$55+ Cheap flights from San Antonio to Ontario (SAT - ONT)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ONT
Nov 29 — Dec 61
1 adult, Economy
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Find cheap flights from San Antonio to Ontario with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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.Cheapflights Tip: The best prices from San Antonio to Ontario are usually found in February or August, booked 65 days in advance, depart on a Friday or Wednesday and return on a Wednesday
Find flight deals from San Antonio to Ontario
Cheapest flights from San Antonio to OntarioExplore the most affordable flight options available from San Antonio to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.
Explore the most affordable flight options available from San Antonio to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.
This CheapOair deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1310:46 pmSAT - ONT
1 stop10h 31mFrontier
Sat 11/156:53 amONT - SAT
1 stop5h 24mFrontier
Deal found 10/28![Frontier logo]()
$110
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 12/57:55 pmSAT - ONT
1 stop20h 30mFrontier
Thu 12/116:15 amONT - SAT
1 stop4h 41mFrontier
Deal found 10/30![Frontier logo]()
$128
This CheapOair deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/178:25 pmSAT - ONT
1 stop27h 02mFrontier
Sat 12/133:20 pmONT - SAT
1 stop25h 51mFrontier
Deal found 10/27![Frontier logo]()
$130
This CheapOair deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/83:12 pmSAT - ONT
1 stop10h 38mFrontier
Sat 11/158:00 amONT - SAT
1 stop5h 35mFrontier
Deal found 10/28![Frontier logo]()
$143
This CheapOair deal was found by Cheapflights users on 10/29. 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.
Thu 12/111:51 pmSAT - ONT
1 stop9h 26mFrontier
Fri 12/126:15 amONT - SAT
1 stop4h 41mFrontier
Deal found 10/29![Frontier logo]()
$163
This Frontier deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/154:20 pmSAT - ONT
1 stop6h 22mFrontier
Sun 11/166:00 amONT - SAT
1 stop5h 19mFrontier
Deal found 10/27![Frontier logo]()
$169
This Mytrip deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/207:00 amSAT - ONT
1 stop6h 11mFrontier
Thu 11/203:31 pmONT - SAT
1 stop17h 13mFrontier
Deal found 10/28![Frontier logo]()
$171
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:51 pmSAT - ONT
1 stop9h 26mFrontier
Wed 12/106:15 amONT - SAT
1 stop28h 41mFrontier
Deal found 10/30![Frontier logo]()
$174
This CheapOair deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/62:04 pmSAT - ONT
1 stop24h 47mFrontier
Sat 11/88:00 amONT - SAT
1 stop5h 35mFrontier
Deal found 10/28![Frontier logo]()
$176
This CheapOair deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/111:51 pmSAT - ONT
1 stop25h 19mFrontier
Sun 12/146:15 amONT - SAT
1 stop4h 41mFrontier
Deal found 10/28![Frontier logo]()
$189
Cheap flight deals from San Antonio to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 30, 2025.
Most accurate provider | CheapOair 3 stars |
|---|---|
Most trusted provider | CheapOair 3 stars |
Round-trip from | $110 (CheapOair) |
One-way from | $55 (CheapOair) |
Popular in | July |
Cheapest in | February |
Average price | $332 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Antonio to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from San Antonio to Ontario that are best for you.
