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Find cheap flights from Ontario to San Antonio from $69

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to San Antonio departing on 5/17. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 5/25
Sat 6/1

Search hundreds of travel sites at once for deals on flights to San Antonio

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to San Antonio, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to San Antonio, as well as popular online travel agencies
In the last 7 days travelers have searched 44,979,812 times on KAYAK, and here is why:

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Cheap flight deals from Ontario to San Antonio (ONT-SAT)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to San Antonio that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
12:59 am - 11:22 amONT-SAT
8h 23m1 stop
6:48 pm - 4:02 pmSAT-ONT
23h 14m1 stop
$94Frontier
Find Deal
Tue, May 7 - Wed, May 22
8:01 pm - 10:56 amONT-SAT
12h 55m1 stop
9:54 pm - 9:39 amSAT-ONT
13h 45m1 stop
$97Frontier
Find Deal
Sat, May 11 - Wed, May 15
12:50 pm - 11:11 pmONT-SAT
8h 21m1 stop
6:16 pm - 11:43 pmSAT-ONT
7h 27m1 stop
$276Delta
Find Deal
Sat, May 18 - Tue, May 21
1:20 pm - 9:11 pmONT-SAT
5h 51m1 stop
7:20 am - 12:13 pmSAT-ONT
6h 53m1 stop
$297Delta
Find Deal
Sat, May 18 - Mon, May 20
12:53 pm - 8:12 pmONT-SAT
5h 19m1 stop
6:00 am - 8:45 amSAT-ONT
4h 45m1 stop
$306American Airlines
Find Deal
Wed, May 15 - Sun, May 19
12:53 pm - 9:51 pmONT-SAT
6h 58m2 stops
6:00 am - 11:47 amSAT-ONT
7h 47m1 stop
$321American Airlines
Find Deal
Sat, May 25 - Tue, May 28
1:36 pm - 11:44 pmONT-SAT
8h 08m1 stop
6:00 am - 12:45 pmSAT-ONT
8h 45m1 stop
$356United Airlines
Find Deal
Wed, May 22 - Wed, May 29
1:50 pm - 12:30 amONT-SAT
8h 40m1 stop
6:00 am - 12:45 pmSAT-ONT
8h 45m1 stop
$357United Airlines
Find Deal
Tue, May 28 - Thu, May 30
12:59 am - 8:23 amONT-SAT
5h 24m1 stop
6:01 pm - 11:58 pmSAT-ONT
7h 57m1 stop
Fri, May 17 - Tue, May 21
12:59 am - 8:23 amONT-SAT
5h 24m1 stop
6:07 pm - 11:59 pmSAT-ONT
7h 52m1 stop
Thu, Jun 13 - Tue, Jun 18

Flights from Ontario to San Antonio - Travel Insights & Trends

Get data-powered insights and trends into flights from Ontario to San Antonio to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ontario to San Antonio?

The average price of all flights from Ontario to San Antonio clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to San Antonio on a Wednesday and more expensive on a Sunday. On your return trip to Ontario, you should consider flying back on a Tuesday, and avoid Saturdays for better deals.

What is the cheapest month to fly from Ontario to San Antonio?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Ontario to San Antonio, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Ontario to San Antonio is August, where tickets cost $195 on average. On the other hand, the most expensive months are December and March, where the average cost of tickets is $363 and $356 respectively.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Ontario to San Antonio, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Ontario to San Antonio, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 72 days before departure.

Which airlines provide the cheapest flights from Ontario to San Antonio?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, Frontier offered the best one-way deal for that route, at $69. KAYAK users also found Ontario to San Antonio round-trip flights on Frontier from $94 and on Delta from $276.

Good to know

Low season

February

High season

October

Cheapest flight

$69
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 16% lower on average.
Flight from Ontario to San Antonio

When to book flights from Ontario to San Antonio

Are your dates flexible? Find out the best times to travel from Ontario to San Antonio based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to San Antonio

  • Can I fly with my dog from Ontario to San Antonio?

    You can book your ticket with American Airlines or Delta Air Lines to travel with your dog from Ontario to San Antonio. These airlines permit dogs and cats to travel in the cabin or as checked baggage, depending on their size and weight. However, different fees and requirements apply.

  • What is the permitted weight and size limit for checked luggage on Frontier Airlines?

