BOS - SIG

Find cheap flights from Boston to San Juan Isla Grande

1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Juan Isla Grande Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to San Juan, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to San Juan, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Boston to Isla Grande (BOS-SIG)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Isla Grande that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Isla Grande

Multiple Airlines Logo
BOS-SIG
1676 mimulti-stop
Multiple Airlines Logo
SIG-BOS
1676 mimulti-stop
Multiple Airlines
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Everything you should know

Cheapest round-trip
Multiple Airlines
Tue 11/4
BOS - SIG • multi-stop
Cheapest one-way
Multiple Airlines
Tue 11/4
BOS - SIG • multi-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Isla Grande!
Booking Insights

KAYAK's insights & trends for Boston to Isla Grande flights

Get data-powered insights and trends into flights from Boston to Isla Grande to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Boston to San Juan Isla Grande?

The average price of all round-trip flights from Boston to San Juan Isla Grande Airport clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Boston to San Juan Isla Grande, look for departures on Tuesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from San Juan Isla Grande, Friday is the cheapest day to fly and Thursday is the most expensive.

Good to know

Most popular time to fly and prices are also 23% lower on average.

When to book flights from Boston to Isla Grande

Are your dates flexible? Find out the best times to travel from Boston to Isla Grande based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Boston to San Juan Isla Grande flights

  • Do I need a passport to fly between Boston and San Juan Isla Grande?

    Yes

  • Which aircraft models fly most regularly from Boston to San Juan Isla Grande?

    We unfortunately don’t have that data for this specific route.

  • Which is the best airline for flights from Boston to San Juan, JetBlue or Frontier?

    The two airlines most popular with KAYAK users for flights from Boston to San Juan are JetBlue and Frontier. With an average price for the route of $384 and an overall rating of 7.2, JetBlue is the most popular choice. Frontier is also a great choice for the route, with an average price of $225 and an overall rating of 5.8.

  • How does KAYAK find such low prices on flights from Boston to San Juan Isla Grande?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to San Juan Isla Grande.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to San Juan Isla Grande?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan Isla Grande from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to San Juan Isla Grande?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Juan Isla Grande with an airline and back to Boston with another airline. Booking your flights between Boston and SIG can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to San Juan Isla Grande?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Juan Isla Grande from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Boston to Isla Grande

 
See real verified KAYAK customer reviews for airlines flying from Boston to San Juan. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to Isla Grande? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
JetBlueOverall score based on 2907 reviews
7.3Entertainment
7.6Comfort
6.7Food
7.4Boarding
8.0Crew
Airline reviews

Checking In on JetBlue site was impossible. It hung up on REAL ID. Even my Global Entry did not help. Luckily, on Kayak site it was a breeze. Entire flight the temperature was COLD! Otherwise the crew was great!

6.0 GoodAnonymous, Oct 2025BOS - AMS
Read more JetBlue reviews

Checking In on JetBlue site was impossible. It hung up on REAL ID. Even my Global Entry did not help. Luckily, on Kayak site it was a breeze. Entire flight the temperature was COLD! Otherwise the crew was great!

The flight was two hours late due to a computer fault and resulting maintenance. Nothing was offered as compensation beyond bottles of water during the time we were deplaned and waiting in the terminal.

Very pleasant flight attendants. Gate crew rather loud chatting with each other.

Four plus hour flight delay in New York caused us to take off after 11:30pm. We didn’t arrive at our hotel until five hours after check in. Started the trip off feeling exhausted.

Plane was in bad shape. TV’s and WiFi didn’t work. Plane need a refresh. Not enough room for bags.

There was a fowl odour coming from the lavatory the entire flight

Everything was great. I liked the text updates so that I never miss a gate change & I have all the latest info.

I don’t usually fly budget airlines or airlines in the United States. It was as good as any other airline. The seats are comfortable and the airline attendants are not rude & surly. Very nice flight (s).

No internet on a flight over three hours in this age is criminal. Staff inattentive and dismissive

They have the most inexperienced / rude flight staff I’ve encountered

Terrible. Flight cancelled with no reasoning and no flights to rebook. Employees were useless and did nothing to help. Did not even know where to retrieve luggage from the cancelled flight. Flyers beware.

No fault of Frontier staff: plane was very late, reached Orlando at 1 am, took a while to get luggage. Weather, gov financial shutdown impact on TSA, air controllers seemed to have multiple flights backed up. Frontier staff seemed to cope as gracefully as possible. It did reassure me that I and my new hip could adapt to travel challenges. Food/entertainment were irrelevant to my trip.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

Boarding was on time and plane departed as scheduled. There are obviously no amenities (food, drink, entertainment) on Frontier, but there also didn't seem to be any issues with luggage space either.

Inbound plane was on time and flight departed on time with no issues while boarding.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

i was unable to check in the flight. refund requested

It was well done. It was my first time flying with them and I was nervous b/c I have heard of many cancelled and/or delray flights. Everything went smoothly.

Just know that everything, and I mean everything is “ala cart”. 60$ just to put something in the overhead bin. I will never fly Frontier again nor do I recommend them to anyone else.

The single worst check in experience I could imagine. I’ll never do any business with Frontier or any affiliated company

Everything you need to know for your flight from Boston to Isla Grande

Information on your arrival and departure airports

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