frontier deal was found by Cheapflights users on 7/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2010:24 pm
SAT
- ONT
1 stop11h 39m
Frontier
Fri 8/2111:50 am
ONT
- SAT
1 stop7h 39m
Frontier
Deal found 7/27![Frontier logo]()
$264
This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/218:26 pm
SAT
- ONT
1 stop15h 38m
Frontier
Mon 8/2410:17 pm
ONT
- SAT
1 stop21h 12m
Frontier
Deal found 7/26![Frontier logo]()
$260
This Booking.com deal was found by Cheapflights users on 7/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:26 pm
SAT
- ONT
1 stop15h 38m
Frontier
Mon 8/3110:49 am
ONT
- SAT
1 stop6h 42m
Frontier
Deal found 7/26![Frontier logo]()
$254
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 July 28, 2026.
Search for one-way flight options from San Antonio to Ontario. Find affordable one-way fares based on user searches. Data last updated July 28, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 7/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:20 pm
SAT
- ONT
1 stop5h 27m
Frontier
Deal found 7/25![Frontier logo]()
$121
This Super.com deal was found by Cheapflights users on 7/24. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/228:20 pm
SAT
- ONT
1 stop5h 27m
Frontier
Deal found 7/24![Frontier logo]()
$122
This Super.com deal was found by Cheapflights users on 7/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/268:20 pm
SAT
- ONT
1 stop5h 27m
Frontier
Deal found 7/26![Frontier logo]()
$123
This Cheapflightsfares deal was found by Cheapflights users on 7/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:49 pm
SAT
- ONT
1 stop6h 06m
Frontier
Deal found 7/23![Frontier logo]()
$126
This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/318:26 pm
SAT
- ONT
1 stop15h 38m
Frontier
Deal found 7/26![Frontier logo]()
$127
This Super.com deal was found by Cheapflights users on 7/27. 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.
Sat 11/147:48 pm
SAT
- ONT
1 stop16h 36m
Frontier
Deal found 7/27![Frontier logo]()
$128
This Frontier deal was found by Cheapflights users on 7/28. 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.
Wed 8/1910:24 pm
SAT
- ONT
1 stop11h 39m
Frontier
Deal found 7/28![Frontier logo]()
$129
This Cheapflightsfares deal was found by Cheapflights users on 7/23. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:24 pm
SAT
- ONT
1 stop11h 39m
Frontier
Deal found 7/23![Frontier logo]()
$132
This CheapOair deal was found by Cheapflights users on 7/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1312:16 pm
SAT
- ONT
1 stop13h 39m
Frontier
Deal found 7/25![Frontier logo]()
$135
This Cheapflightsfares deal was found by Cheapflights users on 7/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:20 pm
SAT
- ONT
1 stop5h 27m
Frontier
Deal found 7/25![Frontier logo]()
$139
This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2810:24 pm
SAT
- ONT
1 stop19h 30m
Frontier
Deal found 7/26![Frontier logo]()
$145
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 July 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $244 (Cheapflightsfares) |
One-way from | $121 (Cheapflightsfares) |
Popular in | June |
Cheapest in | November |
Average price | $403 |
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 July 28, 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
Sat 8/15
6:50 am-12:16 pm
1 stop7h 26m
Ontario
Sat 8/22
6:00 am-1:31 pm
1 stop5h 31m
$365
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Tue 9/8
5:30 am-12:12 pm
2 stops8h 42m
Ontario
Tue 9/15
1:18 pm-10:44 pm
2 stops7h 26m
$378
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Thu 10/22
3:55 pm-9:40 pm
2 stops7h 45m
Ontario
Sat 10/24
5:30 am-1:40 pm
2 stops6h 10m
$383
Quickest round-trip
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Wed 9/16
12:29 pm-4:35 pm
1 stop6h 06m
Ontario
Mon 9/21
5:15 pm-12:31 am
1 stop5h 16m
$392
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Thu 9/10
12:20 pm-7:25 pm
2 stops9h 05m
Ontario
Mon 9/14
5:15 am-3:20 pm
2 stops8h 05m
$398
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Fri 1/8
12:00 pm-6:30 pm
2 stops8h 30m
Ontario
Mon 1/11
12:45 pm-9:40 pm
1 stop6h 55m
$411
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Fri 10/30
1:55 pm-9:10 pm
2 stops9h 15m
Ontario
Sun 11/1
12:40 pm-10:10 pm
2 stops7h 30m
$427
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Thu 8/13
4:39 pm-8:53 pm
1 stop6h 14m
Ontario
Sat 8/15
5:00 am-7:58 pm
2 stops12h 58m
$442
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Mon 9/14
5:59 pm-9:59 pm
1 stop6h 00m
Ontario
Sat 9/19
5:00 am-7:53 pm
2 stops12h 53m
$442
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Mon 8/17
4:12 pm-9:59 pm
1 stop7h 47m
Ontario
Mon 8/24
6:00 am-3:43 pm
1 stop7h 43m
$444
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 July.
| 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 Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| 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
Prices
More
How far ahead should I book a flight from San Antonio to Ontario?
Booking 46 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, November is the cheapest month in which you can book a flight from San Antonio to Ontario (average of $273). Flying from San Antonio to Ontario in June is currently the most expensive (average of $416). 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 San Antonio to Ontario?
Airfare is typical for this route at the moment.
San Antonio to Ontario flights typically cost between $238 and $396 in August.The cheapest round-trip price found within the last 5 days was $244 on Frontier (Aug 20-Aug 24).
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 50% 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 $248.
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 52m.
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 10m.
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 July 28, 2026.
Read through reviews of airlines operating flights from San Antonio to Ontario, such as Southwest,American Airlines, andFrontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
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 July 28, 2026.
San Antonio and Ontario flights
Browse other San Antonio and Ontario flight options. Last updated on July 28, 2026.
Other flights from San Antonio
Browse through other flights departing from San Antonio. Flights are based on user searches made on Cheapflights and were last updated on July 28, 2026.
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Top 3 airlines flying from San Antonio to Ontario
Discover the top 3 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 July 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$140 | Average$272 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$273 | Average$403 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$297 | Average$436 | FlexibilityNo cancel fee | On-time63% |