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San Juan

$311+ Cheap flights from Kalispell (FCA) 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 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — SJU
oct. 16 — oct. 231
jue. 10/16
jue. 10/23
1 adult, Economy
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Cheap flight deals from Kalispell to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Kalispell (FCA) 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 septiembre 16, 2025.

Round-trip from

$621
(United Airlines)

One-way from

$311
(United Airlines)
From Kalispell Glacier Park to San Juan
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One-way flight from Kalispell Glacier Park to San Juan
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Find flight deals from Kalispell to San Juan

Cheapest flights from Kalispell to San Juan
Explore the most affordable flight options available from Kalispell to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 16, 2025.

This United Airlines deal was found by Cheapflights users on 9/14. 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.
mié. 12/106:15 amFCA - SJU
1 stop9h 10mUnited Airlines
sáb. 12/138:30 amSJU - FCA
2 stops16h 16mUnited Airlines
Deal found 9/14$621
This United Airlines deal was found by Cheapflights users on 9/15. 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.
jue. 12/116:15 amFCA - SJU
2 stops13h 07mUnited Airlines
lun. 12/158:30 amSJU - FCA
2 stops16h 16mUnited Airlines
Deal found 9/15$665
This United Airlines deal was found by Cheapflights users on 9/14. 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.
mié. 12/106:15 amFCA - SJU
2 stops13h 07mUnited Airlines
lun. 12/152:25 pmSJU - FCA
1 stop10h 21mUnited Airlines
Deal found 9/14$725
This United Airlines deal was found by Cheapflights users on 9/14. 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.
vie. 9/264:08 pmFCA - SJU
2 stops17h 52mUnited Airlines
jue. 10/21:05 amSJU - FCA
2 stops14h 20mUnited Airlines
Deal found 9/14$735
This American Airlines deal was found by Cheapflights users on 9/14. 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.
vie. 9/263:49 pmFCA - SJU
2 stops21h 04mAmerican Airlines
vie. 10/37:05 pmSJU - FCA
2 stops21h 18mAmerican Airlines
Deal found 9/14$745
This United Airlines deal was found by Cheapflights users on 9/14. 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.
vie. 12/126:15 amFCA - SJU
2 stops13h 07mUnited Airlines
lun. 12/152:25 pmSJU - FCA
1 stop10h 21mUnited Airlines
Deal found 9/14$815

Cheapflights Fare Finder

 
Customize your flight search to find flights from Kalispell 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 septiembre 16, 2025.
Use the filters below to find and compare flights from Kalispell to San Juan that are best for you.

Fly from

Kalispell

Fly to

San Juan

Route

Depart

Return

Price

KalispellSan Juan

FCA - SJU

FCASJU

Kalispell Glacier Park

jue. 12/11

6:15 am-10:22 pm

2 stops13h 07m

San Juan Luis Munoz Marin Intl

lun. 12/15

8:30 am-9:46 pm

2 stops16h 16m

$665

KalispellSan Juan

FCA - SJU

FCASJU

Kalispell Glacier Park

mié. 12/10

6:15 am-10:22 pm

2 stops13h 07m

San Juan Luis Munoz Marin Intl

lun. 12/15

2:25 pm-9:46 pm

1 stop10h 21m

$725

KalispellSan Juan

FCA - SJU

FCASJU

Kalispell Glacier Park

vie. 9/26

6:30 am-11:57 pm

2 stops15h 27m

San Juan Luis Munoz Marin Intl

vie. 10/3

2:00 pm-9:31 pm

1 stop9h 31m

$735

KalispellSan Juan

FCA - SJU

FCASJU

Kalispell Glacier Park

mié. 12/10

6:15 am-10:22 pm

2 stops13h 07m

San Juan Luis Munoz Marin Intl

vie. 12/12

2:05 am-1:35 pm

2 stops14h 30m

$753

KalispellSan Juan

FCA - SJU

FCASJU

Kalispell Glacier Park

sáb. 10/18

6:30 am-11:57 pm

2 stops15h 27m

$311

KalispellSan Juan

FCA - SJU

FCASJU

Kalispell Glacier Park

sáb. 10/18

1:14 pm-2:08 pm

1 stop22h 54m

$726

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Best time to book a flight from Kalispell to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Kalispell 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 Kalispell 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 septiembre 16, 2025.
See what other customers who have flown with United Airlines from Kalispell to San Juan have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Overall

7.4

Boarding

7.7

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
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Crew

8.1

Comfort

7.3

Food

6.6

Entertainment

7.1

Overall

7.4

Boarding

7.7

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 Kalispell 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 Kalispell to San Juan?

    Most people fly from Kalispell Glacier Park (FCA) if they book a flight from Kalispell to San Juan. On average, Glacier Park has 0 outbound flights to San Juan per day from 1 airline. Kalispell Glacier Park is conveniently located just 8.4 mi from Kalispell’s city center.

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

    A quick flight from Kalispell to San Juan can take about 13h 07m. United Airlines provides one of the quickest options available for as low as $665. Kalispell and San Juan are separated by a distance of 3382 mi.

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

    Cheapflights users have booked flights from Kalispell to San Juan round-trip from $574.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Kalispell to San Juan (average of $254). Flying from Kalispell 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 Kalispell 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
Kalispell to Luis Munoz Marin Intl flights
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Top airline flying from Kalispell to San Juan

Discover the top airline that operate flights from Kalispell 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 septiembre 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$574Average$857FlexibilityNo cancel feeOn-time69%

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