Boston → San Juan flights

Fares cluster near $148 — book anytime, skip only the outliers

Key takeaways

• $148 median fare across all 30 sampled days in the last month
• The middle half of fares sit between $147 and $149 — an unusually tight band
• Low end reaches $132, barely below the median
• High end spikes to $246, but this looks like an outlier rather than the norm
• Full coverage: 30 of 30 days in the window had a cached fare, giving high confidence in this read

30-day price trend

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

The full picture

The data here tells a clear story: Boston to San Juan fares are remarkably stable. With a median of $148 and the middle half of all sampled fares squeezed between $147 and $149, there's very little day-to-day variation in the typical price. The $86% spread figure looks dramatic on paper, but it's driven almost entirely by a handful of high-end fares near $246 — most days, you're looking at something within a few dollars of $148, not a wide range of outcomes.

Because the bulk of fares are so tightly clustered, there isn't much evidence of a strong booking-window effect here. Unlike routes where waiting (or booking early) swings the price by 40-50%, this one suggests the opposite: the fare you see on a given day is close to what you'll see most other days too. The $246 high end is worth noting as a ceiling to avoid rather than a pattern to plan around — it likely reflects a specific high-demand date or a last-minute fare rather than a seasonal trend.

We don't have enough signal in this data to point to a specific weekday or carrier pattern — the payload doesn't break out day-of-week or airline-level detail, so we won't speculate on either. The honest takeaway is that this route is low-risk for overpaying: with full 30-day coverage and a tight interquartile range, there's little incentive to time your purchase precisely. The main actionable advice is simply to treat anything meaningfully above $150 as pricier than typical, and anything near $132-$148 as a normal, good fare.

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  Boston → San Juan
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