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Cheap flights from Islip, New York to Milwaukee from $115

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to Milwaukee departing on 6/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Islip, New York to Milwaukee

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
11:00 am - 8:01 am
ISP
-
MKE
22h 01m
1 stop
Frontier Logo
8:46 am - 10:05 am
MKE
-
ISP
24h 19m
1 stop
$242Frontier
Wed, May 27 - Sun, May 31
Southwest Logo
4:40 pm - 10:20 pm
ISP
-
MKE
6h 40m
1 stop
Southwest Logo
6:45 am - 1:45 pm
MKE
-
ISP
6h 00m
1 stop
$279Southwest
Tue, Jul 21 - Tue, Jul 28
Southwest Logo
2:55 pm - 10:25 pm
ISP
-
MKE
8h 30m
2 stops
Southwest Logo
9:35 am - 4:00 pm
MKE
-
ISP
5h 25m
1 stop
$284Southwest
Tue, Jul 21 - Tue, Jul 28
Southwest Logo
2:55 pm - 10:45 pm
ISP
-
MKE
8h 50m
2 stops
Southwest Logo
5:10 am - 4:00 pm
MKE
-
ISP
9h 50m
2 stops
$289Southwest
Tue, Jul 21 - Tue, Jul 28
Frontier Logo
9:52 pm - 7:58 am
ISP
-
MKE
11h 06m
1 stop
Frontier Logo
8:43 am - 8:57 pm
MKE
-
ISP
11h 14m
1 stop
$299Frontier
Mon, Jun 15 - Sun, Jun 21
Southwest Logo
3:05 pm - 7:30 pm
ISP
-
MKE
5h 25m
1 stop
Southwest Logo
5:10 pm - 11:35 pm
MKE
-
ISP
5h 25m
1 stop
$400Southwest
Fri, Jul 17 - Sun, Jul 19
Southwest Logo
6:30 am - 3:15 pm
ISP
-
MKE
9h 45m
2 stops
Southwest Logo
11:45 am - 11:45 pm
MKE
-
ISP
11h 00m
1 stop
$422Southwest
Wed, May 27 - Sun, May 31
Southwest Logo
3:05 pm - 12:05 am
ISP
-
MKE
10h 00m
2 stops
Southwest Logo
5:10 pm - 11:35 pm
MKE
-
ISP
5h 25m
1 stop
$439Southwest
Fri, Jul 17 - Sun, Jul 19
Southwest Logo
2:30 pm - 10:50 pm
ISP
-
MKE
9h 20m
2 stops
Southwest Logo
12:10 pm - 11:45 pm
MKE
-
ISP
10h 35m
2 stops
$470Southwest
Wed, May 27 - Sun, May 31
Southwest Logo
5:50 pm - 12:15 am
ISP
-
MKE
7h 25m
2 stops
Southwest Logo
1:35 pm - 11:35 pm
MKE
-
ISP
9h 00m
2 stops
$509Southwest
Fri, Jul 17 - Sun, Jul 19

Frontier flights from Islip, New York to Milwaukee

Our best Frontier deals on Islip, New York to Milwaukee flight tickets
Frontier
May 27
ISP11:00 amIslip Long Island
22h 01m
1 stop
MKE8:01 amMilwaukee-Mitchell
May 31
MKE8:46 amMilwaukee-Mitchell
24h 19m
1 stop
ISP10:05 amIslip Long Island
$242
Frontier
Jun 15
ISP9:52 pmIslip Long Island
11h 06m
1 stop
MKE7:58 amMilwaukee-Mitchell
Jun 21
MKE8:43 amMilwaukee-Mitchell
11h 14m
1 stop
ISP8:57 pmIslip Long Island
$299

Southwest flights from Islip, New York to Milwaukee

Our best Southwest deals on Islip, New York to Milwaukee flight tickets
Southwest
Jul 21
ISP4:40 pmIslip Long Island
6h 40m
1 stop
MKE10:20 pmMilwaukee-Mitchell
Jul 28
MKE6:45 amMilwaukee-Mitchell
6h 00m
1 stop
ISP1:45 pmIslip Long Island
$279
Southwest
Jul 21
ISP2:55 pmIslip Long Island
8h 30m
2 stops
MKE10:25 pmMilwaukee-Mitchell
Jul 28
MKE9:35 amMilwaukee-Mitchell
5h 25m
1 stop
ISP4:00 pmIslip Long Island
$284
Southwest
Jul 21
ISP2:55 pmIslip Long Island
8h 50m
2 stops
MKE10:45 pmMilwaukee-Mitchell
Jul 28
MKE5:10 amMilwaukee-Mitchell
9h 50m
2 stops
ISP4:00 pmIslip Long Island
$289

