What’s the top layover airport for flights from Ontario to San Antonio?

Phoenix (PHX) – chosen by Cheapflights users on 60% of 1-stop itineraries from Ontario to San Antonio on Cheapflights.

What’s the fastest layover option from Ontario to San Antonio?

Flights via Phoenix (PHX) have the shortest average one-way travel time for 1-stop routes: 4h 25m.

What’s the cheapest layover airport for flights from Ontario to San Antonio?

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $130.

Which airport typically offers the quickest layover for flights from Ontario to San Antonio?

Flights via Phoenix (PHX) offer the fastest connection on this route, with an average layover time of 0h 41m.

How long is the flight from Ontario to San Antonio?

For as low as $149, Frontier can have you in San Antonio from Ontario in 8h 46m. The distance between Ontario and San Antonio is about 1163 mi.

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

According to our current data, Frontier ($110), Spirit Airlines ($118), and Delta ($200) offers the cheapest pricing from Ontario to San Antonio. Frontier is 66% cheaper than the average price of flights available within the next 90 days to this destination.

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

The cheapest airlines for a one-way flight from Ontario to San Antonio are Frontier ($71), United Airlines ($109), and American Airlines ($128).

In terms of precipitation, rainfall in San Antonio ranges from 1.6 - 3.7 inches per month. May is typically the wettest month, when rainfall can reach 3.7 in. December is typically the driest time to visit San Antonio when rainfall is around 1.6 in.

If weather is an important factor for your trip to San Antonio, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

What are the most popular airlines that fly from Ontario to San Antonio?

When booking a flight from Ontario to San Antonio, you may want to consider flying on American Airlines, Southwest or Frontier as they are the most popular for this route.

What is the cheapest time of day to fly from ONT to SAT?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to San Antonio as you normally would.

Most accurate provider : When it comes to deals on Ontario-San Antonio flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on Ontario-San Antonio flight deals on Cheapflights vs. Mytrip >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 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 Ontario-San Antonio flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

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

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

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

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

$61+ Flights from Ontario to San Antonio

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1. Tell us where you want to go

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Cheap flight deals from Ontario to San Antonio

Cheapest flights from Ontario to San Antonio
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 December 29, 2025.

Tue 12/306:00 amONT - SAT

1 stop5h 16mFrontier

Fri 1/212:18 pmSAT - ONT

1 stop13h 41mFrontier

Deal found 12/26

$361

Sat 12/276:45 amONT - SAT

1 stop15h 32mFrontier

Wed 12/312:09 pmSAT - ONT

1 stop11h 50mFrontier

Deal found 12/26

$463

Tue 12/306:00 amONT - SAT

1 stop5h 16mFrontier

Sun 1/42:01 pmSAT - ONT

1 stop5h 41mFrontier

Deal found 12/26

$466

Mon 12/296:00 pmONT - SAT

1 stop17h 16mFrontier

Thu 1/12:09 pmSAT - ONT

1 stop11h 50mFrontier

Deal found 12/26

$468

Sun 12/286:00 amONT - SAT

1 stop5h 16mMultiple Airlines

Sat 1/1710:35 amSAT - ONT

2 stops29h 13mMultiple Airlines

Deal found 12/26

$494

Tue 12/306:00 amONT - SAT

1 stop5h 16mFrontier

Mon 1/52:01 pmSAT - ONT

1 stop27h 08mFrontier

Deal found 12/27

$536

Tue 12/306:17 pmONT - SAT

1 stop9h 18mMultiple Airlines

Fri 1/25:10 amSAT - ONT

1 stop13h 59mMultiple Airlines

Deal found 12/28

$658

Tue 12/306:17 pmONT - SAT

1 stop9h 18mMultiple Airlines

Mon 1/55:56 pmSAT - ONT

2 stops30h 16mMultiple Airlines

Deal found 12/27

$662

Sun 12/287:05 amONT - SAT

1 stop8h 12mDelta

Sat 1/177:35 amSAT - ONT

1 stop6h 41mDelta

Deal found 12/26

$664

Mon 12/296:00 pmONT - SAT

1 stop17h 16mMultiple Airlines

Wed 12/315:10 amSAT - ONT

1 stop14h 05mMultiple Airlines

Deal found 12/27

$669

Best flights from Ontario to San Antonio
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 December 29, 2025.

