San Antonio to Ontario flights
The cheapest round trip we found from San Antonio to Ontario is $266 (Feb 7 – 9, 2027, 1 stop). It usually costs $266.
SAT to ONT · Round trip · Economy · Prices per person in USD · Price found (3 days ago)
Cheapest found
Buy now or wait? We're still learning this route. We have 5 days of prices so far and need about a week to say whether to book or wait.
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | No fares found yet |
| December 2026 | $217 (cheapest month) |
| January 2027 | No fares found yet |
| February 2027 | $266 |
| March 2027 | No fares found yet |
| April 2027 | No fares found yet |
| May 2027 | No fares found yet |
| June 2027 | No fares found yet |
| July 2027 | No fares found yet |
| August 2027 | No fares found yet |
| September 2027 | $551 |
Cheapest dates in the next 4 months
Round trip, per person-
Feb 7 – 9, 2027 2 nights · leave Sun$266$266 Book
Frontier Airlines 1 stop · 5h 05m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Plan the rest of your trip
Ontario · Feb 7 – 9, 2027- Car rental Economybookings · compare rental companies (opens Economybookings in a new tab)
- Things to do in Ontario Klook · tours and tickets (opens Klook in a new tab)
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San Antonio to Ontario: questions
How much does a flight from San Antonio to Ontario cost?
The cheapest round trip we have found right now is $266, leaving February 7 and returning February 9. The usual price on this route is about $266. Prices are per person, economy, in USD.
What is the cheapest month to fly from San Antonio to Ontario?
December 2026, with round trips from $217. The most expensive month in our data is September (from $551). Based on the 3 months ahead we have prices for.
Which airports do San Antonio to Ontario flights use?
San Antonio airports include San Antonio International (SAT). Ontario airports include Ontario International (ONT). The prices on this page cover every airport in both cities (SAT and ONT are the city codes).
About this route
We track round-trip economy fares from San Antonio (United States) to Ontario (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $266, departing February 7 and returning February 9. The cheapest month to fly in our data is December, from $217. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.