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York 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, momondo users made 832,500 searches. Data last updated May 17, 2026.
Use the filters below to find and compare flights from Islip, New York to Milwaukee that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Wed 5/27

11:00 am-8:01 am

1 stop22h 01m

Milwaukee-Mitchell

Sun 5/31

8:46 am-10:05 am

1 stop24h 19m

$242

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Tue 7/21

4:40 pm-10:20 pm

1 stop6h 40m

Milwaukee-Mitchell

Tue 7/28

6:45 am-1:45 pm

1 stop6h 00m

$279

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Tue 7/21

2:55 pm-10:25 pm

2 stops8h 30m

Milwaukee-Mitchell

Tue 7/28

9:35 am-4:00 pm

1 stop5h 25m

$284

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Tue 7/21

2:55 pm-10:45 pm

2 stops8h 50m

Milwaukee-Mitchell

Tue 7/28

5:10 am-4:00 pm

2 stops9h 50m

$289

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Mon 6/15

9:52 pm-7:58 am

1 stop11h 06m

Milwaukee-Mitchell

Sun 6/21

8:43 am-8:57 pm

1 stop11h 14m

$299
Quickest round-trip

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Fri 7/17

3:05 pm-7:30 pm

1 stop5h 25m

Milwaukee-Mitchell

Sun 7/19

5:10 pm-11:35 pm

1 stop5h 25m

$400

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Wed 5/27

6:30 am-3:15 pm

2 stops9h 45m

Milwaukee-Mitchell

Sun 5/31

11:45 am-11:45 pm

1 stop11h 00m

$422

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Fri 7/17

3:05 pm-12:05 am

2 stops10h 00m

Milwaukee-Mitchell

Sun 7/19

5:10 pm-11:35 pm

1 stop5h 25m

$439

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Wed 5/27

2:30 pm-10:50 pm

2 stops9h 20m

Milwaukee-Mitchell

Sun 5/31

12:10 pm-11:45 pm

2 stops10h 35m

$470

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Fri 7/17

5:50 pm-12:15 am

2 stops7h 25m

Milwaukee-Mitchell

Sun 7/19

1:35 pm-11:35 pm

2 stops9h 00m

$509

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Milwaukee from

How to get the cheapest flight ticket from Islip, New York to Milwaukee

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Milwaukee?

According to our data, Saturday is the cheapest day to fly to Milwaukee from Islip, New York. The lowest ticket price found for a Saturday departure recently was $424. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Islip, New York to Milwaukee on a Monday will generally be more expensive and average around $596. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Milwaukee?

In the evening is the cheapest time of day to fly from Islip, New York to Milwaukee when you can find flight prices for as low as $431. Flying to Milwaukee in the evening is an ideal time because this is during off-peak travel hours. At noon is when there is more demand to fly to Milwaukee, so prices are often more expensive at around $619 per ticket.

When to book flights from Islip, New York to Milwaukee

Are you open to changing your travel dates? Check out the ideal times to fly from Islip, New York to Milwaukee according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip, New York to Milwaukee (ISP to MKE) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to Milwaukee

Fastest flight time

4h 35m

Direct flights

None
The fastest flight from Islip, New York to Milwaukee takes 4h 35m
There are no direct flights from Islip, New York to Milwaukee. There are no popular flight routes from Islip, New York to Milwaukee.
Search flight deals

Frequently asked questions about flying from Islip, New York to Milwaukee

  • How far is Islip Long Island to Milwaukee-Mitchell by plane?

    There are 771.0 mi between Islip Long Island and Milwaukee-Mitchell. By plane, this route typically takes 4h 35m.

  • When did momondo last update prices for flights from Islip Long Island Airport to Milwaukee-Mitchell Airport?

    Prices for flights from Islip Long Island Airport to Milwaukee-Mitchell Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Islip Long Island Airport to Milwaukee-Mitchell Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to Milwaukee-Mitchell Airport.

  • What documentation or ID do you need to fly to Milwaukee-Mitchell Airport?

    The travel and health documents you'll need for your trip to Milwaukee-Mitchell Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Milwaukee-Mitchell Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Milwaukee?

Book flights to Milwaukee if you plan to visit one of these locations
Sheboygan
Waukesha
Wauwatosa
Oak Creek
Mequon
Glendale
Pewaukee
Port Washington
West Bend
Kohler
New Berlin
Grafton

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Milwaukee?

It is quick and easy to find Islip to Milwaukee flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Milwaukee that suits you.

Can I find flights from Islip to Milwaukee with flexible booking policies on momondo?

Yes. All flights to Milwaukee from Islip on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Islip to Milwaukee?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Islip to Milwaukee.

I’m not ready to book a flight from Islip to Milwaukee right now. Can momondo alert me if prices change?

Price alerts on flights to Milwaukee from Islip are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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