MKE - SJU

$111 Find Cheap Flights from Milwaukee to San Juan

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Milwaukee to San Juan departing on 5/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Juan Luis Munoz Marin Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Milwaukee to San Juan.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Milwaukee to San Juan.
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41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$288
Overall average: $373
Southwest
Tue 4/21Wed 5/6
MKE - SJU • 1 stop
Cheapest one-way
$111
Typical prices: $108-$190
Frontier
Tue 5/5
MKE - SJU • 1 stop
Top airlines
Cheapest • from $288 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Milwaukee and San Juan. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $369 (round-trip)
Shortest trip • 6h 40m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 29% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Juan!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Milwaukee to San Juan that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Milwaukee to San Juan

Tue, Apr 21 - Wed, May 6
Southwest Logo
9:15 am - 10:40 pm
MKE
-
SJU
12h 25m
1 stop
Southwest Logo
2:00 pm - 9:45 pm
SJU
-
MKE
8h 45m
2 stops
$288Southwest
Sat, Apr 18 - Wed, Apr 22
Frontier Logo
7:53 pm - 11:29 pm
MKE
-
SJU
26h 36m
1 stop
Frontier Logo
6:30 am - 11:26 am
SJU
-
MKE
29h 56m
1 stop
$293Frontier
Mon, Apr 13 - Wed, Apr 15
Frontier Logo
4:32 pm - 12:52 am
MKE
-
SJU
7h 20m
1 stop
Frontier Logo
3:21 am - 11:26 am
SJU
-
MKE
9h 05m
1 stop
$294Frontier
Mon, Apr 20 - Wed, Apr 29
United Airlines Logo
10:45 am - 9:24 pm
MKE
-
SJU
9h 39m
2 stops
United Airlines Logo
1:00 am - 9:45 am
SJU
-
MKE
9h 45m
2 stops
$298United Airlines
Sat, Apr 11 - Wed, Apr 15
Frontier Logo
1:37 pm - 2:01 am
MKE
-
SJU
11h 24m
1 stop
Frontier Logo
6:30 am - 11:26 am
SJU
-
MKE
29h 56m
1 stop
$299Frontier
Sun, Mar 29 - Wed, Apr 15
Frontier Logo
9:01 pm - 8:54 am
MKE
-
SJU
10h 53m
1 stop
Frontier Logo
10:54 am - 11:26 am
SJU
-
MKE
25h 32m
1 stop
$300Frontier
Sat, May 16 - Thu, May 21
Delta Logo
12:40 pm - 11:35 pm
MKE
-
SJU
9h 55m
1 stop
Delta Logo
7:30 am - 5:30 pm
SJU
-
MKE
11h 00m
1 stop
$301Delta
Mon, Apr 13 - Wed, Apr 15
Frontier Logo
4:32 pm - 12:52 am
MKE
-
SJU
7h 20m
1 stop
Frontier Logo
3:21 am - 11:26 am
SJU
-
MKE
9h 05m
1 stop
$304Frontier
Wed, May 6 - Wed, Aug 5
United Airlines Logo
10:20 am - 8:34 pm
MKE
-
SJU
9h 14m
1 stop
United Airlines Logo
2:05 am - 12:48 pm
SJU
-
MKE
11h 43m
2 stops
$305United Airlines
Sat, Aug 22 - Fri, Aug 28
American Airlines Logo
12:37 pm - 11:41 pm
MKE
-
SJU
10h 04m
1 stop
American Airlines Logo
2:25 pm - 11:47 pm
SJU
-
MKE
10h 22m
1 stop
$306American Airlines
Booking Insights

KAYAK's insights & trends for Milwaukee to San Juan flights

Get data-powered insights and trends into flights from Milwaukee to San Juan to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Milwaukee to San Juan Luis Munoz Marin Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Milwaukee to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Milwaukee to San Juan Luis Munoz Marin Intl Airport is September, where tickets cost $315 (return) on average. On the other hand, the most expensive months are December and November, where the average cost of round-trip tickets is $676 and $518 respectively.

How far in advance should I book a flight from Milwaukee to San Juan Luis Munoz Marin Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Milwaukee to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Milwaukee to San Juan Luis Munoz Marin Intl Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Good to know

Low seasonJuly
Cheapest flight$111
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from Milwaukee to San Juan

When to book flights from Milwaukee to San Juan

Are your dates flexible? Find out the best times to travel from Milwaukee to San Juan based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Milwaukee to San Juan flights

  • What is the cheapest flight from Milwaukee to San Juan Luis Munoz Marin Intl Airport?

    In the last 3 days, the lowest price for a flight from Milwaukee to San Juan Luis Munoz Marin Intl Airport was $111 for a one-way ticket and $288 for a round-trip.

  • Do I need a passport to fly between Milwaukee and San Juan?

