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Flights from Islip to Austin

Find the cheapest flight options from Islip to Austin over the next three months. Book one-way tickets from CAD 124 and round-trip tickets from CAD 232.

      • ISP 20:46
        20h 18m
        1 stop
        AUS 16:04
        Islip - Austin | Thu, Jan 8 | Frontier Airlines
        AUS 16:59
        28h 47m
        1 stop
        ISP 22:46
        Austin - Islip | Mon, Jan 12 | Spirit Airlines
        CAD 232 CAD 1,199
        81% OFF
        81% OFF
        CAD 1,199 CAD 232
      • ISP 17:27
        29h 30m
        1 stop
        AUS 21:57
        Islip - Austin | Wed, Dec 24 | Frontier Airlines
        AUS 06:00
        12h 40m
        1 stop
        ISP 19:40
        Austin - Islip | Mon, Dec 29 | Spirit Airlines
        CAD 416 CAD 1,199
        65% OFF
        65% OFF
        CAD 1,199 CAD 416
      • ISP 16:40
        9h 18m
        1 stop
        AUS 00:58
        Islip - Austin | Sat, Dec 20 | Frontier Airlines
        AUS 05:30
        18h 25m
        1 stop
        ISP 00:55
        Austin - Islip | Sat, Dec 27 | Spirit Airlines
        CAD 459 CAD 1,199
        62% OFF
        62% OFF
        CAD 1,199 CAD 459
      • ISP 19:56
        21h 51m
        1 stop
        AUS 16:47
        Islip - Austin | Sat, Jan 10 | Frontier Airlines
        AUS 18:02
        27h 44m
        1 stop
        ISP 22:46
        Austin - Islip | Mon, Jan 12 | Frontier Airlines
        CAD 502
        57% OFF
        CAD 1,199 CAD 502
      • ISP 16:40
        9h 18m
        1 stop
        AUS 00:58
        Islip - Austin | Fri, Dec 19 | Frontier Airlines
        AUS 05:30
        18h 25m
        1 stop
        ISP 00:55
        Austin - Islip | Sat, Dec 27 | Spirit Airlines
        CAD 518
        56% OFF
        CAD 1,199 CAD 518
      • ISP 11:50
        11h 18m
        1 stop
        AUS 22:08
        Islip - Austin | Wed, Dec 17 | Jetblue Airways
        AUS 06:10
        11h 35m
        1 stop
        ISP 18:45
        Austin - Islip | Thu, Dec 25 | Jetblue Airways
        CAD 871
        27% OFF
        CAD 1,199 CAD 871
      • ISP 12:25
        10h 51m
        1 stop
        AUS 22:16
        Islip - Austin | Sun, Jan 18 | Jetblue Airways
        AUS 06:00
        28h 35m
        1 stop
        ISP 11:35
        Austin - Islip | Thu, Jan 22 | Jetblue Airways
        CAD 880
        27% OFF
        CAD 1,199 CAD 880
      • ISP 12:25
        10h 51m
        1 stop
        AUS 22:16
        Islip - Austin | Thu, Jan 29 | Jetblue Airways
        AUS 06:00
        28h 35m
        1 stop
        ISP 11:35
        Austin - Islip | Sun, Feb 1 | Jetblue Airways
        CAD 905
        25% OFF
        CAD 1,199 CAD 905
      • ISP 07:30
        30h 5m
        1 stop
        AUS 12:35
        Islip - Austin | Sun, Jan 18 | Cape Air
        AUS 06:00
        28h 35m
        1 stop
        ISP 11:35
        Austin - Islip | Thu, Jan 22 | Jetblue Airways
        CAD 914
        24% OFF
        CAD 1,199 CAD 914
      • ISP 09:59
        14h 21m
        1 stop
        AUS 23:20
        Islip - Austin | Fri, Dec 12 | Cape Air
        AUS 07:25
        7h 45m
        1 stop
        ISP 16:10
        Austin - Islip | Sun, Dec 14 | Delta Air Lines
        CAD 1,079
        10% OFF
        CAD 1,199 CAD 1,079
      • ISP 13:00
        17h 25m
        1 stop
        AUS Invalid Date
        Islip - Austin | Sat, Dec 13 | Normal Airline
        AUS 15:00
        6h
        Direct
        ISP 16:00
        Austin - Islip | Mon, Dec 15 | Normal Airline
        Find More Flights
        Find More Flights
      • ISP 19:43
        21h 21m
        1 stop
        AUS 16:04
        Islip - Austin | Mon, Jan 26 | Frontier Airlines
        CAD 124 CAD 270
        54% OFF
        54% OFF
        CAD 270 CAD 124
      • ISP 20:55
        14h 26m
        1 stop
        AUS 10:21
        Islip - Austin | Fri, Jan 23 | Frontier Airlines
        CAD 152 CAD 270
        44% OFF
        44% OFF
        CAD 270 CAD 152
      • ISP 09:52
        9h 42m
        1 stop
        AUS 18:34
        Islip - Austin | Thu, Jan 15 | Frontier Airlines
        CAD 175 CAD 270
        35% OFF
        35% OFF
        CAD 270 CAD 175
      • ISP 08:00
        9h 4m
        1 stop
        AUS 16:04
        Islip - Austin | Wed, Jan 14 | Frontier Airlines
        CAD 176
        35% OFF
        CAD 270 CAD 176
      • ISP 12:25
        10h 10m
        1 stop
        AUS 21:35
        Islip - Austin | Mon, Jan 26 | Jetblue Airways
        CAD 187
        31% OFF
        CAD 270 CAD 187
      • ISP 16:40
        9h 18m
        1 stop
        AUS 00:58
        Islip - Austin | Sat, Dec 20 | Frontier Airlines
        CAD 201
        26% OFF
        CAD 270 CAD 201
      • ISP 16:40
        22h 28m
        1 stop
        AUS 14:08
        Islip - Austin | Wed, Dec 31 | Frontier Airlines
        CAD 203
        25% OFF
        CAD 270 CAD 203
      • ISP 12:25
        10h 10m
        1 stop
        AUS 21:35
        Islip - Austin | Wed, Jan 14 | Jetblue Airways
        CAD 205
        24% OFF
        CAD 270 CAD 205
      • ISP 09:25
        10h 6m
        1 stop
        AUS 18:31
        Islip - Austin | Sun, Feb 1 | Frontier Airlines
        CAD 230
        15% OFF
        CAD 270 CAD 230
      • ISP 12:25
        10h 10m
        1 stop
        AUS 21:35
        Islip - Austin | Thu, Jan 15 | Jetblue Airways
        CAD 243
        10% OFF
        CAD 270 CAD 243
      • ISP 13:00
        17h 25m
        1 stop
        AUS Invalid Date
        Islip - Austin | Sat, Dec 13 | Normal Airline
        Find More Flights
        Find More Flights

