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Luis Munoz Marin Intl

$298+ Cheap flights from Portland, ME (PWM) to Luis Munoz Marin Intl (SJU)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SJU
Jun 12 — Jun 191
Fri 6/12
Fri 6/19
1 adult, Economy
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Cheap 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 May 13, 2026.

This United Airlines deal was found by Cheapflights users on 5/8. 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.
Tue 10/206:00 am
PWM
-
SJU
1 stop7h 45m
United Airlines
Sun 10/251:05 am
SJU
-
PWM
1 stop7h 14m
United Airlines
Deal found 5/8$298
This American Airlines deal was found by Cheapflights users on 5/12. 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 10/206:00 am
PWM
-
SJU
1 stop7h 35m
American Airlines
Mon 10/265:25 am
SJU
-
PWM
1 stop13h 51m
American Airlines
Deal found 5/12$302
This Delta deal was found by Cheapflights users on 5/8. 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 9/216:00 am
PWM
-
SJU
1 stop7h 16m
Delta
Fri 9/257:00 am
SJU
-
PWM
1 stop6h 54m
Delta
Deal found 5/8$379
This United Airlines deal was found by Cheapflights users on 5/12. 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.
Wed 9/166:00 am
PWM
-
SJU
1 stop7h 45m
United Airlines
Wed 9/231:25 pm
SJU
-
PWM
2 stops10h 34m
United Airlines
Deal found 5/12$392
This United Airlines deal was found by Cheapflights users on 5/11. 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.
Wed 11/116:00 am
PWM
-
SJU
1 stop7h 40m
United Airlines
Sun 11/152:05 am
SJU
-
PWM
1 stop7h 14m
United Airlines
Deal found 5/11$393
This American Airlines deal was found by Cheapflights users on 5/12. 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 9/166:00 am
PWM
-
SJU
2 stops12h 10m
American Airlines
Wed 9/2312:05 pm
SJU
-
PWM
2 stops11h 36m
American Airlines
Deal found 5/12$417
This United Airlines deal was found by Cheapflights users on 5/12. 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.
Mon 5/256:00 am
PWM
-
SJU
1 stop7h 45m
United Airlines
Thu 5/284:55 pm
SJU
-
PWM
1 stop6h 56m
United Airlines
Deal found 5/12$422
This American Airlines deal was found by Cheapflights users on 5/12. 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 5/256:00 am
PWM
-
SJU
1 stop17h 01m
American Airlines
Wed 5/276:20 am
SJU
-
PWM
1 stop15h 27m
American Airlines
Deal found 5/12$430
This Kiwi.com deal was found by Cheapflights users on 5/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:38 pm
PWM
-
SJU
1 stop30h 03m
Multiple Airlines
Tue 7/146:00 am
SJU
-
PWM
2 stops15h 19m
Multiple Airlines
Deal found 5/12$435
This Southwest deal was found by Cheapflights users on 5/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:55 am
PWM
-
SJU
1 stop8h 35m
Southwest
Thu 8/203:20 pm
SJU
-
PWM
1 stop7h 05m
Southwest
Deal found 5/11$437

Find 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 May 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$298
(United Airlines)

Popular in

April

Cheapest in

October

Average price

$314
Provider with most accurate pricing for Portland-San Juan Luis Munoz Marin Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-San Juan Luis Munoz Marin Intl flights.
Search Deals
From Portland to San Juan Luis Munoz Marin Intl
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($24 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 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 May 13, 2026.
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Sat 9/19

