BOS - ISP

$199 Find Cheap Flights from Boston to Islip - Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$397
Typical prices: $531-$674
Southwest
Wed 12/19Fri 1/5
BOS - ISP • 1 stop
Cheapest one-way
$199
Typical prices: $260-$350
Southwest
Mon 12/31
BOS - ISP • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Boston and Islip. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
December
Cheapest • 21% price drop
July
Most popular
Good to know
+1
Good to know
+1
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Flight Deals

Cheap Flights from Boston to Islip (BOS-ISP)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Islip

Sat, Dec 19 - Tue, Jan 5
Southwest Logo
5:15 pm - 11:45 pmBOS  Boston Logan Intl-ISP Islip Long Island
6h 30m1 stop Baltimore/Washington
Southwest Logo
6:05 am - 12:20 pmISP  Islip Long Island-BOS Boston Logan Intl
6h 15m1 stop Baltimore/Washington
$397Southwest
Sat, Dec 19 - Sun, Dec 20
Southwest Logo
5:15 pm - 11:45 pmBOS  Boston Logan Intl-ISP Islip Long Island
6h 30m1 stop Baltimore/Washington
Southwest Logo
4:55 pm - 10:55 pmISP  Islip Long Island-BOS Boston Logan Intl
6h 00m1 stop Baltimore/Washington
$397Southwest
Wed, Dec 2 - Thu, Dec 3
Southwest Logo
5:30 am - 11:45 amBOS  Boston Logan Intl-ISP Islip Long Island
6h 15m1 stop Baltimore/Washington
Southwest Logo
4:05 pm - 9:55 pmISP  Islip Long Island-BOS Boston Logan Intl
5h 50m1 stop Baltimore/Washington
$397Southwest
Sat, Dec 19 - Sun, Dec 20
Southwest Logo
5:15 pm - 11:45 pmBOS  Boston Logan Intl-ISP Islip Long Island
6h 30m1 stop Baltimore/Washington
Southwest Logo
4:55 pm - 12:40 amISP  Islip Long Island-BOS Boston Logan Intl
7h 45m2 stops Baltimore/Washington Nashville Intl
$402Southwest
Wed, Dec 2 - Thu, Dec 3
Southwest Logo
10:35 am - 9:45 pmBOS  Boston Logan Intl-ISP Islip Long Island
11h 10m2 stops Nashville Intl Baltimore/Washington
Southwest Logo
4:05 pm - 9:55 pmISP  Islip Long Island-BOS Boston Logan Intl
5h 50m1 stop Baltimore/Washington
$402Southwest
Sat, Dec 19 - Tue, Jan 5
Southwest Logo
5:15 pm - 11:45 pmBOS  Boston Logan Intl-ISP Islip Long Island
6h 30m1 stop Baltimore/Washington
Southwest Logo
12:30 pm - 10:15 pmISP  Islip Long Island-BOS Boston Logan Intl
9h 45m2 stops Baltimore/Washington Nashville Intl
$422Southwest
Wed, Dec 2 - Thu, Dec 3
Southwest Logo
10:35 am - 9:45 pmBOS  Boston Logan Intl-ISP Islip Long Island
11h 10m2 stops Nashville Intl Baltimore/Washington
Southwest Logo
12:30 pm - 10:15 pmISP  Islip Long Island-BOS Boston Logan Intl
9h 45m2 stops Baltimore/Washington Nashville Intl
$427Southwest
Sat, Dec 19 - Sun, Dec 20
Southwest Logo
3:00 pm - 12:05 amBOS  Boston Logan Intl-ISP Islip Long Island
9h 05m2 stops Baltimore/Washington Orlando
Southwest Logo
4:55 pm - 12:40 amISP  Islip Long Island-BOS Boston Logan Intl
7h 45m2 stops Baltimore/Washington Nashville Intl
$476Southwest
Thu, Dec 24 - Sat, Dec 26
Southwest Logo
5:30 pm - 9:45 pmBOS  Boston Logan Intl-ISP Islip Long Island
4h 15m1 stop Baltimore/Washington
Southwest Logo
5:30 am - 9:40 amISP  Islip Long Island-BOS Boston Logan Intl
4h 10m1 stop Baltimore/Washington
$496Southwest
Sat, Dec 19 - Tue, Jan 5
Southwest Logo
3:00 pm - 12:05 amBOS  Boston Logan Intl-ISP Islip Long Island
9h 05m2 stops Baltimore/Washington Orlando
Southwest Logo
12:30 pm - 10:15 pmISP  Islip Long Island-BOS Boston Logan Intl
9h 45m2 stops Baltimore/Washington Nashville Intl
$496Southwest
Booking Insights

Price, demand and travel trends for Boston to Islip flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Boston to Islip?