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

Flight details for Islip to Austin

The distance between Islip and Austin is 2,507.39 km. Based on Trip.com's data, travel demand peaks in December. The off-season for travel is September.

Cheapest one-way flight priceCAD 124
Cheapest round-trip ticket priceCAD 232
Off-season for travelSeptember
Peak season for travelDecember
Flight distance2,507.39 km

Find the best time to fly from Islip to Austin

The cheapest time for Islip to Austin flights: Jan 25 to Feb 1 — one way flight prices from CAD 124.

Cheapest flights
From price
Search
  • 714
  • 1421
  • 2128

  • Jan

    284
  • 411
  • 1118
  • 1825

  • Feb

    251
  • 18
  • 815
  • 1522

  • Mar

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

Flight FAQs

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

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as CAD 124 on Cheapest nonstop routes (e.g. ISP to AUS on Mon, Jan 26), while Frontier Airlines offers Cheapest nonstop round-trips from CAD 232 departing on Thu, Jan 8 and returning on Mon, Jan 12.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Islip to Austin 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 Islip to Austin, 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 Mon, Jan 26, with one-way flights priced at just CAD 124.
    · 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 Austin travel is around December.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Islip to Austin is September, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Islip to Austin on December 24, 2025 with Frontier Airlines, with prices starting at CAD 415.
  • The time difference between Austin and Islip 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.