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San Juan

$118+ Cheap flights from Milwaukee (MKE) to San Juan

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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — SJU
oct. 29 — nov. 51
mié. 10/29
mié. 11/5
1 adult, Economy
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Cheapflights Tip: The best prices from Milwaukee-Mitchell to San Juan 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 San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Milwaukee (MKE) to San Juan (PR1). 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 septiembre 29, 2025.

Round-trip from

$235
(Delta)

One-way from

$118
(Southwest)

Popular in

June

Cheapest in

September

Average price

$317
From Milwaukee-Mitchell to San Juan
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One-way flight from Milwaukee-Mitchell to San Juan
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Highest demand for flights based on searches. 9% potential increase in price ($46 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 September 2025
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Find flight deals from Milwaukee to San Juan

Cheapest flights from Milwaukee to San Juan
Explore the most affordable flight options available from Milwaukee to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 29, 2025.

This Delta deal was found by Cheapflights users on 9/29. 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.
dom. 12/710:25 amMKE - SJU
1 stop10h 55mDelta
mié. 12/106:38 pmSJU - MKE
1 stop7h 17mDelta
Deal found 9/29$235
This United Airlines deal was found by Cheapflights users on 9/28. 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.
jue. 10/3012:05 pmMKE - SJU
1 stop6h 55mUnited Airlines
mié. 11/128:10 amSJU - MKE
1 stop8h 57mUnited Airlines
Deal found 9/28$252
This United Airlines deal was found by Cheapflights users on 9/28. 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.
mar. 10/286:05 amMKE - SJU
1 stop7h 35mUnited Airlines
lun. 11/32:05 amSJU - MKE
2 stops11h 24mUnited Airlines
Deal found 9/28$253
This United Airlines deal was found by Cheapflights users on 9/27. 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.
mar. 12/26:00 amMKE - SJU
1 stop7h 40mUnited Airlines
lun. 12/152:05 amSJU - MKE
2 stops11h 24mUnited Airlines
Deal found 9/27$266
This United Airlines deal was found by Cheapflights users on 9/27. 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.
lun. 10/276:05 amMKE - SJU
1 stop7h 35mUnited Airlines
lun. 11/34:52 pmSJU - MKE
1 stop7h 51mUnited Airlines
Deal found 9/27$272
This United Airlines deal was found by Cheapflights users on 9/28. 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.
dom. 12/712:04 pmMKE - SJU
1 stop6h 56mUnited Airlines
jue. 12/112:05 amSJU - MKE
2 stops13h 39mUnited Airlines
Deal found 9/28$295
This Delta deal was found by Cheapflights users on 9/29. 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.
lun. 12/85:45 amMKE - SJU
1 stop6h 29mDelta
mar. 12/93:32 pmSJU - MKE
1 stop10h 23mDelta
Deal found 9/29$300
This United Airlines deal was found by Cheapflights users on 9/27. 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.
mar. 12/25:00 amMKE - SJU
1 stop8h 40mUnited Airlines
mar. 12/92:05 amSJU - MKE
1 stop10h 39mUnited Airlines
Deal found 9/27$304
This United Airlines deal was found by Cheapflights users on 9/28. 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.
mar. 10/2812:04 pmMKE - SJU
1 stop6h 56mUnited Airlines
mar. 11/112:05 amSJU - MKE
1 stop10h 14mUnited Airlines
Deal found 9/28$305
This Frontier deal was found by Cheapflights users on 9/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/57:48 pmMKE - SJU
1 stop12h 07mFrontier
lun. 12/811:05 amSJU - MKE
1 stop9h 48mFrontier
Deal found 9/27$312
This Delta deal was found by Cheapflights users on 9/28. 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.
sáb. 12/67:05 amMKE - SJU
1 stop8h 15mDelta
mar. 12/163:32 pmSJU - MKE
1 stop10h 23mDelta
Deal found 9/28$317

Cheapflights Fare Finder

 
Customize your flight search to find flights from Milwaukee to San Juan 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 septiembre 29, 2025.
Use the filters below to find and compare flights from Milwaukee to San Juan that are best for you.

