San Juan

$116+ 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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — SJU
Jul 21 — Jul 281
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Cheap 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 June 21, 2026.

This deal was found by Cheapflights users on 6/16. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/138:10 pm
MKE
-
SJU
1 stop10h 48m
Frontier
Sun 10/49:03 am
SJU
-
MKE
1 stop11h 12m
Frontier
Deal found 6/16$187
This deal was found by Cheapflights users on 6/16. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/178:10 pm
MKE
-
SJU
1 stop10h 48m
Frontier
Thu 10/89:03 am
SJU
-
MKE
1 stop11h 12m
Frontier
Deal found 6/16$205
This Southwest deal was found by Cheapflights users on 6/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/232:10 pm
MKE
-
SJU
1 stop9h 20m
Southwest
Thu 8/276:00 am
SJU
-
MKE
1 stop11h 10m
Southwest
Deal found 6/19$226
This American Airlines deal was found by Cheapflights users on 6/20. 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 10/52:22 pm
MKE
-
SJU
1 stop8h 28m
American Airlines
Fri 10/308:35 am
SJU
-
MKE
1 stop16h 36m
American Airlines
Deal found 6/20$232
This deal was found by Cheapflights users on 6/20. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/298:03 pm
MKE
-
SJU
1 stop10h 55m
Frontier
Mon 11/210:03 am
SJU
-
MKE
1 stop11h 05m
Frontier
Deal found 6/20$243
This American Airlines deal was found by Cheapflights users on 6/21. 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.
Sat 8/226:35 am
MKE
-
SJU
1 stop16h 08m
American Airlines
Sun 8/307:30 am
SJU
-
MKE
1 stop17h 27m
American Airlines
Deal found 6/21$276
This American Airlines deal was found by Cheapflights users on 6/19. 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 9/22:49 pm
MKE
-
SJU
1 stop8h 10m
American Airlines
Sun 9/62:33 pm
SJU
-
MKE
1 stop7h 33m
American Airlines
Deal found 6/19$281
This American Airlines deal was found by Cheapflights users on 6/18. 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.
Thu 8/611:32 am
MKE
-
SJU
1 stop10h 43m
American Airlines
Fri 8/77:30 am
SJU
-
MKE
1 stop15h 17m
American Airlines
Deal found 6/18$291
This American Airlines deal was found by Cheapflights users on 6/20. 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.
Fri 8/2112:58 pm
MKE
-
SJU
1 stop8h 26m
American Airlines
Sun 8/306:00 am
SJU
-
MKE
2 stops18h 14m
American Airlines
Deal found 6/20$296
This American Airlines deal was found by Cheapflights users on 6/18. 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.
Wed 8/55:02 am
MKE
-
SJU
2 stops12h 32m
American Airlines
Fri 8/71:38 pm
SJU
-
MKE
2 stops10h 36m
American Airlines
Deal found 6/18$301
This American Airlines deal was found by Cheapflights users on 6/21. 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.
Sat 10/316:05 am
MKE
-
SJU
1 stop17h 00m
American Airlines
Sat 11/78:00 am
SJU
-
MKE
2 stops11h 43m
American Airlines
Deal found 6/21$316

Find 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 June 21, 2026.

Round-trip from

$187

One-way from

$116
(American Airlines)

Popular in

December

Cheapest in

October

Average price

$488
From Milwaukee-Mitchell to San Juan
One-way flight from Milwaukee-Mitchell to San Juan
Highest demand for flights based on searches. 18% potential increase in price ($100 potential increase over avg. RT price).
Cheapest flight prices on average. 5% potential price decrease ($24 potential savings vs. average RT price).
Average for round-trip flights in June 2026

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 June 21, 2026.
Use the filters below to find and compare flights from Milwaukee to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Wed 9/2

6:05 am-4:25 pm

1 stop9h 20m

San Juan Luis Munoz Marin Intl

Sun 9/6

6:00 am-12:40 pm

1 stop7h 40m

$316
Quickest round-trip

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Mon 9/21

5:30 am-1:16 pm

1 stop6h 46m

San Juan Luis Munoz Marin Intl

Sat 10/3

5:41 pm-11:52 pm

1 stop7h 11m

$326

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Sun 8/23

7:03 am-4:38 pm

1 stop8h 35m

San Juan Luis Munoz Marin Intl

Tue 8/25

5:49 pm-11:53 pm

1 stop7h 04m

$326

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Thu 9/17

11:00 am-11:05 pm

1 stop11h 05m

San Juan Luis Munoz Marin Intl

Mon 9/21

6:00 am-4:10 pm

1 stop11h 10m

$326

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Thu 9/24

1:55 pm-10:15 pm

1 stop7h 20m

San Juan Luis Munoz Marin Intl

Sun 9/27

5:30 am-12:10 pm

1 stop7h 40m

$336

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Sat 8/8

7:30 am-9:55 pm

1 stop13h 25m

San Juan Luis Munoz Marin Intl

Fri 9/11

6:30 am-3:25 pm

2 stops9h 55m

$341

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Wed 9/16

5:30 am-4:31 pm

1 stop10h 01m

San Juan Luis Munoz Marin Intl

Sun 9/20

12:58 pm-8:52 pm

1 stop8h 54m

$401

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Sun 9/6

5:00 am-2:44 pm

1 stop8h 44m

San Juan Luis Munoz Marin Intl

Wed 9/9

4:20 pm-11:37 pm

1 stop8h 17m

$416

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Wed 9/16

6:00 am-8:38 pm

2 stops13h 38m

San Juan Luis Munoz Marin Intl

Sat 9/19

1:00 am-10:00 am

2 stops10h 00m

$416
Cheapest one-way

MilwaukeeSan Juan

MKE - SJU

MKESJU

Milwaukee-Mitchell

Mon 9/21

5:30 am-4:31 pm

1 stop10h 01m

$163

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/18

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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

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

Currently, October is the cheapest month in which you can book a flight from Milwaukee to San Juan (average of $108). Flying from Milwaukee to San Juan in June is currently the most expensive (average of $326). 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?

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

To ensure you get the cheapest price possible for a flight from Milwaukee to San Juan, you should look to book at least 52 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.

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 June 21, 2026.
Read through reviews of airlines operating flights from Milwaukee to San Juan, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

7.9

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

7.9

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

7.9

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

7.9

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

7.9

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

Crew

8.6

Overall

7.9

Reviews

1 / 20
6.0
Good

Reza,Jun 2026

TPA - MDW

The seats were super cramped and couldn’t move without hitting other passengers

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 5 different airlines.

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

    For as low as $326, Southwest can have you in San Juan from Milwaukee in 6h 46m. 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 $118. Other airlines that can offer you cheap pricing are Frontier, from $156, and United Airlines, from $235. 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 one-way?

    $90 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Southwest and Delta, with prices starting from $108 and $112, respectively.

  • 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, October is the cheapest month in which you can book a flight from Milwaukee to San Juan (average of $108). Flying from Milwaukee to San Juan in June is currently the most expensive (average of $326). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Milwaukee to San Juan

Discover the top 5 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 June 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$118Average$386FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$156Average$360FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$235Average$418FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$256Average$508FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$316Average$488FlexibilityNo cancel feeOn-time63%

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