ONT - SAT

$85 Find Cheap Flights from Ontario to San Antonio - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$173
Typical prices: $270-$426
Frontier
Sun 11/4Sat 11/10
ONT - SAT • 1 stop
Cheapest one-way
$85
Typical prices: $131-$292
Frontier
Sun 10/21
ONT - SAT • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Ontario and San Antonio. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
22 weeks
in advance
Our data shows that travelers who book at least 22 weeks in advance save around 41% compared to booking last minute.
Insights
Insights
When to travel
October
Cheapest • 35% price drop
June
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Las Vegas Harry Reid Intl (LAS)
Cheapest • Avg $292 (round-trip)
Phoenix Sky Harbor Intl (PHX)
Shortest trip • 4h 50m (one-way)
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Antonio!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to San Antonio (ONT-SAT)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to San Antonio

Sat, Nov 14 - Tue, Nov 17
Frontier Logo
6:25 am - 7:25 pmONT  Ontario-SAT San Antonio
11h 00m1 stop Denver Intl
Frontier Logo
8:20 pm - 10:35 amSAT  San Antonio-ONT Ontario
16h 15m1 stop Denver Intl
$175Frontier
Wed, Oct 21 - Wed, Oct 28
Frontier Logo
6:15 am - 7:26 pmONT  Ontario-SAT San Antonio
11h 11m1 stop Denver Intl
Frontier Logo
8:20 pm - 11:51 pmSAT  San Antonio-ONT Ontario
5h 31m1 stop Denver Intl
$175Frontier
Wed, Oct 21 - Wed, Oct 28
American Airlines Logo
1:05 pm - 10:59 pmONT  Ontario-SAT San Antonio
7h 54m1 stop Phoenix Sky Harbor Intl
American Airlines Logo
8:17 am - 3:16 pmSAT  San Antonio-ONT Ontario
8h 59m1 stop Phoenix Sky Harbor Intl
$353American Airlines
Sat, Oct 24 - Sat, Oct 31
United Airlines Logo
1:22 pm - 10:51 pmONT  Ontario-SAT San Antonio
7h 29m2 stops Denver Intl Houston George Bush Intcntl
United Airlines Logo
5:30 am - 12:33 pmSAT  San Antonio-ONT Ontario
9h 03m2 stops Houston George Bush Intcntl Denver Intl
$366United Airlines
Wed, Oct 21 - Wed, Oct 28
United Airlines Logo
1:24 pm - 10:51 pmONT  Ontario-SAT San Antonio
7h 27m2 stops Denver Intl Houston George Bush Intcntl
United Airlines Logo
5:30 am - 12:33 pmSAT  San Antonio-ONT Ontario
9h 03m2 stops Houston George Bush Intcntl Denver Intl
$366United Airlines
Sat, Feb 13 - Sat, Feb 20
Southwest Logo
10:05 am - 6:20 pmONT  Ontario-SAT San Antonio
6h 15m2 stops Phoenix Sky Harbor Intl Dallas Love Field
Southwest Logo
12:40 pm - 6:35 pmSAT  San Antonio-ONT Ontario
7h 55m2 stops Denver Intl Las Vegas Harry Reid Intl
$383Southwest
Wed, Nov 18 - Wed, Dec 2
Southwest Logo
10:25 am - 9:30 pmONT  Ontario-SAT San Antonio
9h 05m2 stops Oakland Phoenix Sky Harbor Intl
Southwest Logo
3:00 pm - 7:50 pmSAT  San Antonio-ONT Ontario
6h 50m2 stops Dallas Love Field Phoenix Sky Harbor Intl
$383Southwest
Tue, Nov 17 - Sat, Nov 21
American Airlines Logo
9:50 am - 7:22 pmONT  Ontario-SAT San Antonio
7h 32m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth
American Airlines Logo
7:06 pm - 11:59 pmSAT  San Antonio-ONT Ontario
6h 53m1 stop Dallas/Fort Worth
$387American Airlines
Wed, Jan 20 - Sun, Jan 24
Delta Logo
5:05 pm - 12:45 amONT  Ontario-SAT San Antonio
5h 40m1 stop Salt Lake City
Delta Logo
6:05 pm - 11:48 pmSAT  San Antonio-ONT Ontario
7h 43m1 stop Salt Lake City
$406Delta
Thu, Oct 15 - Mon, Oct 19
Delta Logo
5:03 pm - 12:30 amONT  Ontario-SAT San Antonio
5h 27m1 stop Salt Lake City
Delta Logo
6:35 am - 12:36 pmSAT  San Antonio-ONT Ontario
8h 01m1 stop Salt Lake City
$456Delta
Booking Insights

Price, demand and travel trends for Ontario to San Antonio flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Ontario to San Antonio?

Round-trip flights from Ontario to San Antonio typically range from $270 to $426. The lowest price found in the past 5 days was $173, on Frontier.

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

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Ontario to San Antonio. It’s 12% cheaper than the average day, while Sunday is the most expensive, with prices 9% higher.

