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San Juan

$483+ 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 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — SJU
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
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 February 11, 2026.

This United Airlines deal was found by Cheapflights users on 2/9. 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 10/56:15 am
MSO
-
SJU
1 stop9h 15m
United Airlines
Tue 10/132:00 pm
SJU
-
MSO
1 stop9h 26m
United Airlines
Deal found 2/9$516
This American Airlines deal was found by Cheapflights users on 2/9. 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 10/51:29 pm
MSO
-
SJU
2 stops21h 11m
American Airlines
Tue 10/137:00 pm
SJU
-
MSO
2 stops19h 39m
American Airlines
Deal found 2/9$552
This United Airlines deal was found by Cheapflights users on 2/10. 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 4/116:15 am
MSO
-
SJU
2 stops13h 09m
United Airlines
Sat 4/257:20 am
SJU
-
MSO
2 stops16h 15m
United Airlines
Deal found 2/10$562
This Delta deal was found by Cheapflights users on 2/11. 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.
Wed 3/258:32 am
MSO
-
SJU
2 stops12h 43m
Delta
Tue 4/77:00 am
SJU
-
MSO
2 stops19h 24m
Delta
Deal found 2/11$571
This American Airlines deal was found by Cheapflights users on 2/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/71:08 pm
MSO
-
SJU
2 stops18h 05m
American Airlines
Tue 5/55:45 am
SJU
-
MSO
2 stops18h 00m
American Airlines
Deal found 2/8$591
This American Airlines deal was found by Cheapflights users on 2/10. 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.
Tue 8/46:45 am
MSO
-
SJU
1 stop14h 31m
American Airlines
Mon 8/1010:32 am
SJU
-
MSO
2 stops14h 56m
American Airlines
Deal found 2/10$601
This United Airlines deal was found by Cheapflights users on 2/8. 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 4/76:15 am
MSO
-
SJU
2 stops12h 23m
United Airlines
Tue 5/51:00 am
SJU
-
MSO
2 stops14h 35m
United Airlines
Deal found 2/8$619
This Delta deal was found by Cheapflights users on 2/11. 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.
Wed 3/258:32 am
MSO
-
SJU
2 stops12h 43m
Delta
Mon 4/66:15 am
SJU
-
MSO
2 stops20h 09m
Delta
Deal found 2/11$621
This American Airlines deal was found by Cheapflights users on 2/9. 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.
Tue 4/71:08 pm
MSO
-
SJU
2 stops18h 05m
American Airlines
Tue 4/216:45 am
SJU
-
MSO
1 stop17h 00m
American Airlines
Deal found 2/9$630
This American Airlines deal was found by Cheapflights users on 2/10. 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 8/14:40 pm
MSO
-
SJU
2 stops14h 53m
American Airlines
Fri 8/73:00 pm
SJU
-
MSO
1 stop10h 28m
American Airlines
Deal found 2/10$640

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 February 11, 2026.

Round-trip from

$562
(United Airlines)

One-way from

$483

Popular in

December

Cheapest in

October

Average price

$531
From Missoula Johnson-Bell Field to San Juan
Search Deals
One-way flight from Missoula Johnson-Bell Field to San Juan
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($248 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 10% potential price decrease ($74 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
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 February 11, 2026.
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 4/11

6:15 am-9:24 pm

2 stops13h 09m

San Juan Luis Munoz Marin Intl

Sat 4/25

7:20 am-9:35 pm

2 stops16h 15m

$562

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Wed 3/25

8:32 am-11:15 pm

2 stops12h 43m

San Juan Luis Munoz Marin Intl

Tue 4/7

7:00 am-12:24 am

2 stops19h 24m

$571

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Tue 4/7

1:08 pm-9:13 am

2 stops18h 05m

San Juan Luis Munoz Marin Intl

Tue 5/5

6:45 am-9:45 pm

1 stop17h 00m

$591

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Tue 8/4

6:45 am-11:16 pm

1 stop14h 31m

San Juan Luis Munoz Marin Intl

Mon 8/10

10:32 am-11:28 pm

2 stops14h 56m

$601

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Tue 4/7

6:15 am-8:38 pm

2 stops12h 23m

San Juan Luis Munoz Marin Intl

Tue 5/5

1:00 am-1:35 pm

2 stops14h 35m

$619

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Mon 3/30

5:20 am-8:18 pm

2 stops12h 58m

San Juan Luis Munoz Marin Intl

Mon 4/6

6:15 am-12:24 am

2 stops20h 09m

$621

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Tue 4/7

1:08 pm-9:13 am

2 stops18h 05m

San Juan Luis Munoz Marin Intl

Tue 4/21

6:45 am-9:45 pm

1 stop17h 00m

$630

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Sat 8/1

4:40 pm-9:33 am

2 stops14h 53m

San Juan Luis Munoz Marin Intl

Fri 8/7

7:05 pm-12:16 pm

2 stops19h 11m

$686

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Mon 4/6

1:20 pm-4:24 am

1 stop13h 04m

San Juan Luis Munoz Marin Intl

Fri 4/10

6:45 am-9:45 pm

1 stop17h 00m

$723

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Sat 2/21

6:15 am-6:25 pm

1 stop9h 10m

$483

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/8

Showing 1-10 of 13 results
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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 February 11, 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
9,274 reviews

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,274 reviews
United Airlines
7.4
Good
9,274 reviews

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

Food

6.6

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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 $571, United Airlines can have you in San Juan from Missoula in 12h 43m. 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 ($442), offers the cheapest pricing from Missoula to San Juan. Users have found that United Airlines is 41% 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
Missoula to Luis Munoz Marin Intl flights
Billings to Luis Munoz Marin Intl flights
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 February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$442Average$735FlexibilityNo cancel feeOn-time69%

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