$391+ Cheap flights from Islip, NY to Milwaukee (ISP - MKE)
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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — MKE
Dec 17 — Dec 241
1 adult, Economy
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Find cheap flights from Islip to Milwaukee 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 Milwaukee
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Milwaukee (MKE). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 17, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $391 (Southwest) |
Popular in | December |
Cheapest in | January |
Average price | $469 |
Find flight deals from Islip to Milwaukee
Cheapest flights from Islip to MilwaukeeExplore the most affordable flight options available from Islip to Milwaukee. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 17, 2025.
Explore the most affordable flight options available from Islip to Milwaukee. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 17, 2025.
This Southwest deal was found by Cheapflights users on 11/16. 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.
Thu 12/45:30 amISP - MKE
1 stop5h 00mSouthwest
Sat 12/62:10 pmMKE - ISP
1 stop6h 35mSouthwest
Deal found 11/16![Southwest logo]()
$391
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to Milwaukee 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 2,558,603 searches. Data last updated November 17, 2025.
Use the filters below to find and compare flights from Islip to Milwaukee that are best for you.
Fly from
Islip
Fly to
Milwaukee
Route
Depart
Return
Price
IslipMilwaukee
ISP - MKE
ISPMKE
Islip Long Island
Thu 12/4
5:30 am-9:30 am
1 stop5h 00m
Milwaukee-Mitchell
Sat 12/6
2:10 pm-9:45 pm
1 stop6h 35m
$391
Compare providers for flights from Islip to Milwaukee
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to Milwaukee in November.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Islip, New York-Milwaukee flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Islip, New York-Milwaukee flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Islip, New York-Milwaukee flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Islip, New York-Milwaukee flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Milwaukee flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Islip to Milwaukee
Have a flexible travel schedule? Discover the best time to fly to Milwaukee from Islip with our price prediction graph.
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 Milwaukee
What is the cheapest month to book a flight from Islip, New York to Milwaukee?
Currently, May is the cheapest month in which you can book a flight from Islip, New York to Milwaukee (average of $55). Flying from Islip, New York to Milwaukee in July is currently the most expensive (average of $126). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ISP to MKE?
Find hourly flight availability from Islip to Milwaukee. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 17, 2025.
One of the essential ways to save on airfare from Islip, New York to Milwaukee is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 49% on airfare.
Related info for your journey
Find useful and relevant information for your journey from Islip to Milwaukee. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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