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San Juan

$568+ Cheap flights from Missoula (MSO) to San Juan

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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — SJU
Sep 5 — Sep 121
Sat 9/5
Sat 9/12
1 adult, Economy
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Cheap 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 August 6, 2026.

This United Airlines deal was found by Cheapflights users on 8/6. 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 9/256:15 am -
1 stop9h 23m
Thu 10/11:00 am -
2 stops14h 32m
Deal found 8/6$568
This American Airlines deal was found by Cheapflights users on 8/2. 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 11/41:10 pm -
2 stops20h 18m
Sat 11/143:53 pm -
2 stops23h 47m
Deal found 8/2$583
This American Airlines deal was found by Cheapflights users on 8/1. 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 12/101:45 pm -
2 stops17h 50m
Sun 12/136:42 pm -
2 stops20h 53m
Deal found 8/1$588
This United Airlines deal was found by Cheapflights users on 8/2. 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 11/66:15 am -
1 stop9h 10m
Sat 11/148:05 am -
2 stops16h 42m
Deal found 8/2$631
This American Airlines deal was found by Cheapflights users on 8/2. 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 11/61:10 pm -
2 stops17h 32m
Sat 11/143:53 pm -
2 stops23h 47m
Deal found 8/2$638
This United Airlines deal was found by Cheapflights users on 8/3. 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 10/266:15 am -
1 stop9h 10m
Thu 10/297:25 am -
2 stops16h 22m
Deal found 8/3$678
This American Airlines deal was found by Cheapflights users on 8/6. 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 9/251:27 pm -
2 stops22h 30m
Fri 10/23:41 pm -
2 stops23h 14m
Deal found 8/6$715
This United Airlines deal was found by Cheapflights users on 8/2. 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 11/46:15 am -
1 stop9h 10m
Sat 11/142:21 pm -
1 stop10h 26m
Deal found 8/2$725

Find 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 August 6, 2026.

Round-trip from

$538
(Delta)

Popular in

December

Cheapest in

October
From Missoula Johnson-Bell Field to San Juan
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($110 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($69 potential savings vs. average RT price).
Search Deals

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 August 6, 2026.
Use the filters below to find and compare flights from Missoula to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MissoulaSan Juan

MSO Missoula Johnson-Bell Field - SJU San Juan Luis Munoz Marin Intl

MSOSJU

Missoula Johnson-Bell Field

Thu 12/10

1:45 pm-10:35 am

2 stops17h 50m

San Juan Luis Munoz Marin Intl

Sun 12/13

6:42 pm-12:35 pm

2 stops20h 53m

$588

MissoulaSan Juan

MSO Missoula Johnson-Bell Field - SJU San Juan Luis Munoz Marin Intl

MSOSJU

Missoula Johnson-Bell Field

Mon 10/26

6:15 am-5:25 pm

1 stop9h 10m

San Juan Luis Munoz Marin Intl

Thu 10/29

7:25 am-9:47 pm

2 stops16h 22m

$678

MissoulaSan Juan

MSO Missoula Johnson-Bell Field - SJU San Juan Luis Munoz Marin Intl

MSOSJU

Missoula Johnson-Bell Field

Mon 2/1

6:15 am-6:25 pm

1 stop9h 10m

San Juan Luis Munoz Marin Intl

Wed 2/3

8:10 am-9:26 pm

2 stops16h 16m

$678
Quickest round-trip

MissoulaSan Juan

MSO Missoula Johnson-Bell Field - SJU San Juan Luis Munoz Marin Intl

MSOSJU

Missoula Johnson-Bell Field

Tue 1/12

6:15 am-6:25 pm

1 stop9h 10m

San Juan Luis Munoz Marin Intl

Wed 1/20

2:25 pm-9:26 pm

1 stop10h 01m

$687

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/1

Sorted by cheapest first

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 August 6, 2026.
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
10,072 reviews

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible
United Airlines
7.4
Good
10,072 reviews
United Airlines
7.4
Good
10,072 reviews

Boarding

7.7

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Dawn,Aug 2026

ORD - DEN

I missed my connecting flight because our plane took off ten minutes late and then when we got to the airport another plane was in our shoot waiting to get fueled up and that took 30 minutes so I missed my connecting flight. I asked if I could get off and they assured me the plane would most likely wait for me since they know what time the planes get in because of an app. I was not happy. I had to wait till 7:25 to board the next flight and then that was delayed. Gates changed till 9:20. Terrible

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 $678, American Airlines can have you in San Juan from Missoula in 9h 10m. 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 ($300), offers the cheapest pricing from Missoula to San Juan. Users have found that United Airlines is 62% 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.

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

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 August 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$300Average$733FlexibilityNo cancel feeOn-time69%

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