Islip, Long Island (ISP) to Nantucket (ACK) Flight Deals from $543!

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Cape Air Tickets for Upcoming Islip, Long Island (ISP) to Nantucket (ACK) Flights

Sep 2026
From$543*
Viewed: 1 day ago
Flight Type One Way/Economy
Oct 2026
From$543*
Viewed: 1 day ago
Flight Type One Way/Economy
Nov 2026
No result for this month.
cmp-daily-histogram-bars-legend-min-price-aria-label $543
Displaying fares for September-2026
  • ISP–ACK: cmp-view-offers-disclaimer. Find Offers
    13

    Su

    SEP

  • ISP–ACK: cmp-view-offers-disclaimer. Find Offers
    14

    Mo

  • ISP–ACK, 09/15/2026: From $703
    15

    Tu

  • ISP–ACK, 09/16/2026: From $703
    16

    We

  • ISP–ACK: cmp-view-offers-disclaimer. Find Offers
    17

    Th

  • ISP–ACK, 09/18/2026: From $643
    18

    Fr

  • ISP–ACK, 09/19/2026: From $673
    19

    Sa

  • ISP–ACK, 09/20/2026: From $543
    20

    Su

  • ISP–ACK, 09/21/2026: From $573
    21

    Mo

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    22

    Tu

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    23

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    24

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    25

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    26

    Sa

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    27

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    28

    Mo

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    29

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    30

    We

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    Th

    OCT

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    Fr

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    Fr

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    10

    Sa

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    11

    Su

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    12

    Mo

    • Range$543-$703

    *Prices have been viewed by other users searching within the last 48 hours for flights on this route, and may not be currently available. Additional baggage charges and fees may apply. Other terms and conditions may apply.

    Find Islip, Long Island to Nantucket plane ticket offers

    $
    Find Islip, Long Island to Nantucket plane ticket offers
    From
    To
    Fare Type
    Dates
    Price
    Islip, Long Island (ISP)Nantucket (ACK)One-way
    /
    Economy    		Depart: 09/20/2026

    Fares From

    $543

    Viewed: 1 day ago

    Islip, Long Island (ISP)Nantucket (ACK)One-way
    /
    Economy    		Depart: 10/23/2026

    Fares From

    $543

    Viewed: 1 day ago

    Islip, Long Island (ISP)Nantucket (ACK)One-way
    /
    Economy    		Depart: 09/21/2026

    Fares From

    $573

    Viewed: 1 day ago

    Islip, Long Island (ISP)Nantucket (ACK)One-way
    /
    Economy    		Depart: 10/27/2026

    Fares From

    $613

    Viewed: 1 day ago

    Islip, Long Island (ISP)Nantucket (ACK)One-way
    /
    Economy    		Depart: 10/26/2026

    Fares From

    $613

    Viewed: 1 day ago

    Islip, Long Island (ISP)Nantucket (ACK)One-way
    /
    Economy    		Depart: 10/28/2026

    Fares From

    $613

    Viewed: 1 day ago

    *Fares displayed have been collected within the last 48hrs and may no longer be available at time of booking.
    Islip, Long Island (ISP) to Nantucket (ACK) Flight Deals