Fly from
San Antonio
Fly to
Ontario
Route
Depart
Return
Price
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Mon 11/17
8:25 pm-9:27 pm
1 stop27h 02m
Ontario
Wed 11/19
8:45 am-6:45 pm
1 stop8h 00m
$110
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Sat 11/8
3:12 pm-11:50 pm
1 stop10h 38m
Ontario
Wed 11/12
8:00 am-1:19 pm
1 stop27h 19m
$143
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Thu 12/4
12:37 pm-9:17 pm
1 stop10h 40m
Ontario
Wed 12/10
6:15 am-2:11 pm
2 stops29h 56m
$202
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Mon 11/17
6:45 am-9:57 pm
2 stops17h 12m
Ontario
Wed 11/19
8:45 am-6:45 pm
1 stop8h 00m
$210
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Sun 11/16
8:25 pm-11:50 pm
1 stop5h 25m
Ontario
Mon 11/17
6:53 am-7:30 pm
1 stop10h 37m
$222
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Sun 12/14
6:10 pm-2:04 pm
1 stop21h 54m
Ontario
Sun 12/21
6:37 pm-5:35 am
1 stop8h 58m
$233
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Thu 11/27
2:08 pm-9:06 pm
1 stop8h 58m
Ontario
Mon 12/1
5:06 pm-1:17 pm
1 stop18h 11m
$246
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Thu 11/6
10:46 pm-7:17 am
1 stop10h 31m
Ontario
Mon 11/10
6:53 am-7:30 pm
1 stop10h 37m
$260
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Sat 11/8
3:12 pm-11:50 pm
1 stop10h 38m
Ontario
Mon 11/10
6:53 am-7:30 pm
1 stop10h 37m
$260
San AntonioOntario
SAT - ONT
SATONT
San Antonio
Fri 11/14
8:10 pm-12:37 pm
1 stop18h 27m
Ontario
Tue 11/18
8:00 am-6:45 pm
2 stops32h 45m
$263
Showing 1-10 of 22 results
Compare providers for flights from San Antonio to Ontario
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Antonio to Ontario in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on San Antonio-Ontario flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on San Antonio-Ontario flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from San Antonio-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Antonio-Ontario flights, Cheapflights users trust CheapOair the most. CheapOair has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Antonio-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from San Antonio to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from San Antonio with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from San Antonio to Ontario
Prices
More
How far ahead should I book a flight from San Antonio to Ontario?
Use this chart to determine the optimal time to book a round-trip flight from San Antonio to Ontario. Price data was last updated on October 24, 2025.
Booking 64 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Antonio to Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from San Antonio to Ontario?
Currently, September is the cheapest month in which you can book a flight from San Antonio to Ontario (average of $60). Flying from San Antonio to Ontario in March is currently the most expensive (average of $108). 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 SAT to ONT?
Find hourly flight availability from San Antonio to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.
One of the essential ways to save on airfare from San Antonio to Ontario is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 32% on airfare.
What’s the top layover airport for flights from San Antonio to Ontario?
Share of 1-stop round-trip flights from San Antonio to Ontario chosen by Cheapflights users in the past 12 months, using the same layover each way.
Phoenix (PHX) – chosen by Cheapflights users on 50% of 1-stop itineraries from San Antonio to Ontario on Cheapflights.
What’s the fastest layover option from San Antonio to Ontario?
Shortest average travel time for 1-stop one-way flights from San Antonio to Ontario, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Phoenix (PHX) have the shortest average one-way travel time for 1-stop routes: 5h 10m.
What’s the fastest layover option from San Antonio to Ontario?
Shortest average travel time for 1-stop one-way flights from San Antonio to Ontario, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Phoenix (PHX) have the shortest average one-way travel time for 1-stop routes: 5h 10m.
Which airport typically offers the quickest layover for flights from San Antonio to Ontario?
Average layover duration for 1-stop one-way flights from San Antonio to Ontario, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Phoenix (PHX) offer the fastest connection on this route, with an average layover time of 1h 15m.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated October 30, 2025.
Read through reviews of airlines operating flights from San Antonio to Ontario, such as Southwest, Delta, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Overall
8.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Related info for your journey
Find useful and relevant information for your journey from San Antonio to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for San Antonio to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from San Antonio to Ontario
Discover the top 6 airlines that operate flights from San Antonio to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$111 | Average$187 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$115 | Average$236 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$158 | Average$256 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$236 | Average$365 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$295 | Average$386 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$301 | Average$446 | FlexibilityNo cancel fee | On-time69% |