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$157+ Cheap flights from Islip, NY to Milwaukee (ISP - MKE)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — MKE
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$318
(Frontier)

One-way from

$157
(Southwest)

Popular in

December

Cheapest in

April

Average price

$346
Provider with most accurate pricing for Islip Long Island-Milwaukee-Mitchell flight deals.
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Provider most trusted by Cheapflights users for Islip Long Island-Milwaukee-Mitchell flights.
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From Islip Long Island to Milwaukee-Mitchell
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One-way flight from Islip Long Island to Milwaukee-Mitchell
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Highest demand for flights based on searches. 21% potential increase in price ($87 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Islip to Milwaukee

Cheapest flights from Islip to Milwaukee
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 March 28, 2025.

This Frontier deal was found by Cheapflights users on 3/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/179:00 amISP - MKE
1 stop11h 03mFrontier
Sun 4/207:53 pmMKE - ISP
1 stop11h 17mFrontier
Deal found 3/27$318
This Southwest deal was found by Cheapflights users on 3/27. 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 4/1110:30 amISP - MKE
2 stops8h 05mSouthwest
Tue 4/155:10 amMKE - ISP
1 stop6h 00mSouthwest
Deal found 3/27$462

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 March 28, 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 4/17

9:00 am-7:03 pm

1 stop11h 03m

Milwaukee-Mitchell

Sun 4/20

7:53 pm-8:10 am

1 stop11h 17m

$318

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Fri 4/11

10:30 am-5:35 pm

2 stops8h 05m

Milwaukee-Mitchell

Tue 4/15

5:10 am-12:10 pm

1 stop6h 00m

$462

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Wed 4/23

6:10 am-3:05 pm

2 stops9h 55m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Islip, New York-Milwaukee flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-Milwaukee flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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, February is the cheapest month in which you can book a flight from Islip, New York to Milwaukee (average of $280). Flying from Islip, New York to Milwaukee in June is currently the most expensive (average of $376). 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 March 28, 2025.

When flying from Islip, New York to Milwaukee, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Milwaukee by month

Plan your trip to Milwaukee by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Milwaukee ranges from 1.4 - 4.0 inches per month. June is typically the wettest month, when rainfall can reach 4.0 in. January is typically the driest time to visit Milwaukee when rainfall is around 1.4 in.

Temperature in Milwaukee by month

Plan your trip to Milwaukee by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Milwaukee, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

Reviews of airlines servicing Milwaukee

Get insights into the airlines that provide service to Milwaukee. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Milwaukee. Reviews last updated March 28, 2025.
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Frontier
6.0
Okay
3,271 reviews
Southwest
8.1
Very good
4,274 reviews

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

  • What are the cheapest airlines flying from Islip, New York to Milwaukee round-trip?

    According to our current data, Frontier ($318), and Southwest ($462) offers the cheapest pricing from Islip, New York to Milwaukee.

  • Can I find deals for flights from Islip to Milwaukee that include hotel bookings?

    Yes. In addition to deals on Islip to Milwaukee flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Milwaukee?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Milwaukee.

  • Can I find deals for business class flights from Islip to Milwaukee?

    Yes. Cheapflights offers flight deals from Islip to Milwaukee by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip, New York to Milwaukee?

    Currently, February is the cheapest month in which you can book a flight from Islip, New York to Milwaukee (average of $280). Flying from Islip, New York to Milwaukee in June is currently the most expensive (average of $376). 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.

See more FAQs

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Mequon
Pewaukee
Sheboygan
Oak Creek
Wauwatosa

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