Boston to San Juan · 30-day trend
Median fare $143 · 30-day low $54. Snapshots updated daily (last: Aug 14, 2026).
What this means
Each point on the chart above is the cheapest cached round-trip fare from Boston (BOS) to San Juan (SJU) on that snapshot day, sourced nightly from our travel-data partner Travelpayouts.
The median is the typical asking price for this route across a rolling 30-day window — half of recent snapshots were cheaper, half more expensive. The low is what your fare-floor target should be if your dates are flexible; the high tells you what to walk away from.
Ready to book?
Cached prices give you the baseline. For your exact dates, search live fares — Aviasales checks every major OTA in one query.
See our best-time-to-book guide for BOS → SJU →Target price, booking window, weekday pattern.
Related travel pages
Data: 30-day rolling window of cheapest cached round-trip fares from Travelpayouts, snapshotted nightly. Actual fares for your specific dates and travel class will vary — we link to live search above for current pricing. Index last updated Aug 14, 2026.