MKE - SJU

$163 Find Cheap Flights from Milwaukee to San Juan - Compare and Save

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 9/21. 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

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Everything you should know

Cheapest round-trip
$326
Typical prices: $245-$412
Delta
Sat 9/19Mon 10/5
MKE - SJU • 1 stop
Cheapest one-way
$163
Typical prices: $108-$200
Delta
Mon 9/21
MKE - SJU • 1 stop
Top airlines
Cheapest • from $326 (round-trip)
Best reviews • 7.9 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 • 32% price drop
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

Sat, Sep 19 - Mon, Oct 5
Delta Logo
7:05 am - 4:49 pm
MKE
-
SJU
8h 44m
1 stop
Delta Logo
12:56 pm - 8:55 pm
SJU
-
MKE
8h 59m
1 stop
$326Delta
Wed, Sep 2 - Sun, Sep 6
American Airlines Logo
8:20 am - 11:15 pm
MKE
-
SJU
13h 55m
1 stop
American Airlines Logo
6:00 am - 5:00 pm
SJU
-
MKE
12h 00m
2 stops
$331American Airlines
Mon, Oct 5 - Fri, Oct 30
American Airlines Logo
6:27 pm - 11:31 am
MKE
-
SJU
16h 04m
2 stops
American Airlines Logo
12:13 pm - 11:18 pm
SJU
-
MKE
12h 05m
2 stops
$332American Airlines
Mon, Oct 5 - Fri, Oct 30
American Airlines Logo
6:27 pm - 11:31 am
MKE
-
SJU
16h 04m
2 stops
American Airlines Logo
6:00 am - 9:49 pm
SJU
-
MKE
16h 49m
1 stop
$333American Airlines
Wed, Sep 2 - Mon, Sep 7
American Airlines Logo
5:00 am - 11:15 pm
MKE
-
SJU
17h 15m
1 stop
American Airlines Logo
7:03 am - 9:06 pm
SJU
-
MKE
15h 03m
1 stop
$337American Airlines
Wed, Sep 16 - Sun, Sep 20
American Airlines Logo
8:14 pm - 2:50 pm
MKE
-
SJU
17h 36m
2 stops
American Airlines Logo
6:27 am - 8:29 pm
SJU
-
MKE
15h 02m
2 stops
$338American Airlines
Wed, Sep 30 - Mon, Oct 5
Southwest Logo
6:40 am - 6:10 pm
MKE
-
SJU
10h 30m
2 stops
Southwest Logo
9:45 pm - 8:55 am
SJU
-
MKE
12h 10m
1 stop
$345Southwest
Mon, Aug 24 - Fri, Sep 4
American Airlines Logo
6:20 am - 6:30 pm
MKE
-
SJU
11h 10m
2 stops
American Airlines Logo
12:55 am - 12:47 pm
SJU
-
MKE
12h 52m
1 stop
$351American Airlines
Sat, Sep 19 - Sun, Oct 4
United Airlines Logo
10:30 am - 11:50 pm
MKE
-
SJU
12h 20m
2 stops
United Airlines Logo
3:56 pm - 10:59 pm
SJU
-
MKE
8h 03m
1 stop
$354United Airlines
Wed, Aug 19 - Fri, Sep 4
American Airlines Logo
5:00 am - 4:11 pm
MKE
-
SJU
10h 11m
2 stops
American Airlines Logo
12:55 am - 2:12 pm
SJU
-
MKE
14h 17m
1 stop
$356American 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 September.

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 October, where tickets cost $317 (return) on average. On the other hand, the most expensive months are December and November, where the average cost of round-trip tickets is $718 and $545 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 13 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$163
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly with an average 8% 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 5 days, the lowest price for a flight from Milwaukee to San Juan Luis Munoz Marin Intl Airport was $163 for a one-way ticket and $326 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.

  • 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 $488 and an overall rating of 7.9, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $397 and an overall rating of 7.8.

  • 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.
7.9
SouthwestOverall score based on 4250 reviews
8.0Comfort
8.6Crew
8.1Boarding
7.5Entertainment
7.0Food
Airline reviews

My experience will Southwest was good. I wish there was more entertainment and the boarding process was slow at time but other than that my experience was great definitely will be flying with SouthWest again.

8.0 ExcellentAnonymous, Jul 2026
PHL - BNA
Read more Southwest reviews

My experience will Southwest was good. I wish there was more entertainment and the boarding process was slow at time but other than that my experience was great definitely will be flying with SouthWest again.

Flight was delayed by 2 hours, meaning that a flight to Dwnver which should have arrived at 11pm came into the airport at 1 am. Made for a very long day.

I think Southwest is the number one airline that anyone can fly I have flown for the first time Frontier and what a joke and their customer service United was a very strange experience I'm only sticking to Southwest from here on out for sure

Great job! My family doesnt fly often but we felt safe 100%

Great job Southwest! My family doesn't fly often but we felt safe the whole time.

SW can't get their wifi right. I upgrade to insure wifi service but the last two trips had intermittent service. Not worth the extra costs.

The flight was late. The crew was rude. There was no food. Cramped and uncomfortable. Nothing about this flight was good.

Crew was rude, flight was late, wifi didn't work, no food, basically nothing about this flight was good.

it was great. the crew is exceptional. the flight was on time.

We were headed for Florida and anxious to get there. Everything was absolutely the best. This is our first time with Southwest and it’s now our go to airline. Best ever.

It was good. The leg room was not great in Row 1.

Probably not the fault of Delta but there was delay after delay after delay and I ended up getting home 4 hours later then I should have at 1:30 in the morning

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

Very late arrival at PWM. Late jet getting to ATL. Equipment problem with aircraft - could not get enough water onto plane., Another delay getting FAA approval for flight with bottled H2O. Not the crew’s problem.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Pretty standard flight. Delta has a good selection of movies.