    The weight limit for checked bags on Frontier Airlines is approximately 50 lbs per bag. The maximum dimensions for checked bags are typically about 60 in, which is calculated by adding the bag's length, width, and height. Passengers must be mindful that bags weighing more than 51 lbs may incur additional fees for exceeding the weight limit.

  • What if my child wants to play at Ontario International Airport (ONT) before our flight?

    The airport has a Kids' play area, so If you're traveling with your child to San Antonio, you can head to the designated play area where your child can burn off some energy before the flight. The kid's play area usually has interactive games, climbing structures, and other fun activities that your child can enjoy doing.

  • Which airlines offer special services to individuals with disabilities from Ontario to San Antonio?

    Delta Air Lines offers excellent services for passengers with disabilities. They cater to individuals who need assistive devices like walkers, crutches, or canes, allowing them to bring these items on board and providing storage space during the flight. Passengers with disabilities can also benefit from specialized seating options, such as seats with movable armrests, extra legroom, and proximity to lavatories.

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

    In the last 3 days, the lowest price for a flight from Ontario to San Antonio was $69 for a one-way ticket and $94 for a round-trip.

  • Do I need a passport to fly between Ontario and San Antonio?

    A passport is not required to fly from Ontario to San Antonio.

  • Which aircraft models fly most regularly from Ontario to San Antonio?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to San Antonio?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Ontario and San Antonio, with oneworld being the most commonly used for this route.

  • What is the most popular layover when flying to San Antonio from Ontario?

    Phoenix is the most popular layover city among KAYAK users traveling from Ontario to San Antonio.

  • Which is the best airline for flights from Ontario to San Antonio, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to San Antonio are Delta and United Airlines. With an average price for the route of $387 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $493 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Ontario to San Antonio?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to San Antonio.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to San Antonio?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Antonio from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to San Antonio?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Antonio with an airline and back to Ontario with another airline. Booking your flights between Ontario and SAT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to San Antonio?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Antonio from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from ONT to San Antonio

  • Common layovers for flights from Ontario to San Antonio occur at George Bush Intercontinental Airport (IAH) and Fort Worth International Airport (DFW). These airports are major transportation hubs offering multiple connecting flights to San Antonio. Layovers from Ontario to San Antonio vary depending on the airline and flight schedule.
  • The most convenient way to get to Ontario International Airport (ONT) is by combining public transportation and airport shuttle services. You could take a train or bus to a nearby transit center like Ontario East or Rancho Cucamonga and then catch the airport shuttle for a hassle-free and cost-effective journey, avoiding traffic and parking issues.
  • When traveling from Ontario to San Antonio, it's worth noting that Alaska Airlines provides various classes of service on many of its aircraft, including first class and premium class - ensuring a comfortable and enjoyable journey. First Class, for instance, offers passengers exclusive benefits such as priority boarding and spacious seats with extra legroom.
  • American Airlines and United Airlines greatly support unaccompanied minors flying from Ontario to San Antonio. These airlines offer the Unaccompanied Minor service for children aged 5 to 14. Trained staff members assist the children during check-in, accompany them during the flight, and supervise their arrival at the destination.
  • You need to know that San Antonio International Airport (SAT) is conveniently located near vibrant cities in Texas, including downtown San Antonio, Austin, the state capital known for music and technology, and Corpus Christi, a coastal gem. SAT serves as a gateway to diverse destinations in the Lone Star State.
See more tips

Top 5 airlines serving from Ontario to San Antonio

 
See real verified KAYAK customer reviews for airlines flying from Ontario to San Antonio. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to San Antonio? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10975 reviews
8.0entertainment
7.4food
8.2boarding
7.9comfort
8.6crew
Airline reviews

Our flight was delayed in Atlanta. The staff could have gave us an explanation for the delay and how long it would be.

8.0 ExcellentAnonymous, Apr 2024ATL - SAT
Read more about Delta reviews

Our flight was delayed in Atlanta. The staff could have gave us an explanation for the delay and how long it would be.

There was a loud squeaky sound the whole time we were flying.

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Food service was bare-bone. Better bot to have any at all rather than hand out premade coffees and cookies to random few passengers.

