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Flights from Austin to Islip

Find the cheapest flight options from Austin to Islip over the next three months. Book one-way tickets from DKK 609 and round-trip tickets from DKK 2,569.

      • AUS 06:00
        12h 40m
        1 stop
        ISP 19:40
        Austin - Islip | Fri, Dec 26 | Spirit Airlines
        ISP 12:20
        10h 37m
        1 stop
        AUS 21:57
        Islip - Austin | Thu, Jan 1 | Frontier Airlines
        DKK 2,569 DKK 8,146
        68% OFF
        68% OFF
        DKK 8,146 DKK 2,569
      • AUS 17:55
        16h 9m
        1 stop
        ISP 11:04
        Austin - Islip | Fri, Dec 26 | Delta Air Lines
        ISP 12:40
        22h 13m
        1 stop
        AUS 09:53
        Islip - Austin | Thu, Jan 1 | Cape Air
        DKK 5,078 DKK 8,146
        38% OFF
        38% OFF
        DKK 8,146 DKK 5,078
      • AUS 07:25
        7h 50m
        1 stop
        ISP 16:15
        Austin - Islip | Thu, Dec 18 | Delta Air Lines
        ISP 09:59
        24h 54m
        1 stop
        AUS 09:53
        Islip - Austin | Mon, Dec 22 | Cape Air
        DKK 5,747 DKK 8,146
        28% OFF
        28% OFF
        DKK 8,146 DKK 5,747
      • AUS 15:03
        26h 42m
        1 stop
        ISP 18:45
        Austin - Islip | Thu, Dec 18 | Jetblue Airways
        ISP 09:59
        25h 13m
        1 stop
        AUS 10:12
        Islip - Austin | Mon, Dec 22 | Cape Air
        DKK 5,842
        28% OFF
        DKK 8,146 DKK 5,842
      • AUS 15:03
        26h 52m
        1 stop
        ISP 18:55
        Austin - Islip | Fri, Dec 26 | Jetblue Airways
        ISP 19:40
        27h 49m
        1 stop
        AUS 22:29
        Islip - Austin | Thu, Jan 1 | Jetblue Airways
        DKK 6,116
        25% OFF
        DKK 8,146 DKK 6,116
      • AUS 17:55
        16h 10m
        1 stop
        ISP 11:05
        Austin - Islip | Sat, Dec 27 | Delta Air Lines
        ISP 12:30
        22h 23m
        1 stop
        AUS 09:53
        Islip - Austin | Wed, Dec 31 | Cape Air
        DKK 7,495
        8% OFF
        DKK 8,146 DKK 7,495
      • AUS 13:00
        17h 25m
        1 stop
        ISP Invalid Date
        Austin - Islip | Fri, Dec 19 | Normal Airline
        ISP 15:00
        6h
        Direct
        AUS 16:00
        Islip - Austin | Sun, Dec 21 | Normal Airline
        Find More Flights
        Find More Flights
      • AUS 11:16
        6h 32m
        1 stop
        ISP 18:48
        Austin - Islip | Thu, Jan 29 | Frontier Airlines
        DKK 609 DKK 2,479
        75% OFF
        75% OFF
        DKK 2,479 DKK 609
      • AUS 05:30
        18h 25m
        1 stop
        ISP 00:55
        Austin - Islip | Wed, Dec 24 | Spirit Airlines
        DKK 783 DKK 2,479
        68% OFF
        68% OFF
        DKK 2,479 DKK 783
      • AUS 05:30
        18h 25m
        1 stop
        ISP 00:55
        Austin - Islip | Fri, Dec 26 | Spirit Airlines
        DKK 800 DKK 2,479
        68% OFF
        68% OFF
        DKK 2,479 DKK 800
      • AUS 06:10
        17h 45m
        1 stop
        ISP 00:55
        Austin - Islip | Mon, Dec 22 | Jetblue Airways
        DKK 1,079
        56% OFF
        DKK 2,479 DKK 1,079
      • AUS 15:03
        8h 52m
        1 stop
        ISP 00:55
        Austin - Islip | Tue, Dec 23 | Jetblue Airways
        DKK 1,084
        56% OFF
        DKK 2,479 DKK 1,084
      • AUS 06:10
        17h 45m
        1 stop
        ISP 00:55
        Austin - Islip | Wed, Dec 24 | Jetblue Airways
        DKK 1,106
        55% OFF
        DKK 2,479 DKK 1,106
      • AUS 06:00
        28h 33m
        1 stop
        ISP 11:33
        Austin - Islip | Thu, Jan 29 | Jetblue Airways
        DKK 1,208
        51% OFF
        DKK 2,479 DKK 1,208
      • AUS 06:20
        12h 30m
        1 stop
        ISP 19:50
        Austin - Islip | Wed, Dec 17 | Jetblue Airways
        DKK 1,294
        48% OFF
        DKK 2,479 DKK 1,294
      • AUS 15:00
        8h 55m
        1 stop
        ISP 00:55
        Austin - Islip | Mon, Dec 29 | Jetblue Airways
        DKK 1,302
        47% OFF
        DKK 2,479 DKK 1,302
      • AUS 05:30
        18h 25m
        1 stop
        ISP 00:55
        Austin - Islip | Tue, Dec 23 | Spirit Airlines
        DKK 2,280
        8% OFF
        DKK 2,479 DKK 2,280
      • AUS 13:00
        17h 25m
        1 stop
        ISP Invalid Date
        Austin - Islip | Fri, Dec 19 | Normal Airline
        Find More Flights
        Find More Flights

Displayed flight fares from Austin to Islip are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for Austin to Islip

The distance between Austin and Islip is 2,507.39 km. It takes around 5 hours on average to fly from Austin to Islip. Based on Trip.com's data, travel demand peaks in July. The off-season for travel is September.

Cheapest one-way flight priceDKK 609
Cheapest round-trip ticket priceDKK 2,569
Off-season for travelSeptember
Peak season for travelJuly
Flight distance2,507.39 km
Average flight time5 hours
Flight statistics for the Austin–Islip route are based on aggregated booking data from Trip.com over the past 12 months.

Find the best time to fly from Austin to Islip

The cheapest time for Austin to Islip flights: Jan 25 to Feb 1 — one way flight prices from DKK 609.

Cheapest flights
From price
Search
  • 1421
  • 2128

  • Jan

    284
  • 411
  • 1118
  • 1825

  • Feb

    251
  • 18
  • 815
  • 1522

  • Mar

    221
  • 18
Displayed fare trends are based on Trip.com's aggregated average of the lowest flight prices from Austin to Islip, calculated over the upcoming 10 weeks.

Flight FAQs

  • What are the cheapest flights from Austin to Islip (AUS-ISP)?

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as DKK 609 on Cheapest nonstop routes (e.g. AUS to ISP on Thu, Jan 29), while Spirit Airlines offers Cheapest nonstop round-trips from DKK 2,569 departing on Fri, Dec 26 and returning on Thu, Jan 1.
  • It takes around 5 hours to fly from Austin (AUS) to Islip (ISP).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Austin to Islip is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Austin to Islip, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Thu, Jan 29, with one-way flights priced at just DKK 609.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Islip travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Austin to Islip is September, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Austin to Islip on December 26, 2025 with Spirit Airlines, with prices starting at DKK 2,568.
  • The time difference between Islip and Austin is 1h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.