Cheap flights from Ontario to San Antonio from $300 ONT → SAT
Ontario International Airport (ONT) → San Antonio International Airport (SAT)
The cheapest one-way found recently is $300 with American Airlines, 1 Sept 2027, found yesterday.
- Cheapest one-way found recently
- $300, found yesterday
- Cheapest month to fly
- March 2027, one-way fares from $217 found in the last 7 days
One-way
The cheapest one-way fare on each of 3 departure dates is usually $259 to $303.
Cheapest one-way found recently
$300
1 Sept 2027 · American Airlines
Ontario International Airport (ONT) → San Antonio International Airport (SAT)
Leaves 6:15 a.m. · 5 h 6 min trip
1 stop
found yesterday
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$300 1 Sept 2027found yesterdayOpen this trip
$217 23 Mar 2027found 3 days agoOpen this trip
What have prices looked like?
Over 18 days, 29 Sept to 12 Nov, the cheapest one-way we saw each day was $98 to $217.
At $300, the cheapest one-way found recently is above that range.
18 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 3 departure dates from 23 Mar 2027 to 2 Sept 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
No. We hold one-way fares on 1 other departure date within 3 days of 1 Sept 2027, and it is not cheaper.
Every date we hold
3 fares on 3 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 23 Mar 2027 | $217 | Frontier Airlines | Ontario International Airport (ONT) → San Antonio International Airport (SAT) | 1 stop | found 3 days ago | Open this trip |
| 1 Sept 2027 | $300 | American Airlines | Ontario International Airport (ONT) → San Antonio International Airport (SAT) | 1 stop | found yesterday | Open this trip |
| 2 Sept 2027 | $305 | American Airlines | Ontario International Airport (ONT) → San Antonio International Airport (SAT) | 1 stop | found today | Open this trip |
Which month looks cheapest?
March 2027 is the cheapest month — from $217.
Airlines on the cheapest dates: American Airlines, Frontier Airlines.
Premium cabin fares from Ontario to San Antonio
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 1 Sept 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to San Antonio?
One-way
Not enough history yet: in 18 days of one-way prices, 29 Sept to 12 Nov, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Ontario → Austin
118 km from San Antonio
$237
10 Dec – 14 Dec · ONT → AUS · out 1 stop, back 1 stop
found yesterday
Long Beach → San Antonio
60 km from Ontario
$548
23 Nov – 27 Nov · LGB → SAT · out 1 stop, back 1 stop
found 2 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Ontario → Austin
118 km from San Antonio
$112
$188 less than flying to San Antonio
14 Jan 2027 · ONT → AUS · 1 stop
found 3 days ago
Los Angeles → San Antonio
56 km from Ontario
$222
$78 less than flying from Ontario
10 Dec · BUR → SAT · 2 stops
found yesterday
Long Beach → San Antonio
60 km from Ontario
$253
$47 less than flying from Ontario
1 Sept 2027 · LGB → SAT · 1 stop
found yesterday
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest one-way found recently is for 1 Sept 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a one-way flight from Ontario to San Antonio?
The cheapest one-way found recently is $300 with American Airlines, 1 Sept 2027, found yesterday. The cheapest one-way we hold, of any age, is $217 with Frontier Airlines, 23 Mar 2027, found 3 days ago. The cheapest one-way fare on each of 3 departure dates is usually $259 to $303.
What is the cheapest month to fly from Ontario to San Antonio?
March 2027 is the cheapest month for a one-way, from $217, 23 Mar 2027, found 3 days ago.
How long is the flight from Ontario to San Antonio?
The cheapest one-way found recently, with American Airlines on 1 Sept 2027, takes 5 h 6 min with 1 stop.
Which airlines have the cheapest flights from Ontario to San Antonio?
Between 23 Mar 2027 and 2 Sept 2027, American Airlines has the cheapest one-way on 2 of the 3 departure dates we hold, and Frontier Airlines on 1.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work