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Luis Munoz Marin Intl

$108+ 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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — SJU
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheapflights Tip: The best prices from Milwaukee-Mitchell to San Juan Luis Munoz Marin Intl are usually found in September or October, booked 82 days in advance, depart on a Tuesday or Monday and return on a Thursday

Cheap 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 August 20, 2025.

Round-trip from

$215
(American Airlines)

One-way from

$108
(Delta)

Popular in

June

Cheapest in

September

Average price

$399
From Milwaukee-Mitchell to San Juan Luis Munoz Marin Intl
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One-way flight from Milwaukee-Mitchell to San Juan Luis Munoz Marin Intl
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Highest demand for flights based on searches. 9% potential increase in price ($47 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 20, 2025.

This American Airlines deal was found by Cheapflights users on 8/18. 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.
Fri 10/241:43 pmMKE - SJU
1 stop9h 16mAmerican Airlines
Thu 10/307:45 amSJU - MKE
1 stop16h 31mAmerican Airlines
Deal found 8/18$215
This American Airlines deal was found by Cheapflights users on 8/19. 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 9/172:45 pmMKE - SJU
2 stops21h 02mAmerican Airlines
Sat 9/204:45 pmSJU - MKE
1 stop7h 15mAmerican Airlines
Deal found 8/19$245
This American Airlines deal was found by Cheapflights users on 8/20. 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 9/296:23 pmMKE - SJU
2 stops17h 24mAmerican Airlines
Thu 10/97:10 amSJU - MKE
1 stop18h 04mAmerican Airlines
Deal found 8/20$250
This American Airlines deal was found by Cheapflights users on 8/18. 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.
Fri 9/265:46 pmMKE - SJU
1 stop19h 29mAmerican Airlines
Thu 10/21:37 pmSJU - MKE
2 stops11h 32mAmerican Airlines
Deal found 8/18$252
This Southwest deal was found by Cheapflights users on 8/20. 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 9/176:05 amMKE - SJU
1 stop10h 20mSouthwest
Wed 9/243:05 pmSJU - MKE
1 stop7h 45mSouthwest
Deal found 8/20$265
This Delta deal was found by Cheapflights users on 8/20. 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.
Mon 9/297:20 amMKE - SJU
1 stop8h 00mDelta
Thu 10/95:43 pmSJU - MKE
1 stop7h 12mDelta
Deal found 8/20$274
This American Airlines deal was found by Cheapflights users on 8/19. 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.
Sun 9/216:00 amMKE - SJU
2 stops16h 37mAmerican Airlines
Wed 9/244:43 pmSJU - MKE
1 stop7h 17mAmerican Airlines
Deal found 8/19$275
This Southwest deal was found by Cheapflights users on 8/18. 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.
Sun 9/75:30 amMKE - SJU
2 stops9h 50mSouthwest
Fri 9/125:50 amSJU - MKE
1 stop10h 55mSouthwest
Deal found 8/18$297
This Priceline deal was found by Cheapflights users on 8/19. 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.
Sun 12/710:19 amMKE - SJU
1 stop8h 08mMultiple Airlines
Thu 12/112:59 amSJU - MKE
1 stop11h 52mMultiple Airlines
Deal found 8/19$299
This United Airlines deal was found by Cheapflights users on 8/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1510:53 amMKE - SJU
2 stops11h 43mUnited Airlines
Tue 11/188:30 amSJU - MKE
2 stops10h 47mUnited Airlines
Deal found 8/18$305

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 August 20, 2025.
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