    Yes, you’ll need a passport to travel to San Juan from Milwaukee.

  • Which airports will I be using when flying from Milwaukee to San Juan?

    On your way to San Juan, you’ll fly out from Milwaukee-Mitchell. You’ll be landing at San Juan Luis Munoz Marin Intl.

  • Which aircraft models fly most regularly from Milwaukee to San Juan?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Milwaukee to San Juan?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Milwaukee and San Juan, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to San Juan from Milwaukee?

    Atlanta is the most popular layover city among KAYAK users traveling from Milwaukee to San Juan.

  • Which is the best airline for flights from Milwaukee to San Juan, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Milwaukee to San Juan are Southwest and Delta. With an average price for the route of $483 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $389 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Milwaukee to San Juan?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Milwaukee to San Juan.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Milwaukee to San Juan?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan from Milwaukee is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Milwaukee to San Juan?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Juan with an airline and back to Milwaukee with another airline. Booking your flights between Milwaukee and SJU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Milwaukee to San Juan?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Juan from Milwaukee up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Milwaukee to San Juan

 
See real verified KAYAK customer reviews for airlines flying from Milwaukee to San Juan. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Milwaukee to San Juan? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4320 reviews
7.5Entertainment
8.0Comfort
7.0Food
8.1Boarding
8.6Crew
Airline reviews

We had a 5 hour delay on the tarmac in Baltimore

2.0 MediocreDavid, Mar 2026
ALB - BWI
Read more Southwest reviews

We had a 5 hour delay on the tarmac in Baltimore

Long layover between flights to Long Island from BWI - need better coordination between flights

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

I realize they are still working out kinks with the new boarding process, but by the time I boarded in group 5, most of the bins were full. All airlines should better enforce small bags and jackets going under the seats until everyone has boarded.

WiFi was not working and didn’t have a beverage service

Snacks are always pretzels. Why can't you also offer peanuts ?

Perhaps when you’re sitting in 1st class and the crew closes the bathroom for the pilots, there could be a notification other than holding your hands up as a blockade when you get there and you’re told the restrooms are closed please turn around … especially at night when visibility is poor and you’re met by a flight attendants with their arms up

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Loved flying First Class. Very comfortable. The seat was amazing. Enjoyed a movie and was able to relax so much better than in coach.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

With Aeromexico it ended up good but with Delta it was bad because we did everything through Delta... Showed up at the Delta terminal... It was the wrong place! Nothing ever told us to go to the Aeromexico terminal. It said "in partnership with Aeromexico" but I was never instructed to check in with them or go to their terminal. We had to haul @$$ running through the airport and almost didn't make it thanks to this poor communication. 👎🏽

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Both my flight where delayed Had 25min to make it to my transfer flight

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

The 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

It’s always a great time flying with united airlines.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

Delay after delay with little communication then AA lost my luggage and at airport would not assist just said scan this QR code to track your luggage and submit a claim. However QR code provided did not work so have to go back to airport

After changing the departure gate 5 times making us mo e from one side of the airport to the other and then back the flight was delayed nearly 2 hours. The male flight attendant had a bad attitude with the guest being condescending, disrespectful with people who were already on edge.

Easy boarding. Rows are smaller but that may be an older and bigger me now :)

It would have been nice if American tried to care.

American Airlines did everything they could with the high Spring Break crowd. I was frustrated to be changed from 1st class to a middle seat at the back of the plane. This has happened before, not sure booking 1st class and paying the extra actually works.

I booked 1st class, my flights were changed and I was sitting in the middle at the back of the plane. A far cry from the 1st class I purchased for my flights. I am grateful I arrived on time.

Aging planer and NO wifi on a 14 hour day flight. Unless you are retired or don't need to work or be in touch with the world... The lack of Wifif really ruined the flight. And the old plane - really showing it's age, wasn't great

There was no beverage service and the only time I saw a crew member walk through the cabin is when we were preparing to land.

Our flight was delayed 3 times and this is why I am giving such low reviews. Everything else was okay but being in the airport at 4:30pm for my initial flight at 7pm to not leave until after 9:30pm is insane,

Flights were constantly delayed. CRW took 50 minutes to get bags

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

There's no seats that lean back with little leg space i wad uncomfortable the entire flight. Your charges for extra baggage is despicable and costly!!

Remind customers of the need to have passport or new ID for boarding.

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

The flight never took off and we spent 7 hours at the airport

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

This is my second time flying with Frontier. My current experience was very favorable. The staff from the gate to the plane was friendly, warm and professional. The food options lacked in my opinion. This area needs some attention in my opinion.

First of all we hade waited 3 hours in the airplane waiting to leave. Second the return schedule was changed and it messed up my entire vaction. I won't buy never again another flight and recommend to nobody traveling with them.

Everything you need to know for your flight from Milwaukee to San Juan

Information on your arrival and departure airports