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San Juan

$133+ Cheap flights from Fremont, CA 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SJU
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Fremont to San Juan are usually found in January or May, booked 66 days in advance, depart on a Tuesday or Sunday and return on a Saturday

Cheap flight deals from Fremont to San Juan

Keep the following information in mind while searching for Fremont to San Juan flight deals. Data was last updated September 16, 2025.

Round-trip from

$318
(Kiwi.com)

One-way from

$133
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$468
From Fremont to San Juan
Search Deals
One-way flight from Fremont to San Juan
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Highest demand for flights based on searches. 6% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 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 Fremont to San Juan

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

This Kiwi.com deal was found by Cheapflights users on 9/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2611:00 pmSFO - SJU
1 stop12h 11mMultiple Airlines
Fri 10/311:59 amSJU - SFO
2 stops24h 51mMultiple Airlines
Deal found 9/13$318
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2611:00 pmSFO - SJU
1 stop12h 11mFrontier
Fri 10/39:26 pmSJU - SFO
2 stops18h 49mFrontier
Deal found 9/14$319
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2510:23 pmSFO - SJU
1 stop12h 46mFrontier
Wed 10/299:00 amSJU - SFO
2 stops16h 27mFrontier
Deal found 9/14$320
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/110:23 pmSFO - SJU
1 stop13h 56mMultiple Airlines
Thu 11/69:49 pmSJU - SFO
2 stops30h 20mMultiple Airlines
Deal found 9/14$325
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2510:23 pmSFO - SJU
1 stop12h 46mFrontier
Tue 10/289:00 amSJU - SFO
2 stops39h 22mFrontier
Deal found 9/15$330
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:00 pmSFO - SJU
1 stop12h 11mMultiple Airlines
Thu 10/94:04 pmSJU - SFO
2 stops35h 15mMultiple Airlines
Deal found 9/13$332
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/611:17 pmSFO - SJU
1 stop11h 37mFrontier
Mon 12/83:55 amSJU - SFO
2 stops21h 13mFrontier
Deal found 9/13$334
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2811:00 pmSFO - SJU
1 stop12h 11mMultiple Airlines
Thu 10/22:38 pmSJU - SFO
2 stops33h 43mMultiple Airlines
Deal found 9/15$338
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:00 pmSFO - SJU
1 stop12h 11mMultiple Airlines
Mon 10/63:22 pmSJU - SFO
2 stops33h 00mMultiple Airlines
Deal found 9/14$341

Cheapflights Fare Finder

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

Fly from

Fremont

Fly to

San Juan

Route

Depart

Return

Price

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 10/21

10:00 pm-12:27 pm

1 stop11h 27m

San Juan Luis Munoz Marin Intl

Wed 11/5

12:30 pm-11:59 pm

1 stop15h 29m

$356

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 12/10

7:45 am-10:23 pm

1 stop10h 38m

San Juan Luis Munoz Marin Intl

Tue 1/13

1:10 pm-11:33 pm

1 stop14h 23m

$356

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 9/30

12:43 am-3:42 pm

1 stop11h 59m

San Juan Luis Munoz Marin Intl

Tue 10/7

4:55 pm-12:55 am

1 stop11h 00m

$412

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 11/1

7:00 am-8:00 pm

1 stop10h 00m

San Juan Luis Munoz Marin Intl

Wed 11/5

2:05 am-10:22 am

1 stop12h 17m

$426

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 12/3

6:10 am-12:35 am

2 stops14h 25m

San Juan Luis Munoz Marin Intl

Sat 12/6

6:15 am-8:05 pm

1 stop17h 50m

$432

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Mon 9/29

9:38 pm-1:16 pm

1 stop12h 38m

San Juan Luis Munoz Marin Intl

Thu 10/2

12:58 pm-8:28 pm

1 stop10h 30m

$435

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 9/27

6:15 am-10:00 pm

1 stop12h 45m

San Juan Luis Munoz Marin Intl

Sat 10/4

7:30 am-6:48 pm

1 stop14h 18m

$435

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 9/24

7:25 am-10:00 pm

1 stop11h 35m

San Juan Luis Munoz Marin Intl

Thu 10/2

12:58 pm-11:57 pm

1 stop13h 59m

$435

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 12/9

12:43 am-4:36 pm

1 stop11h 53m

San Juan Luis Munoz Marin Intl

Sat 1/17

7:45 am-2:56 pm

1 stop11h 11m

$479

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 12/9

12:43 am-4:36 pm

1 stop11h 53m

San Juan Luis Munoz Marin Intl

Tue 1/13

5:50 pm-1:30 am

1 stop11h 40m

$479

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 19 results
1
2

Best time to book a flight from Fremont to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Fremont 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 Fremont to San Juan

How far ahead should I book a flight from Fremont to San Juan?

Use this chart to determine the optimal time to book a round-trip flight from Fremont to San Juan. Price data was last updated on September 12, 2025.

Booking 66 days in advance of your planned departure date is, on average, the best time to get cheap flights from Fremont to San Juan. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Fremont to San Juan?

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

What is the cheapest time of day to fly from FR8 to SJU?

Find hourly flight availability from Fremont to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

When flying from Fremont to San Juan, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Fremont to San Juan?

Use this chart to determine the cheapest time to fly round-trip from Fremont to San Juan. Price data was last updated on September 8, 2024.

Travelers seeking maximum savings on their Fremont to San Juan flight should consider departing on Thursday at noon when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 16, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Fremont 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.
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,924 reviews
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
JetBlue
7.2
Good
2,914 reviews
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Frontier
5.8
Fair
3,174 reviews
Delta
8.0
Very good
7,957 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Fremont to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    A quick flight from Fremont to San Juan can take about 11h 27m. JetBlue provides one of the quickest options available for as low as $356. The distance between Fremont and San Juan is about 3623 mi. This flight may include one or multiple stops.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Fremont to San Juan (average of $254). Flying from Fremont 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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Top 8 airlines flying from Fremont to San Juan

Discover the top 8 airlines that operate flights from Fremont 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$160Average$330FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$232Average$427FlexibilityNo cancel feeOn-time65%
DeltaCheapest$240Average$543FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$298Average$474FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$310Average$974FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$332Average$576FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$346Average$573FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$383Average$596FlexibilityNo cancel feeOn-time63%

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