Southwest® flights from Denver to Long Island/Islip MacArthur from $185

Promo Code

Low fares from Denver to Long Island/Islip MacArthur

$

Denver (DEN)to

Long Island/Islip MacArthur (ISP)
Depart: 11/12/2026

One-way

Basic

From
$185
Seen: 19 hrs ago

Denver (DEN)to

Long Island/Islip MacArthur (ISP)
Depart: 11/11/2026

One-way

Basic

From
$185
Seen: 14 hrs ago

Denver (DEN)to

Long Island/Islip MacArthur (ISP)
Depart: 12/10/2026

One-way

Basic

From
$185
Seen: 2 hrs ago

Denver (DEN)to

Long Island/Islip MacArthur (ISP)
Depart: 11/16/2026

One-way

Basic

From
$185
Seen: 2 hrs ago

Denver (DEN)to

Long Island/Islip MacArthur (ISP)
Depart: 10/30/2026

One-way

Basic

From
$195
Seen: 17 hrs ago

Denver (DEN)to

Long Island/Islip MacArthur (ISP)
Depart: 12/04/2026

One-way

Basic

From
$195
Seen: 14 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Denver to Long Island/Islip MacArthur

Sep 2026
From$275*
Seen: 14 hrs ago
One Way/Basic
Oct 2026
From$195*
Seen: 17 hrs ago
One Way/Basic
Nov 2026
From$185*
Seen: 2 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $275
Displaying fares for September-2026
  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    10

    Thu

    SEP

  • DEN–ISP, 09/11/2026: From $589
    11

    Fri

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    12

    Sat

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    13

    Sun

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

    Mon

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    15

    Tue

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    16

    Wed

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

    Thu

  • DEN–ISP, 09/18/2026: From $494
    18

    Fri

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    19

    Sat

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    20

    Sun

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    21

    Mon

  • DEN–ISP, 09/22/2026: From $494
    22

    Tue

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    23

    Wed

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    24

    Thu

  • DEN–ISP, 09/25/2026: From $304
    25

    Fri

  • DEN–ISP, 09/26/2026: From $299
    26

    Sat

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    27

    Sun

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    28

    Mon

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    29

    Tue

  • DEN–ISP, 09/30/2026: From $275
    30

    Wed

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    01

    Thu

    OCT

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    02

    Fri

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    03

    Sat

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    04

    Sun

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    05

    Mon

  • DEN–ISP: cmp-view-offers-disclaimer. Find Offers
    06

    Tue

  • DEN–ISP, 10/07/2026: From $275
    07

    Wed

  • DEN–ISP, 10/08/2026: From $304
    08

    Thu

  • DEN–ISP, 10/09/2026: From $331
    09

    Fri

    • Range$275-$589

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    Denver International Airport
    Arriving at:
    Long Island MacArthur Airport
    Distance:
    1659 miles

    Route Information

    73† Weekly flights

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    Questions we hear the most

    There are 73 weekly flights from Denver to Long Island/Islip MacArthur on Southwest Airlines.
    To find the lowest fares by day and time to fly Denver to Long Island/Islip MacArthur with Southwest, check out our Low Fare Calendar.
    You can rent a car at Long Island MacArthur Airport book yours with your flight.
    Yes! Flights from Denver to Long Island/Islip MacArthur—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

    Explore Flights from Other Popular Origins

    Popular Flights from Denver