$113+ Cheap flights from Islip, NY (ISP) to Wisconsin
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — MKE
Nov 5 — Nov 121
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Islip to Wisconsin with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to Wisconsin
Cheapest
Best
Last-minute
One-way
Cheapest flights from Islip to WisconsinExplore the most affordable flight options available from Islip to Wisconsin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 6, 2026.
Explore the most affordable flight options available from Islip to Wisconsin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 6, 2026.
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:00 am -
1 stop5h 40m
Tue 11/36:20 am -
2 stops8h 55m
Deal found 10/1![Southwest logo]()
$274
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/115:40 pm -
1 stop6h 50m
Mon 12/145:45 am -
2 stops9h 30m
Deal found 10/1![Southwest logo]()
$284
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/185:35 am -
1 stop7h 40m
Mon 1/185:00 am -
1 stop6h 00m
Deal found 10/5![Southwest logo]()
$348
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:40 pm -
1 stop7h 10m
Tue 10/202:30 pm -
1 stop4h 30m
Deal found 10/1![Southwest logo]()
$490
This Southwest deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:05 am -
1 stop6h 50m
Thu 12/34:35 pm -
1 stop4h 10m
Deal found 10/4![Southwest logo]()
$636
Best flights from Islip to WisconsinDiscover carefully curated flight deals from Islip to Wisconsin that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 6, 2026.
Discover carefully curated flight deals from Islip to Wisconsin that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 6, 2026.
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:00 am -
1 stop5h 40m
Tue 11/36:20 am -
2 stops8h 55m
Deal found 10/1![Southwest logo]()
$274
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/115:40 pm -
1 stop6h 50m
Mon 12/145:45 am -
2 stops9h 30m
Deal found 10/1![Southwest logo]()
$284
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/185:35 am -
1 stop7h 40m
Mon 1/185:00 am -
1 stop6h 00m
Deal found 10/5![Southwest logo]()
$348
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1611:00 am -
2 stops7h 50m
Tue 10/202:30 pm -
1 stop4h 30m
Deal found 10/1![Southwest logo]()
$518
Last-minute flights from Islip to WisconsinDiscover last-minute flight deals from Islip to Wisconsin. Data last updated October 6, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to Wisconsin. Data last updated October 6, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 10/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:05 am -
1 stop6h 50m
Thu 12/34:35 pm -
1 stop4h 10m
Deal found 10/4![Southwest logo]()
$636
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:40 pm -
1 stop7h 10m
Tue 10/202:30 pm -
1 stop4h 30m
Deal found 10/1![Southwest logo]()
$490
This Southwest deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/316:00 am -
1 stop5h 40m
Tue 11/36:20 am -
2 stops8h 55m
Deal found 10/1![Southwest logo]()
$274
One-way flights from Islip to WisconsinSearch for one-way flight options from Islip to Wisconsin. Find affordable one-way fares based on user searches. Data last updated October 6, 2026.
Search for one-way flight options from Islip to Wisconsin. Find affordable one-way fares based on user searches. Data last updated October 6, 2026.
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/143:30 pm -
1 stop7h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Southwest logo]()
$113
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1312:25 pm -
1 stop5h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Southwest logo]()
$142
This Southwest deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:40 pm -
1 stop7h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Southwest logo]()
$221
This Kiwi.com deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/239:33 pm -
3 stops36h 47m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Multiple Airlines logo]()
$456
Find flight deals from Islip to Wisconsin
Keep the following information in mind while searching for Islip to Wisconsin flight deals. Data was last updated October 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $274 (Southwest) |
One-way from | $113 (Southwest) |
Popular in | December |
Cheapest in | January |
Average price | $465 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to Wisconsin that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 6, 2026.
Use the filters below to find and compare flights from Islip to Wisconsin that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
IslipMilwaukee
ISP Islip Long Island - MKE Milwaukee-Mitchell
ISPMKE
Islip Long Island
Fri 11/13
12:25 pm-5:15 pm
1 stop5h 50m
Milwaukee-Mitchell
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$142
IslipMilwaukee
ISP Islip Long Island - MKE Milwaukee-Mitchell
ISPMKE
Islip Long Island
Fri 10/23
5:40 pm-11:50 pm
1 stop7h 10m
Milwaukee-Mitchell
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$221
IslipMilwaukee
ISP Islip Long Island - MKE Milwaukee-Mitchell
ISPMKE
Islip Long Island
Sat 10/31
6:00 am-10:40 am
1 stop5h 40m
Milwaukee-Mitchell
Tue 11/3
6:20 am-4:15 pm
2 stops8h 55m
$274
IslipMilwaukee
ISP Islip Long Island - MKE Milwaukee-Mitchell
ISPMKE
Islip Long Island
Fri 12/11
5:40 pm-11:30 pm
1 stop6h 50m
Milwaukee-Mitchell
Mon 12/14
5:45 am-4:15 pm
2 stops9h 30m
$284
IslipMilwaukee
ISP Islip Long Island - MKE Milwaukee-Mitchell
ISPMKE
Islip Long Island
Fri 12/18
5:35 am-12:15 pm
1 stop7h 40m
Milwaukee-Mitchell
Mon 1/18
5:00 am-12:00 pm
1 stop6h 00m
$348
IslipMilwaukee
ISP Islip Long Island - MKE Milwaukee-Mitchell
ISPMKE
Islip Long Island
Fri 10/23
9:33 pm-9:20 am
3 stops36h 47m
Milwaukee-Mitchell
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$456
IslipMilwaukee
ISP Islip Long Island - MKE Milwaukee-Mitchell
ISPMKE
Islip Long Island
Fri 10/16
11:00 am-5:50 pm
2 stops7h 50m
Milwaukee-Mitchell
Tue 10/20
2:30 pm-8:00 pm
1 stop4h 30m
$518
Sorted by cheapest first
Best time to book a flight from Islip to Wisconsin
Have a flexible travel schedule? Discover the best time to fly to Wisconsin from Islip with our price prediction graph.
ISP-MKE
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Islip to Wisconsin
ISP-USWI
ISP-MKE
No data available for this route at this time. Please check back soon.
Related info for your journey
Find useful and relevant information for your journey from Islip to Wisconsin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations