Austin to Ontario flights
The cheapest round trip we found from Austin to Ontario is $171 (Feb 6 – 8, 2027, 1 stop), 1% below the usual $172.
AUS to ONT · Round trip · Economy · Prices per person in USD · Price found (1 day ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $236 |
| December 2026 | No fares found yet |
| January 2027 | $172 |
| February 2027 | $171 (cheapest month) |
Cheapest dates in the next 4 months
Round trip, per person-
Feb 6 – 8, 2027 2 nights · leave Sat$171$171 Book
Frontier Airlines 1 stop · 4h 51m -
Jan 25 – Feb 7, 2027 13 nights · leave Mon$172$172 Book
Frontier Airlines 1 stop · 4h 51m
-
Nov 28 – 30 2 nights · leave Sat$236 +37% vs usual$236 +37% vs usual Book
Frontier Airlines 1 stop · 4h 12m
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 6 – 8, 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)
Partner links: we may earn a commission if you book, at no extra cost to you.
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Austin to Ontario: questions
How much does a flight from Austin to Ontario cost?
The cheapest round trip we have found right now is $171, leaving February 6 and returning February 8. The usual price on this route is about $172, so this fare is 1% less. Prices are per person, economy, in USD.
What is the cheapest month to fly from Austin to Ontario?
February 2027, with round trips from $171. The most expensive month in our data is November (from $236). Based on the 3 months ahead we have prices for.
Which airports do Austin to Ontario flights use?
Austin airports include Austin-Bergstrom International (AUS). Ontario airports include Ontario International (ONT). The prices on this page cover every airport in both cities (AUS and ONT are the city codes).
About this route
We track round-trip economy fares from Austin (United States) to Ontario (United States) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $171, departing February 6 and returning February 8, about 1% below the usual $172. The cheapest month to fly in our data is February, from $171. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.