Ontario to Austin ONT → AUS
Ontario International Airport (ONT) → Austin-Bergstrom International Airport (AUS)
The cheapest return found recently is $425 with Alaska Airlines, 21 Aug 2027 – 25 Aug 2027, found today.
Return
The cheapest return fare on each of 4 departure dates is usually $290 to $402.
Cheapest return found recently
$425
21 Aug 2027 – 25 Aug 2027 · Alaska Airlines
Ontario International Airport (ONT) → Austin-Bergstrom International Airport (AUS)
Leaves 12:04 p.m. · Return leaves 1:55 p.m. · 13 h 43 min of travel, both ways together
out 1 stop, back nonstop
found today
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$425 21 Aug 2027 – 25 Aug 2027found todaySee prices for these dates
$194 5 Nov – 7 Novfound 4 days agoSee prices for these dates
What have prices looked like?
Over 19 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $194 to $416.
At $425, the cheapest return found recently is above that range.
19 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 return price?
Compared with the cheapest return fare on each of 4 departure dates from 28 Oct to 21 Aug 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?
We hold no other 4-night return fares leaving within 3 days of 21 Aug 2027 to compare.
Every date we hold
5 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 28 Oct – 1 Nov | $322 | Southwest Airlines | Ontario International Airport (ONT) → Austin-Bergstrom International Airport (AUS) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 29 Oct – 1 Nov | $394 | Frontier Airlines | Ontario International Airport (ONT) → Austin-Bergstrom International Airport (AUS) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 5 Nov – 7 Nov | $194 | Frontier Airlines | Ontario International Airport (ONT) → Austin-Bergstrom International Airport (AUS) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 21 Aug 2027 – 25 Aug 2027 | $425 | Alaska Airlines | Ontario International Airport (ONT) → Austin-Bergstrom International Airport (AUS) | out 1 stop, back nonstop | found today | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $194.
Airlines on the cheapest dates: Frontier Airlines, Southwest Airlines, Alaska Airlines.
Premium cabin fares from Ontario to Austin
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 21 Aug 2027 – 25 Aug 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to Austin?
Return
Fares 14 to 29 days before departure were typically 19% lower than 7 to 13 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (19 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 7–13 days | $243 | $243 | +23% | 11 |
| 14–29 days | $198 | $194 | Cheapest seen | 10 |
| 90–179 days | $402 | $387 | +103% | 8 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Los Angeles → Austin
56 km from Ontario
$392
$33 less than flying from Ontario
21 Aug 2027 – 25 Aug 2027 · LAX → AUS · out 1 stop, back 1 stop
found today
Ontario → San Antonio
118 km from Austin
$285
$140 less than flying to Austin
24 Oct – 9 Nov · ONT → SAT · out 1 stop, back 1 stop
found 3 days ago
Ontario → Killeen
95 km from Austin
$552
$127 more than flying to Austin
6 Dec – 7 Dec · ONT → GRK · out 1 stop, back 1 stop
found 3 days ago
Long Beach → Austin
60 km from Ontario
$323
$102 less than flying from Ontario
5 Nov – 7 Nov · LGB → AUS · out 1 stop, back 1 stop
found 4 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Palm Springs → Austin
104 km from Ontario
$290
24 Oct · PSP → AUS · 1 stop
found 5 days ago
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 return found recently is for 21 Aug 2027 – 25 Aug 2027. A live search on this page shows what those dates cost now, for one adult in economy.
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