Cheap flights from Ontario to Miami from $131 ONT → MIA

Found recently, and the cheapest we hold

It is also the cheapest return we hold, of any age.

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $227 to $322.

At $323, the cheapest return found recently is above that range.

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

Could nearby dates be cheaper?

We hold no other 11-night return fares leaving within 3 days of 3 Dec to compare.

Every date we hold

129 fares on 17 departure dates

Which month looks cheapest?

December 2026 is the cheapest month — from $323.

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 49 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $98 to $192.

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 12 Dec to compare.

Every date we hold

48 fares on 12 departure dates

Which month looks cheapest?

December 2026 is the cheapest month — from $131.

Return

Fares 30 to 59 days before departure were typically 22% 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 14 to 29 days before departure were typically 59% lower than 0 to 6 days before departure.

From the cheapest one-way 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.

How much is a return flight from Ontario to Miami?

The cheapest return found recently is $323 with Frontier Airlines, 3 Dec to 14 Dec, found yesterday. The cheapest return fare on each of 17 departure dates is usually $377 to $489.

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

The cheapest one-way found recently is $131 with Frontier Airlines, 12 Dec, found 2 days ago. The cheapest one-way fare on each of 12 departure dates is usually $175 to $262.

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

December 2026 is the cheapest month for a return, from $323, 3 Dec to 14 Dec, found yesterday. It is the cheapest month for a one-way too, from $131, 12 Dec, found 2 days ago.

Every date in December 2026

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

In 49 days of prices between 24 Sept and 11 Nov, return fares 30 to 59 days before departure were typically 22% lower than 0 to 6 days before departure. One-way fares 14 to 29 days before departure were typically 59% lower than 0 to 6 days before departure.

How long is the flight from Ontario to Miami?

The cheapest one-way found recently, with Frontier Airlines on 12 Dec, takes 24 h 32 min with 2 stops, including a 14 h connection.

Which airlines have the cheapest flights from Ontario to Miami?

Between 13 Nov and 6 Sept 2027, Frontier Airlines has the cheapest return on 14 of the 17 departure dates we hold, American Airlines on 2 and United Airlines on 1. Between 12 Dec and 16 Sept 2027, Frontier Airlines has the cheapest one-way on 8 of the 12 departure dates we hold, Southwest Airlines on 3 and American Airlines on 1.