Cheap flights from Boston to San Juan
Live fare found May 7 from $198. Typical low $180. Compare 100+ booking sites.
Live fare
$198
May 7 — May 12
1 stop
1 stop
Updated April 19 at 5:55 PM· via Travelpayouts partner feed
When to fly BOS to San Juan
Best months for the cheapest fares on this route: Year-round.
JetBlue keeps this BOS-SJU route aggressively priced.
How to get the best price on this route
- Book 6–8 weeks ahead for international routes; 3–4 weeks for short-haul.
- Fly midweek (Tue/Wed) — weekend departures cost 15–25% more.
- Compare across 100+ booking sites. Our partner feed surfaces vendors you’ve never heard of that often beat the majors.
- Set a price alert below to be the first to know when the fare drops below $180.
Make it a trip
Stay in San Juan
Bundle flight + hotel to save another 10–20%. Pricing via Expedia.