Fly from

Milwaukee

Fly to

San Juan

Route

Depart

Return

Price

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

mar. 12/9

10:25 am-11:20 pm

1 stop10h 55m

San Juan Luis Munoz Marin Intl

mié. 12/17

6:38 pm-11:55 pm

1 stop7h 17m

$235

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

mar. 10/28

6:05 am-2:40 pm

1 stop7h 35m

San Juan Luis Munoz Marin Intl

mar. 11/4

8:30 am-5:17 pm

2 stops10h 47m

$235

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

sáb. 10/25

10:22 am-9:59 pm

1 stop10h 37m

San Juan Luis Munoz Marin Intl

mié. 11/12

6:36 pm-11:55 pm

1 stop7h 19m

$235

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

dom. 12/7

10:25 am-11:20 pm

1 stop10h 55m

San Juan Luis Munoz Marin Intl

mié. 12/10

6:38 pm-11:55 pm

1 stop7h 17m

$235

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

mar. 2/3

5:00 am-3:40 pm

1 stop8h 40m

San Juan Luis Munoz Marin Intl

lun. 2/9

2:05 am-12:09 pm

2 stops12h 04m

$299

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

mié. 12/10

5:45 am-2:14 pm

1 stop6h 29m

San Juan Luis Munoz Marin Intl

sáb. 12/13

6:38 pm-11:40 pm

1 stop7h 02m

$317

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

dom. 10/26

12:06 pm-9:59 pm

1 stop8h 53m

San Juan Luis Munoz Marin Intl

lun. 11/10

1:57 pm-11:55 pm

1 stop11h 58m

$317

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

mar. 3/10

10:45 am-7:55 pm

1 stop8h 10m

San Juan Luis Munoz Marin Intl

mié. 3/11

7:35 am-1:43 pm

1 stop7h 08m

$320

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

mar. 12/9

12:04 pm-9:00 pm

1 stop6h 56m

San Juan Luis Munoz Marin Intl

mié. 12/10

8:30 am-9:47 pm

2 stops15h 17m

$320

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

sáb. 11/15

6:44 pm-10:17 am

2 stops13h 33m

$118

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/28

Showing 1-10 of 21 results
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Best time to book a flight from Milwaukee to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan 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

How far ahead should I book a flight from Milwaukee to San Juan?

Use this chart to determine the optimal time to book a round-trip flight from Milwaukee to San Juan. Price data was last updated on September 26, 2025.

To ensure you get the cheapest price possible for a flight from Milwaukee to San Juan, you should look to book at least 82 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Milwaukee to San Juan?

Currently, September is the cheapest month in which you can book a flight from Milwaukee to San Juan (average of $254). Flying from Milwaukee to San Juan 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 San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 29, 2025.

When flying from Milwaukee to San Juan, 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?

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

Travelers seeking maximum savings on their Milwaukee to San Juan 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 San Juan

Get insights into the airlines that provide service to San Juan. 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 San Juan. Reviews last updated septiembre 29, 2025.
Read through reviews of airlines operating flights from Milwaukee to San Juan, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,964 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,924 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,157 reviews
Southwest
8.0
Very good
4,246 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Food

7.0

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Milwaukee to San Juan. 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?

    If you book a flight to San Juan from Milwaukee, you will be flying from Milwaukee-Mitchell, which is the city’s only airport. Milwaukee-Mitchell (MKE) is located 6.4 mi from the center of Milwaukee. There are 0 flights from Milwaukee-Mitchell to San Juan per day from 6 different airlines.

  • How long is the flight from Milwaukee to San Juan?

    For as low as $235, Delta can have you in San Juan from Milwaukee in 7h 35m. Milwaukee and San Juan are separated by a distance of 2120 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Milwaukee to San Juan round-trip?

    Cheapflights users have booked flights from Milwaukee to San Juan round-trip from $129. Other airlines that can offer you cheap pricing are United Airlines, from $215, and Delta, from $215. Frontier is priced at 70% 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 one-way?

    $118 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on United Airlines and Delta, with prices starting from $118 and $118, respectively.

  • Where are the most common layover locations when flying from Milwaukee to San Juan?

    Flights departing from Milwaukee and landing in San Juan layover in Atlanta most frequently.

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

    Georgia Aquarium, Tabernacle, and Fox Theatre are the most popular attractions in Atlanta if you're in need of something to do during your layover. Travelers on a layover in Atlanta can visit Georgia Aquarium, Tabernacle, and Fox Theatre, by traveling 8.6 mi, 8.3 mi, and 9.3 mi, respectively after landing at Atlanta Hartsfield-Jackson. Travelers can book a car rental at Atlanta Hartsfield-Jackson for about $54 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Milwaukee to San Juan flights?

    Milwaukee to San Juan flights that have layovers will least frequently stop in Charlotte.

  • Can I find deals for flights from Milwaukee to San Juan that include hotel bookings?

    Yes. In addition to deals on Milwaukee to San Juan flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Milwaukee to San Juan?

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

  • Can I find deals for business class flights from Milwaukee to San Juan?

    Yes. Cheapflights offers flight deals from Milwaukee to San Juan 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?

    Currently, September is the cheapest month in which you can book a flight from Milwaukee to San Juan (average of $254). Flying from Milwaukee to San Juan 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

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Alternative routes for Milwaukee to San Juan

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Milwaukee to San Juan

Discover the top 6 airlines that operate flights from Milwaukee to San Juan. 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 septiembre 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$129Average$233FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$215Average$399FlexibilityNo cancel feeOn-time69%
DeltaCheapest$215Average$391FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$226Average$404FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$275Average$493FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$315Average$600FlexibilityNo cancel feeOn-time63%

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