Boston to San Juan flights
The cheapest round trip we found from Boston to San Juan is $726 (Nov 24 – 29, 1 stop). It usually costs $345.
BOS to SJU · Round trip · Economy · Prices per person in USD · Price found (4 hours ago)
Cheapest found
Cheapest round trip by month
Lowest fare found per departure month| Month | Cheapest round trip |
|---|---|
| November 2026 | $345 |
| December 2026 | No fares found yet |
| January 2027 | No fares found yet |
| February 2027 | $245 (cheapest month) |
| March 2027 | No fares found yet |
| April 2027 | $617 |
Cheapest dates in the next 4 months
Round trip, per person-
Nov 24 – 29 5 nights · leave Tue$726 +110% vs usual$726 +110% vs usual Book
Frontier Airlines 1 stop · 5h 43m
Prices change often. The booking site shows the final price before you pay. Other dates? Set an alert
Plan the rest of your trip
San Juan · Nov 24 – 29- Car rental Economybookings · compare rental companies (opens Economybookings in a new tab)
- Things to do in San Juan Klook · tours and tickets (opens Klook in a new tab)
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Boston to San Juan: questions
How much does a flight from Boston to San Juan cost?
The cheapest round trip we have found right now is $726, leaving November 24 and returning November 29. The usual price on this route is about $345. Prices are per person, economy, in USD.
What is the cheapest month to fly from Boston to San Juan?
February 2027, with round trips from $245. The most expensive month in our data is April (from $617). Based on the 3 months ahead we have prices for.
Which airports do Boston to San Juan flights use?
Boston airports include Logan International (BOS) and Pease Air Force Base (PSM). San Juan airports include Luis Munoz Marin International (SJU) and Isla Grande (SIG). The prices on this page cover every airport in both cities (BOS and SJU are the city codes).
About this route
We track round-trip economy fares from Boston (United States) to San Juan (Puerto Rico) using Travelpayouts / Aviasales data. The cheapest round trip we've found is $726, departing November 24 and returning November 29. The cheapest month to fly in our data is February, from $245. Prices are per person and were correct when found; the final price is set by the airline or booking site when you book.