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Isla Grande

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

BOS — SIG
oct. 15 — oct. 221
mié. 10/15
mié. 10/22
1 adult, Economy
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Cheap flight deals from Boston to Isla Grande

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Isla Grande (SIG). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated septiembre 15, 2025.

Popular in

December

Cheapest in

February

Average price

$393
High demand for flights, 13% potential price rise
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Cheapest flight prices on average. 7% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Best time to book a flight from Boston to Isla Grande

Have a flexible travel schedule? Discover the best time to fly to Isla Grande from Boston with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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 septiembre 15, 2025.

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.

Reviews of airlines servicing Isla Grande

Get insights into the airlines that provide service to Isla Grande. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Isla Grande. Reviews last updated septiembre 15, 2025.
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.
JetBlue
7.2
Good
2,912 reviews

Crew

8.0

Food

6.7

Comfort

7.6

Entertainment

7.3

Overall

7.2

Boarding

7.4

Reviews

1 / 20
10.0
Excellent

JACK,Sep 2025

JFK - MSY

I liked the professional services of the crew. Keep up the good work.
JetBlue
7.2
Good
2,912 reviews
JetBlue
7.2
Good
2,912 reviews

Crew

8.0

Food

6.7

Comfort

7.6

Entertainment

7.3

Overall

7.2

Boarding

7.4

Reviews

1 / 20
10.0
Excellent

JACK,Sep 2025

JFK - MSY

I liked the professional services of the crew. Keep up the good work.
Frontier
5.8
Fair
3,172 reviews
JetBlue
7.2
Good
2,912 reviews

Crew

8.0

Food

6.7

Comfort

7.6

Entertainment

7.3

Overall

7.2

Boarding

7.4

Reviews

1 / 20
10.0
Excellent

JACK,Sep 2025

JFK - MSY

I liked the professional services of the crew. Keep up the good work.

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?

    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.

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

    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 $248 round trip. These flights start at 79% lower than the current average price 3 months from now.

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

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

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

    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.

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

    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.

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

    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.

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Top 2 airlines flying from Boston to Isla Grande

Discover the top 2 airlines that operate flights from Boston to Isla Grande. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$59Average$144FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$248Average$384FlexibilityNo cancel feeOn-time62%

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