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Cheap flights from Islip, New York to Milwaukee from $146

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 6/6. 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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0 bags

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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
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
$295Frontier
Wed, Jun 24 - Sun, Jun 28
Southwest Logo
3:15 pm - 8:35 pm
ISP
-
MKE
6h 20m
1 stop
Southwest Logo
3:05 pm - 9:05 pm
MKE
-
ISP
5h 00m
1 stop
$343Southwest
Sat, Sep 5 - Wed, Sep 9
Southwest Logo
4:40 pm - 10:20 pm
ISP
-
MKE
6h 40m
1 stop
Southwest Logo
6:45 pm - 11:35 pm
MKE
-
ISP
3h 50m
1 stop
$355Southwest
Tue, Jul 21 - Thu, Jul 23
Southwest Logo
4:40 pm - 10:20 pm
ISP
-
MKE
6h 40m
1 stop
Southwest Logo
9:35 am - 4:00 pm
MKE
-
ISP
5h 25m
1 stop
$360Southwest
Tue, Jun 9 - Tue, Jun 16
Southwest Logo
6:00 am - 11:50 am
ISP
-
MKE
6h 50m
1 stop
Southwest Logo
5:10 am - 4:00 pm
MKE
-
ISP
9h 50m
2 stops
$365Southwest
Tue, Jun 9 - Tue, Jun 16
Southwest Logo
4:40 pm - 10:20 pm
ISP
-
MKE
6h 40m
1 stop
Southwest Logo
12:25 pm - 11:40 pm
MKE
-
ISP
10h 15m
2 stops
$367Southwest
Tue, Jul 21 - Thu, Jul 23
Southwest Logo
8:35 am - 12:10 pm
ISP
-
MKE
4h 35m
1 stop
Southwest Logo
3:30 pm - 8:25 pm
MKE
-
ISP
3h 55m
1 stop
$374Southwest
Fri, May 22 - Thu, May 28
Southwest Logo
2:55 pm - 10:25 pm
ISP
-
MKE
8h 30m
2 stops
Southwest Logo
6:00 am - 4:00 pm
MKE
-
ISP
9h 00m
2 stops
$387Southwest
Tue, Jun 9 - Tue, Jun 16
Southwest Logo
8:35 am - 6:20 pm
ISP
-
MKE
10h 45m
2 stops
Southwest Logo
3:30 pm - 11:30 pm
MKE
-
ISP
7h 00m
1 stop
$389Southwest
Fri, May 22 - Thu, May 28
Southwest Logo
6:00 am - 9:25 am
ISP
-
MKE
4h 25m
1 stop
Southwest Logo
5:25 pm - 10:35 pm
MKE
-
ISP
4h 10m
1 stop
$397Southwest
Sat, Jun 20 - Wed, Jun 24

Southwest flights from Islip, New York to Milwaukee

Our best Southwest deals on Islip, New York to Milwaukee flight tickets
Southwest
Sep 5
ISP3:15 pmIslip Long Island
6h 20m
1 stop
MKE8:35 pmMilwaukee-Mitchell
Sep 9
MKE3:05 pmMilwaukee-Mitchell
5h 00m
1 stop
ISP9:05 pmIslip Long Island
$343
Southwest
Jul 21
ISP4:40 pmIslip Long Island
6h 40m
1 stop
MKE10:20 pmMilwaukee-Mitchell
Jul 23
MKE6:45 pmMilwaukee-Mitchell
3h 50m
1 stop
ISP11:35 pmIslip Long Island
$355
Southwest
Jun 9
ISP4:40 pmIslip Long Island
6h 40m
1 stop
MKE10:20 pmMilwaukee-Mitchell
Jun 16
MKE9:35 amMilwaukee-Mitchell
5h 25m
1 stop
ISP4:00 pmIslip Long Island
$360

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 10, 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 6/24

9:52 pm-7:58 am

1 stop11h 06m

Milwaukee-Mitchell

Sun 6/28

8:43 am-8:57 pm

1 stop11h 14m

$295

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Sat 9/5

3:15 pm-8:35 pm

1 stop6h 20m

Milwaukee-Mitchell

Wed 9/9

3:05 pm-9:05 pm

1 stop5h 00m

$343

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Tue 7/21

4:40 pm-10:20 pm

1 stop6h 40m

Milwaukee-Mitchell

Thu 7/23

6:45 pm-11:35 pm

1 stop3h 50m

$355

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Tue 6/9

4:40 pm-10:20 pm

1 stop6h 40m

Milwaukee-Mitchell

Tue 6/16

9:35 am-4:00 pm

1 stop5h 25m

$360

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Tue 6/9

6:00 am-11:50 am

1 stop6h 50m

Milwaukee-Mitchell

Tue 6/16

5:10 am-4:00 pm

2 stops9h 50m

$365

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Tue 7/21

4:40 pm-10:20 pm

1 stop6h 40m

Milwaukee-Mitchell

Thu 7/23

12:25 pm-11:40 pm

2 stops10h 15m

$367
Quickest round-trip

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Fri 5/22

8:35 am-12:10 pm

1 stop4h 35m

Milwaukee-Mitchell

Thu 5/28

3:30 pm-8:25 pm

1 stop3h 55m

$374

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Tue 6/9

2:55 pm-10:25 pm

2 stops8h 30m

Milwaukee-Mitchell

Tue 6/16

6:00 am-4:00 pm

2 stops9h 00m

$387

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Fri 5/22

8:35 am-6:20 pm

2 stops10h 45m

Milwaukee-Mitchell

Thu 5/28

3:30 pm-11:30 pm

1 stop7h 00m

$389

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Sat 6/20

6:00 am-9:25 am

1 stop4h 25m

Milwaukee-Mitchell

Wed 6/24

5:25 pm-10:35 pm

1 stop4h 10m

$397

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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
West Bend
Port Washington
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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