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Luis Munoz Marin Intl

$128+ Cheap flights from Milwaukee (MKE) to Luis Munoz Marin Intl (SJU)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — SJU
Jun 5 — Jun 121
Fri 6/5
Fri 6/12
1 adult, Economy
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Cheap flight deals from Milwaukee to Luis Munoz Marin Intl

Cheapest flights from Milwaukee to Luis Munoz Marin Intl
Explore the most affordable flight options available from Milwaukee to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 6, 2026.

This Priceline deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/258:53 am
MKE
-
SJU
1 stop27h 23m
Frontier
Mon 6/296:00 am
SJU
-
MKE
1 stop26h 58m
Frontier
Deal found 5/4$321
This Delta deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/175:45 am
MKE
-
SJU
1 stop9h 48m
Delta
Tue 11/37:30 am
SJU
-
MKE
1 stop8h 14m
Delta
Deal found 5/4$326
This American Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:16 am
MKE
-
SJU
2 stops11h 08m
American Airlines
Tue 8/186:51 am
SJU
-
MKE
1 stop17h 32m
American Airlines
Deal found 5/5$331
This American Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:00 am
MKE
-
SJU
1 stop16h 01m
American Airlines
Sat 6/66:21 am
SJU
-
MKE
1 stop18h 26m
American Airlines
Deal found 5/1$332
This American Airlines deal was found by Cheapflights users on 5/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:33 am
MKE
-
SJU
2 stops13h 41m
American Airlines
Sat 8/226:00 am
SJU
-
MKE
2 stops12h 00m
American Airlines
Deal found 5/4$333
This CheapOair deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/258:53 am
MKE
-
SJU
1 stop27h 23m
Frontier
Wed 7/154:05 pm
SJU
-
MKE
1 stop16h 53m
Frontier
Deal found 5/5$340
This CheapOair deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/218:46 am
MKE
-
SJU
1 stop16h 22m
Frontier
Sun 5/243:03 am
SJU
-
MKE
1 stop29h 58m
Frontier
Deal found 5/2$351
This Priceline deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/168:43 am
MKE
-
SJU
1 stop7h 53m
Frontier
Mon 7/209:24 am
SJU
-
MKE
1 stop23h 34m
Frontier
Deal found 5/6$361
This Southwest deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1011:00 am
MKE
-
SJU
1 stop11h 05m
Southwest
Thu 8/136:30 am
SJU
-
MKE
2 stops9h 55m
Southwest
Deal found 5/3$362
This Southwest deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/299:25 am
MKE
-
SJU
1 stop13h 20m
Southwest
Wed 8/55:15 am
SJU
-
MKE
1 stop6h 40m
Southwest
Deal found 5/6$365
This American Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/176:16 am
MKE
-
SJU
1 stop15h 08m
American Airlines
Fri 8/211:38 pm
SJU
-
MKE
2 stops10h 21m
American Airlines
Deal found 5/5$366
This American Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:16 am
MKE
-
SJU
1 stop15h 08m
American Airlines
Sun 9/66:51 am
SJU
-
MKE
1 stop17h 32m
American Airlines
Deal found 5/1$367

Find flight deals from Milwaukee to Luis Munoz Marin Intl

Discover tips and strategies to find the most affordable flight options for your journey from Milwaukee (MKE) to Luis Munoz Marin Intl (SJU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 6, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$321
(Priceline)

One-way from

$128
(Priceline)

Popular in

December

Cheapest in

September

Average price

$413
Provider with most accurate pricing for Milwaukee-Mitchell-San Juan Luis Munoz Marin Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Milwaukee-Mitchell-San Juan Luis Munoz Marin Intl flights.
Search Deals
From Milwaukee-Mitchell to San Juan Luis Munoz Marin Intl
Search Deals
One-way flight from Milwaukee-Mitchell to San Juan Luis Munoz Marin Intl
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($21 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Milwaukee to Luis Munoz Marin Intl 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, Cheapflights users made 2,558,603 searches. Data last updated May 6, 2026.
Use the filters below to find and compare flights from Milwaukee to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Fri 8/21