2:35 pm-11:44 pm

1 stop9h 09m

San Juan Luis Munoz Marin Intl

Sat 9/26

7:00 am-1:54 pm

1 stop6h 54m

$302
Quickest round-trip

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Mon 9/21

6:00 am-1:16 pm

1 stop7h 16m

San Juan Luis Munoz Marin Intl

Fri 9/25

7:00 am-1:54 pm

1 stop6h 54m

$379

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Tue 10/20

1:05 pm-11:50 pm

2 stops10h 45m

San Juan Luis Munoz Marin Intl

Mon 10/26

2:00 pm-11:37 pm

2 stops9h 37m

$412

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Sat 8/22

6:00 am-2:44 pm

1 stop8h 44m

San Juan Luis Munoz Marin Intl

Tue 8/25

1:00 am-9:08 am

1 stop8h 08m

$412

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Sat 8/22

2:40 pm-12:39 am

1 stop9h 59m

San Juan Luis Munoz Marin Intl

Wed 8/26

3:10 pm-12:14 am

1 stop9h 04m

$435

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Mon 9/21

6:00 am-1:35 pm

1 stop7h 35m

San Juan Luis Munoz Marin Intl

Fri 9/25

2:25 pm-11:51 pm

1 stop9h 26m

$452

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Thu 5/28

2:36 pm-10:53 pm

1 stop8h 17m

San Juan Luis Munoz Marin Intl

Sun 6/7

6:30 am-1:30 pm

1 stop7h 00m

$468

PortlandSan Juan

PWM - SJU

PWMSJU

Portland

Wed 5/27

6:00 am-3:30 pm

1 stop9h 30m

San Juan Luis Munoz Marin Intl

Wed 6/3

5:30 pm-11:58 pm

1 stop6h 28m

$496

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/8

Sorted by cheapest first

Compare providers for flights from Portland 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 Portland 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

*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 Portland, Maine-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 Portland, Maine-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 Portland, Maine-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 Portland, Maine-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 Portland, Maine-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 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?

The best time to book flights from Portland, Maine to San Juan Luis Munoz Marin Intl Airport is 42 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, October is the cheapest month in which you can book a flight from Portland, Maine to San Juan Luis Munoz Marin Intl Airport (average of $265). Flying from Portland, Maine to San Juan Luis Munoz Marin Intl Airport in April is currently the most expensive (average of $711). 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 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 May 13, 2026.
See what other customers who have flown with Southwest,Delta, andUnited 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
7.9
Good
4,296 reviews

Boarding

8.1

Crew

8.6

Overall

7.9

Food

7.0

Comfort

8.0

Entertainment

7.5

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
4,296 reviews
Southwest
7.9
Good
4,296 reviews

Boarding

8.1

Crew

8.6

Overall

7.9

Food

7.0

Comfort

8.0

Entertainment

7.5

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
8,450 reviews
Southwest
7.9
Good
4,296 reviews

Boarding

8.1

Crew

8.6

Overall

7.9

Food

7.0

Comfort

8.0

Entertainment

7.5

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
9,706 reviews
Southwest
7.9
Good
4,296 reviews

Boarding

8.1

Crew

8.6

Overall

7.9

Food

7.0

Comfort

8.0

Entertainment

7.5

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.
JetBlue
7.2
Good
2,973 reviews
Southwest
7.9
Good
4,296 reviews

Boarding

8.1

Crew

8.6

Overall

7.9

Food

7.0

Comfort

8.0

Entertainment

7.5

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
11,662 reviews
Southwest
7.9
Good
4,296 reviews

Boarding

8.1

Crew

8.6

Overall

7.9

Food

7.0

Comfort

8.0

Entertainment

7.5

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 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 5 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 44m. 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 $174. Other airlines that can offer you cheap pricing are Delta, from $176, and United Airlines, from $235. Users have found that JetBlue is 61% cheaper than the other options available to this destination.

  • 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, October is the cheapest month in which you can book a flight from Portland, Maine to San Juan Luis Munoz Marin Intl Airport (average of $265). Flying from Portland, Maine to San Juan Luis Munoz Marin Intl Airport in April is currently the most expensive (average of $711). 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 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

Top 5 airlines flying from Portland to Luis Munoz Marin Intl

Discover the top 5 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 May 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$174Average$456FlexibilityNo cancel feeOn-time62%
DeltaCheapest$176Average$276FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$235Average$491FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$256Average$577FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$300Average$565FlexibilityNo cancel feeOn-time63%

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