What’s the cheapest month to fly from Ontario to San Antonio?

•October is the cheapest month to fly from Ontario to San Antonio at $228 round-trip.
•June ($406) and March ($400) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 78% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Ontario to San Antonio the cheapest?

Flights from Ontario to San Antonio are cheapest 22 weeks before departure. Booking in this window typically costs about 41% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals

Key details for Ontario to San Antonio flights

Low season

September

Cheapest flight

$85
Beat the crowds with an average 21% drop in travelers.
One-way 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

Your Ontario to San Antonio flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Ontario to San Antonio?

    Two cabin classes are available on flights from Ontario to San Antonio:

    • Economy Class
    • First Class

  • How long is a flight from Ontario to San Antonio?

    A nonstop flight from Ontario to San Antonio takes 00m, covering 1,163 miles.

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

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a Ontario to San Antonio flight?

    Round-trip flights from Ontario to San Antonio range from $270 to $426, with an average of $349 over the past 12 months. Anything below $270 counts as a good deal.

  • How expensive are last-minute Ontario to San Antonio flights?

    Last-minute fares on this route (booked within two weeks of departure) run 24% above the $349 route average. Book 22 weeks before departure for the lowest fares.

  • Have flight prices from Ontario to San Antonio changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $175 to $1,401. That means the highest observed fare was about 8x higher than the lowest one.

  • How are flight prices from Ontario to San Antonio looking right now?

    One-way fares from Ontario to San Antonio are currently lower than usual. Average one-way flight prices are about $182, which is 13% below the typical average for this route.

  • What car rental options are available at San Antonio Airport (SAT)?

    San Antonio Airport (SAT) hosts 5 major car rental companies, with daily rates starting from around $22 for economy cars. Top options include:

    • Europcar
    • Fox
    • Dollar
    • Hertz
    • Alamo

  • Which airports can I use when flying from Ontario to San Antonio?

    Flights from Ontario to San Antonio usually depart from Ontario (ONT) and arrive at San Antonio (SAT).

  • Which airports do connecting flights from Ontario to San Antonio pass through?

    One-stop flights from Ontario to San Antonio most commonly connect through:

    • Phoenix Sky Harbor Intl (PHX) - 38% of one-stop connections
    • Denver Intl (DEN) - 32% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) - 18% of one-stop connections
    • Dallas/Fort Worth (DFW) - 7% of one-stop connections

  • Can I save money by using flexible dates for flights from Ontario to San Antonio?

    Yes. Flexible dates can save you up to 20% on flights from Ontario to San Antonio. Wednesday is the cheapest departure day at $310 round-trip on average, while Sunday is the most expensive at $383, a difference of $73.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Ontario to San Antonio?

    Flying via Phoenix Sky Harbor Intl (PHX) gives the shortest average 1-stop total travel time at 4h 50m, compared with 5h 26m via Dallas Love Field (DAL) and 5h 32m via Houston George Bush Intcntl (IAH).

  • What is the time difference between Ontario and San Antonio?

    San Antonio is 2 hours ahead of Ontario (Central Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in San Antonio?

    Some of the most popular sights in San Antonio are San Antonio River Walk, SeaWorld San Antonio and Alamodome. These are among the most viewed places in San Antonio on KAYAK.

  • Which airlines include bags at no extra cost on Ontario to San Antonio flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • JetBlue: a cabin bag in Economy Class class

    Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

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

    On Frontier Airlines, each checked bag can weigh up to 40 lbs and measure up to 62 in total, calculated by adding the bag's length, width and depth. Bags weighing more than 51 lbs may incur additional fees.

  • Where can children play at ONT before a flight?

    The Ontario-USO lounge has a children's area and a nursery for troops and their families.

Your guide to booking Ontario to San Antonio flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Sunday. On this route, Wednesday flights average $310, about $73 less than Sunday fares (19% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 22 weeks before you fly. On this route, that window historically saves about 41% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Ontario to San Antonio trip for October. Fares historically average $228 round-trip in that month - typically $178 less than the most expensive month, which is June (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to San Antonio Airport.

    • Wyndham Garden San Antonio Airport
    • La Quinta Inn & Suites by Wyndham San Antonio Airport
    • Heritage Inn & Suites San Antonio Airport, Trademark Wyndham
  • Use SAT as a base for exploring the Lone Star State. It's about 10 minutes from downtown San Antonio and it also gives you access to Austin, known for music and technology and Corpus Christi on the coast.
  • The most convenient way to get to Ontario International Airport (ONT) is by combining public transportation and airport shuttle services. You could take Metrolink’s San Bernardino Line to Rancho Cucamonga Station and then catch the ONT Connect shuttle to Terminals 2 and 4 for a hassle-free and cost-effective journey, avoiding traffic and parking issues.

More options for your flight from Ontario to San Antonio

Complete your trip to San Antonio with a hotel stay or car rental

Car rentals in San Antonio
Hotels in San Antonio
Vacations in San Antonio