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great!! I haven’t had a bad experience with them.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Due to one crew member not showing up to work, our flight was significantly delayed causing us to miss our connecting flight in Houston to Mississippi causing us to be delayed by more than 6 hours and missing our event all together. Very disappointing. All because ONE crew member called in sick. United did grant us a $15 meal voucher, which was a small but appreciated concession that I wasn’t able to use because I ordered my lunch and paid for it before applying the concession, and the staff said it was too late to use it. Ugh! We also had a TWO delay coming back from Mississippi, but that was on American Airlines and it was due to weather, so not their fault. Anyway, not at all impressed with United’s handling of our flight and the HUGE disappointment of missing our important family event for our 90 year old mother. All that money and all that stress and emotions for nothing. Having to wait the hour to bring an employee from LAX seemed like something that should not have happened. Why don’t you have a local back-up? Santa Ana is not a little airport in a rural area.

Trip was smooth bumpy from the wind but no issues at all the crew attendant was very pleasant and had great customer service

The customer service was excellent! Check-in, baggage check-in, boarding, the flight went very smooth.

Awful. I got stuck next to a person carrying a dog and behind someone with a dog. People need to board these dogs downstairs. The cabin is crowded enough with your pets

It was delayed several hours which delayed our connection in Denver. Not happy.

Ok, but comfort was lacking as the seats were way to small

All good except paid for wifi that did not work

Some of these FA’s need attitude check. Snarky bitches

The plane boarded and deplaned twice before the crew timed out. Flight was 7 hours late departing. Horrible experience!

Got automatically assigned middle seats unless you fork out extra money for a seat assignment, not impressed.

Flight boarded without pilots. Sat on plane for 3 hrs. after over an hour late boarding. Plane never took off. Had to deplane near midnight. Line for rebooking was 3 hours + long. I had to leave.

Missed the flight because of them and up geting a rental car

Delayd flight out of atl as always miss my conection in dfw no flight untill next day

The staff was unprofessional and didn’t communicate very well. The boarding process was very disheveled, potentially due to a power outage the previous day but there was no contingency plan to properly get passengers boarded the following day. Once boarded the aircraft stayed on the tarmac for over 45 minutes due to high winds. The communication was sporadic but an announcement was finally made an additional 30 minutes later that the flight was cancelled but we couldn’t get off the plane. Prior to deplaning one of the gate agents came on the plane and made an announcement for everyone to pickup their checked bags and take a card to rebook a new reservation because they didn’t have adequate staff. Flights were missed, passengers went to different airports and there was little to no assistance from AA.

Apart from the delay due to unforeseen circumstances. The leg from sjc to dfw was fine. It was the leg from dfw to orf that we encountered issues mainly due to the flight attendant crew not being friendly. We had two small children and we needed some assistance to warm up milk so the baby would sleep. The crew just didn’t get it and made things very difficult. One made a remark that the baby’s dirty diaper smell was a “gift” to the plane in a rude way. Normally I’d brush that off as a funny comment if the rest of the trip the attendants were helpful or understanding of the difficulty we faced. But that wasn’t the case. We were met with rudeness on the second leg. Whereas on the first leg the crew were so nice and helpful.

Flight was delayed and missed connecting flight. Did not give warning about delay until we showed up at the airport. Not good.

It was wonderful upgrading to first. Plane was so cold thou. Crew was great. Wish there was a food option in first for such a long flight. Doesnt matter the time of day. Chintzy.

Not sure about entertainment as I didn't use any, soay e there should be an NA option on this survey. Otherwise everything was just as it should be. Of course I wish planes were more comfortable and had seats that would tilt back further.

1st flight was delayed because of broken radio, missed connection but they got us on very next plane 1 hr later. Return flights were both delayed by 1 hr each. Crews were fine. Planes ok, but had to check carry ons.

I love to be able to connect my own devices to the entertainment system. It works great!

Seats suck, not enough room, overcrowded planes, hectic situation all together.

On time and fast. Overall it was a pleasant experience.

3 hour delay was brutal though not Spirit Airlines fault. the control tower would not let us take off because of weather

Beware of all the extras. Nickel and dimed. Everything was extra. It turns a $90 fare in to a $400 fair quite easily.

It would have been nice to have been on the flight

Delayed several times. Flight was to arrive at midnight and it arrive at 3 am. A 3 hour delay is already bad but one that has you arriving in the wee hour is just disruptive and overall unacceptable. The complete lack of restitution is a joke in keeping with Spirit’s reputation of ranking bottom-low in the pecking order.