Fri 1/2310:18 amONT - SAT

1 stop8h 46mFrontier

Sun 1/251:15 pmSAT - ONT

1 stop27h 26mFrontier

Deal found 12/29

$149

Sat 1/1712:41 pmONT - SAT

1 stop8h 42mDelta

Sun 1/187:35 amSAT - ONT

1 stop6h 41mDelta

Deal found 12/27

$281

Sat 1/3111:53 amONT - SAT

1 stop27h 52mAlaska Airlines

Wed 2/46:46 pmSAT - ONT

1 stop31h 10mAlaska Airlines

Deal found 12/27

$325

Wed 3/2510:03 pmONT - SAT

1 stop10h 37mMultiple Airlines

Wed 4/810:26 amSAT - ONT

2 stops36h 51mMultiple Airlines

Deal found 12/29

$357

Thu 1/296:20 amONT - SAT

1 stop11h 13mFrontier

Sun 2/81:15 pmSAT - ONT

1 stop8h 17mFrontier

Deal found 12/29

$200

Sun 2/156:10 amONT - SAT

1 stop10h 12mFrontier

Thu 2/198:25 pmSAT - ONT

2 stops37h 01mFrontier

Deal found 12/28

$223

Sat 2/286:00 amONT - SAT

1 stop11h 01mFrontier

Sat 3/711:35 amSAT - ONT

1 stop11h 28mFrontier

Deal found 12/28

$250

Thu 2/126:05 amONT - SAT

1 stop11h 25mFrontier

Mon 2/169:39 pmSAT - ONT

1 stop17h 32mFrontier

Deal found 12/27

$251

Sun 2/16:00 amONT - SAT

1 stop9h 45mAlaska Airlines

Sat 2/76:46 pmSAT - ONT

1 stop31h 10mAlaska Airlines

Deal found 12/27

$344

Thu 1/224:03 pmONT - SAT

1 stop23h 42mAlaska Airlines

Sat 1/246:46 pmSAT - ONT

1 stop18h 13mAlaska Airlines

Deal found 12/27

$344

Sat 1/2411:53 amONT - SAT

1 stop27h 52mAlaska Airlines

Mon 1/266:46 pmSAT - ONT

1 stop27h 50mAlaska Airlines

Deal found 12/29

$344

Mon 2/21:05 pmONT - SAT

1 stop5h 41mFrontier

Fri 2/68:24 pmSAT - ONT

2 stops38h 59mFrontier

Deal found 12/27

$289

Last-minute flights from Ontario to San Antonio
Discover last-minute flight deals from Ontario to San Antonio. Data last updated December 29, 2025 and is based on user searches.

Wed 1/147:15 amONT - SAT

1 stop24h 15mFrontier

Thu 1/154:06 pmSAT - ONT

1 stop9h 53mFrontier

Deal found 12/28

$197

Thu 1/228:48 pmONT - SAT

1 stop13h 37mFrontier

Mon 1/269:41 pmSAT - ONT

2 stops19h 26mFrontier

Deal found 12/28

$164

Thu 1/226:20 amONT - SAT

1 stop11h 13mFrontier

Fri 1/238:24 pmSAT - ONT

1 stop5h 56mFrontier

Deal found 12/29

$200

Fri 1/2310:18 amONT - SAT

1 stop8h 46mFrontier

Sun 1/251:15 pmSAT - ONT

1 stop27h 26mFrontier

Deal found 12/29

$149

Fri 1/2310:18 amONT - SAT

1 stop8h 46mFrontier

Mon 1/269:41 pmSAT - ONT

2 stops19h 26mFrontier

Deal found 12/28

$179

Sun 1/258:27 pmONT - SAT

1 stop13h 58mFrontier

Sun 2/11:15 pmSAT - ONT

1 stop24h 55mFrontier

Deal found 12/27

$154

Thu 1/298:48 pmONT - SAT

1 stop13h 37mFrontier

Mon 2/21:20 pmSAT - ONT

1 stop7h 50mFrontier

Deal found 12/28

$131

Fri 1/306:20 amONT - SAT

1 stop11h 13mFrontier

Mon 2/21:20 pmSAT - ONT

1 stop7h 50mFrontier

Deal found 12/26

$203

One-way flights from Ontario to San Antonio
Search for one-way flight options from Ontario to San Antonio. Find affordable one-way fares based on user searches. Data last updated December 29, 2025.

