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San Juan

$276+ Cheap flights from Missoula (MSO) 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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — SJU
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Missoula to San Juan

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

Round-trip from

$531
(United Airlines)

One-way from

$276
(Trip.com)

Popular in

January

Cheapest in

October

Average price

$665
From Missoula Johnson-Bell Field to San Juan
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One-way flight from Missoula Johnson-Bell Field to San Juan
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Highest demand for flights based on searches. 10% potential increase in price ($86 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% 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 Missoula to San Juan

Cheapest flights from Missoula to San Juan
Explore the most affordable flight options available from Missoula to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

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 11/16:20 amMSO - SJU
1 stop9h 05mUnited Airlines
Fri 11/142:05 amSJU - MSO
2 stops16h 56mUnited Airlines
Deal found 9/10$531
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.
Wed 10/86:25 amMSO - SJU
1 stop9h 05mUnited Airlines
Tue 10/141:05 amSJU - MSO
2 stops14h 22mUnited Airlines
Deal found 9/10$556
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.
Mon 12/86:16 pmMSO - SJU
2 stops15h 41mDelta
Thu 12/113:20 pmSJU - MSO
2 stops12h 15mDelta
Deal found 9/10$560
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.
Mon 12/87:00 amMSO - SJU
2 stops25h 59mAmerican Airlines
Thu 12/117:00 amSJU - MSO
1 stop16h 33mAmerican Airlines
Deal found 9/9$641
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:15 amMSO - SJU
1 stop9h 10mUnited Airlines
Thu 12/112:25 pmSJU - MSO
1 stop9h 53mUnited Airlines
Deal found 9/9$688

Cheapflights Fare Finder

 
Customize your flight search to find flights from Missoula 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 September 11, 2025.
Use the filters below to find and compare flights from Missoula to San Juan that are best for you.

Fly from

Missoula

Fly to

San Juan

Route

Depart

Return

Price

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Sat 11/1

6:20 am-5:25 pm

1 stop9h 05m

San Juan Luis Munoz Marin Intl

Fri 11/14

2:05 am-4:01 pm

2 stops16h 56m

$531

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Sat 11/1

6:20 am-5:25 pm

1 stop9h 05m

San Juan Luis Munoz Marin Intl

Fri 11/7

2:05 am-1:33 pm

2 stops14h 28m

$531

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Wed 10/8

6:25 am-5:30 pm

1 stop9h 05m

San Juan Luis Munoz Marin Intl

Tue 10/14

1:05 am-1:27 pm

2 stops14h 22m

$556

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Mon 12/8

6:16 pm-12:57 pm

2 stops15h 41m

San Juan Luis Munoz Marin Intl

Thu 12/11

3:20 pm-12:35 am

2 stops12h 15m

$560

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Thu 1/8

7:00 am-10:14 pm

1 stop12h 14m

San Juan Luis Munoz Marin Intl

Wed 1/21

6:50 pm-12:25 pm

2 stops20h 35m

$571

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Mon 12/8

6:15 am-6:25 pm

1 stop9h 10m

San Juan Luis Munoz Marin Intl

Thu 12/11

2:25 pm-9:18 pm

1 stop9h 53m

$688

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Sat 10/11

8:30 am-2:02 am

2 stops15h 32m

$276

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Tue 12/30

5:20 am-11:16 pm

2 stops14h 56m

$317

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Wed 12/24

1:18 pm-9:36 am

2 stops17h 18m

$398

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Thu 12/25

5:20 am-9:10 pm

2 stops12h 50m

$428

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 14 results
1
2

Best time to book a flight from Missoula to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Missoula 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 Missoula to San Juan
No data available for this route at this time. Please check back soon.

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 September 11, 2025.
Read through reviews of airlines operating flights from Missoula to San Juan, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

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

    Missoula Johnson-Bell Field (MSO) is the airport you will fly out of if you book a flight from Missoula to San Juan. You should not have trouble finding flights to San Juan from Johnson-Bell Field; the airport handles an average of 0 outbound flights to San Juan per day. You should also have plenty of airline options to choose from since 1 airline has flights from the Missoula airport to San Juan. It is only a 5.5 mi journey to Johnson-Bell Field (MSO) from Missoula’s city center.

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

    For as low as $531, United Airlines can have you in San Juan from Missoula in 9h 05m. There are 3342 mi between Missoula and San Juan. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Missoula to San Juan round-trip?

    According to our current data, United Airlines ($565), offers the cheapest pricing from Missoula to San Juan. Users have found that United Airlines is 21% cheaper than the other options available to this destination.

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

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

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

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

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

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

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

See prices for flight routes from nearby airports that may be better suited for you.
Bozeman to Luis Munoz Marin Intl flights
Billings to Luis Munoz Marin Intl flights
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Kalispell to Luis Munoz Marin Intl flights

Top airline flying from Missoula to San Juan

Discover the top airline that operate flights from Missoula 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$565Average$764FlexibilityNo cancel feeOn-time69%

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