It wasn’t as horrible as I would have expected, however, to not provide water and change so much for bags is a ripoff to say the least.

Cancelled my flight , currently stuck in Houston and will likely miss my cruise

The flight attendants were very personable, extremely friendly, and had a very good feeling of the energy around them not to mention they’re very funny and engaging. What made up for the discomfort of the seats and the fact that the plane sat for a long time on the Turmac. Not sure if the pilot was new, but the landing was very rough sort of like I was at a magic mountain theme park ride that was built in 1959

Unfortunately not great, my flight was canceled with no notice given. I attempted to reach out to spirit airlines and have yet to receive any correspondence. I then had to book a new flight at two times the cost of the original.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

Terrible. Seats are bad and the baggage policy is inconsistent

Better than I expected but I did pay for a seat and carry on bags ahead of time.

I hope to avoid flying with them in the future. First flight got cancelled then got stuck with a 13 hour layover in Denver. The process was long and frustrating to many people.

Flight was delayed on the runway for 40 minutes the crew did not even offer even water to passengers to compensate for the flight delayed. The flight was delayed due to aircraft mechanical issues. Worst customer service ever

Everything was good, 20/30 minutes late waiting on a crew member. It’s hard to keep employees. Or serious employees I know. I remember one flight from Houston of Frontiers was almost 18 hours late. And another 4 hours late very poor. But I would rather be late and safe than the on the news. Thank you.

The flight was delayed and I had to cancel because I would have missed my connection and there were no other flights for the next two days. They also lost my bag!!

Book cheap flights from Ontario to San Antonio

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Ontario to San Antonio found on KAYAK in the last 72 hours.
5/17Fri
1 stopFrontier
16h 44mONT-SAT
$69
5/17Fri
1 stopFrontier
5h 24mONT-SAT
$75
5/18Sat
1 stopDelta
7h 10mONT-SAT
$138
7/31Wed
1 stopAmerican Airlines
7h 19mONT-SAT
$139
5/23Thu
1 stopAmerican Airlines
7h 03mONT-SAT
$168
5/18Sat
1 stopUnited Airlines
5h 58mONT-SAT
$178
7/10Wed
1 stopUnited Airlines
8h 14mONT-SAT
$179
8/19Mon
2 stopsAlaska Airlines
20h 30mONT-SAT
$288
5/28Tue
2 stopsAlaska Airlines
14h 58mONT-SAT
$292
5/6Mon
1 stopDelta
9h 42mONT-SAT
$519

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Last minute flights from Ontario to San Antonio

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Ontario to San Antonio that are departing in the next 10 days.
4/30Tue
multi-stopFrontier
20h 15mONT-SAT
5/8Wed
multi-stopFrontier
16h 38mSAT-ONT
$176
4/30Tue
multi-stopFrontier
8h 23mONT-SAT
5/3Fri
multi-stopFrontier
27h 00mSAT-ONT
$181
4/28Sun
multi-stopFrontier
7h 48mONT-SAT
5/6Mon
multi-stopFrontier
11h 27mSAT-ONT
$217
4/30Tue
multi-stopFrontier
24h 09mONT-SAT
5/5Sun
multi-stopFrontier
21h 07mSAT-ONT
$226
4/30Tue
multi-stopFrontier
26h 06mONT-SAT
5/1Wed
multi-stopFrontier
11h 14mSAT-ONT
$250
4/30Tue
multi-stop
8h 23mONT-SAT
5/28Tue
multi-stop
10h 26mSAT-ONT
$590
4/30Tue
multi-stopUnited Airlines
5h 58mONT-SAT
5/1Wed
multi-stopUnited Airlines
9h 10mSAT-ONT
$640
4/29Mon
multi-stopUnited Airlines
8h 01mONT-SAT
5/6Mon
multi-stopUnited Airlines
27h 28mSAT-ONT
$645
4/30Tue
multi-stopAmerican Airlines
4h 49mONT-SAT
5/2Thu
multi-stopAmerican Airlines
4h 54mSAT-ONT
$696
4/30Tue
multi-stopAmerican Airlines
7h 18mONT-SAT
5/8Wed
multi-stopAmerican Airlines
4h 45mSAT-ONT
$761

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Ontario - San Antonio Flights

Departure:

Ontario (ONT)United States

Destination:

San Antonio (SAT)United States

Return flight deals:

San Antonio - Ontario

Cabin classes: