HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Juan

$258+ 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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — SJU
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Missoula to San Juan with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 April 29, 2025.

Round-trip from

$510
(Delta)

One-way from

$258
(Delta)

Popular in

December

Cheapest in

September

Average price

$738
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. 20% potential increase in price ($196 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 April 29, 2025.

This Delta deal was found by Cheapflights users on 4/29. 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 7/95:54 amMSO - SJU
2 stops16h 05mDelta
Sat 7/194:25 pmSJU - MSO
1 stop9h 18mDelta
Deal found 4/29$510
This American Airlines deal was found by Cheapflights users on 4/29. 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 6/91:54 pmMSO - SJU
1 stop13h 12mAmerican Airlines
Fri 6/2012:59 amSJU - MSO
2 stops16h 11mAmerican Airlines
Deal found 4/29$667
This United Airlines deal was found by Cheapflights users on 4/29. 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 7/225:20 pmMSO - SJU
1 stop22h 10mUnited Airlines
Tue 7/291:40 pmSJU - MSO
1 stop9h 43mUnited Airlines
Deal found 4/29$757
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/95:45 amMSO - SJU
3 stops21h 21mAlaska Airlines
Fri 6/2012:59 amSJU - MSO
2 stops17h 40mAlaska Airlines
Deal found 4/29$1,069

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 April 29, 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

Wed 7/9

5:54 am-11:59 pm

2 stops16h 05m

San Juan Luis Munoz Marin Intl

Sat 7/19

4:25 pm-11:43 pm

1 stop9h 18m

$510

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Mon 6/9

1:54 pm-5:06 am

1 stop13h 12m

San Juan Luis Munoz Marin Intl

Fri 6/20

12:59 am-3:10 pm

2 stops16h 11m

$667

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Tue 7/22

5:20 pm-5:30 pm

1 stop22h 10m

San Juan Luis Munoz Marin Intl

Tue 7/29

1:40 pm-9:23 pm

1 stop9h 43m

$757

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Mon 6/9

5:45 am-5:06 am

3 stops21h 21m

San Juan Luis Munoz Marin Intl

Fri 6/20

12:59 am-4:39 pm

2 stops17h 40m

$1,069

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Wed 7/9

5:54 am-11:59 pm

2 stops16h 05m

$258

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Wed 7/9

7:03 am-5:06 am

1 stop20h 03m

$335

MissoulaSan Juan

MSO - SJU

MSOSJU

Missoula Johnson-Bell Field

Wed 7/9

6:35 am-5:06 am

3 stops20h 31m

$481

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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

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 December is currently the most expensive (average of $336). 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.

Rainfall in San Juan by month

Plan your trip to San Juan by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Juan ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit San Juan when rainfall is around 2.2 in.

Temperature in San Juan by month

Plan your trip to San Juan by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Juan, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

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 April 29, 2025.
Alaska Airlines
8.0
Very good
9,961 reviews

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,936 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Comfort

7.9

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 2 airlines have 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.

  • What are the cheapest airlines flying from Missoula to San Juan round-trip?

    According to our current data, Delta ($510), American Airlines ($667), and United Airlines ($757) offers the cheapest pricing from Missoula to San Juan. Users have found that Delta is 34% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Missoula to San Juan one-way?

    $258 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on American Airlines and Alaska Airlines, with prices starting from $335 and $481, respectively.

  • 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 December is currently the most expensive (average of $336). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Missoula to San Juan

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

Top 2 airlines flying from Missoula to San Juan

Discover the top 2 airlines 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$484Average$894FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$565Average$770FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.