$108 Cheap Flights from Milwaukee (MKE) to San Juan (SJU)

View $108 flight on Tue, Sep 30, 2025Opens in a new window

Popular airlines from General Mitchell Intl. Airport (MKE) to Luis Munoz Marin Intl. Airport (SJU)

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Cheap Flights from Milwaukee to San Juan (MKE-SJU)

Prices were available within the past 7 days and start at $108 for one-way flights and $215 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, Oct 27 - Thu, Oct 30
MKE
Milwaukee
SJU
San Juan
$215 Roundtrip, found 1 hour ago
$215
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Mon, Oct 27 from Milwaukee to San Juan, returning Thu, Oct 30, priced at $215 found 1 hour ago
Southwest Airlines
Tue, Sep 2 - Fri, Sep 12
MKE
Milwaukee
SJU
San Juan
$215 Roundtrip, found 5 hours ago
$215
Roundtrip
found 5 hours ago
Select Southwest Airlines flight, departing Tue, Sep 2 from Milwaukee to San Juan, returning Fri, Sep 12, priced at $215 found 5 hours ago
United
Tue, Dec 9 - Wed, Dec 17
MKE
Milwaukee
SJU
San Juan
$217 Roundtrip, found 3 hours ago
$217
Roundtrip
found 3 hours ago
Select United flight, departing Tue, Dec 9 from Milwaukee to San Juan, returning Wed, Dec 17, priced at $217 found 3 hours ago
United
Mon, Oct 27 - Thu, Oct 30
MKE
Milwaukee
SJU
San Juan
$218 Roundtrip, found 1 hour ago
$218
Roundtrip
found 1 hour ago
Select United flight, departing Mon, Oct 27 from Milwaukee to San Juan, returning Thu, Oct 30, priced at $218 found 1 hour ago
Delta
Wed, Jan 21 - Sat, Jan 31
MKE
Milwaukee
SJU
San Juan
$222 Roundtrip, found 1 hour ago
$222
Roundtrip
found 1 hour ago
Select Delta flight, departing Wed, Jan 21 from Milwaukee to San Juan, returning Sat, Jan 31, priced at $222 found 1 hour ago
American Airlines
Sun, Nov 2 - Mon, Nov 10
MKE
Milwaukee
SJU
San Juan
$222 Roundtrip, found 1 day ago
$222
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sun, Nov 2 from Milwaukee to San Juan, returning Mon, Nov 10, priced at $222 found 1 day ago
Delta
Mon, Oct 27 - Thu, Oct 30
MKE
Milwaukee
SJU
San Juan
$223 Roundtrip, found 1 hour ago
$223
Roundtrip
found 1 hour ago
Select Delta flight, departing Mon, Oct 27 from Milwaukee to San Juan, returning Thu, Oct 30, priced at $223 found 1 hour ago
Delta
Sun, Jan 11 - Thu, Jan 29
MKE
Milwaukee
SJU
San Juan
$225 Roundtrip, just found
$225
Roundtrip
just found
Select Delta flight, departing Sun, Jan 11 from Milwaukee to San Juan, returning Thu, Jan 29, priced at $225 just found
United
Tue, Oct 21 - Sat, Oct 25
MKE
Milwaukee
SJU
San Juan
$230 Roundtrip, found 5 hours ago
$230
Roundtrip
found 5 hours ago
Select United flight, departing Tue, Oct 21 from Milwaukee to San Juan, returning Sat, Oct 25, priced at $230 found 5 hours ago
Spirit Airlines
Sat, Aug 16 - Fri, Aug 22
MKE
Milwaukee
SJU
San Juan
$244 Roundtrip, just found
$244
Roundtrip
just found
Select Spirit Airlines flight, departing Sat, Aug 16 from Milwaukee to San Juan, returning Fri, Aug 22, priced at $244 just found

Find the cheapest month to fly from Milwaukee (MKE) to San Juan (SJU)

January is typically the cheapest month to fly

From $165 - $482 per traveler.

Graph displaying average flight prices per month

Alternative airports near San Juan

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

Select flight to Luis Munoz Marin Intl. SJU. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $437
SJU
Luis Munoz Marin Intl.
Cheapest
Average driving time to city center16 min
Flights from $437
Flights from Milwaukee (MKE) to San Juan (SJU)
Origin airport
General Mitchell Intl.
Destination airport
Luis Munoz Marin Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$209
Distance
2121 mi

Milwaukee to San Juan Flights

The cheapest times to fly from Milwaukee to San Juan

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

 

The best time to book a flight from Milwaukee to San Juan

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

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 San Juan in 2025. You can also book with separate airlines for your outbound and return journeys, from $108 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 San Juan 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 San Juan 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 Luis Munoz Marin Intl. Airport (SJU) cost?
Discover the latest flight deals from MKE to SJU 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 SJU?
The cheapest flights from MKE to SJU 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 SJU?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from MKE to SJU. 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 Luis Munoz Marin Intl. Airport (SJU)?
Nonstop flights from General Mitchell Intl. Airport (MKE) to Luis Munoz Marin Intl. Airport (SJU) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from MKE to SJU?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can change 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 Luis Munoz Marin Intl. Airport (SJU)?
Book a flight from General Mitchell Intl. Airport (MKE) to Luis Munoz Marin Intl. Airport (SJU) that leaves before 3 PM to reduce the risk of delays and cancellations. Departures after this time are on average 22% more likely to be canceled.**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.
Is it cheaper to buy a plane ticket from General Mitchell Intl. Airport (MKE) to Luis Munoz Marin Intl. Airport (SJU) last-minute?
Waiting until just before your departure to book a flight from MKE to SJU often results in higher prices. While you may come across some last-minute discounts, they're not always guaranteed. Be flexible with your itinerary for the best chance of landing a bargain.
Can I cancel or change the date of my flight from General Mitchell Intl. Airport (MKE) to Luis Munoz Marin Intl. Airport (SJU)?
In most cases, you can reschedule or cancel your MKE to SJU flight. However, there may be additional charges, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's fees and rules on flight changes, or if you'd like more details, head to our Customer Service portal.

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*Available to One Key members.