ONT - SAT

$82 Find Cheap Flights from Ontario to San Antonio

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 10/24. 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
1 adult, Economy

KAYAK searches 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
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Cheap Flights 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to San Antonio

Tue, Aug 5 - Tue, Aug 12
Frontier Logo
7:00 am - 2:21 pmONT-SAT
5h 21m1 stop
Frontier Logo
3:06 pm - 9:52 pmSAT-ONT
8h 46m1 stop
$128Frontier
Find Deal
Sat, Sep 6 - Sat, Sep 20
Frontier Logo
8:00 am - 3:50 pmONT-SAT
5h 50m1 stop
Frontier Logo
3:22 pm - 7:54 pmSAT-ONT
6h 32m1 stop
$130Frontier
Find Deal
Tue, Aug 5 - Tue, Aug 12
Frontier Logo
7:00 am - 2:21 pmONT-SAT
5h 21m1 stop
Frontier Logo
3:06 pm - 9:52 pmSAT-ONT
8h 46m1 stop
$145Frontier
Find Deal
Thu, Oct 9 - Sat, Oct 11
Frontier Logo
6:00 am - 4:58 pmONT-SAT
8h 58m1 stop
Frontier Logo
4:12 pm - 11:50 pmSAT-ONT
9h 38m1 stop
$151Frontier
Find Deal
Sun, Jul 20 - Sat, Jul 26
Frontier Logo
6:00 am - 1:06 pmONT-SAT
5h 06m1 stop
Frontier Logo
6:59 pm - 11:50 pmSAT-ONT
6h 51m1 stop
$154Frontier
Find Deal
Thu, Sep 25 - Mon, Sep 29
Frontier Logo
9:15 am - 8:48 pmONT-SAT
9h 33m1 stop
Frontier Logo
2:07 pm - 8:56 pmSAT-ONT
8h 49m1 stop
$161Frontier
Find Deal
Fri, Sep 12 - Sun, Sep 14
Frontier Logo
6:00 am - 1:22 pmONT-SAT
5h 22m1 stop
Frontier Logo
2:08 pm - 9:13 pmSAT-ONT
9h 05m1 stop
$162Frontier
Find Deal
Wed, Aug 6 - Sat, Aug 9
Frontier Logo
7:22 pm - 1:06 pmONT-SAT
15h 44m1 stop
Frontier Logo
3:06 pm - 9:52 pmSAT-ONT
8h 46m1 stop
$171Frontier
Find Deal
Wed, Sep 17 - Wed, Sep 24
American Airlines Logo
12:45 pm - 8:51 pmONT-SAT
6h 06m1 stop
American Airlines Logo
12:44 pm - 10:33 pmSAT-ONT
11h 49m1 stop
$282American Airlines
Find Deal
Wed, Sep 17 - Wed, Sep 24
American Airlines Logo
1:10 pm - 11:00 pmONT-SAT
7h 50m2 stops
American Airlines Logo
12:44 pm - 10:33 pmSAT-ONT
11h 49m1 stop
$287American Airlines
Find Deal
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KAYAK's insights & trends for Ontario to San Antonio flights

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 round-trip 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 Friday, and avoid Thursdays 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 round-trip 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 January, where tickets cost $299 (return) on average. On the other hand, the most expensive months are March and December, where the average cost of round-trip tickets is $389 and $386 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip 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 week.

To get a below average price on the flight from Ontario to San Antonio, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonJanuary
High seasonNovember
Cheapest flight$82
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 1% increase in price.
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 $82 for a one-way ticket and $128 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, Star Alliance, and oneworld are the airline alliances operating flights between Ontario and San Antonio, with SkyTeam 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 $352 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 $394 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.

KAYAK’s top tips for finding a cheap flight from Ontario 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.

Reviews of the 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
SouthwestOverall score based on 4266 reviews
8.0Comfort
7.0Food
8.6Crew
8.2Boarding
7.6Entertainment
Airline reviews

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

4.0 OkayTraci, Jun 2025OAK - SEA
Read more Southwest reviews

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

No trays in our seats, we sat in first row, purchased a business class fare. Had to hold our drinks and snack in our hands. No plugs for our cell phones. Had to pay for it a drink cocktail each. Seats so uncomfortable.

Flight wasn’t even full, but too many carry-ons caused us to run out of bin space. New bag fee has folks who would usually check their bags carrying on. Watching Southwest morph into Spirit/Frontier is so sad to watch

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

It was a perfect flight in all aspects! Both legs!

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Multiple delays and gate changes. Arrived at final destination 6 hours late. All rental cars had been taken.

The movies using Southwest WiFi kept pausing and I had to restart multiple times.

First, my flight was a usual flight nothing exceptional or unexpected. Over all it was a normal, good flight! Second, your questionaire is wholly lacking in the proper options to which one can answer a question. Often on short flights, there is no food let alone entertainment so why isn't that reflected in your questionaire? A simple "not applicable" would cover that issue appropriately but no, your form arbitrarily enters an answer based on the initial assessment which normally isn't factual. Until you provide an accurate means of assessing flights, I'll no longer be completing of these unimpressive and misleading assessements. Thank you!

Gate agent did not hold flight for connection, provided no assistance to get new flight

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

Oh my gosh, I loved my experience with United! they made me want to travel more often.

The planes are so dirty! Food crumbs and finger print smudges, Dust over the vents and carpet stains. It’s disgusting.

The bag drop personal were not helpful. There was no food on the flight. Boeing aircraft, lousy as always. Everything else was fine.

