$121+ 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SAT
Sep 6 — Sep 131
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 August 7, 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 August 7, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 8/3. 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 9/13:40 pm -
1 stop27h 49m
Tue 9/810:24 pm -
1 stop20h 35m
Deal found 8/3![Frontier logo]()
$244
This Frontier deal was found by Cheapflights users on 8/4. 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 11/126:15 am -
1 stop10h 46m
Mon 11/1612:43 pm -
1 stop10h 05m
Deal found 8/4![Frontier logo]()
$246
This Frontier deal was found by Cheapflights users on 8/3. 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 8/2911:50 am -
1 stop7h 39m
Mon 8/3110:24 pm -
1 stop19h 25m
Deal found 8/3![Frontier logo]()
$247
This Booking.com deal was found by Cheapflights users on 8/5. 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.
Sat 8/2911:50 am -
1 stop7h 39m
Tue 9/110:24 pm -
1 stop19h 25m
Deal found 8/5![Frontier logo]()
$252
This Booking.com deal was found by Cheapflights users on 8/4. 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 8/256:00 am -
1 stop11h 31m
Tue 9/110:24 pm -
1 stop19h 25m
Deal found 8/4![Frontier logo]()
$258
This Cheapflightsfares deal was found by Cheapflights users on 8/4. 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 8/2810:49 am -
1 stop6h 42m
Sat 8/298:26 pm -
1 stop15h 38m
Deal found 8/4![Frontier logo]()
$260
This Frontier deal was found by Cheapflights users on 8/2. 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 9/216:15 am -
1 stop11h 10m
Fri 9/258:20 pm -
1 stop5h 27m
Deal found 8/2![Frontier logo]()
$264
This Trip.com deal was found by Cheapflights users on 8/6. 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 11/112:35 pm -
1 stop17h 37m
Sat 11/147:48 pm -
1 stop16h 36m
Deal found 8/6![Frontier logo]()
$266
This Cheapflightsfares deal was found by Cheapflights users on 8/3. 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 10/18:24 pm -
1 stop13h 20m
Sun 10/412:39 pm -
1 stop24h 43m
Deal found 8/3![Frontier logo]()
$268
This Cheapflightsfares deal was found by Cheapflights users on 8/3. 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 8/2011:15 am -
1 stop8h 14m
Mon 8/248:26 pm -
1 stop15h 38m
Deal found 8/3![Frontier logo]()
$269
This Booking.com deal was found by Cheapflights users on 8/3. 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.
Fri 8/2810:49 am -
1 stop6h 42m
Mon 8/318:26 pm -
1 stop15h 38m
Deal found 8/3![Frontier logo]()
$270
This eDestinos deal was found by Cheapflights users on 8/2. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:00 am -
1 stop11h 31m
Tue 8/1810:24 pm -
1 stop19h 30m
Deal found 8/2![Frontier logo]()
$271
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 August 7, 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 August 7, 2026.
This Southwest deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/29:05 am -
2 stops6h 55m
Wed 9/97:35 am -
2 stops6h 55m
Deal found 8/3![Southwest logo]()
$381
This Delta deal was found by Cheapflights users on 8/6. 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 10/145:03 pm -
1 stop5h 27m
Sat 10/176:35 am -
1 stop7h 47m
Deal found 8/6![Delta logo]()
$385
This United Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/41:56 pm -
1 stop6h 03m
Sun 9/69:10 am -
2 stops11h 01m
Deal found 8/4![United Airlines logo]()
$393
This Kiwi.com deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1010:49 am -
1 stop6h 05m
Wed 8/127:49 pm -
2 stops21h 25m
Deal found 8/2![Frontier logo]()
$458
This Delta deal was found by Cheapflights users on 8/6. 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 10/145:03 pm -
1 stop5h 27m
Thu 10/156:35 am -
1 stop7h 46m
Deal found 8/6![Delta logo]()
$385
This United Airlines deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/281:18 pm -
2 stops7h 21m
Mon 8/315:30 am -
2 stops8h 42m
Deal found 8/5![United Airlines logo]()
$413
This Southwest deal was found by Cheapflights users on 8/5. 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 10/185:10 pm -
2 stops6h 40m
Thu 10/223:55 pm -
2 stops7h 45m
Deal found 8/5![Southwest logo]()
$441
This United Airlines deal was found by Cheapflights users on 8/6. 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 9/11:18 pm -
2 stops7h 21m
Thu 9/35:30 am -
2 stops8h 42m
Deal found 8/6![United Airlines logo]()
$438
This United Airlines deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:00 am -
1 stop7h 56m
Tue 9/89:22 am -
1 stop6h 39m
Deal found 8/5![United Airlines logo]()
$455
This United Airlines deal was found by Cheapflights users on 8/5. 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 9/31:18 pm -
1 stop5h 34m
Sun 9/64:45 pm -
1 stop6h 08m
Deal found 8/5![United Airlines logo]()
$460
This United Airlines deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:00 am -
1 stop7h 56m
Mon 9/75:59 pm -
1 stop6h 00m
Deal found 8/5![United Airlines logo]()
$460
This United Airlines deal was found by Cheapflights users on 8/3. 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 9/15:00 am -
1 stop5h 43m
Sat 9/59:00 am -
1 stop8h 41m
Deal found 8/3![United Airlines logo]()
$460
Last-minute flights from Ontario to San AntonioDiscover last-minute flight deals from Ontario to San Antonio. Data last updated August 7, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to San Antonio. Data last updated August 7, 2026 and is based on user searches.
