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$89+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ONT
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
1 adult, Economy
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Cheapflights Tip: The best prices from San Antonio to Ontario are usually found in February or August, booked 52 days in advance, depart on a Friday or Wednesday and return on a Wednesday

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 April 15, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$188
(Mytrip)

One-way from

$89
(Frontier)

Popular in

October

Cheapest in

February

Average price

$412
Provider with most accurate pricing for San Antonio-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Antonio-Ontario flights.
Search Deals
From San Antonio to Ontario
Search Deals
One-way flight from San Antonio to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($23 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
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Find flight deals from San Antonio to Ontario

Cheapest flights from San Antonio to Ontario
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 April 15, 2025.

This Booking.com deal was found by Cheapflights users on 4/14. 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 4/152:44 pmSAT - ONT
1 stop25h 43mFrontier
Mon 4/2112:59 amONT - SAT
1 stop13h 53mFrontier
Deal found 4/14$188
This Orbitz deal was found by Cheapflights users on 4/14. 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.
Fri 5/163:22 pmSAT - ONT
1 stop10h 37mMultiple Airlines
Tue 5/207:20 pmONT - SAT
1 stop7h 50mMultiple Airlines
Deal found 4/14$294
This Delta deal was found by Cheapflights users on 4/14. 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 6/246:03 pmSAT - ONT
1 stop7h 43mDelta
Tue 7/810:59 pmONT - SAT
1 stop8h 40mDelta
Deal found 4/14$317
This Southwest deal was found by Cheapflights users on 4/14. 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.
Tue 8/196:40 amSAT - ONT
1 stop5h 30mSouthwest
Tue 8/265:45 amONT - SAT
2 stops9h 40mSouthwest
Deal found 4/14$322
This United Airlines deal was found by Cheapflights users on 4/13. 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.
Mon 5/126:06 pmSAT - ONT
1 stop5h 54mUnited Airlines
Mon 5/196:48 pmONT - SAT
2 stops11h 43mUnited Airlines
Deal found 4/13$324
This American Airlines deal was found by Cheapflights users on 4/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/157:34 pmSAT - ONT
1 stop6h 09mAmerican Airlines
Tue 5/201:14 pmONT - SAT
1 stop5h 20mAmerican Airlines
Deal found 4/13$342
This Alaska Airlines deal was found by Cheapflights users on 4/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/66:35 amSAT - ONT
1 stop10h 57mAlaska Airlines
Sat 5/106:00 amONT - SAT
1 stop15h 59mAlaska Airlines
Deal found 4/13$345

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 April 15, 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

Tue 4/29

5:42 pm-11:59 pm

1 stop8h 17m

Ontario

Wed 4/30

12:10 pm-5:35 pm

1 stop27h 25m

$188

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Fri 5/30

6:10 pm-11:42 pm

1 stop7h 32m

Ontario

Tue 6/3

6:00 am-1:45 pm

1 stop5h 45m

$301

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Sat 5/10

6:40 am-10:10 am

1 stop5h 30m

Ontario

Mon 5/12

2:55 pm-11:25 pm

2 stops6h 30m

$323

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Mon 5/12

6:06 pm-10:00 pm

1 stop5h 54m

Ontario

Mon 5/19

6:48 pm-8:31 am

2 stops11h 43m

$324

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Tue 6/3

8:34 pm-11:43 pm

1 stop5h 09m

Ontario

Thu 6/26

12:59 am-8:25 am

1 stop5h 26m

$336

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Tue 5/6

6:35 am-3:32 pm

1 stop10h 57m

Ontario

Sat 5/10

6:00 am-11:59 pm

1 stop15h 59m

$345

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Sat 5/10

6:35 am-3:32 pm

1 stop10h 57m

Ontario

Sun 5/11

12:59 am-2:17 pm

1 stop11h 18m

$371

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Tue 4/29

5:42 pm-11:59 pm

1 stop8h 17m

$89

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Tue 5/6

6:17 pm-11:41 pm

1 stop7h 24m

$143

San AntonioOntario

SAT - ONT

SATONT

San Antonio

Tue 5/13

6:35 am-3:32 pm

1 stop10h 57m

$164

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/13

Showing 1-10 of 13 results
1
2

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
MytripPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Antonio-Ontario flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on San Antonio-Ontario flight deals on Cheapflights vs. Mytrip >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 Mytrip the most. Mytrip 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

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 April 11, 2025.

Booking 52 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, August is the cheapest month in which you can book a flight from San Antonio to Ontario (average of $246). Flying from San Antonio to Ontario in March is currently the most expensive (average of $328). 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 April 15, 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 33% on airfare.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 April 15, 2025.
To help decide which airline to fly from San Antonio to Ontario, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,871 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Entertainment

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,871 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Entertainment

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,279 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Entertainment

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Entertainment

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Hawaiian Airlines
7.9
Good
2,374 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Entertainment

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,656 reviews
Alaska Airlines
8.0
Very good
9,871 reviews

Comfort

7.9

Food

7.1

Crew

8.5

Entertainment

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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.

  • What are the cheapest airlines flying from San Antonio to Ontario round-trip?

    Our cheapest airline available from San Antonio to Ontario is Frontier. Our recent data shows that you can find tickets from as low as $188 on this airline. Additional options worth looking into are Delta and Southwest, starting at $301 and $323 round-trip. Users have found that Frontier is 42% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from San Antonio to Ontario one-way?

    $89 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Delta and Alaska Airlines, with prices starting from $143 and $164, respectively.

  • Can I find deals for flights from San Antonio to Ontario that include hotel bookings?

    Yes. In addition to deals on San Antonio to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Antonio to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Antonio to Ontario.

  • Can I find deals for business class flights from San Antonio to Ontario?

    Yes. Cheapflights offers flight deals from San Antonio to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Antonio to Ontario?

    Currently, August is the cheapest month in which you can book a flight from San Antonio to Ontario (average of $246). Flying from San Antonio to Ontario in March is currently the most expensive (average of $328). 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.

See more FAQs

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Alternative routes for San Antonio to Ontario

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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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$43Average$165FlexibilityNo cancel feeOn-time65%
FrontierCheapest$118Average$202FlexibilityNo cancel feeOn-time62%
DeltaCheapest$173Average$409FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$256Average$366FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$301Average$386FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$326Average$436FlexibilityNo cancel feeOn-time69%

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