Cheap flights from Ontario to San Antonio from $105
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to San Antonio departing on 8/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Frontier flights from Ontario to San Antonio
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How to get the cheapest flight ticket from Ontario to San Antonio
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to San Antonio?
If you aren’t able to travel during the month of August, then book flights to San Antonio from Ontario during January instead. Flights to San Antonio in January, while not as cheap as those in August, still average around $299.
What is the cheapest day to depart on your flight to San Antonio?
The cheapest day to depart on your flight to San Antonio is on a Wednesday when prices can be found for as low as $238. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Sunday is $322.
What is the cheapest time of day to depart on your flight to San Antonio?
According to our data, the cheapest time of day to fly to San Antonio is in the evening. momondo users have found flights departing from Ontario to San Antonio in the evening for as low as $186. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the morning, with an average ticket price of $288. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
How far in advance should I book a flight to San Antonio?
You are more likely to see cheaper flights to San Antonio from Ontario when booking 16 weeks ahead of your departure date. In general, you can expect to find flights to San Antonio for around $350 when searching 16 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Antonio from Ontario for as low as $299 on momondo.
What is the cheapest airline that flies from Ontario to San Antonio?
Frontier, Delta, and United Airlines are the most popular carriers operating from Ontario to San Antonio
What airlines fly to San Antonio?
American Airlines, Delta and Spirit Airlines are the top three most popular airlines that fly to San Antonio from Ontario according to our data. American Airlines is the first choice among our users, with 31% of people opting to fly with this airline when traveling to San Antonio. Keep in mind that there are 8 different airlines that fly to San Antonio on a routine basis, so you have a few additional options to choose from.
When to book flights from Ontario to San Antonio
Cheap Ontario to San Antonio (ONT to SAT) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to San Antonio
How far is Ontario to San Antonio by plane?
Ontario and San Antonio are 1167.5 mi apart from one another. A reasonable flight in good conditions will take 4h 15m.
When did momondo last update prices for flights from Ontario Airport to San Antonio Airport?
Prices for flights from Ontario Airport to San Antonio Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to San Antonio Airport?
There are 6 operators available for flights from Ontario Airport to San Antonio Airport as of June 2025.
How old do you have to be to fly from Ontario Airport to San Antonio Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to San Antonio Airport.
What documentation or ID do you need to fly to San Antonio Airport?
The necessary travel and health documents for your San Antonio Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Ontario to San Antonio?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Ontario to San Antonio is American Airlines (40% of total bookings). The next most popular airlines are Southwest (26%), Frontier (19%), and Spirit Airlines (9%).
Best airlines flying from Ontario to San Antonio
Compare and see reviews for airlines that fly from Ontario to San Antonio with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $75 | Free Cancellation | Rating 6.3 8,052 reviews | |||
| PriceFrom $117 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $200 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom $237 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $306 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $308 | Free Cancellation | Rating 8.0 4,287 reviews |
Traveling to a place near San Antonio?
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Why should I use momondo to find a flight deal from Ontario to San Antonio?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Ontario to San Antonio. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Ontario to San Antonio with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Ontario to San Antonio flights to just show those with flexible booking policies.
How can momondo help me find flights from Ontario to San Antonio?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to San Antonio.
I’m not ready to book a flight from Ontario to San Antonio right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to San Antonio from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.