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Luis Munoz Marin Intl

$118+ Cheap flights from Portland, ME (PWM) 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SJU
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to San Juan Luis Munoz Marin Intl are usually found in September or October, booked 32 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Portland to Luis Munoz Marin Intl

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) 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 September 11, 2025.

Round-trip from

$235
(American Airlines)

One-way from

$118
(Southwest)

Popular in

December

Cheapest in

September

Average price

$285
From Portland to San Juan Luis Munoz Marin Intl
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One-way flight from Portland to San Juan Luis Munoz Marin Intl
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Highest demand for flights based on searches. 5% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($20 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 Portland to Luis Munoz Marin Intl

Cheapest flights from Portland to Luis Munoz Marin Intl
Explore the most affordable flight options available from Portland to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/9. 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 10/256:00 amPWM - SJU
1 stop17h 05mAmerican Airlines
Sat 11/15:30 amSJU - PWM
1 stop15h 28mAmerican Airlines
Deal found 9/9$235
This Delta deal was found by Cheapflights users on 9/11. 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.
Fri 9/266:33 amPWM - SJU
1 stop9h 47mDelta
Tue 9/306:00 pmSJU - PWM
1 stop6h 34mDelta
Deal found 9/11$281
This American Airlines deal was found by Cheapflights users on 9/11. 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 10/257:44 amPWM - SJU
2 stops16h 10mAmerican Airlines
Fri 10/315:02 pmSJU - PWM
2 stops18h 52mAmerican Airlines
Deal found 9/11$295
This American Airlines deal was found by Cheapflights users on 9/11. 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 10/227:44 amPWM - SJU
2 stops14h 26mAmerican Airlines
Sun 10/265:30 amSJU - PWM
1 stop15h 17mAmerican Airlines
Deal found 9/11$303
This American Airlines deal was found by Cheapflights users on 9/10. 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 12/65:17 pmPWM - SJU
2 stops17h 42mAmerican Airlines
Mon 12/156:25 amSJU - PWM
1 stop12h 48mAmerican Airlines
Deal found 9/10$305
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 9/263:45 pmPWM - SJU
1 stop8h 12mUnited Airlines
Mon 9/291:05 amSJU - PWM
1 stop8h 06mUnited Airlines
Deal found 9/11$317
This Delta deal was found by Cheapflights users on 9/10. 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.
Fri 9/196:33 amPWM - SJU
1 stop9h 47mDelta
Fri 9/266:00 pmSJU - PWM
1 stop6h 34mDelta
Deal found 9/10$321
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/253:45 pmPWM - SJU
1 stop8h 12mUnited Airlines
Fri 10/311:05 amSJU - PWM
2 stops13h 07mUnited Airlines
Deal found 9/10$327
This JetBlue deal was found by Cheapflights users on 9/11. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/197:30 amPWM - SJU
1 stop9h 13mJetBlue
Fri 9/262:25 pmSJU - PWM
1 stop7h 42mJetBlue
Deal found 9/11$349
This Delta deal was found by Cheapflights users on 9/10. 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 12/62:34 pmPWM - SJU
1 stop8h 29mDelta
Mon 12/156:35 pmSJU - PWM
1 stop6h 24mDelta
Deal found 9/10$363
This American Airlines deal was found by Cheapflights users on 9/10. 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 11/76:00 amPWM - SJU
1 stop16h 52mAmerican Airlines
Sat 11/156:25 amSJU - PWM
1 stop6h 43mAmerican Airlines
Deal found 9/10$380

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland 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 September 11, 2025.
Use the filters below to find and compare flights from Portland to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Portland

