Cheap flights from Ontario to Phoenix from $52 ONT → PHX

Found recently, and the cheapest we hold

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $82 to $237.

At $308, the cheapest return found recently is above that range.

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

Could nearby dates be cheaper?

No. We hold 0-night return fares on 1 other departure date within 3 days of 18 Nov, and it is not cheaper.

Every date we hold

4 fares on 3 departure dates

Which month looks cheapest?

November 2026 is the cheapest month — from $237.

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 44 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $52 to $163.

At $52, 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?

No. We hold one-way fares on 1 other departure date within 3 days of 14 Dec, and it is not cheaper.

Every date we hold

5 fares on 4 departure dates

Which month looks cheapest?

December 2026 is the cheapest month — from $52.

Return

Fares 30 to 59 days before departure were typically 60% lower than 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 11 Nov (49 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 30 to 59 days before departure were typically 42% lower than 7 to 13 days before departure.

From the cheapest one-way each day between 24 Sept and 11 Nov (44 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 Ontario to Phoenix?

The cheapest return found recently is $308 with Frontier Airlines, 18 Nov to 18 Nov, found 3 days ago. The cheapest return we hold, of any age, is $237 with Frontier Airlines, 18 Nov to 21 Nov, found 6 days ago. The cheapest return fare on each of 3 departure dates is usually $261 to $322.

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

The cheapest one-way found recently is $52 with Frontier Airlines, 14 Dec, found 2 days ago. The cheapest one-way fare on each of 4 departure dates is usually $56 to $108.

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

November 2026 is the cheapest month for a return, from $237, 18 Nov to 21 Nov, found 6 days ago. December 2026 is the cheapest month for a one-way, from $52, 14 Dec, found 2 days ago.

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

In 49 days of prices between 24 Sept and 11 Nov, return fares 30 to 59 days before departure were typically 60% lower than 0 to 6 days before departure. In 44 days of prices between 24 Sept and 11 Nov, one-way fares 30 to 59 days before departure were typically 42% lower than 7 to 13 days before departure.

Is there a direct flight from Ontario to Phoenix?

Yes, the cheapest nonstop return found recently is $284 with Southwest Airlines, 4 Mar 2027 to 8 Mar 2027, found 4 days ago. The cheapest nonstop one-way found recently is $114 with American Airlines, 15 Nov, found 3 days ago.

How long is the flight from Ontario to Phoenix?

The cheapest nonstop one-way found recently, with American Airlines on 15 Nov, takes 1 h 25 min from Ontario International Airport (ONT) to Phoenix Sky Harbor International Airport (PHX). The cheapest one-way found recently, with Frontier Airlines on 14 Dec, takes 25 h 31 min with 1 stop.

Which airlines have the cheapest flights from Ontario to Phoenix?

Between 15 Nov and 4 Mar 2027, Frontier Airlines has the cheapest return on 2 of the 3 departure dates we hold, and Southwest Airlines on 1. Between 15 Nov and 15 Dec, Frontier Airlines has the cheapest one-way on 2 of the 4 departure dates we hold, American Airlines on 1 and Southwest Airlines on 1.