$49+ 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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SAT
Mar 10 — Mar 171
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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Best
Last-minute
One-way
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 February 8, 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 February 8, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 2/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/253:22 pm
ONT
- SAT
1 stop22h 25m
Frontier
Sat 2/287:56 pm
SAT
- ONT
1 stop14h 03m
Frontier
Deal found 2/5![Frontier logo]()
$137
This Cheapflightsfares deal was found by Cheapflights users on 2/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/263:24 pm
ONT
- SAT
1 stop16h 34m
Frontier
Mon 3/28:22 pm
SAT
- ONT
1 stop5h 37m
Frontier
Deal found 2/5![Frontier logo]()
$147
This Cheapflightsfares deal was found by Cheapflights users on 2/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:05 am
ONT
- SAT
1 stop11h 20m
Frontier
Sat 2/287:56 pm
SAT
- ONT
1 stop14h 03m
Frontier
Deal found 2/7![Frontier logo]()
$153
This Cheapflightsfares deal was found by Cheapflights users on 2/4. 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.
Wed 3/48:40 am
ONT
- SAT
1 stop6h 35m
Frontier
Wed 3/116:45 am
SAT
- ONT
1 stop19h 14m
Frontier
Deal found 2/4![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 2/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/267:22 pm
ONT
- SAT
1 stop12h 36m
Frontier
Sun 3/111:35 am
SAT
- ONT
1 stop27h 36m
Frontier
Deal found 2/5![Frontier logo]()
$174
This Cheapflightsfares deal was found by Cheapflights users on 2/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:20 am
ONT
- SAT
1 stop15h 59m
Frontier
Wed 4/153:14 pm
SAT
- ONT
1 stop18h 17m
Frontier
Deal found 2/7![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 2/6. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/112:59 am
ONT
- SAT
1 stop11h 40m
Frontier
Wed 5/63:14 pm
SAT
- ONT
1 stop10h 41m
Frontier
Deal found 2/6![Frontier logo]()
$180
This CheapOair deal was found by Cheapflights users on 2/8. 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.
Fri 4/106:20 am
ONT
- SAT
1 stop15h 59m
Frontier
Mon 4/136:45 am
SAT
- ONT
1 stop19h 11m
Frontier
Deal found 2/8![Frontier logo]()
$191
This Cheapflightsfares deal was found by Cheapflights users on 2/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/192:08 pm
ONT
- SAT
1 stop27h 29m
Frontier
Sun 2/2211:35 am
SAT
- ONT
1 stop27h 36m
Frontier
Deal found 2/7![Frontier logo]()
$200
This Expedia deal was found by Cheapflights users on 2/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/196:05 am
ONT
- SAT
1 stop11h 25m
Frontier
Sat 2/217:56 pm
SAT
- ONT
1 stop6h 03m
Frontier
Deal found 2/6![Frontier logo]()
$201
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 February 8, 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 February 8, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 2/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:44 am
ONT
- SAT
1 stop21h 56m
Frontier
Thu 4/303:14 pm
SAT
- ONT
1 stop10h 41m
Frontier
Deal found 2/7![Frontier logo]()
$200
This Delta deal was found by Cheapflights users on 2/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/265:09 pm
ONT
- SAT
1 stop5h 07m
Delta
Mon 3/305:55 pm
SAT
- ONT
1 stop7h 56m
Delta
Deal found 2/4![Delta logo]()
$281
This United Airlines deal was found by Cheapflights users on 2/4. 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.
Wed 4/86:49 pm
ONT
- SAT
2 stops11h 53m
United Airlines
Sat 4/114:17 pm
SAT
- ONT
1 stop7h 33m
United Airlines
Deal found 2/4![United Airlines logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 2/7. 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.
Mon 3/99:40 pm
ONT
- SAT
2 stops24h 37m
Frontier
Mon 3/1610:05 am
SAT
- ONT
1 stop15h 54m
Frontier
Deal found 2/7![Frontier logo]()
$208
This Delta deal was found by Cheapflights users on 2/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/410:25 pm
ONT
- SAT
1 stop9h 30m
Delta
Wed 4/85:55 pm
SAT
- ONT
1 stop7h 56m
Delta
Deal found 2/7![Delta logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 2/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:17 pm
ONT
- SAT
1 stop18h 30m
Frontier
Sun 3/86:45 am
SAT
- ONT
2 stops27h 21m
Frontier
Deal found 2/5![Frontier logo]()
$260
This Delta deal was found by Cheapflights users on 2/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/315:09 pm
ONT
- SAT
1 stop5h 07m
Delta
Wed 4/85:55 pm
SAT
- ONT
1 stop7h 56m
Delta
Deal found 2/7![Delta logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 2/7. 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.
Mon 3/166:15 am
ONT
- SAT
1 stop16h 02m
Frontier
Fri 3/206:45 am
SAT
- ONT
1 stop19h 14m
Frontier
Deal found 2/7![Frontier logo]()
$261
This Delta deal was found by Cheapflights users on 2/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/410:25 pm
ONT
- SAT
1 stop9h 30m
Delta
Tue 4/77:00 am
SAT
- ONT
1 stop7h 23m
Delta
Deal found 2/7![Delta logo]()
$281
This Delta deal was found by Cheapflights users on 2/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:00 am
ONT
- SAT
1 stop5h 35m
Delta
Thu 4/166:02 pm
SAT
- ONT
1 stop7h 42m
Delta
Deal found 2/5![Delta logo]()
$281
This Delta deal was found by Cheapflights users on 2/7. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/315:09 pm
ONT
- SAT
1 stop5h 07m
Delta
Tue 4/75:10 am
SAT
- ONT
1 stop8h 37m
Delta
Deal found 2/7![Delta logo]()
$281
Last-minute flights from Ontario to San AntonioDiscover last-minute flight deals from Ontario to San Antonio. Data last updated February 8, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to San Antonio. Data last updated February 8, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 2/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/196:05 am
ONT
- SAT
1 stop11h 25m
Frontier
Mon 2/238:22 pm
SAT
- ONT
1 stop27h 12m
Frontier
Deal found 2/7![Frontier logo]()
$200
This Expedia deal was found by Cheapflights users on 2/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/196:05 am
ONT
- SAT
1 stop11h 25m
Frontier
Sat 2/217:56 pm
SAT
- ONT
1 stop6h 03m
Frontier
Deal found 2/6![Frontier logo]()
$201
This Cheapflightsfares deal was found by Cheapflights users on 2/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/253:22 pm
ONT
- SAT
1 stop22h 25m
Frontier
Sat 2/287:56 pm
SAT
- ONT
1 stop14h 03m
Frontier
Deal found 2/5![Frontier logo]()
$137
This Cheapflightsfares deal was found by Cheapflights users on 2/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/263:24 pm
ONT
- SAT
1 stop16h 34m
Frontier
Mon 3/28:22 pm
SAT
- ONT
1 stop5h 37m
Frontier
Deal found 2/5![Frontier logo]()
$147
This Cheapflightsfares deal was found by Cheapflights users on 2/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:05 am
ONT
- SAT
1 stop11h 20m
Frontier
Sat 2/287:56 pm
SAT
- ONT
1 stop14h 03m
Frontier
Deal found 2/7![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 2/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/267:22 pm
ONT
- SAT
1 stop12h 36m
Frontier
Sun 3/111:35 am
SAT
- ONT
1 stop27h 36m
Frontier
Deal found 2/5![Frontier logo]()
$174
This Cheapflightsfares deal was found by Cheapflights users on 2/4. 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.
Wed 3/48:40 am
ONT
- SAT
1 stop6h 35m
Frontier
Wed 3/116:45 am
SAT
- ONT
1 stop19h 14m
Frontier
Deal found 2/4![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 2/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/53:24 pm
ONT
- SAT
1 stop17h 16m
Frontier
Thu 3/126:45 am
SAT
- ONT
1 stop19h 14m
Frontier
Deal found 2/5![Frontier logo]()
$203
This Cheapflightsfares deal was found by Cheapflights users on 2/6. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/116:15 am
ONT
- SAT
1 stop24h 51m
Frontier
Wed 3/256:45 am
SAT
- ONT
1 stop19h 14m
Frontier
Deal found 2/6![Frontier logo]()
$179
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 February 8, 2026.
Search for one-way flight options from Ontario to San Antonio. Find affordable one-way fares based on user searches. Data last updated February 8, 2026.
This Trip.com deal was found by Cheapflights users on 2/6. 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.
Mon 4/1312:59 am
ONT
- SAT
1 stop11h 20m
Frontier
Deal found 2/6![Frontier logo]()
$49
This Trip.com deal was found by Cheapflights users on 2/6. 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.
