$99+ Cheap flights from Ontario to San Antonio (ONT - SAT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SAT
Dec 4 — Dec 111
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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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 November 4, 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 November 4, 2026.
This Gotogate deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:00 am -
1 stop10h 01m
Sat 12/126:47 pm -
1 stop5h 30m
Deal found 10/31![Frontier logo]()
$184
This Booking.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/311:30 am -
1 stop6h 26m
Mon 12/710:52 pm -
1 stop21h 39m
Deal found 10/30![Frontier logo]()
$185
This Trip.com deal was found by Cheapflights users on 10/31. 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 12/26:00 am -
1 stop9h 59m
Mon 12/710:52 pm -
1 stop21h 39m
Deal found 10/31![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/811:00 am -
1 stop8h 57m
Tue 12/1510:52 pm -
1 stop14h 59m
Deal found 11/3![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/48:00 am -
1 stop11h 01m
Tue 12/810:52 pm -
1 stop14h 59m
Deal found 11/3![Frontier logo]()
$197
This Cheapflightsfares deal was found by Cheapflights users on 11/2. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/16:00 am -
1 stop9h 59m
Sat 12/510:52 pm -
1 stop14h 59m
Deal found 11/2![Frontier logo]()
$198
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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.
Thu 12/1011:30 am -
1 stop6h 32m
Sat 12/126:47 pm -
1 stop5h 30m
Deal found 11/4![Frontier logo]()
$201
This Cheapflightsfares deal was found by Cheapflights users on 11/2. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/48:00 am -
1 stop11h 01m
Mon 12/710:52 pm -
1 stop21h 39m
Deal found 11/2![Frontier logo]()
$202
This Booking.com deal was found by Cheapflights users on 11/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1011:30 am -
1 stop6h 32m
Tue 12/156:47 pm -
1 stop5h 30m
Deal found 11/2![Frontier logo]()
$203
This Mytrip deal was found by Cheapflights users on 11/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1011:30 am -
1 stop6h 32m
Mon 12/148:47 pm -
1 stop5h 33m
Deal found 11/2![Frontier logo]()
$205
This Trip.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/511:00 am -
1 stop8h 57m
Mon 12/710:52 pm -
1 stop14h 59m
Deal found 10/31![Frontier logo]()
$206
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 November 4, 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 November 4, 2026.
This Orbitz deal was found by Cheapflights users on 10/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/252:01 pm -
1 stop23h 17m
Mon 11/3010:11 pm -
1 stop16h 28m
Deal found 10/30![Frontier logo]()
$240
This United Airlines deal was found by Cheapflights users on 10/31. 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 1/225:00 am -
1 stop5h 58m
Fri 1/225:55 pm -
1 stop6h 20m
Deal found 10/31![United Airlines logo]()
$350
This Southwest deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/227:40 am -
2 stops6h 20m
Fri 1/225:05 pm -
1 stop4h 40m
Deal found 10/31![Southwest logo]()
$387
This Frontier deal was found by Cheapflights users on 10/30. 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 2/58:02 am -
2 stops9h 25m
Mon 2/88:22 pm -
2 stops12h 45m
Deal found 10/30![Frontier logo]()
$463
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Wed 12/25:45 am -
1 stop5h 21m
Sat 12/55:15 am -
3 stops14h 21m
Deal found 11/3![United Airlines logo]()
$475
This Southwest deal was found by Cheapflights users on 10/31. 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 2/109:00 am -
2 stops7h 30m
Mon 2/1511:25 am -
2 stops7h 20m
Deal found 10/31![Southwest logo]()
$486
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Thu 11/265:00 am -
2 stops11h 03m
Thu 12/311:47 am -
2 stops10h 51m
Deal found 11/3![United Airlines logo]()
$475
This United Airlines deal was found by Cheapflights users on 11/1. 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 12/116:40 pm -
2 stops14h 11m
Mon 12/145:15 am -
3 stops14h 21m
Deal found 11/1![United Airlines logo]()
$481
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Sat 12/125:00 am -
2 stops8h 48m
Wed 12/165:15 am -
3 stops14h 21m
Deal found 11/4![United Airlines logo]()
$517
Last-minute flights from Ontario to San AntonioDiscover last-minute flight deals from Ontario to San Antonio. Data last updated November 4, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to San Antonio. Data last updated November 4, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 11/2. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/16:00 am -
1 stop9h 59m
Sat 12/510:52 pm -
1 stop14h 59m
Deal found 11/2![Frontier logo]()
$198
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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.