Sat 2/216:00 amONT - SAT

1 stop11h 01mFrontier

Deal found 12/28

$61

Tue 2/108:36 amONT - SAT

1 stop5h 41mFrontier

Deal found 12/26

$64

Tue 2/248:35 amONT - SAT

1 stop6h 06mFrontier

Deal found 12/26

$65

Wed 1/213:07 pmONT - SAT

1 stop20h 04mFrontier

Deal found 12/26

$70

Fri 2/610:18 amONT - SAT

1 stop8h 46mFrontier

Deal found 12/28

$76

Fri 2/208:07 amONT - SAT

1 stop11h 46mFrontier

Deal found 12/26

$77

Sun 2/18:27 pmONT - SAT

1 stop13h 58mFrontier

Deal found 12/28

$78

Fri 1/2310:18 amONT - SAT

1 stop8h 46mFrontier

Deal found 12/29

$81

Mon 1/261:05 pmONT - SAT

1 stop5h 41mFrontier

Deal found 12/26

$91

Fri 1/3010:18 amONT - SAT

1 stop8h 46mFrontier

Deal found 12/26

$92

Find flight deals from Ontario to San Antonio

Most accurate provider	Mytrip 3 stars
Most trusted provider	Mytrip 3 stars
Round-trip from	$131 (Kiwi.com)
One-way from	$61 (Trip.com)
Popular in	March
Cheapest in	October
Average price	$343

Provider with most accurate pricing for Ontario-San Antonio flight deals.

Search Deals

Provider most trusted by Cheapflights users for Ontario-San Antonio flights.

Search Deals

From Ontario to San Antonio

Search Deals

One-way flight from Ontario to San Antonio

Search Deals

Highest demand for flights based on searches. 8% potential increase in price ($29 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

