Question 1

What are the cheapest airlines flying from Boston to San Juan Isla Grande Airport round-trip?

Accepted Answer

Flying on Frontier is currently your cheapest option to San Juan Isla Grande Airport, with prices starting at $59. Another option worth looking into is JetBlue, starting at $197 round trip. These flights start at 75% lower than the current average price 3 months from now.

Question 2

What is the cheapest month to book a flight from Boston to San Juan Isla Grande Airport?

Accepted Answer

Currently, September is the cheapest month in which you can book a flight from Boston to San Juan Isla Grande Airport (average of $164). Flying from Boston to San Juan Isla Grande Airport in June is currently the most expensive (average of $344). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 3

What is the cheapest day to fly from Boston to San Juan Isla Grande Airport?

Accepted Answer

Travelers seeking maximum savings on their Boston to San Juan Isla Grande Airport flight should consider departing on Saturday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Question 4

E

Accepted Answer

In terms of precipitation, rainfall in San Juan Isla Grande Airport ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit San Juan Isla Grande Airport when rainfall is around 2.2 in.

Question 5

E

Accepted Answer

If weather is an important factor for your trip to San Juan Isla Grande Airport, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

Question 6

What is the cheapest day to fly round-trip from Boston to San Juan Isla Grande Airport?

Accepted Answer

It’s generally more expensive to depart on a Monday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

Question 7

How far in advance should I book a flight from Boston to San Juan Isla Grande Airport?

Accepted Answer

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 27 days in advance, which can save you up to 5% on flights from Boston to San Juan Isla Grande Airport compared to booking the week you need them. Waiting 27 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $225. For sooner than that we have options available in the next 3 days from $264.

Question 8

What is the cheapest month to fly from Boston to San Juan Isla Grande Airport?

Accepted Answer

September can be a great time to fly to San Juan Isla Grande Airport from Boston with a flight ticket averaging about $280. Cheapflights users have found deals in the month of September for as cheap as $56. The most expensive prices can be found in the month of December.

Question 9

What is the cheapest time of day to fly from BOS to SIG?

Accepted Answer

One of the essential ways to save on airfare from Boston to San Juan Isla Grande Airport is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 29% on airfare.

Question 10

What airport do you fly from for flights from Boston to San Juan Isla Grande?

Accepted Answer

Boston Logan Intl (BOS), located 2.6 mi from the city center, is the airport you fly out of when you book flights from Boston to San Juan Isla Grande. 2 airlines have flights from Logan Intl to San Juan Isla Grande on a regular basis. Booking flights from Boston Logan Intl to San Juan Isla Grande should not be difficult; the airport handles an average of 0 outbound flights to San Juan Isla Grande per day.

Question 11

Can I find deals for flights from Boston to Isla Grande that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Boston to Isla Grande flights, Cheapflights offers vacation packages that include both flights and hotel.

Question 12

How can I find direct flights from Boston to Isla Grande?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Isla Grande.

Question 13

Can I find deals for business class flights from Boston to Isla Grande?

Accepted Answer

Yes. Cheapflights offers flight deals from Boston to Isla Grande by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Popular in	April
Cheapest in	February
Average price	$213

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$59	Average$144	FlexibilityNo cancel fee	On-time62%
JetBlue	Cheapest$197	Average$361	FlexibilityNo cancel fee	On-time62%

Cheap flights from Boston (BOS) to Isla Grande (SIG)

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Everything you need to know about your flight from Boston to San Juan Isla Grande Airport

What is the cheapest time of day to fly from BOS to SIG?

Find hourly flight availability from Boston to Isla Grande. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

Reviews of airlines servicing Isla Grande

Peruse reviews from past customers who have flown with JetBlue and Frontier from Boston to San Juan Isla Grande Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Boston to Isla Grande. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Boston to San Juan Isla Grande?

What are the cheapest airlines flying from Boston to San Juan Isla Grande Airport round-trip?

Can I find deals for flights from Boston to Isla Grande that include hotel bookings?

How can I find direct flights from Boston to Isla Grande?

Can I find deals for business class flights from Boston to Isla Grande?

What is the cheapest month to book a flight from Boston to San Juan Isla Grande Airport?

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Top 2 airlines flying from Boston to Isla Grande

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