MKE - SJU

$101 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 3/10. 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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Everything you should know

Cheapest round-trip
$266
Typical prices: $319-$434
American Airlines
Mon 4/13Fri 4/17
MKE - SJU • 2 stops
Cheapest one-way
$101
Typical prices: $163-$279
Frontier
Tue 3/10
MKE - SJU • 1 stop
Top airlines
American Airlines
Cheapest • from $266 (round-trip)
Southwest
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
New York (JFK)
Cheapest • Avg $367 (round-trip)
Detroit (DTW)
Shortest trip • 6h 40m (one-way)
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 29% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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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

Mon, Apr 13 - Fri, Apr 17
American Airlines Logo
7:01 am - 8:51 pm
MKE
-
SJU
12h 50m
2 stops
American Airlines Logo
7:25 am - 5:51 pm
SJU
-
MKE
11h 26m
1 stop
$266American Airlines
Tue, Apr 14 - Tue, Apr 21
American Airlines Logo
11:49 am - 11:02 pm
MKE
-
SJU
10h 13m
1 stop
American Airlines Logo
5:45 am - 6:00 pm
SJU
-
MKE
13h 15m
2 stops
$270American Airlines
Sat, Apr 18 - Wed, Apr 22
Frontier Logo
7:53 pm - 11:29 pm
MKE
-
SJU
26h 36m
1 stop
Frontier Logo
10:59 am - 11:26 am
SJU
-
MKE
25h 27m
1 stop
$272Frontier
Tue, Apr 28 - Sat, May 2
Southwest Logo
11:30 am - 11:40 pm
MKE
-
SJU
11h 10m
2 stops
Southwest Logo
6:25 am - 2:20 pm
SJU
-
MKE
8h 55m
1 stop
$277Southwest
Tue, Mar 17 - Tue, Mar 24
Frontier Logo
6:35 pm - 8:54 am
MKE
-
SJU
13h 19m
1 stop
Frontier Logo
6:30 am - 5:50 pm
SJU
-
MKE
12h 20m
1 stop
$279Frontier
Thu, Apr 16 - Sat, Apr 18
Frontier Logo
12:21 pm - 2:06 pm
MKE
-
SJU
24h 45m
1 stop
Frontier Logo
10:54 am - 8:38 am
SJU
-
MKE
22h 44m
1 stop
$280Frontier
Sat, May 2 - Fri, May 8
United Airlines Logo
8:33 am - 8:38 pm
MKE
-
SJU
11h 05m
2 stops
United Airlines Logo
1:00 am - 10:04 am
SJU
-
MKE
10h 04m
1 stop
$284United Airlines
Fri, Apr 17 - Sat, Apr 25
Frontier Logo
7:34 pm - 2:01 am
MKE
-
SJU
29h 27m
1 stop
Frontier Logo
8:00 am - 8:38 am
SJU
-
MKE
25h 38m
1 stop
$288Frontier
Fri, Apr 17 - Sun, Apr 19
Frontier Logo
7:34 pm - 2:01 am
MKE
-
SJU
29h 27m
1 stop
Frontier Logo
3:21 am - 11:26 am
SJU
-
MKE
9h 05m
1 stop
$297Frontier
Wed, Apr 15 - Tue, Apr 21
United Airlines Logo
12:13 pm - 11:50 pm
MKE
-
SJU
10h 37m
2 stops
United Airlines Logo
1:00 am - 10:00 am
SJU
-
MKE
10h 00m
2 stops
$299United 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.

How much is a round-trip flight from Milwaukee to San Juan Luis Munoz Marin Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Milwaukee to San Juan Luis Munoz Marin Intl Airport departing in April.

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 $657 and $519 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$101
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly with an average 2% 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 $101 for a one-way ticket and $266 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, oneworld, and SkyTeam 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 $494 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 $381 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 4301 reviews
8.6Crew
7.0Food
8.0Comfort
7.5Entertainment
8.1Boarding
Airline reviews

It was canceled. Supposedly weather. But there was no snow in Baltimore. At least we found out before driving to airport

2.0 MediocreAnonymous, Feb 2026
BWI - PBI
Read more Southwest reviews

It was canceled. Supposedly weather. But there was no snow in Baltimore. At least we found out before driving to airport

I have not flown Southwest in awhile and had a very pleasant experience. From ticketing to boarding to the flight. The flight left on time and landed ahead of schedule. It won't be so long next time!!

