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Cheap flights from Islip to Milwaukee from $209

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 to Milwaukee departing on 9/28. 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 to Milwaukee (ISP-MKE)

Cheap round-trip flights

Southwest Logo
6:05 am - 9:20 amISP-MKE
4h 15m1 stop
Southwest Logo
4:00 pm - 10:05 pmMKE-ISP
5h 05m1 stop
$277Southwest
Find Deal
Tue, Sep 16 - Tue, Sep 23
Southwest Logo
6:05 am - 11:30 amISP-MKE
6h 25m2 stops
Southwest Logo
4:00 pm - 10:05 pmMKE-ISP
5h 05m1 stop
$282Southwest
Find Deal
Tue, Sep 16 - Tue, Sep 23
Southwest Logo
4:00 pm - 10:25 pmISP-MKE
7h 25m2 stops
Southwest Logo
6:15 am - 3:10 pmMKE-ISP
7h 55m2 stops
$294Southwest
Find Deal
Tue, Sep 16 - Tue, Sep 23
Southwest Logo
5:55 am - 3:40 pmISP-MKE
10h 45m1 stop
Southwest Logo
6:45 am - 12:10 pmMKE-ISP
4h 25m1 stop
$306Southwest
Find Deal
Fri, Oct 10 - Sun, Oct 12
Southwest Logo
12:35 pm - 10:45 pmISP-MKE
11h 10m2 stops
Southwest Logo
6:45 am - 12:10 pmMKE-ISP
4h 25m1 stop
$319Southwest
Find Deal
Fri, Oct 10 - Sun, Oct 12
Southwest Logo
5:55 am - 3:40 pmISP-MKE
10h 45m1 stop
Southwest Logo
11:35 am - 10:10 pmMKE-ISP
9h 35m1 stop
$395Southwest
Find Deal
Fri, Oct 10 - Mon, Oct 13
Southwest Logo
12:35 pm - 10:45 pmISP-MKE
11h 10m2 stops
Southwest Logo
1:45 pm - 11:50 pmMKE-ISP
9h 05m2 stops
$397Southwest
Find Deal
Fri, Oct 10 - Sun, Oct 12
Southwest Logo
12:35 pm - 10:45 pmISP-MKE
11h 10m2 stops
Southwest Logo
11:35 am - 10:10 pmMKE-ISP
9h 35m1 stop
$418Southwest
Find Deal
Fri, Oct 10 - Mon, Oct 13
Logo
9:37 pm - 6:31 pmISP-MKE
21h 54m2 stops
Logo
12:42 pm - 8:52 pmMKE-ISP
7h 10m1 stop
$554
Find Deal
Thu, Oct 9 - Sun, Oct 12
Southwest Logo
12:35 pm - 10:45 pmISP-MKE
11h 10m2 stops
Southwest Logo
12:35 pm - 10:10 pmMKE-ISP
8h 35m2 stops
$560Southwest
Find Deal
Fri, Oct 10 - Mon, Oct 13

Southwest flights from Islip to Milwaukee

Our best Southwest deals on Islip to Milwaukee flight tickets
Southwest
Sep 16
ISP6:05 amIslip Long Island
4h 15m
1 stop
MKE9:20 amMilwaukee-Mitchell
Sep 23
MKE4:00 pmMilwaukee-Mitchell
5h 05m
1 stop
ISP10:05 pmIslip Long Island
$277
Find similar
Southwest
Sep 16
ISP6:05 amIslip Long Island
6h 25m
2 stops
MKE11:30 amMilwaukee-Mitchell
Sep 23
MKE4:00 pmMilwaukee-Mitchell
5h 05m
1 stop
ISP10:05 pmIslip Long Island
$282
Find similar
Southwest
Sep 16
ISP4:00 pmIslip Long Island
7h 25m
2 stops
MKE10:25 pmMilwaukee-Mitchell
Sep 23
MKE6:15 amMilwaukee-Mitchell
7h 55m
2 stops
ISP3:10 pmIslip Long Island
$294
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated August 21, 2025.
Use the filters below to find and compare flights from Islip to Milwaukee that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Tue 9/16

6:05 am-9:20 am

1 stop4h 15m

Milwaukee-Mitchell

Tue 9/23

4:00 pm-10:05 pm

1 stop5h 05m

$277

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Tue 9/16

6:05 am-11:30 am

2 stops6h 25m

Milwaukee-Mitchell

Tue 9/23

4:00 pm-10:05 pm

1 stop5h 05m

$282

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Tue 9/16

4:00 pm-10:25 pm

2 stops7h 25m

Milwaukee-Mitchell

Tue 9/23

6:15 am-3:10 pm

2 stops7h 55m

$294

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Fri 10/10

5:55 am-3:40 pm

1 stop10h 45m

Milwaukee-Mitchell

Sun 10/12

6:45 am-12:10 pm

1 stop4h 25m

$306

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Fri 10/10

12:35 pm-10:45 pm

2 stops11h 10m

Milwaukee-Mitchell

Sun 10/12

6:45 am-12:10 pm

1 stop4h 25m

$319

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Fri 10/10

5:55 am-3:40 pm

1 stop10h 45m

Milwaukee-Mitchell

Mon 10/13

11:35 am-10:10 pm

1 stop9h 35m

$395

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Fri 10/10

12:35 pm-10:45 pm

2 stops11h 10m

Milwaukee-Mitchell

Sun 10/12

1:45 pm-11:50 pm

2 stops9h 05m

$397

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Fri 10/10

12:35 pm-10:45 pm

2 stops11h 10m

Milwaukee-Mitchell

Mon 10/13

11:35 am-10:10 pm

1 stop9h 35m

$418

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Thu 10/9

9:37 pm-6:31 pm

2 stops21h 54m

Milwaukee-Mitchell

Sun 10/12

12:42 pm-8:52 pm

1 stop7h 10m

$554

IslipMilwaukee

ISP - MKE

ISPMKE

Islip Long Island

Fri 10/10

12:35 pm-10:45 pm

2 stops11h 10m

Milwaukee-Mitchell

Mon 10/13

12:35 pm-10:10 pm

2 stops8h 35m

$560

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Milwaukee from

How to get the cheapest flight ticket from Islip 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. The lowest ticket price found for a Saturday departure recently was $374. 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 to Milwaukee on a Monday will generally be more expensive and average around $497. 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?

At noon is the cheapest time of day to fly from Islip to Milwaukee when you can find flight prices for as low as $375. Flying to Milwaukee at noon is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to Milwaukee, so prices are often more expensive at around $428 per ticket.

When to book flights from Islip to Milwaukee

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

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

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

Direct flights

None
There are no direct flights from Islip to Milwaukee. There are no popular flight routes from Islip to Milwaukee.
Search flight deals

  • 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 15m.

  • 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 many operators does momondo search for flights from Islip Long Island Airport to Milwaukee-Mitchell Airport?

  • 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.

  • What is the most popular airline from Islip to Milwaukee?

Best airlines flying from Islip to Milwaukee

Compare and see reviews for airlines that fly from Islip to Milwaukee with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $302Free CancellationRating
8.0
4,245 reviews
Search Southwest flights

Traveling to a place near Milwaukee?

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

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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