$136 Cheap Flights from Islip (ISP) to Milwaukee (MKE)

View $136 flight on Mon, Jan 5, 2026Opens in a new window

Popular airlines from MacArthur Airport (ISP) to General Mitchell Intl. Airport (MKE)

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Cheap Flights from Islip to Milwaukee (ISP-MKE)

Prices were available within the past 7 days and start at $136 for one-way flights and $282 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Fri, Feb 27 - Sat, Feb 28
ISP
Islip
MKE
Milwaukee
$282 Roundtrip, found 11 hours ago
$282
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Fri, Feb 27 from Islip to Milwaukee, returning Sat, Feb 28, priced at $282 found 11 hours ago
Southwest Airlines
Fri, Feb 27 - Sat, Feb 28
ISP
Islip
MKE
Milwaukee
$297 Roundtrip, found 11 hours ago
$297
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Fri, Feb 27 from Islip to Milwaukee, returning Sat, Feb 28, priced at $297 found 11 hours ago
Southwest Airlines
Fri, Feb 27 - Sat, Feb 28
ISP
Islip
MKE
Milwaukee
$302 Roundtrip, found 11 hours ago
$302
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Fri, Feb 27 from Islip to Milwaukee, returning Sat, Feb 28, priced at $302 found 11 hours ago
Southwest Airlines
Fri, Feb 27 - Sat, Feb 28
ISP
Islip
MKE
Milwaukee
$308 Roundtrip, found 11 hours ago
$308
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Fri, Feb 27 from Islip to Milwaukee, returning Sat, Feb 28, priced at $308 found 11 hours ago
Southwest Airlines
Fri, Feb 27 - Sat, Feb 28
ISP
Islip
MKE
Milwaukee
$314 Roundtrip, found 11 hours ago
$314
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Fri, Feb 27 from Islip to Milwaukee, returning Sat, Feb 28, priced at $314 found 11 hours ago
Southwest Airlines
Fri, Feb 27 - Sat, Feb 28
ISP
Islip
MKE
Milwaukee
$323 Roundtrip, found 11 hours ago
$323
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Fri, Feb 27 from Islip to Milwaukee, returning Sat, Feb 28, priced at $323 found 11 hours ago
Southwest Airlines
Fri, Feb 27 - Sat, Feb 28
ISP
Islip
MKE
Milwaukee
$325 Roundtrip, found 11 hours ago
$325
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Fri, Feb 27 from Islip to Milwaukee, returning Sat, Feb 28, priced at $325 found 11 hours ago
Southwest Airlines
Fri, Feb 27 - Sat, Feb 28
ISP
Islip
MKE
Milwaukee
$328 Roundtrip, found 11 hours ago
$328
Roundtrip
found 11 hours ago
Select Southwest Airlines flight, departing Fri, Feb 27 from Islip to Milwaukee, returning Sat, Feb 28, priced at $328 found 11 hours ago
Southwest Airlines
Wed, Jul 1 - Tue, Jul 7
ISP
Islip
MKE
Milwaukee
$333 Roundtrip, found 22 hours ago
$333
Roundtrip
found 22 hours ago
Select Southwest Airlines flight, departing Wed, Jul 1 from Islip to Milwaukee, returning Tue, Jul 7, priced at $333 found 22 hours ago
Frontier Airlines
Tue, Dec 30 - Wed, Jan 7
ISP
Islip
MKE
Milwaukee
$600 Roundtrip, found 1 day ago
$600
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Dec 30 from Islip to Milwaukee, returning Wed, Jan 7, priced at $600 found 1 day ago

Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to General Mitchell Intl. Airport (MKE) cost?
Secure a cheap one-way flight from $136 or cheap return flight from $282 from MacArthur Airport (ISP) to General Mitchell Intl. Airport (MKE) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from MacArthur Airport (ISP) to General Mitchell Intl. Airport (MKE)?
The cheapest month to fly from ISP to MKE is February, when there's less demand. Off-peak season is usually when airlines offer lower prices between these airports.
Which airlines fly direct from MacArthur Airport (ISP) to General Mitchell Intl. Airport (MKE)?
There are no direct routes from Islip, NY (ISP-MacArthur) to General Mitchell Intl. Airport (MKE). However, there are other airports that have nonstop flights. Begin your journey at John F. Kennedy Intl. Airport (JFK) and fly straight to Milwaukee without layovers.
What is the cheapest airline that flies from MacArthur Airport (ISP) to General Mitchell Intl. Airport (MKE)?
To find the cheapest airline that'll fly you from ISP to MKE, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from MacArthur Airport (ISP) to General Mitchell Intl. Airport (MKE)?
There are no daily nonstop flights available from MacArthur Airport (ISP) to General Mitchell Intl. Airport (MKE). But you can choose flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be on your way before you know it.
What day of the week has the most flights from ISP to MKE?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from MacArthur Airport (ISP) to General Mitchell Intl. Airport (MKE)?
To arrive at General Mitchell Intl. Airport (MKE) without delays, opt for a flight that leaves MacArthur Airport (ISP) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from MacArthur Airport (ISP) to General Mitchell Intl. Airport (MKE) last-minute?
Last-minute fares from ISP to MKE are usually more expensive. To lock in the best prices, start looking for flights early. That being said, if you're flexible with your travel plans, you may land a cheap fare right before your trip.
Is it cheaper to book an ISP to MKE flight and hotel package?
Compared with arranging flights and hotels separately, booking an ISP to MKE flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one easy place takes the hassle out of planning your trip. Just secure your flights and select from our extensive range of stays, then personalize your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to General Mitchell Intl. Airport (MKE)?
If you booked your ISP to MKE flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal for more information.

Travel information

Origin airport
MacArthur
Destination airport
General Mitchell Intl.
Airlines serving
Southwest Airlines
Roundtrip price
$281
Distance
775 mi

Book with confidence

Islip to Milwaukee Flights

The cheapest times to fly from Islip to Milwaukee

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Islip to Milwaukee are during the month of February. You can find some of the cheapest flights from Islip to Milwaukee with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Islip to Milwaukee

Sunday is one of the best days to book for cheap flights from Islip to Milwaukee: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Islip to Milwaukee

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Islip to Milwaukee in 2025. You can also book with separate airlines for your outbound and return journeys, from $136 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Islip to Milwaukee flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Islip to Milwaukee airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Islip to Milwaukee Flights

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