Milwaukee

Fly to

Luis Munoz Marin Intl

Route

Depart

Return

Price

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Sat 1/24

11:47 am-11:40 pm

1 stop9h 53m

San Juan Luis Munoz Marin Intl

Fri 1/30

4:40 pm-9:25 pm

1 stop6h 45m

$215

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Sat 10/11

6:00 am-2:11 pm

1 stop7h 11m

San Juan Luis Munoz Marin Intl

Sat 10/18

5:43 pm-11:55 pm

1 stop7h 12m

$215

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Fri 10/24

1:43 pm-11:59 pm

1 stop9h 16m

San Juan Luis Munoz Marin Intl

Thu 10/30

7:45 am-11:16 pm

1 stop16h 31m

$215

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Wed 10/15

6:00 am-11:59 pm

1 stop16h 59m

San Juan Luis Munoz Marin Intl

Thu 10/23

7:10 am-12:14 am

1 stop18h 04m

$215

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Tue 9/16

2:45 pm-12:47 pm

2 stops21h 02m

San Juan Luis Munoz Marin Intl

Tue 9/23

6:10 am-11:43 pm

2 stops18h 33m

$215

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Sun 1/11

1:14 pm-9:55 pm

1 stop6h 41m

San Juan Luis Munoz Marin Intl

Thu 1/15

6:45 am-4:48 pm

1 stop12h 03m

$215

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Mon 9/22

7:00 am-3:10 pm

1 stop7h 10m

$108

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Tue 9/23

7:20 am-4:17 pm

1 stop7h 57m

$108

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Mon 9/22

8:00 am-3:52 pm

1 stop6h 52m

$108

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Sat 1/24

5:21 pm-6:12 am

2 stops10h 51m

$108

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/19

Showing 1-10 of 14 results
1
2

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?

Use this chart to determine the optimal time to book a round-trip flight from Milwaukee to Luis Munoz Marin Intl. Price data was last updated on August 8, 2025.

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 82 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 $254). Flying from Milwaukee to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $339). 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.

What is the cheapest time of day to fly from MKE to SJU?

Find hourly flight availability from Milwaukee to Luis Munoz Marin Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2025.

When flying from Milwaukee to San Juan Luis Munoz Marin Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 22% versus a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Milwaukee to Luis Munoz Marin Intl. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Milwaukee to San Juan Luis Munoz Marin Intl Airport flight should consider departing on Wednesday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 August 20, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United 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
8.0
Very good
4,246 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,982 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,928 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Spirit Airlines
6.3
Okay
8,039 reviews
Southwest
8.0
Very good
4,246 reviews

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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 American Airlines fly from Milwaukee to San Juan Luis Munoz Marin Intl Airport in about 9h 53m. 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 Frontier is currently your cheapest option to San Juan Luis Munoz Marin Intl Airport, with prices starting at $129. Additional round-trip tickets that might be worth considering are offered by United Airlines and Spirit Airlines, with the lowest prices starting at $202 and $208, respectively. Frontier is priced at 70% lower than the current average price of a flight leaving 3 months from now.

  • Where are the most common layover locations when flying from Milwaukee to San Juan Luis Munoz Marin Intl Airport?

    Most of the time, Milwaukee to San Juan Luis Munoz Marin Intl Airport flights that have layovers will stop in Atlanta.

  • What are some popular things to do or see while on a layover in Atlanta?

    Atlanta travelers tend to visit Georgia Aquarium, Fox Theatre, and Tabernacle more than anywhere else. Travelers on a layover in Atlanta can visit Georgia Aquarium, Fox Theatre, and Tabernacle, by traveling 8.6 mi, 9.3 mi, and 8.3 mi, respectively after landing at Atlanta Hartsfield-Jackson. Travelers in need of a car in Atlanta can rent one for about $55 per day.

  • Where are the least popular layover locations for Milwaukee to San Juan Luis Munoz Marin Intl Airport flights?

    The least popular layover on flights from Milwaukee to San Juan Luis Munoz Marin Intl Airport is Charlotte.

  • 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 $254). Flying from Milwaukee to San Juan Luis Munoz Marin Intl Airport in June is currently the most expensive (average of $339). 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
Dorado
Fajardo
Rio Grande
Luquillo
Humacao

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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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$129Average$233FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$202Average$421FlexibilityNo cancel feeOn-time69%
Spirit AirlinesCheapest$208Average$402FlexibilityNo cancel feeOn-time65%
DeltaCheapest$223Average$392FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$275Average$485FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$322Average$604FlexibilityNo cancel feeOn-time63%

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