$80+ Cheap flights from Ontario to San Antonio (ONT - SAT)
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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SAT
abr. 22 — abr. 291
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to San Antonio 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 Ontario to San Antonio
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Cheapest flights from Ontario to San AntonioExplore the most affordable flight options available from Ontario to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on marzo 23, 2026.
Explore the most affordable flight options available from Ontario to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on marzo 23, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 3/23. 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.
vie. 4/175:33 pm
ONT
- SAT
1 stop19h 36m
Frontier
mar. 4/214:04 pm
SAT
- ONT
1 stop9h 51m
Frontier
Deal found 3/23![Frontier logo]()
$159
This Frontier deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/2412:59 am
ONT
- SAT
1 stop12h 10m
Frontier
mar. 4/284:04 pm
SAT
- ONT
1 stop9h 51m
Frontier
Deal found 3/21![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/1712:59 am
ONT
- SAT
1 stop12h 10m
Frontier
lun. 4/206:31 pm
SAT
- ONT
1 stop18h 13m
Frontier
Deal found 3/21![Frontier logo]()
$162
This Booking.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/910:50 am
ONT
- SAT
1 stop6h 09m
Frontier
lun. 5/118:59 pm
SAT
- ONT
1 stop20h 45m
Frontier
Deal found 3/21![Frontier logo]()
$167
This Booking.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/2112:59 am
ONT
- SAT
1 stop12h 54m
Frontier
mar. 4/284:04 pm
SAT
- ONT
1 stop9h 51m
Frontier
Deal found 3/21![Frontier logo]()
$172
This Cheapflightsfares deal was found by Cheapflights users on 3/23. 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.
vie. 4/106:20 am
ONT
- SAT
1 stop15h 59m
Frontier
lun. 4/1311:38 am
SAT
- ONT
1 stop10h 29m
Frontier
Deal found 3/23![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/109:02 pm
ONT
- SAT
1 stop11h 41m
Frontier
vie. 4/173:00 pm
SAT
- ONT
1 stop10h 55m
Frontier
Deal found 3/20![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
mar. 4/1412:59 am
ONT
- SAT
1 stop12h 54m
Frontier
mié. 4/224:49 pm
SAT
- ONT
1 stop9h 06m
Frontier
Deal found 3/18![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/2812:59 am
ONT
- SAT
1 stop12h 54m
Frontier
sáb. 5/24:04 pm
SAT
- ONT
1 stop9h 51m
Frontier
Deal found 3/20![Frontier logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
vie. 4/175:33 pm
ONT
- SAT
1 stop19h 36m
Frontier
mié. 4/224:49 pm
SAT
- ONT
1 stop9h 06m
Frontier
Deal found 3/18![Frontier logo]()
$190
This CheapOair deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/76:20 am
ONT
- SAT
1 stop15h 59m
Frontier
lun. 4/1311:38 am
SAT
- ONT
1 stop10h 29m
Frontier
Deal found 3/20![Frontier logo]()
$191
Best flights from Ontario to San AntonioDiscover carefully curated flight deals from Ontario to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated marzo 23, 2026.
Discover carefully curated flight deals from Ontario to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated marzo 23, 2026.
This Southwest deal was found by Cheapflights users on 3/19. 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.
mié. 4/294:30 pm
ONT
- SAT
1 stop5h 00m
Southwest
vie. 5/16:15 am
SAT
- ONT
2 stops7h 55m
Southwest
Deal found 3/19![Southwest logo]()
$412
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 6/186:00 am
ONT
- SAT
1 stop5h 40m
Delta
dom. 6/216:31 am
SAT
- ONT
1 stop7h 39m
Delta
Deal found 3/22![Delta logo]()
$493
This United Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/246:45 pm
ONT
- SAT
2 stops14h 05m
United Airlines
mié. 4/2911:46 am
SAT
- ONT
2 stops12h 59m
United Airlines
Deal found 3/21![United Airlines logo]()
$513
This Southwest deal was found by Cheapflights users on 3/18. 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.
vie. 4/171:55 pm
ONT
- SAT
2 stops7h 00m
Southwest
mié. 4/225:55 pm
SAT
- ONT
2 stops5h 35m
Southwest
Deal found 3/18![Southwest logo]()
$417
This Southwest deal was found by Cheapflights users on 3/18. 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.
mar. 4/710:55 am
ONT
- SAT
2 stops7h 20m
Southwest
sáb. 4/182:45 pm
SAT
- ONT
2 stops8h 35m
Southwest
Deal found 3/18![Southwest logo]()
$463
This United Airlines deal was found by Cheapflights users on 3/18. 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.
dom. 4/196:49 pm
ONT
- SAT
2 stops11h 53m
United Airlines
sáb. 4/258:45 am
SAT
- ONT
2 stops11h 02m
United Airlines
Deal found 3/18![United Airlines logo]()
$513
This Southwest deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/2710:30 am
ONT
- SAT
2 stops5h 45m
Southwest
sáb. 5/302:45 pm
SAT
- ONT
2 stops8h 35m
Southwest
Deal found 3/22![Southwest logo]()
$477
This United Airlines deal was found by Cheapflights users on 3/18. 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.
jue. 5/211:18 pm
ONT
- SAT
2 stops7h 24m
United Airlines
dom. 5/244:18 pm
SAT
- ONT
1 stop7h 37m
United Airlines
Deal found 3/18![United Airlines logo]()
$532
This United Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/175:10 am
ONT
- SAT
2 stops10h 33m
United Airlines
mar. 4/2111:46 am
SAT
- ONT
2 stops10h 50m
United Airlines
Deal found 3/21![United Airlines logo]()
$588
This Southwest deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 4/63:05 pm
ONT
- SAT
2 stops7h 10m
Southwest
jue. 4/95:55 am
SAT
- ONT
2 stops7h 00m
Southwest
Deal found 3/22![Southwest logo]()
$538
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/105:10 am
ONT
- SAT
2 stops10h 33m
United Airlines
lun. 4/134:17 pm
SAT
- ONT
1 stop7h 33m
United Airlines
Deal found 3/22![United Airlines logo]()
$592
This United Airlines deal was found by Cheapflights users on 3/18. 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.
jue. 4/166:49 pm
ONT
- SAT
1 stop8h 11m
United Airlines
jue. 4/236:02 pm
SAT
- ONT
2 stops28h 34m
United Airlines
Deal found 3/18![United Airlines logo]()
$610
Last-minute flights from Ontario to San AntonioDiscover last-minute flight deals from Ontario to San Antonio. Data last updated marzo 23, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to San Antonio. Data last updated marzo 23, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/76:20 am
ONT
- SAT
1 stop15h 59m
Frontier
lun. 4/1311:38 am
SAT
- ONT
1 stop10h 29m
Frontier
Deal found 3/20![Frontier logo]()
$191
This Cheapflightsfares deal was found by Cheapflights users on 3/23. 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.
vie. 4/106:20 am
ONT
- SAT
1 stop15h 59m
Frontier
lun. 4/1311:38 am
SAT
- ONT
1 stop25h 06m
Frontier
Deal found 3/23![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/109:02 pm
ONT
- SAT
1 stop11h 41m
Frontier
vie. 4/173:00 pm
SAT
- ONT
1 stop10h 55m
Frontier
Deal found 3/20![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 3/19. 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.
mar. 4/1412:59 am
ONT
- SAT
1 stop12h 54m
Frontier
mié. 4/224:49 pm
SAT
- ONT
1 stop9h 06m
Frontier
Deal found 3/19![Frontier logo]()
$181
This Cheapflightsfares deal was found by Cheapflights users on 3/23. 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.
vie. 4/175:33 pm
ONT
- SAT
1 stop19h 36m
Frontier
mar. 4/214:04 pm
SAT
- ONT
1 stop9h 51m
Frontier
Deal found 3/23![Frontier logo]()
$159
This Frontier deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/1712:59 am
ONT
- SAT
1 stop12h 10m
Frontier
lun. 4/206:31 pm
SAT
- ONT
1 stop18h 13m
Frontier
Deal found 3/21![Frontier logo]()
$162
This CheapOair deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/175:33 pm
ONT
- SAT
1 stop19h 36m
Frontier
lun. 4/206:31 pm
SAT
- ONT
1 stop18h 13m
Frontier
Deal found 3/20![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
vie. 4/175:33 pm
ONT
- SAT
1 stop19h 36m
Frontier
mié. 4/224:49 pm
SAT
- ONT
1 stop9h 06m
Frontier
Deal found 3/18![Frontier logo]()
$190
This Booking.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/2112:59 am
ONT
- SAT
1 stop12h 54m
Frontier
mar. 4/284:04 pm
SAT
- ONT
1 stop9h 51m
Frontier
Deal found 3/21![Frontier logo]()
$172
This Frontier deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/2412:59 am
ONT
- SAT
1 stop12h 10m
Frontier
mar. 4/284:04 pm
SAT
- ONT
1 stop9h 51m
Frontier
Deal found 3/21![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/2812:59 am
ONT
- SAT
1 stop12h 54m
Frontier
sáb. 5/24:04 pm
SAT
- ONT
1 stop9h 51m
Frontier
Deal found 3/20![Frontier logo]()
$187
This Frontier deal was found by Cheapflights users on 3/23. 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.
jue. 4/305:43 pm
ONT
- SAT
1 stop18h 32m
Frontier
lun. 5/46:31 pm
SAT
- ONT
1 stop23h 13m
Frontier
Deal found 3/23![Frontier logo]()
$182
One-way flights from Ontario to San AntonioSearch for one-way flight options from Ontario to San Antonio. Find affordable one-way fares based on user searches. Data last updated marzo 23, 2026.
Search for one-way flight options from Ontario to San Antonio. Find affordable one-way fares based on user searches. Data last updated marzo 23, 2026.
This Frontier deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/510:50 am
ONT
- SAT
1 stop6h 09m
Frontier
Deal found 3/20![Frontier logo]()
$80
This Frontier deal was found by Cheapflights users on 3/23. 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.
mar. 5/1210:50 am
ONT
- SAT
1 stop6h 09m
Frontier
Deal found 3/23![Frontier logo]()
$81
This Frontier deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 4/109:02 pm
ONT
- SAT
1 stop11h 41m
Frontier
Deal found 3/20![Frontier logo]()
$86
This CheapOair deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 4/1412:59 am
ONT
- SAT
1 stop12h 54m
Frontier
Deal found 3/20![Frontier logo]()
$92
This Trip.com deal was found by Cheapflights users on 3/18. 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.
mar. 4/76:20 am
ONT
- SAT
1 stop15h 59m
Frontier
Deal found 3/18![Frontier logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/16:20 am
ONT
- SAT
1 stop15h 59m
Frontier
Deal found 3/20![Frontier logo]()
$94
This Cheapflightsfares deal was found by Cheapflights users on 3/18. 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.
mié. 5/1310:50 am
ONT
- SAT
1 stop6h 09m
Frontier
Deal found 3/18![Frontier logo]()
$100
This Frontier deal was found by Cheapflights users on 3/23. 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.
sáb. 5/1610:50 am
ONT
- SAT
1 stop6h 09m
Frontier
Deal found 3/23![Frontier logo]()
$101
This Cheapflightsfares deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/276:00 am
ONT
- SAT
1 stop10h 59m
Frontier
Deal found 3/20![Frontier logo]()
$105
Find flight deals from Ontario to San Antonio
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to San Antonio (SAT). 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 marzo 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $159 (Cheapflightsfares) |
One-way from | $80 (Frontier) |
Popular in | March |
Cheapest in | October |
Average price | $406 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to San Antonio 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 marzo 23, 2026.