Tue 3/106:15 am
ONT
- SAT
1 stop16h 02m
Frontier
Deal found 2/6![Frontier logo]()
$60
This Trip.com deal was found by Cheapflights users on 2/5. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/66:15 am
ONT
- SAT
1 stop24h 51m
Frontier
Deal found 2/5![Frontier logo]()
$68
This Cheapflightsfares deal was found by Cheapflights users on 2/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/253:22 pm
ONT
- SAT
1 stop22h 25m
Frontier
Deal found 2/5![Frontier logo]()
$70
This Super.com deal was found by Cheapflights users on 2/6. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:40 am
ONT
- SAT
1 stop6h 35m
Frontier
Deal found 2/6![Frontier logo]()
$73
This Super.com deal was found by Cheapflights users on 2/5. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/267:22 pm
ONT
- SAT
1 stop12h 36m
Frontier
Deal found 2/5![Frontier logo]()
$79
This Trip.com deal was found by Cheapflights users on 2/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2112:59 am
ONT
- SAT
1 stop11h 20m
Frontier
Deal found 2/7![Frontier logo]()
$90
This Trip.com deal was found by Cheapflights users on 2/6. 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.
Tue 4/76:20 am
ONT
- SAT
1 stop15h 59m
Frontier
Deal found 2/6![Frontier logo]()
$91
This Trip.com deal was found by Cheapflights users on 2/7. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1912:59 am
ONT
- SAT
1 stop11h 20m
Frontier
Deal found 2/7![Frontier logo]()
$93
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 February 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $137 (Cheapflightsfares) |
One-way from | $49 (Trip.com) |
Popular in | May |
Cheapest in | October |
Average price | $351 |
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 February 8, 2026.
Use the filters below to find and compare flights from Ontario to San Antonio that are best for you.
Fly from
Ontario
Fly to
San Antonio
Route
Depart
Return
Price
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
Thu 4/16
11:44 am-11:40 am
1 stop21h 56m
San Antonio
Thu 4/30
3:14 pm-11:55 pm
1 stop10h 41m
$200
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
Mon 3/9
9:40 pm-12:17 am
2 stops24h 37m
San Antonio
Mon 3/16
10:05 am-11:59 pm
1 stop15h 54m
$208
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
Wed 2/25
7:17 pm-3:47 pm
1 stop18h 30m
San Antonio
Sun 3/8
6:45 am-8:06 am
2 stops27h 21m
$260
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
Mon 3/16
6:15 am-12:17 am
1 stop16h 02m
San Antonio
Fri 3/20
6:45 am-11:59 pm
1 stop19h 14m
$261
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
Thu 3/26
5:09 pm-12:16 am
1 stop5h 07m
San Antonio
Mon 3/30
5:55 pm-11:51 pm
1 stop7h 56m
$281
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
Sat 4/4
10:25 pm-9:55 am
1 stop9h 30m
San Antonio
Wed 4/8
5:55 pm-11:51 pm
1 stop7h 56m
$281
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
Tue 3/31
5:09 pm-12:16 am
1 stop5h 07m
San Antonio
Wed 4/8
5:55 pm-11:51 pm
1 stop7h 56m
$281
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
Sat 4/4
10:25 pm-9:55 am
1 stop9h 30m
San Antonio
Tue 4/7
7:00 am-12:23 pm
1 stop7h 23m
$281
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
Sat 4/11
6:00 am-1:35 pm
1 stop5h 35m
San Antonio
Thu 4/16
6:02 pm-11:44 pm
1 stop7h 42m
$281
OntarioSan Antonio
ONT - SAT
ONTSAT
Ontario
Tue 3/31
5:09 pm-12:16 am
1 stop5h 07m
San Antonio
Tue 4/7
5:10 am-11:47 am
1 stop8h 37m
$281
Showing 1-10 of 21 results
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 February.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| 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*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy- | Trust Score*1 star |
- 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 February 6, 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 July is currently the most expensive (average of $99). 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 80% 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 February 8, 2026.
See what other customers who have flown with Southwest, United Airlines, and American 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
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Boarding
8.1
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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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 February 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$104 | Average$174 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$110 | Average$234 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$200 | Average$369 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$236 | Average$387 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$256 | Average$378 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$270 | Average$380 | FlexibilityNo cancel fee | On-time69% |