Cheap flights from San Antonio to Ontario from $54
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Antonio to Ontario departing on 3/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from San Antonio to Los Angeles
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Frontier flights from San Antonio to Ontario
Our best Frontier deals on San Antonio to Ontario flight tickets
Delta flights from San Antonio to Ontario
Our best Delta deals on San Antonio to Ontario flight tickets
See travel insights to Los Angeles from
How to get the cheapest flight ticket from San Antonio to Ontario
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 Ontario?
In general, February is the cheapest month to fly from San Antonio to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $236. If you aren’t able to travel during the month of February, then book flights to Ontario from San Antonio during August instead. Flights to Ontario in August, while not as cheap as those in February, still average around $243.
What is the cheapest day to depart on your flight to Ontario?
The cheapest day to depart on your flight to Ontario is on a Friday when prices can be found for as low as $277. This is often the case because there is less demand to fly during this day of the week. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from San Antonio to Ontario for around $359.
What is the cheapest time of day to depart on your flight to Ontario?
In the evening is the cheapest time of day to fly from San Antonio to Ontario when you can find flight prices for as low as $241. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $356 on average. Flights to Ontario from San Antonio in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.
How far in advance should I book a flight to Ontario?
You are more likely to see cheaper flights to Ontario from San Antonio when booking 15 weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $326 when searching 15 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from San Antonio for as low as $200 on momondo.
What is the cheapest airline that flies from San Antonio to Ontario?
Frontier, Delta, and American Airlines are the most popular carriers operating from San Antonio to Ontario
What airlines fly to Ontario?
American Airlines, Delta and Spirit Airlines are the top three most popular airlines that fly to Ontario from San Antonio according to our data. American Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 8 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.
When to book flights from San Antonio to Ontario
Cheap San Antonio to Ontario (SAT to ONT) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from San Antonio to Ontario
How far is San Antonio to Ontario by plane?
The distance between San Antonio and Ontario is about 1167.5 mi. Typically, this will take 4h 29m by plane in normal conditions.
When did momondo last update prices for flights from San Antonio Airport to Ontario Airport?
Prices for flights from San Antonio Airport to Ontario Airport are refreshed on a daily basis.
How many operators does momondo search for flights from San Antonio Airport to Ontario Airport?
There are 6 operators available for flights from San Antonio Airport to Ontario Airport as of February 2025.
How old do you have to be to fly from San Antonio Airport to Ontario 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 San Antonio Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The necessary travel and health documents for your Ontario 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 San Antonio to Ontario?
Based on momondo bookings for flights between San Antonio and Ontario, the leading airline is American Airlines, making up 42% of the total bookings. Other popular airlines include Frontier with 25%, Spirit Airlines with 14%, and Southwest with 10%.
Best airlines flying from San Antonio to Ontario
Compare and see reviews for airlines that fly from San Antonio to Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $43 | Free Cancellation | Rating 6.3 8,013 reviews | |||
| PriceFrom $124 | Free Cancellation | Rating 6.0 3,355 reviews | |||
| PriceFrom $179 | Free Cancellation | Rating 8.0 8,220 reviews | |||
| PriceFrom $256 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $311 | Free Cancellation | Rating 8.1 4,411 reviews | |||
| PriceFrom $356 | Free Cancellation | Rating 7.4 8,766 reviews |
Southwest Flights From San Antonio to Ontario
Across 6 Southwest flights from San Antonio to Ontario this week, the average price was $414, with the best Southwest deals starting from $311 round-trip. 4,411 users have rated Southwest on momondo, with an average score of 8.1/10.
Why use momondo?
Why should I use momondo to find a flight deal from San Antonio to Ontario?
Finding the right flight to Ontario from San Antonio is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.
Can I find flights from San Antonio to Ontario with flexible booking policies on momondo?
Yes. All flights to Ontario from San Antonio on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from San Antonio to Ontario?
Once all potential San Antonio to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from San Antonio to Ontario right now. Can momondo alert me if prices change?
Price alerts on flights to Ontario from San Antonio are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.