Asked several times dairy free options and was ignored. Was told chips was the only thing I could have that I should have put it on my profile “which it is”. Very unprofessional. WiFi didn’t work have the flight. Overall a very bad experience.

Plane still had screens for watching movies. Good selection too.

Flight crew was amazing! I don't like that the Polaris seats are side-by-side.

The flight delay in Dallas created a domino effect that impacted all connecting flights, leading to an increase in the number of connections. As a result, I missed my flight from Casablanca to Marrakech due to the tight turnaround when landing in Casablanca. CMN Airport was understaffed; only one employee was available to assist passengers while others just stood by and watched. It was an extremely frustrating situation. Many passengers were crying and banging their hands on the counter while talking to customer service representative Allabough. Unfortunately, Allabough couldn’t change my flight in the system. At the same time, I was on the phone with an American Airlines customer service representative named Solomon, who said he couldn’t make the change either. So, I decided to take an ONYA Voyages train from Casablanca to Marrakech to reach my destination on Friday, June 26. It turned out to be an unpredictable trip.

Pretty bad gate mgmt upon arrival. No open gates and we had to wait at midnight. Shouldn’t be a surprise that an aircraft is coming in.

Comfortable plane ride however on delays disappointment no real details as to why the delays when other flights are leaving the airport

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

I’m impressed that we were on time in Sacramento after having a late departure in Newark and our made it. The staff was friendly and warm.

5.5 hour delay with no explanation on why, along with no proactive effort to reaccomodate me.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious.

Plane, flight, crew, captain were all great. The first flight had a Chipotle box lunch...delicious. this return flight not as tasty, but filling.

So awful Unreliable Unfriendly Bad Mad Mean Smelly Hot Late Overbooked Understaffed Expensive Cramped Narcs If they were a fruit they’d be rotten durian

It’s a great flight. Service is good. Staff is awesome.

I wanted to upgrade my seat because I’m 6’2 and never have enough leg room for my comfort. They upgraded my seat for free putting me in an emergency exit seat. I was very comfortable

We had an almost 7 hour flight delay. We left the gate twice and taxi-ed and then returned the gate twice. Finally we got a new flight crew (our third one) and then left the gate to the final time before departing at 6:45pm (original flight time was 12pm). Out of Newark.

First off, i received an e-mail to allow me to check in for our flight. I folllowed the link, when it came to the seat selection, I was unable to select any "free" seats ( meaning without any additional charge) because everything was " unavailable". My Husband and I were ttavelling with our 3 children hence, i wanted to be assured that we were all seated next to each other. I tried 3 times and everytime I click the selection it said " error loading". What the system wants is for me to buy the seats ( anywhere from $25 to $50 dollars each passenger) like I did on our flight bound to L.A. I called customer service and the guy was unhelpful all he kept repeating was to come really early at the airport and we will be assigned seats there. Imagine my anxiety!!! Spirit says they are a budget airline but they are actually the opposite!! And just before our flight, the flight attendant KEPT announcing/ selling the seats that were not purchased for a cheaper price!! Like it was a bidding/ bargaining game! This was our first and last time to fly Spirit.

My flight got cancelled by Spirit airlines, it was bad experience to me

Spirit gets you there; it's no worse than any other aircraft, all things considered. (It's not like everyone else is such a hero). But - holy moses - do they nickel and dime you to absolutely every nickel - I was really expecting to have to pay to use the bathroom. And when the captain comes on with a 5 minute sales pitch about getting "points", that was like something on Bizarro world. Other than that, everyone else was professional and worked hard to get us from point A to point B. I'm not loving all the "self-service" stuff but there it is - just when the machines don't work you don't have anyone to talk to.

Easy boarding and good flight. Need to work on the beverage and snack situation

The staff was great, but because the 2nd lieutenant didn’t show up for the flight we all had to deboard and wait 2 1/2 hours for one to show up. Very disappointing the crew can’t get schedules confirmed which wouldn’t have caused this issue.

Flight was delayed a bit, but that was expected (and updated), so really not bad at all for the price. Could’ve used one less email asking me to upgrade my seat; otherwise no significant complaints

Easy boarding. Met expectations for a 2-3 hour flight. Early arrival at DFW caused a 39 minute delay on the tarmac in getting to our gate. 😏 overall, good flight.

My experience with Spirit went pretty much as expected. It's a no frills airline, and you get what you pay for. I don't require much, so I was grateful to have an inexpensive way to travel. It is sad to me that the gate agents and flight crew don't smile much or seem very friendly or helpful. They are competent and efficient, and that's really all I need.

The confirmation # CK8GNW and my name was not recognized/in Frontier system. I was able to check in on Frintier app so i went to the Frontier ticket agent, at time they told me that my name/ confirmation did not show up as a purchased ticket. I had to purchase a new ticket that cost $289.00 one way.

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

Worst airline experience. They were rude and kept changing our seats and/or giving our seats away so our family didn’t get to sit with each other. Almost everyone we dealt with at both airports with this airline was rude. The app kept giving us wrong information making things take longer. Dealing with them before TSA can take close to an hour…longer than I’ve ever had to deal with before. Never using this airline again.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

It was a short flight so no food or entertainment….

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

Flight was delayed 3 times, would have been nice to have received text message instead of email notifications. Frontier app wasn’t even updated accordingly, no gate number disclosed. No agent at front desk of gate to inform of delay. Very confused and left if the dark

They changed the timing , first delayed by 4 hours then went back to 40 mins late, we had to run back to airport to not miss our flight. This is ridiculous

Early arrival. Great landing. Pilot updates. Too cold in plane.

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