This eDestinos deal was found by Cheapflights users on 8/3. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:00 am -
1 stop11h 31m
Tue 8/1810:24 pm -
1 stop19h 30m
Deal found 8/3![Frontier logo]()
$271
This Cheapflightsfares deal was found by Cheapflights users on 8/3. 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 8/2011:15 am -
1 stop8h 14m
Mon 8/248:26 pm -
1 stop15h 38m
Deal found 8/3![Frontier logo]()
$269
This Booking.com deal was found by Cheapflights users on 8/4. 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 8/256:00 am -
1 stop11h 31m
Tue 9/110:24 pm -
1 stop19h 25m
Deal found 8/4![Frontier logo]()
$258
This Cheapflightsfares deal was found by Cheapflights users on 8/3. 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 8/273:40 pm -
1 stop27h 49m
Sun 8/3010:24 pm -
1 stop25h 03m
Deal found 8/3![Frontier logo]()
$268
This Cheapflightsfares deal was found by Cheapflights users on 8/4. 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 8/2810:49 am -
1 stop6h 42m
Sat 8/298:26 pm -
1 stop15h 38m
Deal found 8/4![Frontier logo]()
$260
This Booking.com deal was found by Cheapflights users on 8/3. 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.
Fri 8/2810:49 am -
1 stop6h 42m
Mon 8/318:26 pm -
1 stop15h 38m
Deal found 8/3![Frontier logo]()
$270
This Frontier deal was found by Cheapflights users on 8/3. 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 8/2911:50 am -
1 stop7h 39m
Mon 8/3110:24 pm -
1 stop19h 25m
Deal found 8/3![Frontier logo]()
$247
This Booking.com deal was found by Cheapflights users on 8/5. 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.
Sat 8/2911:50 am -
1 stop7h 39m
Tue 9/110:24 pm -
1 stop19h 25m
Deal found 8/5![Frontier logo]()
$252
This Cheapflightsfares deal was found by Cheapflights users on 8/3. 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 9/13:40 pm -
1 stop27h 49m
Tue 9/810:24 pm -
1 stop20h 35m
Deal found 8/3![Frontier logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Sun 9/610:49 am -
1 stop6h 42m
Sun 9/1312:39 pm -
1 stop20h 25m
Deal found 8/7![Frontier logo]()
$267
This Frontier deal was found by Cheapflights users on 8/3. 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 9/1011:45 am -
1 stop5h 40m
Fri 9/118:20 pm -
1 stop5h 27m
Deal found 8/3![Frontier logo]()
$264
This Expedia deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/248:24 pm -
1 stop13h 20m
Mon 9/289:50 pm -
1 stop13h 19m
Deal found 8/4![Frontier logo]()
$246
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 August 7, 2026.
Search for one-way flight options from Ontario to San Antonio. Find affordable one-way fares based on user searches. Data last updated August 7, 2026.
This Super.com deal was found by Cheapflights users on 8/4. 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 9/2111:45 am -
1 stop5h 40m
Deal found 8/4![Frontier logo]()
$121
This Cheapflightsfares deal was found by Cheapflights users on 8/3. 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 9/2211:45 am -
1 stop5h 40m
Deal found 8/3![Frontier logo]()
$122
This Frontier deal was found by Cheapflights users on 8/4. 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 10/172:58 pm -
1 stop4h 48m
Deal found 8/4![Frontier logo]()
$123
This Trip.com deal was found by Cheapflights users on 8/3. 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.
Sun 9/66:00 am -
1 stop11h 31m
Deal found 8/3![Frontier logo]()
$124
This Super.com deal was found by Cheapflights users on 8/3. 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 9/83:40 pm -
1 stop20h 40m
Deal found 8/3![Frontier logo]()
$127
This Frontier deal was found by Cheapflights users on 8/3. 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 12/1010:05 am -
1 stop8h 21m
Deal found 8/3![Frontier logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2111:50 am -
1 stop7h 39m
Deal found 8/7![Frontier logo]()
$133
This Trip.com deal was found by Cheapflights users on 8/6. 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 8/263:40 pm -
1 stop27h 49m
Deal found 8/6![Frontier logo]()
$138
This Super.com deal was found by Cheapflights users on 8/3. 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.
Fri 9/1111:45 am -
1 stop5h 40m
Deal found 8/3![Frontier logo]()
$139
This Trip.com deal was found by Cheapflights users on 8/6. 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.
Sun 10/112:58 pm -
1 stop18h 50m
Deal found 8/6![Frontier logo]()
$141
This Cheapflightsfares deal was found by Cheapflights users on 8/3. 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 12/410:32 pm -
1 stop19h 54m
Deal found 8/3![Frontier logo]()
$145
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 August 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $244 (Cheapflightsfares) |
One-way from | $121 (Super.com) |
Popular in | March |
Cheapest in | October |
Average price | $314 |
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 August 7, 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 Ontario - SAT San Antonio
ONTSAT
Ontario
Wed 9/2
9:05 am-6:00 pm
2 stops6h 55m
San Antonio
Wed 9/9
7:35 am-12:30 pm
2 stops6h 55m
$381
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Wed 10/14
5:03 pm-12:30 am
1 stop5h 27m
San Antonio
Sat 10/17
6:35 am-12:22 pm
1 stop7h 47m
$385
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Wed 10/14
5:03 pm-12:30 am
1 stop5h 27m
San Antonio
Thu 10/15
6:35 am-12:21 pm
1 stop7h 46m
$385
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Fri 9/4
1:56 pm-9:59 pm
1 stop6h 03m
San Antonio
Sun 9/6
9:10 am-6:11 pm
2 stops11h 01m
$393
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Fri 8/28
1:18 pm-10:39 pm
2 stops7h 21m
San Antonio
Mon 8/31
5:30 am-12:12 pm
2 stops8h 42m
$413
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Tue 9/1
1:18 pm-10:39 pm
2 stops7h 21m
San Antonio
Thu 9/3
5:30 am-12:12 pm
2 stops8h 42m
$438
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Sun 10/18
5:10 pm-1:50 am
2 stops6h 40m
San Antonio
Thu 10/22
3:55 pm-9:40 pm
2 stops7h 45m
$441
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Sat 9/5
8:00 am-5:56 pm
1 stop7h 56m
San Antonio
Tue 9/8
9:22 am-2:01 pm
1 stop6h 39m
$455
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Mon 8/10
10:49 am-6:54 pm
1 stop6h 05m
San Antonio
Wed 8/12
7:49 pm-3:14 pm
2 stops21h 25m
$458
Quickest round-trip
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Thu 9/3
1:18 pm-8:52 pm
1 stop5h 34m
San Antonio
Sun 9/6
4:45 pm-8:53 pm
1 stop6h 08m
$460
Showing 1-10 of 23 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 August.
| 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 Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 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
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How far ahead should I book a flight from Ontario to San Antonio?
The best time to book flights from Ontario to San Antonio is 63 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, October is the cheapest month in which you can book a flight from Ontario to San Antonio (average of $204). Flying from Ontario to San Antonio in March is currently the most expensive (average of $406). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ONT to SAT?
Find hourly flight availability from Ontario to San Antonio. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 7, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to San Antonio as you normally would.
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 57% 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 August 7, 2026.
See what other customers who have flown with Southwest,Delta, andUnited 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.
Overall
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Overall
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
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 August 7, 2026.
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Top 5 airlines flying from Ontario to San Antonio
Discover the top 5 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 August 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$135 | Average$279 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$226 | Average$398 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$256 | Average$466 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$270 | Average$336 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$293 | Average$406 | FlexibilityNo cancel fee | On-time63% |