Cheap flights from Austin to Ontario from $90 AUS → ONT

Found recently, and the cheapest we hold

What have prices looked like?

Over 45 days, 25 Sept to 11 Nov, the cheapest return we saw each day was $160 to $378.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other 3-night return fares leaving within 3 days of 6 Feb 2027 to compare.

Every date we hold

27 fares on 2 departure dates

Which month looks cheapest?

February 2027 is the cheapest month — from $160.

Found recently, and the cheapest we hold

It is also the cheapest one-way we hold, of any age.

What have prices looked like?

Over 39 days, 26 Sept to 11 Nov, the cheapest one-way we saw each day was $90 to $168.

At $90, the cheapest one-way found recently is at the low end of that range.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other one-way fares leaving within 3 days of 5 Dec to compare.

Every date we hold

3 fares on 3 departure dates

Which month looks cheapest?

December 2026 is the cheapest month — from $90.

Return

Fares 60 to 89 days before departure were typically 38% lower than 7 to 13 days before departure.

From the cheapest return each day between 25 Sept and 11 Nov (45 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.

One-way

Fares 14 to 29 days before departure were typically 28% lower than 0 to 6 days before departure.

From the cheapest one-way each day between 26 Sept and 11 Nov (39 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.

How much is a return flight from Austin to Ontario?

The cheapest return found recently is $210 with Frontier Airlines, 6 Feb 2027 to 9 Feb 2027, found 3 days ago. The cheapest return we hold, of any age, is $160 with Frontier Airlines, 6 Feb 2027 to 8 Feb 2027, found 6 days ago.

How much is a one-way flight from Austin to Ontario?

The cheapest one-way found recently is $90 with Frontier Airlines, 5 Dec, found 3 days ago. The cheapest one-way fare on each of 3 departure dates is usually $116 to $144.

What is the cheapest month to fly from Austin to Ontario?

February 2027 is the cheapest month for a return, from $160, 6 Feb 2027 to 8 Feb 2027, found 6 days ago. December 2026 is the cheapest month for a one-way, from $90, 5 Dec, found 3 days ago.

How far ahead should I book a flight from Austin to Ontario?

In 45 days of prices between 25 Sept and 11 Nov, return fares 60 to 89 days before departure were typically 38% lower than 7 to 13 days before departure. In 39 days of prices between 26 Sept and 11 Nov, one-way fares 14 to 29 days before departure were typically 28% lower than 0 to 6 days before departure.

Is there a direct flight from Austin to Ontario?

Yes, the cheapest nonstop return found recently is $459 with Southwest Airlines, 31 Mar 2027 to 4 Apr 2027, found 4 days ago.

How long is the flight from Austin to Ontario?

The cheapest one-way found recently, with Frontier Airlines on 5 Dec, takes 5 h 46 min with 1 stop.

Which airlines have the cheapest flights from Austin to Ontario?

Between 17 Nov and 21 Dec, Frontier Airlines has the cheapest one-way on all 3 departure dates we hold.