$114 Cheap Flights from Milwaukee (MKE) to Islip (ISP)

View $114 flight on Tue, Nov 11, 2025Opens in a new window

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

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Cheap Flights from Milwaukee to Islip (MKE-ISP)

Prices were available within the past 7 days and start at $114 for one-way flights and $250 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Fri, Sep 26 - Mon, Sep 29
MKE
Milwaukee
ISP
Islip
$250 Roundtrip, found 6 days ago
$250
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Fri, Sep 26 from Milwaukee to Islip, returning Mon, Sep 29, priced at $250 found 6 days ago
Southwest Airlines
Fri, Sep 26 - Sun, Sep 28
MKE
Milwaukee
ISP
Islip
$268 Roundtrip, found 22 hours ago
$268
Roundtrip
found 22 hours ago
Select Southwest Airlines flight, departing Fri, Sep 26 from Milwaukee to Islip, returning Sun, Sep 28, priced at $268 found 22 hours ago
Southwest Airlines
Fri, Sep 26 - Sun, Sep 28
MKE
Milwaukee
ISP
Islip
$273 Roundtrip, found 22 hours ago
$273
Roundtrip
found 22 hours ago
Select Southwest Airlines flight, departing Fri, Sep 26 from Milwaukee to Islip, returning Sun, Sep 28, priced at $273 found 22 hours ago
Southwest Airlines
Fri, Sep 26 - Sun, Sep 28
MKE
Milwaukee
ISP
Islip
$288 Roundtrip, found 22 hours ago
$288
Roundtrip
found 22 hours ago
Select Southwest Airlines flight, departing Fri, Sep 26 from Milwaukee to Islip, returning Sun, Sep 28, priced at $288 found 22 hours ago
Southwest Airlines
Fri, Sep 26 - Mon, Sep 29
MKE
Milwaukee
ISP
Islip
$293 Roundtrip, found 6 days ago
$293
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Fri, Sep 26 from Milwaukee to Islip, returning Mon, Sep 29, priced at $293 found 6 days ago
Southwest Airlines
Tue, Aug 12 - Sat, Aug 16
MKE
Milwaukee
ISP
Islip
$302 Roundtrip, found 20 hours ago
$302
Roundtrip
found 20 hours ago
Select Southwest Airlines flight, departing Tue, Aug 12 from Milwaukee to Islip, returning Sat, Aug 16, priced at $302 found 20 hours ago
Southwest Airlines
Fri, Sep 26 - Mon, Sep 29
MKE
Milwaukee
ISP
Islip
$302 Roundtrip, found 6 days ago
$302
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Fri, Sep 26 from Milwaukee to Islip, returning Mon, Sep 29, priced at $302 found 6 days ago
Southwest Airlines
Sat, Aug 30 - Mon, Sep 1
MKE
Milwaukee
ISP
Islip
$305 Roundtrip, found 4 days ago
$305
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Sat, Aug 30 from Milwaukee to Islip, returning Mon, Sep 1, priced at $305 found 4 days ago
JetBlue Airways
Wed, Aug 6 - Tue, Aug 26
MKE
Milwaukee
ISP
Islip
$361 Roundtrip, found 19 hours ago
$361
Roundtrip
found 19 hours ago
Select JetBlue Airways flight, departing Wed, Aug 6 from Milwaukee to Islip, returning Tue, Aug 26, priced at $361 found 19 hours ago
Frontier Airlines
Fri, Aug 1 - Thu, Aug 21
MKE
Milwaukee
ISP
Islip
$435 Roundtrip, found 19 hours ago
$435
Roundtrip
found 19 hours ago
Select Frontier Airlines flight, departing Fri, Aug 1 from Milwaukee to Islip, returning Thu, Aug 21, priced at $435 found 19 hours ago

Alternative airports near Islip

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to MacArthur ISP. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $590
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $590
Flights from Milwaukee (MKE) to Islip (ISP)
Origin airport
General Mitchell Intl.
Destination airport
MacArthur
Airlines serving
Frontier Airlines, JetBlue Airways, Southwest Airlines
Roundtrip price
$250
Distance
775 mi

Milwaukee to Islip Flights

The cheapest times to fly from Milwaukee to Islip

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 Milwaukee to Islip are during the month of September. You can find some of the cheapest flights from Milwaukee to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Milwaukee to Islip

Sunday is one of the best days to book for cheap flights from Milwaukee to Islip: 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 Milwaukee to Islip

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 Milwaukee to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $114 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 Milwaukee to Islip 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 Milwaukee to Islip 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.

 

Frequently asked questions

How much does a flight from General Mitchell Intl. Airport (MKE) to MacArthur Airport (ISP) cost?
Discover the latest flight deals from MKE to ISP by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from MKE to ISP?
The cheapest flights from MKE to ISP are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from MKE to ISP?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from MKE to ISP. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from General Mitchell Intl. Airport (MKE) to MacArthur Airport (ISP)?
You'll have to book a flight with a layover when traveling from General Mitchell Intl. Airport (MKE) to MacArthur Airport (ISP). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from MKE to ISP?
Typically you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary depending on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from General Mitchell Intl. Airport (MKE) to MacArthur Airport (ISP)?
Select a flight from General Mitchell Intl. Airport (MKE) to MacArthur Airport (ISP) that takes off before 3 PM to reduce the risk of delays and cancellations. Later departures have a 22% higher chance of being canceled, on average.**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.
What airports do you fly into for Islip from General Mitchell Intl. Airport (MKE)?
Take a direct flight from General Mitchell Intl. Airport (MKE) to Islip and arrive at LaGuardia Airport (LGA). Another entry point into this city is John F. Kennedy Intl. Airport (JFK).
Is it cheaper to buy a plane ticket from General Mitchell Intl. Airport (MKE) to MacArthur Airport (ISP) last-minute?
Booking your plane ticket from MKE to ISP just before your journey is generally more expensive. However, if you're flexible with your travel dates and times, you could score a cheap last-minute fare.
Is it cheaper to book a MKE to ISP flight and hotel package?
Booking a MKE to ISP flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Select from our extensive range of hotels and then add activities, flights and car rentals to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from General Mitchell Intl. Airport (MKE) to MacArthur Airport (ISP)?
Typically, it's possible to cancel or reschedule your MKE to ISP flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.