Round-trip flights from Boston to Islip typically range from $531 to $674. The lowest price found in the past 5 days was $397, on Southwest.

What's the cheapest day of the week to fly from Boston to Islip?

Based on deals KAYAK users found in the last 12 months, Sunday is the cheapest day of the week to fly from Boston to Islip. It’s 18% cheaper than the average day, while Tuesday is the most expensive, with prices 2% higher.

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Key details for Boston to Islip flights

Low season

April

Cheapest flight

$199
Beat the crowds with an average 63% drop in travelers.
The most popular month to fly with an average 71% increase in travelers.
One-way flight from Boston to Islip

When to book flights from Boston to Islip

Are your dates flexible? Find out the best times to travel from Boston to Islip based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Boston to Islip flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What are the earliest and latest flights from Boston to Islip?

    These are the earliest and latest flight times available from Boston to Islip:

    • Earliest: departs at 9:39 am and lands at 11:09 am
    • Latest: departs at 6:19 pm and lands at 7:49 pm.

    The flight takes about 1h 30m.

  • What cabin classes can I book on flights from Boston to Islip?

    Only Economy Class is available on flights from Boston to Islip.

  • How long is a flight from Boston to Islip?

    A nonstop flight from Boston to Islip takes 1h 30m, covering 153 miles.

  • Do I need a passport to fly from Boston to Islip?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a Boston to Islip flight?

    Round-trip flights from Boston to Islip range from $531 to $674, with an average of $670 over the past 12 months. Anything below $531 counts as a good deal.

  • How much can I save by taking a layover when flying from Boston to Islip?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $563 round-trip via Baltimore/Washington (BWI), compared to $670 for nonstop.

  • Which aircraft model is used most often on flights from Boston to Islip?

    The Tecnam P2012 Traveler family is used most often on this route, operated mainly by Cape Air. Other aircraft seen on the route include Boeing 737-900 variants.

  • Have flight prices from Boston to Islip changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $397 to $3,158. That means the highest observed fare was about 8x higher than the lowest one.

  • How are flight prices from Boston to Islip looking right now?

    One-way fares from Boston to Islip are currently lower than usual. Average one-way flight prices are about $219, which is 31% below the typical average for this route.

  • What car rental options are available at Islip Long Island Airport (ISP)?

    Islip Long Island Airport (ISP) hosts 5 major car rental companies, with daily rates averaging $105 for economy cars. Top options include:

    • Budget
    • Enterprise Rent-A-Car
    • Avis
    • National
    • Empire Rent A Car

  • Which airports can I use when flying from Boston to Islip?

    Flights from Boston to Islip usually depart from Boston Logan Intl (BOS) and arrive at Islip Long Island (ISP).

  • Which airports do connecting flights from Boston to Islip pass through?

    Most connecting flights from Boston to Islip pass through Baltimore/Washington (BWI), which handles 100% of one-stop traffic on this route.

  • Can I save money by using flexible dates for flights from Boston to Islip?

    Yes. Flexible dates can save you up to 20% on flights from Boston to Islip. Sunday is the cheapest departure day at $553 round-trip on average, while Tuesday is the most expensive at $689, a difference of $136.

    Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • What airlines fly from Boston to Islip?

    Only Cape Air operates flights between Boston and Islip.

  • Which airlines include bags at no extra cost on Boston to Islip flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Cape Air: a cabin bag in Economy Class class

    Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

Your guide to booking Boston to Islip flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Sunday departure and avoid flying on Tuesday. On this route, Sunday flights average $553, about $136 less than Tuesday fares (20% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Boston to Islip trip for December. Fares historically average $531 round-trip in that month - typically $199 less than the most expensive month, which is June (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Baltimore/Washington Airport (BWI) can be cheaper than flying direct. The cheapest layover option averages $563 round-trip on this route - about $107 less than direct flights (based on the last 12 months).

More options for your flight from Boston to Islip

Complete your trip to Islip with a hotel stay or car rental

Car rentals in Islip
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