1:55 pm-10:15 pm

1 stop7h 20m

San Juan Luis Munoz Marin Intl

Sun 8/23

5:30 am-12:10 pm

1 stop7h 40m

$326

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Sun 7/26

1:35 pm-12:25 am

1 stop9h 50m

San Juan Luis Munoz Marin Intl

Sun 8/2

6:05 am-5:45 pm

1 stop12h 40m

$404

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Sat 7/11

9:50 am-11:00 pm

1 stop12h 10m

San Juan Luis Munoz Marin Intl

Thu 7/16

7:00 am-6:50 pm

1 stop12h 50m

$404

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Fri 8/14

5:45 am-4:55 pm

2 stops10h 10m

San Juan Luis Munoz Marin Intl

Sun 8/16

9:25 pm-8:55 am

1 stop12h 30m

$423

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Mon 6/22

8:15 pm-9:00 am

1 stop11h 45m

San Juan Luis Munoz Marin Intl

Thu 7/16

7:00 am-6:50 pm

1 stop12h 50m

$448

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Thu 8/27

5:45 am-4:55 pm

2 stops10h 10m

San Juan Luis Munoz Marin Intl

Sun 8/30

5:00 am-12:10 pm

2 stops8h 10m

$470

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Fri 7/17

3:15 pm-11:35 pm

1 stop7h 20m

San Juan Luis Munoz Marin Intl

Tue 7/21

8:35 pm-8:50 am

1 stop13h 15m

$470

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Fri 7/17

8:15 pm-10:30 am

1 stop13h 15m

San Juan Luis Munoz Marin Intl

Mon 7/20

10:20 pm-8:50 am

1 stop11h 30m

$488

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Wed 9/16

12:20 pm-10:00 pm

1 stop8h 40m

San Juan Luis Munoz Marin Intl

Sun 9/20

2:26 pm-9:59 pm

1 stop8h 33m

$516
Cheapest one-way

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Wed 10/28

5:45 am-4:33 pm

1 stop9h 48m

$163

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/5

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from Milwaukee to Luis Munoz Marin Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Milwaukee to Luis Munoz Marin Intl in May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Milwaukee-San Juan Luis Munoz Marin Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Milwaukee-San Juan Luis Munoz Marin Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Milwaukee-San Juan Luis Munoz Marin Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Milwaukee-San Juan Luis Munoz Marin Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Milwaukee-San Juan Luis Munoz Marin Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Milwaukee to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from Milwaukee with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Milwaukee to San Juan Luis Munoz Marin Intl Airport

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

The price you pay for your flight from Milwaukee to San Juan Luis Munoz Marin Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 42 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, September is the cheapest month in which you can book a flight from Milwaukee to San Juan Luis Munoz Marin Intl Airport (average of $315). Flying from Milwaukee to San Juan Luis Munoz Marin Intl Airport in December is currently the most expensive (average of $674). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Milwaukee to San Juan Luis Munoz Marin Intl Airport?

Reviews of airlines servicing Luis Munoz Marin Intl

Get insights into the airlines that provide service to Luis Munoz Marin Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Luis Munoz Marin Intl. Reviews last updated May 6, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Milwaukee to San Juan Luis Munoz Marin Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,305 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
7.9
Good
4,305 reviews
Southwest
7.9
Good
4,305 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,458 reviews
Southwest
7.9
Good
4,305 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,684 reviews
Southwest
7.9
Good
4,305 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,666 reviews
Southwest
7.9
Good
4,305 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.6
Fair
2,964 reviews
Southwest
7.9
Good
4,305 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

7.9

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Milwaukee to Luis Munoz Marin Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Milwaukee to San Juan Luis Munoz Marin Intl?

    For a flight from Milwaukee to San Juan Luis Munoz Marin Intl, you will be flying from Milwaukee-Mitchell. Milwaukee-Mitchell (MKE) is just 6.4 mi from the center of the city. Milwaukee-Mitchell is the only Milwaukee airport and it handles 0 outbound flights to San Juan Luis Munoz Marin Intl per day. 6 airlines have flights to San Juan Luis Munoz Marin Intl from Milwaukee-Mitchell on a regular basis.

  • How long is the flight from Milwaukee to San Juan Luis Munoz Marin Intl Airport?

    Airlines like Southwest fly from Milwaukee to San Juan Luis Munoz Marin Intl Airport in about 7h 20m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 2120 mi.

  • What are the cheapest airlines flying from Milwaukee to San Juan Luis Munoz Marin Intl Airport round-trip?

    Flying on Delta is currently your cheapest option to San Juan Luis Munoz Marin Intl Airport, with prices starting at $112. Additional round-trip tickets that might be worth considering are offered by Frontier and United Airlines, with the lowest prices starting at $156 and $202, respectively. Delta is priced at 74% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Milwaukee to San Juan Luis Munoz Marin Intl Airport one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $90. However, be on the lookout for offers from Southwest and American Airlines, as they are both options that can get you from Milwaukee to San Juan Luis Munoz Marin Intl Airport for a low price.

  • Can I find deals for flights from Milwaukee to Luis Munoz Marin Intl that include hotel bookings?

    Yes. In addition to deals on Milwaukee to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Milwaukee to Luis Munoz Marin Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Milwaukee to Luis Munoz Marin Intl.

  • Can I find deals for business class flights from Milwaukee to Luis Munoz Marin Intl?

    Yes. Cheapflights offers flight deals from Milwaukee to Luis Munoz Marin Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, September is the cheapest month in which you can book a flight from Milwaukee to San Juan Luis Munoz Marin Intl Airport (average of $315). Flying from Milwaukee to San Juan Luis Munoz Marin Intl Airport in December is currently the most expensive (average of $674). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Juan Luis Munoz Marin Intl Airport?

Book flights to San Juan Luis Munoz Marin Intl Airport if you plan to visit one of these locations
Fajardo
Luquillo
Rio Grande
Dorado
Humacao
Bayamón

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Alternative routes for Milwaukee to Luis Munoz Marin Intl

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Luis Munoz Marin Intl flights
Minneapolis to Luis Munoz Marin Intl flights
Madison to Luis Munoz Marin Intl flights
Appleton to Luis Munoz Marin Intl flights
Wausau to Luis Munoz Marin Intl flights

Top 6 airlines flying from Milwaukee to Luis Munoz Marin Intl

Discover the top 6 airlines that operate flights from Milwaukee to Luis Munoz Marin Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$112Average$375FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$156Average$360FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$202Average$422FlexibilityNo cancel feeOn-time69%
Spirit AirlinesCheapest$219Average$366FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$256Average$485FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$315Average$480FlexibilityNo cancel feeOn-time63%

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