Fly to

Luis Munoz Marin Intl

Route

Depart

Return

Price

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Sat 10/25

6:00 am-11:05 pm

1 stop17h 05m

San Juan Luis Munoz Marin Intl

Sat 11/1

5:30 am-4:27 pm

2 stops10h 57m

$235

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Fri 9/26

3:45 pm-11:57 pm

1 stop8h 12m

San Juan Luis Munoz Marin Intl

Mon 9/29

1:05 am-9:11 am

1 stop8h 06m

$317

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Sat 10/25

6:00 am-1:45 pm

1 stop7h 45m

San Juan Luis Munoz Marin Intl

Fri 10/31

1:05 am-2:12 pm

2 stops13h 07m

$353

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Sat 12/6

2:34 pm-12:03 am

1 stop8h 29m

San Juan Luis Munoz Marin Intl

Mon 12/15

6:35 pm-11:59 pm

1 stop6h 24m

$363

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Sun 2/1

5:35 am-7:20 pm

2 stops12h 45m

San Juan Luis Munoz Marin Intl

Fri 2/6

5:35 am-3:15 pm

2 stops10h 40m

$430

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Fri 11/7

6:00 am-11:52 pm

1 stop16h 52m

San Juan Luis Munoz Marin Intl

Sat 11/15

8:00 am-9:47 pm

2 stops14h 47m

$448

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Thu 9/25

2:17 pm-9:24 pm

1 stop7h 07m

San Juan Luis Munoz Marin Intl

Mon 9/29

2:25 pm-10:07 pm

1 stop7h 42m

$449

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Mon 11/10

5:25 pm-1:25 am

1 stop7h 00m

$118

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Sat 11/1

3:20 pm-11:45 pm

1 stop8h 25m

$118

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Thu 10/30

1:27 pm-9:59 pm

1 stop8h 32m

$138

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 18 results
1
2

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

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from Portland 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 Portland to San Juan Luis Munoz Marin Intl Airport

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

Use this chart to determine the optimal time to book a round-trip flight from Portland to Luis Munoz Marin Intl. Price data was last updated on August 29, 2025.

The best time to book flights from Portland, Maine to San Juan Luis Munoz Marin Intl Airport is 32 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, September is the cheapest month in which you can book a flight from Portland, Maine to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Portland, Maine 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 PWM to SJU?

Find hourly flight availability from Portland 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 September 11, 2025.

When flying from Portland, Maine 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 46% versus a flight in the morning.

How much does it cost to fly round-trip from Portland, Maine 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 September 11, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Portland to San Juan Luis Munoz Marin Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

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
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

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
7,960 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

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
8,937 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

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
4,248 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

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
JetBlue
7.2
Good
2,913 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Food

7.0

Overall

8.0

Comfort

8.0

Boarding

8.1

Crew

8.6

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 Portland 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 Portland to San Juan Luis Munoz Marin Intl?

    Most people fly from Portland (PWM) if they book a flight from Portland to San Juan Luis Munoz Marin Intl. On average, Portland has 0 outbound flights to San Juan Luis Munoz Marin Intl per day from 6 airlines. Portland is conveniently located just 2.9 mi from Portland’s city center.

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

    Departing from Portland, Maine to San Juan Luis Munoz Marin Intl Airport will take you 8h 12m. There are 1758 mi between Portland, Maine and San Juan Luis Munoz Marin Intl Airport. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Cheapflights users have booked flights from Portland, Maine to San Juan Luis Munoz Marin Intl Airport round-trip from $145. Other airlines that can offer you cheap pricing are Delta, from $274, and American Airlines, from $281. Users have found that Frontier is 69% cheaper than the other options available to this destination.

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

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $118. Users have also found prices from $138 and $190 on Delta and American Airlines, respectively.

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

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

  • How can I find direct flights from Portland 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 Portland to Luis Munoz Marin Intl.

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

    Yes. Cheapflights offers flight deals from Portland 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 Portland, Maine to San Juan Luis Munoz Marin Intl Airport?

    Currently, September is the cheapest month in which you can book a flight from Portland, Maine to San Juan Luis Munoz Marin Intl Airport (average of $254). Flying from Portland, Maine 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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Alternative routes for Portland to Luis Munoz Marin Intl

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Luis Munoz Marin Intl flights
Bangor to Luis Munoz Marin Intl flights
Augusta to Luis Munoz Marin Intl flights

Top 6 airlines flying from Portland to Luis Munoz Marin Intl

Discover the top 6 airlines that operate flights from Portland 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$145Average$228FlexibilityNo cancel feeOn-time62%
DeltaCheapest$274Average$387FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$281Average$607FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$285Average$635FlexibilityNo cancel feeOn-time69%
JetBlueCheapest$297Average$508FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$401Average$656FlexibilityNo cancel feeOn-time63%

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