Cheap flights from Boston to San Juan from C$ 243

The month of January is, on average, the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport from Boston, with most prices found around C$ 384. If you don’t want to visit San Juan Luis Munoz Marin Intl Airport in January, then you should wait until March to fly from Boston, when ticket prices are also cheap, with an average price of C$ 417.

The cheapest day to depart on your flight to San Juan Luis Munoz Marin Intl Airport is on a Sunday when prices can be found for as low as C$ 367. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Boston to San Juan Luis Munoz Marin Intl Airport for around C$ 524.

The cheapest time of day to fly to San Juan Luis Munoz Marin Intl Airport is in the evening when flights can be purchased for as low as C$ 398. In the morning is when there is more demand to fly to San Juan Luis Munoz Marin Intl Airport, so prices are often more expensive at around C$ 456 per ticket.

Fly from Boston Logan Intl to San Juan Luis Munoz Marin Intl for the best Boston Logan Intl - San Juan Luis Munoz Marin Intl flight prices

You are more likely to see cheaper flights to San Juan Luis Munoz Marin Intl Airport from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan Luis Munoz Marin Intl Airport for around C$ 498 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan Luis Munoz Marin Intl Airport from Boston for as low as C$ 452 on momondo.

There is only 1 cabin class available to choose from on Boston to San Juan Luis Munoz Marin Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Historically, on average around 27% of flights between Boston and San Juan have experienced a delay on any given week. The average delay length over the past 12 months has been 155 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Delta has had the least delays on this route over the last 12 months, with about 19% of their flights experiencing any sort of delay.

As of September 2026, 5 flights take off from Boston and land in San Juan Luis Munoz Marin Intl Airport each day. The most common flight departure time for this route is 7:00a.m., with 53% of daily flights taking off at noon.

As of September 2026, 39 flights take off from Boston and land in San Juan Luis Munoz Marin Intl Airport each week. The most common flight departure day for this route is Sun, with 23% of weekly flights taking off on this day.