Use the filters below to find and compare flights from Ontario to San Antonio that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
mié. 4/29
4:30 pm-11:30 pm
1 stop5h 00m
San Antonio
vie. 5/1
6:15 am-12:10 pm
2 stops7h 55m
$412
Quickest round-trip
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
vie. 4/17
1:55 pm-10:55 pm
2 stops7h 00m
San Antonio
mié. 4/22
5:55 pm-9:30 pm
2 stops5h 35m
$417
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
mar. 4/7
10:55 am-8:15 pm
2 stops7h 20m
San Antonio
sáb. 4/18
2:45 pm-9:20 pm
2 stops8h 35m
$463
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
mié. 5/27
10:30 am-6:15 pm
2 stops5h 45m
San Antonio
sáb. 5/30
2:45 pm-9:20 pm
2 stops8h 35m
$477
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
jue. 6/18
6:00 am-1:40 pm
1 stop5h 40m
San Antonio
dom. 6/21
6:31 am-12:10 pm
1 stop7h 39m
$493
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
vie. 4/24
6:45 pm-10:50 am
2 stops14h 05m
San Antonio
mié. 4/29
11:46 am-10:45 pm
2 stops12h 59m
$513
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
dom. 4/19
6:49 pm-8:42 am
2 stops11h 53m
San Antonio
sáb. 4/25
8:45 am-5:47 pm
2 stops11h 02m
$513
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
jue. 5/21
1:18 pm-10:42 pm
2 stops7h 24m
San Antonio
dom. 5/24
4:18 pm-9:55 pm
1 stop7h 37m
$532
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
lun. 4/6
3:05 pm-12:15 am
2 stops7h 10m
San Antonio
jue. 4/9
5:55 am-10:55 am
2 stops7h 00m
$538
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
vie. 4/17
5:10 am-5:43 pm
2 stops10h 33m
San Antonio
mar. 4/21
11:46 am-8:36 pm
2 stops10h 50m
$588
Showing 1-10 of 24 resultsSorted by cheapest first
Compare providers for flights from Ontario to San Antonio
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 Ontario to San Antonio 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 Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars |
- Most accurate provider: When it comes to deals on Ontario-San Antonio flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-San Antonio flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-San Antonio flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-San Antonio 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 Ontario-San Antonio 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 Ontario to San Antonio
Have a flexible travel schedule? Discover the best time to fly to San Antonio from Ontario with our price prediction graph.
ONT-SAT
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 Ontario to San Antonio
Prices
More
How far ahead should I book a flight from Ontario to San Antonio?
Use this chart to determine the optimal time to book a round-trip flight from Ontario to San Antonio. Price data was last updated on March 13, 2026.
The best time to book flights from Ontario to San Antonio is 64 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Ontario to San Antonio?
Currently, September is the cheapest month in which you can book a flight from Ontario to San Antonio (average of $58). Flying from Ontario to San Antonio in March is currently the most expensive (average of $135). 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 Ontario to San Antonio?
Share of 1-stop round-trip flights from Ontario to San Antonio chosen by Cheapflights users in the past 12 months, using the same layover each way.
Phoenix (PHX) – chosen by Cheapflights users on 67% of 1-stop itineraries from Ontario to San Antonio on Cheapflights.
What’s the cheapest layover airport for flights from Ontario to San Antonio?
Average round-trip fare for 1-stop flights from Ontario to San Antonio, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Phoenix (PHX) is the most affordable 1-stop option, with an average round-trip price of $225.
What’s the fastest layover option from Ontario to San Antonio?
Shortest average travel time for 1-stop one-way flights from Ontario to San Antonio, 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 34m.
Which airport typically offers the quickest layover for flights from Ontario to San Antonio?
Average layover duration for 1-stop one-way flights from Ontario to San Antonio, 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 0h 52m.
Reviews of airlines servicing San Antonio
Get insights into the airlines that provide service to San Antonio. 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 San Antonio. Reviews last updated marzo 23, 2026.
See what other customers who have flown with Southwest,United Airlines, andAmerican Airlines from Ontario to San Antonio have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Crew
8.6
Entertainment
7.5
Overall
8.0
Comfort
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 Ontario to San Antonio. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Antonio?
Book flights to San Antonio if you plan to visit one of these locationsNew Braunfels
Kerrville
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Ontario and San Antonio flights
Browse other Ontario and San Antonio flight options. Last updated on marzo 23, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on marzo 23, 2026.
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Other flights to San Antonio
Explore flights to San Antonio departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on marzo 23, 2026.
Top 6 airlines flying from Ontario to San Antonio
Discover the top 6 airlines that operate flights from Ontario to San Antonio. 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 marzo 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$104 | Average$170 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$110 | Average$237 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$200 | Average$321 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$226 | Average$388 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$256 | Average$381 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$270 | Average$336 | FlexibilityNo cancel fee | On-time69% |