Price

OntarioSan Antonio

ONT - SAT

ONTSAT

Ontario

Fri 1/23

10:18 am-9:04 pm

1 stop8h 46m

San Antonio

Sun 1/25

1:15 pm-2:41 pm

1 stop27h 26m

$149

OntarioSan Antonio

ONT - SAT

ONTSAT

Ontario

Thu 1/29

6:20 am-7:33 pm

1 stop11h 13m

San Antonio

Sun 2/8

1:15 pm-7:32 pm

1 stop8h 17m

$200

OntarioSan Antonio

ONT - SAT

ONTSAT

Ontario

Sun 2/15

6:10 am-6:22 pm

1 stop10h 12m

San Antonio

Thu 2/19

8:25 pm-7:26 am

2 stops37h 01m

$223

OntarioSan Antonio

ONT - SAT

ONTSAT

Ontario

Sat 2/28

6:00 am-7:01 pm

1 stop11h 01m

San Antonio

Sat 3/7

11:35 am-9:03 pm

1 stop11h 28m

$250

OntarioSan Antonio

ONT - SAT

ONTSAT

Ontario

Thu 2/12

6:05 am-7:30 pm

1 stop11h 25m

San Antonio

Mon 2/16

9:39 pm-1:11 pm

1 stop17h 32m

$251

OntarioSan Antonio

ONT - SAT

ONTSAT

Ontario

Sat 1/17

12:41 pm-11:23 pm

1 stop8h 42m

San Antonio

Sun 1/18

7:35 am-12:16 pm

1 stop6h 41m

$281

OntarioSan Antonio

ONT - SAT

ONTSAT

Ontario

Mon 2/2

1:05 pm-8:46 pm

1 stop5h 41m

San Antonio

Fri 2/6

8:24 pm-9:23 am

2 stops38h 59m

$289

OntarioSan Antonio

ONT - SAT

ONTSAT

Ontario

Sat 1/31

11:53 am-5:45 pm

1 stop27h 52m

San Antonio

Wed 2/4

6:46 pm-11:56 pm

1 stop31h 10m

$325

OntarioSan Antonio

ONT - SAT

ONTSAT

Ontario

Sun 2/1

6:00 am-5:45 pm

1 stop9h 45m

San Antonio

Sat 2/7

6:46 pm-11:56 pm

1 stop31h 10m

$344

OntarioSan Antonio

ONT - SAT

ONTSAT

Ontario

Thu 1/22

4:03 pm-5:45 pm

1 stop23h 42m

San Antonio

Sat 1/24

6:46 pm-10:59 am

1 stop18h 13m

$344

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 21 results

Compare providers for flights from Ontario to San Antonio

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 December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
JustAirTicket	Price Accuracy-	Trust Score*1 star
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
Gotogate	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Cheapfaremart	Price Accuracy-	Trust Score*1 star

*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 Ontario-San Antonio flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on Ontario-San Antonio flight deals on Cheapflights vs. Mytrip >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 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 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.

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

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 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 $98). 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.

Reviews of airlines servicing San Antonio

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.

Southwest

8.0

Very good

4,252 reviews

Reviews

1 / 20

10.0

Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Southwest

8.0

Very good

4,252 reviews

Southwest

8.0

Very good

4,252 reviews

Reviews

1 / 20

10.0

Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

United Airlines

7.4

Good

9,120 reviews

Southwest

8.0

Very good

4,252 reviews

Reviews

1 / 20

10.0

Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

American Airlines

7.2

Good

11,072 reviews

Southwest

8.0

Very good

4,252 reviews

Reviews

1 / 20

10.0

Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Spirit Airlines

6.3

Okay

8,221 reviews

Southwest

8.0

Very good

4,252 reviews

Reviews

1 / 20

10.0

Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Frontier

5.7

Fair

3,063 reviews

Southwest

8.0

Very good

4,252 reviews

Reviews

1 / 20

10.0

Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

How long is the flight from Ontario to San Antonio?
For as low as $149, Frontier can have you in San Antonio from Ontario in 8h 46m. The distance between Ontario and San Antonio is about 1163 mi.
What are the cheapest airlines flying from Ontario to San Antonio round-trip?
According to our current data, Frontier ($110), Spirit Airlines ($118), and Delta ($200) offers the cheapest pricing from Ontario to San Antonio. Frontier is 66% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Ontario to San Antonio one-way?
The cheapest airlines for a one-way flight from Ontario to San Antonio are Frontier ($71), United Airlines ($109), and American Airlines ($128).
Can I find deals for flights from Ontario to San Antonio that include hotel bookings?
Yes. In addition to deals on Ontario to San Antonio flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to San Antonio?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to San Antonio.
Can I find deals for business class flights from Ontario to San Antonio?
Yes. Cheapflights offers flight deals from Ontario to San Antonio 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 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 $98). 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

New Braunfels

Kerrville

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Ontario to San Antonio

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$110	Average$217	FlexibilityNo cancel fee	On-time62%
Spirit Airlines	Cheapest$118	Average$170	FlexibilityNo cancel fee	On-time65%
Delta	Cheapest$200	Average$369	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$216	Average$383	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$256	Average$385	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$270	Average$406	FlexibilityNo cancel fee	On-time69%

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$61+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to San Antonio with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Ontario to San Antonio

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 December 29, 2025.

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 December 29, 2025.

Find flight deals from Ontario to San Antonio

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to San Antonio that are best for you.

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 December.

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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to San Antonio

How far ahead should I book a flight from Ontario to San Antonio?

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

What’s the top layover airport for flights from Ontario to San Antonio?

What’s the cheapest layover airport for flights from Ontario to San Antonio?

What’s the fastest layover option from Ontario to San Antonio?

Which airport typically offers the quickest layover for flights from Ontario to San Antonio?

Reviews of airlines servicing San Antonio

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.

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.

How long is the flight from Ontario to San Antonio?

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

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

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

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

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

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

Traveling to a place near San Antonio?

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Alternative routes for Ontario to San Antonio

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from Ontario to San Antonio

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Cheapest flights from Ontario to San Antonio
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 December 29, 2025.