Tue 12/111:30 am -
1 stop28h 29m
Thu 12/38:41 pm -
1 stop5h 36m
Deal found 11/4![Frontier logo]()
$201
This Trip.com deal was found by Cheapflights users on 10/31. 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 12/26:00 am -
1 stop9h 59m
Mon 12/710:52 pm -
1 stop21h 39m
Deal found 10/31![Frontier logo]()
$190
This Booking.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/311:30 am -
1 stop6h 26m
Mon 12/710:52 pm -
1 stop21h 39m
Deal found 10/30![Frontier logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/48:00 am -
1 stop11h 01m
Tue 12/810:52 pm -
1 stop14h 59m
Deal found 11/3![Frontier logo]()
$197
This Cheapflightsfares deal was found by Cheapflights users on 11/2. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/48:00 am -
1 stop11h 01m
Mon 12/710:52 pm -
1 stop21h 39m
Deal found 11/2![Frontier logo]()
$202
This Trip.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/511:00 am -
1 stop8h 57m
Mon 12/710:52 pm -
1 stop14h 59m
Deal found 10/31![Frontier logo]()
$206
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/811:00 am -
1 stop8h 57m
Tue 12/1510:52 pm -
1 stop14h 59m
Deal found 11/3![Frontier logo]()
$192
This Gotogate deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:00 am -
1 stop10h 01m
Sat 12/126:47 pm -
1 stop5h 30m
Deal found 10/31![Frontier logo]()
$184
This Booking.com deal was found by Cheapflights users on 11/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1011:30 am -
1 stop6h 32m
Tue 12/156:47 pm -
1 stop5h 30m
Deal found 11/2![Frontier logo]()
$203
This Mytrip deal was found by Cheapflights users on 11/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1011:30 am -
1 stop6h 32m
Mon 12/148:47 pm -
1 stop5h 33m
Deal found 11/2![Frontier logo]()
$205
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 November 4, 2026.
Search for one-way flight options from Ontario to San Antonio. Find affordable one-way fares based on user searches. Data last updated November 4, 2026.
This Super.com deal was found by Cheapflights users on 11/3. 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.
Wed 11/252:01 pm -
1 stop5h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$99
This Frontier deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/162:53 pm -
1 stop5h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Frontier logo]()
$100
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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.
Thu 12/311:30 am -
1 stop6h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Frontier logo]()
$101
This Cheapflightsfares deal was found by Cheapflights users on 10/31. 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 11/268:15 am -
1 stop5h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Frontier logo]()
$103
This Super.com deal was found by Cheapflights users on 11/1. 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 12/2310:48 pm -
1 stop11h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$104
This Super.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/236:30 am -
1 stop10h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Frontier logo]()
$105
This Super.com deal was found by Cheapflights users on 11/3. 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.
Thu 12/2410:30 pm -
1 stop10h 23m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$108
This Mytrip deal was found by Cheapflights users on 11/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/302:01 pm -
1 stop27h 07m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$110
This Trip.com deal was found by Cheapflights users on 10/30. 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 1/266:30 am -
1 stop10h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Frontier logo]()
$111
This Super.com deal was found by Cheapflights users on 11/3. 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.
Mon 12/711:30 am -
1 stop28h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$115
This Super.com deal was found by Cheapflights users on 11/3. 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.
Sat 11/212:01 pm -
1 stop5h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$118
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 November 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $184 (Gotogate) |
One-way from | $99 (Super.com) |
Popular in | November |
Cheapest in | January |
Average price | $422 |
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 7,457,451 searches. Data last updated November 4, 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
Fri 11/20
2:01 pm-9:16 pm
1 stop5h 15m
San Antonio
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$140
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Tue 11/10
11:52 am-7:25 pm
1 stop5h 33m
San Antonio
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$140
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Thu 11/26
6:00 am-1:39 pm
1 stop5h 39m
San Antonio
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$178
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Thu 11/12
8:35 pm-7:14 pm
2 stops20h 39m
San Antonio
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$207
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Thu 11/26
5:00 am-6:03 pm
2 stops11h 03m
San Antonio
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$238
Quickest round-trip
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Mon 11/30
4:25 pm-11:09 pm
1 stop4h 44m
San Antonio
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$240
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Wed 11/25
2:01 pm-3:18 pm
1 stop23h 17m
San Antonio
Mon 11/30
10:11 pm-12:39 pm
1 stop16h 28m
$240
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Fri 1/1
5:55 am-3:35 pm
1 stop7h 40m
San Antonio
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$272
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Wed 3/10
9:03 am-11:43 pm
2 stops12h 40m
San Antonio
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$274
OntarioSan Antonio
ONT Ontario - SAT San Antonio
ONTSAT
Ontario
Wed 11/11
5:07 pm-7:25 pm
2 stops24h 18m
San Antonio
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$275
Showing 1-10 of 18 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 November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| 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
Prices
More
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, January is the cheapest month in which you can book a flight from Ontario to San Antonio (average of $318). Flying from Ontario to San Antonio in November is currently the most expensive (average of $422). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Ontario to San Antonio?
Airfare is below average for this route at the moment.
Ontario to San Antonio flights typically cost between $291 and $466 in December.The cheapest round-trip price found within the last 5 days was $184 on Frontier (Dec 9-Dec 12).
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 45% 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 $261.
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 36m.
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 Las Vegas (LAS) offer the fastest connection on this route, with an average layover time of 0h 53m.
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 November 4, 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.
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Boarding
8.1
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Comfort
8.0
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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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 7,457,451 searches. Data last updated November 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$141 | Average$297 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$247 | Average$423 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$256 | Average$466 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$280 | Average$390 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$294 | Average$420 | FlexibilityNo cancel fee | On-time63% |