The Southwest experience has definitely taken a dive from its early days. You can no longer deferentiate from other airlines. Air travel is too expensive. Southwest is no longer budget friendly. They have lost me as a loyal customer.

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

The WiFi and crew on the plane were good, however, the boarding experience was awful. I paid for the Choice Preferred and was boarded in group 5 so all overhead storage was full. They found room for our luggage, but further back making getting off the plane a nightmare. Also, we were in row 6 and the seats were extremely uncomfortable. Both my daughter and I had no leg room and couldn’t wait to get off the plane.

The charges were ridiculous for an hour flight and the turbulence was very scary.

Still need to work out the kinks on the new assigned seating boarding process. Otherwise, a very good flight.

WiFi did not work. Boarding with the new seating assignments took too long. The temperature in the terminal was obnoxious. +/- 80°

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The staff was fine. The plane was extremely tight, and I paid for the wifi and it did not work at all. I was actually going to ask for a refund.

two hour delay and the Delta representative on the PA system was unable to understand

An awesome flight crew. FC seat cushion just doesn’t cut it for a 3+ hour flight.

2+hrs delay without any reason provided and a cramped flight

We waited an hour on the runway to get a gate in Orlando

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

Flight was delayed due to crew being not on time

Flight crew issues delayed my flight by 2 1/2 hours. Causing me to miss my connection.

The staff on board and gate was nice - a welcome change from the usual. We also arrived early, which was a great benefit, given that it takes 30 minutes plus to get bags at SRQ.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Terrible because it was cancelled due to volcanic ash clouds in Guatemala while all other airlines kept flying. Had to pay for a hotel to stay overnight in Houston and try to fly next day.

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

Flight left on time and we arrived 25 minutes early! There was a gate available when we arrived so early on a busy Sunday afternoon! Flight attendants came around twice with the drinks cart.

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

Flight on time. Excellent service in Premium Economy. Great food served and cleaned up promptly. Unfortunately the climate control was malfunctioning and it was very cold and felt a bit like camping. Cold helps with sleep though so not complaining too much. Slept well. It asks to rate "entertainment". I do not like any IFE, don't shove a big screen in my face—I have my own phone if I want it. So this will always get low ratings.

We had turbulence ever 1/2 hr or so and the captains announcements were SOOOO LOUD

Everything was great except for the boarding process. Everyone is lining up all at the same time and it’s hard to tell between the groups as they are way too large.

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

For my arriving destination, we were delayed multiple times to the point that we arrived 6 hours after we were originally scheduled. On my flight home, they overbooked and involuntarily removed passengers (including me) from the plane. It was not a good experience.

It was good experience this time. The flight was on time.

I very rarely fly American and my experience today reenforces that is the correct decision. While the staff were all very courteous, our flight was first thing in the morning so there was no reason to be delayed, yet appropriate maintenance checks weren’t completed prior to our flight so we were delayed multiple times. Not a great showing, American Airlines.

It's very confusing because Kayak has it as American Airlines, but it was Hawaiian Airlines, but operated by Alaska Airlines. I had to go to the airport for my boarding pass because American said I didn't have any trips.

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Lack of gluten free options in food service. I have Celiac disease and it appears you no longer offer special meals for people with dietary restrictions. I am a frequent flyer traveling into and out of Omaha airport. I have noticed over the course of several months that although our flight typically arrives ahead of schedule (awesome job AA!) - we typically sit on the runway for several minutes waiting for the ground crew to get in place. Not sure if it is a ground crew issue or a gate availability issue (due to construction at this airport). Seems to be more of a ground crew being on time issue.

Arrived early picked up my bag in a few minutes- great trip - thank you

Flight boarded, departed and landed on time. Excellent service from flight attendant in FIRST

Boarding is always an ordeal. Less dogs on flights. I am highly allergic to dogs and cats. Why are there so many animals these days?

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.

There was no food and no entertainment, so I'm not sure why these are even in the survey, as my understanding is frontier does not ever offer food without a few, not even a snack, and there are no screens so unless the flight safety talk is our entertainment why ask how we liked it?. One of the flight attendants say in the back of the plane as people filed in to their seats, yelling orders about where to put baggage and telling people to hurry up. It was the least professional experience I've ever had on a flight.

Very well recently! Frontier is improving and less harrassing customer on luggages! Positive!

Good for a budget airline! It was easy to get on, staff was really nice. Can’t say anything about the food or entertainment because it wasn’t available, which is fine.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

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

Information on your arrival and departure airports