Cheap Flights from Boston to San Juan

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The latest fare from Boston to San Juan: $309 round trip, Jan 9 – Jan 15, seen Nov 9. Prices by month are below.

Across 4 months of observations from Boston to San Juan, the lowest round-trip economy fare we recorded was $165, in November. The typical economy fare was $355. November was the cheapest month we saw and September the dearest.

The most recent economy price we saw on this route was $309 on Frontier, seen Nov 9.

See every deal from Boston, to San Juan, or the return direction San Juan to Boston.

Latest economy price we saw: Boston to San Juan

The most recent economy round-trip fare we saw on this route.

From	Price	Per mile	Travel dates	Airline	Seen
Boston (BOS) to San Juan (SJU)	$309	9.2¢	Jan 9 – Jan 15	Frontier	Nov 9

Economy price history: Boston to San Juan

The lowest fares we saw each month.

Month	Low	Typical	Sightings
Nov 2026	$165	$376	56
Oct 2026	$285	$363	150
Sep 2026	$300	$391	88
Aug 2026	$191	$289	324

Frequently asked questions

How many flight deals from Boston to San Juan are on Sparkflights right now?

There are 0 deals from Boston to San Juan on the board right now.

What is the lowest price ever seen from Boston to San Juan?

The lowest economy fare we've recorded from Boston to San Juan is $165, based on 618 price observations over 4 months.

How much does a flight from Boston to San Juan cost?

The typical round-trip economy fare we observed from Boston to San Juan is $355, against a recorded low of $165. These are observations, not quotes.

When is the cheapest month to fly Boston to San Juan?

For economy fares from Boston to San Juan, November was the cheapest month we observed and September the dearest, over 4 months of data.

What is the current price from Boston to San Juan?

The most recent economy fare we saw from Boston to San Juan is $309, on Nov 9.