Cheap flights from Miami to San Juan from $51 MIA → SJU

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 $60 to $124.

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

Could nearby dates be cheaper?

We hold no other 7-night return fares leaving within 3 days of 5 Dec to compare.

Every date we hold

31 fares on 6 departure dates

Which month looks cheapest?

December 2026 is the cheapest month — from $98.

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 $40 to $128.

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 1 Dec to compare.

Every date we hold

7 fares on 7 departure dates

Which month looks cheapest?

December 2026 is the cheapest month — from $51.

Return

Fares 14 to 29 days before departure were typically 15% 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 7 to 13 days before departure were typically 44% 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 Miami to San Juan?

The cheapest return found recently is $98 with Frontier Airlines, 5 Dec to 12 Dec, found 2 days ago. The cheapest return fare on each of 6 departure dates is usually $143 to $350.

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

The cheapest one-way found recently is $51 with Frontier Airlines, 1 Dec, found yesterday. The cheapest one-way fare on each of 7 departure dates is usually $69 to $158.

What is the cheapest month to fly from Miami to San Juan?

December 2026 is the cheapest month for a return, from $98, 5 Dec to 12 Dec, found 2 days ago. It is the cheapest month for a one-way too, from $51, 1 Dec, found yesterday.

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

In 49 days of prices between 24 Sept and 11 Nov, return fares 14 to 29 days before departure were typically 15% lower than 0 to 6 days before departure. One-way fares 7 to 13 days before departure were typically 44% lower than 0 to 6 days before departure.

Is there a direct flight from Miami to San Juan?

Yes, the cheapest nonstop return found recently is $98 with Frontier Airlines, 5 Dec to 12 Dec, found 2 days ago. The cheapest nonstop one-way found recently is $51 with Frontier Airlines, 1 Dec, found yesterday.

How long is the flight from Miami to San Juan?

The cheapest nonstop one-way found recently, with Frontier Airlines on 1 Dec, takes 2 h 41 min from Miami International Airport (MIA) to Luis Munoz Marin International Airport (SJU).

Which airlines have the cheapest flights from Miami to San Juan?

Between 25 Nov and 1 Jun 2027, Frontier Airlines has the cheapest return on 5 of the 6 departure dates we hold, and American Airlines on 1. Between 16 Nov and 1 Jul 2027, Frontier Airlines has the cheapest one-way on 5 of the 7 departure dates we hold, and Southwest Airlines on 2.