The flight was so late that I had to change connecting flights, turning a five-hour trip into a fourteen-hour nightmare.

When we checked in my friend and I were sitting seperate. By the time we got to boarding, they automatically switched our seats. I really liked that.

Despite being delayed, we would still give a high score for this flight experience. For the first time in quite some time we had excellent customer service throughout our entire round trip. The flight attendants were the most polite we have experienced in our last ten flights at least (non of which were Delta and include business class). The food offered was a better selection than most—we just didn’t have any of it. Overall, almost as good as flying used to be. Thank you to Delta.

I trust Delta. I travel comfortable. The snacks could improve or could go to something as a little sandwich.

The flight was delayed by a hour and I wish they had communicated it sooner. No issues on the plane, it did take a while for food to come.

Know that the movies that you are going to be offered are the oldest be rated movies they could possibly get. They may have one or two new movies that they keep advertising but when you’re flying 15 hours, there is nothing to see past the first new movie.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

My flight was completely full. Making me very stressful with people walking around all the time. I believe airlines can do better for entertain people during the flight.

The seats on the aircraft are like sitting in a rock. During the boarding process they recognize Active Duty Military, why don’t they recognize Retired Military. I’ve always preferred Delta, this flight confirmed why I still prefer Delta.

It was literally one of the worst travel experiences ever. My flight got delayed by over an hour and there was no communication of this from the gate staff. I realized it by checking the screen periodically. Once on board the flight attendants continued to serve alcohol to a man who was clearly already drunk and that was making a bunch of commotion. Never again will I fly United!

At least the delays were short. Business class, even in the new planes is very crowded now with crappy tray tables

All good except paid for wifi that did not work

Flight cancelled due to fog. No other flights available for 36 hours. Directed by United to book passage on another carrier, and submit receipts for reimbursement. Did that. United now states they will not reimburse. Currently out 2 grand.

The United website was easy to use and had all the information I needed. I needed to change my flight and it was accomplished easily on line. I was also easily able to upgrade and for a reasonable price. Boarding went smoothly and the flight was in time. The service was good in board but the crew did not seem happy at all. Limited availability of meals - not much choice for purchase and in business class they ran out of one of the meal choices by row 4. .

Delayed delayed. Poor professionalism. Our seats changed and we pay for them

Crew was helpful and cheerful especially when they had no refreshments to work with. The plane was never serviced and had nothing but limited water and coffee onboard. For the price point, a concern of services.

I bought wifi and most of the flight could not even use it my apps would just spin. I couldn't even listen to music. super frustrating.

The plane was broken so we had to change planes.

Uncomfortable seats and flight attendant was rude as she insisted on waking up my husband to ask him if he wanted a drink. When he said that he was sleeping, she replied “without an attitude “. He was seated at 8c

Seating was horrible. Small seats. Access to flight information and extras very iser unfriendly. Kept losing internet after paying for it. Staff in madison was as unprofessional and unhelpful.

Airlines must do something with overweight people... Maybe reserve a business class seat for them, or you could pay the consequences if someone overweight seat side by side to you in economy.

There were several different delays but we ended up being delayed a total of 40 mins or so. It was annoying we had a gate change which made it take longer to leave DFW, and we had to check our carry on. Ugh

We were told we had no flights before our flight was continually delayed then cancelled.

Iberia didn’t let me check in online or select my seats, the experience overall was not very pleasant

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.

The worst. They don’t follow procedure for boarding per group. Flight got delayed for no understandably reasons, they changed our destination from PR to Miami, left us inside a plane for more than 8 hours, then cancelled flight in Miami leaving us stranded. Poorly managed re-accommodation for a new flight and overnight stay so I have to spend in a new ticket and my own hotel room to been able to get to my office next day. Lost 2 days of work and as a doctor, patients loosing their appointments. to other flights and besides

Late, terrible communication, horrible planning of passenger seating until the literal last minute. One of the worst flying experiences of my life. Y'all suck

I liked the price of the flight and the chance to buy a seat with no person seated in the middle seat.. Also the flight was right on time.

The flight left over two hours late. They charged me $180 to bring a carry on. There was an error with the spelling of my name and Frontair agent lied that I would need to pay $200 for her to fix the spelling, and pressured me that if I don't do it quick I would lose the flight. I called back and another agent said it costs $75 to fix. All in all, this company is a complete scam.

I took my first and last flight with FRONTIER. The seats are not able to be reclined so it’s not a very comfortable experience when you take a flight of 3 hours or longer. You must pay for your luggage either carry on or check in, so taking all this in consideration at the end what you think you’re saving your paying in services that should be included. Not a beverage in sight. . You’re seriously better off getting on a proper airline such as Delta, AA, United, etc.

Horrible and worse flight ever. Was left at the airport in SJU by my flight to JFK after several delay at Santa Domingo. Will never recommend Frontier to any one. After leaving, frontier customer service ask me to rebook and pay for another flight to from SJU to JFK. Worse airline ever. You pay for everything with frontier airline.

Frontier notifying me earlier of flight delay of over 2 hours.

Both flights were delayed. The sizing of bags is crazy. I know it is advertised as a no frills cheaper option but it does feel like you are being extorted for money the whole way-- $20 dollars to talk to a gate agent? Charging for soda a pretzels? I don't think I will be flying Frontier again if I can help it. That said, all the staff were wonderful.

Excellent crew. WE all know Frontier its a low cost airline but the travel time was about 30 minutes and the crew was phenomenal. I was with a group of 10 more and we are enjoy our flight. The only issue was in SJU waiting for the luggage.

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

Information on your arrival and departure airports