Boston → San Juan flights

Boston–San Juan: target $100–$102 and monitor closely

Key takeaways

• Median fare is $102, making this one of the more affordable Caribbean routes out of Boston.
• Bottom-quartile fares (p25) start at $100 — only a $2 gap below median, so bargains don't last long when they appear.
• The low recorded fare was $87, roughly 15% below median; snagging that price requires timing and flexibility.
• Top-quartile fares reach $119 (p75), and the ceiling hits $123 — a spread of 41% from low to high signals real price volatility worth watching.
• Sample size is 17 days — below the 30-snapshot ideal, so treat these figures as directional rather than definitive.

30-day price trend

See full numbers and stats on the BOS → SJU price history page.

The full picture

Boston to San Juan is priced competitively by Caribbean-route standards, with a median fare of $102 across 17 daily snapshots of the cheapest available cached fares. The interquartile range — $100 at p25 to $119 at p75 — tells a nuanced story: most of the time, fares cluster tightly just above $100, but they can spike toward $120 with relatively little warning. The 41% spread from the $87 low to the $123 high is meaningful and suggests this route does move, even if the absolute dollar amounts remain modest.

From a booking-horizon standpoint, fares near or below the $100 p25 threshold represent genuine low-end pricing for this route and are worth acting on promptly. The narrow gap between p25 ($100) and the median ($102) implies that sub-median deals evaporate quickly — when prices soften, they don't stay soft for long. Conversely, fares above $119 (p75) indicate you're in elevated territory and it may be worth waiting a short window if travel dates allow flexibility, though no pattern in this dataset guarantees a subsequent drop.

No dominant carrier signal is available in this dataset, so route-specific airline strategies cannot be responsibly cited here. What the data does support: this route rewards active monitoring over set-and-forget booking. Set a fare alert at or below $100 and treat anything at the median ($102) as fair value. One honest caveat: with only 17 snapshots rather than a full 30-day window, these figures carry more statistical uncertainty than ideal — treat the $87 low as an occasional outlier rather than a repeatable target, and the $102 median as your most reliable planning anchor.

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