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San Juan

$148+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SJU
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
1 adult, Economy
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Cheapflights Tip: The best prices from Fremont to San Juan are usually found in September or January, booked 76 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 April 2, 2025.

Round-trip from

$296
(Frontier)

One-way from

$148
(Frontier)

Popular in

December

Cheapest in

September

Average price

$502
From Fremont to San Juan
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One-way flight from Fremont to San Juan
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Highest demand for flights based on searches. 7% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 2, 2025.

This Frontier deal was found by Cheapflights users on 4/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1611:58 pmSFO - SJU
1 stop11h 55mFrontier
Mon 4/213:56 amSJU - SFO
1 stop12h 23mFrontier
Deal found 4/1$296
This JetBlue deal was found by Cheapflights users on 4/1. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2811:35 pmSFO - SJU
1 stop12h 01mJetBlue
Sat 5/31:10 pmSJU - SFO
1 stop13h 58mJetBlue
Deal found 4/1$307
This United Airlines deal was found by Cheapflights users on 3/31. 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 4/2612:43 amSFO - SJU
1 stop11h 57mUnited Airlines
Thu 5/11:05 amSJU - SFO
1 stop11h 29mUnited Airlines
Deal found 3/31$349
This Delta deal was found by Cheapflights users on 4/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/276:30 amSFO - SJU
2 stops13h 45mDelta
Sat 5/36:15 amSJU - SFO
1 stop10h 03mDelta
Deal found 4/1$359
This Expedia deal was found by Cheapflights users on 3/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/266:40 amSFO - SJU
2 stops19h 20mMultiple Airlines
Fri 5/210:46 amSJU - SFO
1 stop14h 36mMultiple Airlines
Deal found 3/30$412
This American Airlines deal was found by Cheapflights users on 4/1. 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.
Mon 10/201:07 amSFO - SJU
2 stops12h 13mAmerican Airlines
Tue 10/2811:50 amSJU - SFO
2 stops12h 35mAmerican Airlines
Deal found 4/1$414

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 April 2, 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

Wed 4/16

11:58 pm-2:53 pm

1 stop11h 55m

San Juan Luis Munoz Marin Intl

Mon 4/21

3:56 am-1:19 pm

1 stop12h 23m

$296

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Mon 4/28

11:35 pm-2:36 pm

1 stop12h 01m

San Juan Luis Munoz Marin Intl

Sat 5/3

1:10 pm-12:08 am

1 stop13h 58m

$307

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 4/26

12:43 am-3:40 pm

1 stop11h 57m

San Juan Luis Munoz Marin Intl

Thu 5/1

1:05 am-9:34 am

1 stop11h 29m

$349

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sun 4/27

6:30 am-11:15 pm

2 stops13h 45m

San Juan Luis Munoz Marin Intl

Fri 5/2

6:15 am-1:45 pm

1 stop10h 30m

$359

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 4/26

6:40 am-5:00 am

2 stops19h 20m

San Juan Luis Munoz Marin Intl

Fri 5/2

10:46 am-10:22 pm

1 stop14h 36m

$412

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 4/22

12:06 pm-5:00 am

2 stops13h 54m

San Juan Luis Munoz Marin Intl

Tue 5/6

5:25 am-10:05 pm

1 stop19h 40m

$417

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 4/22

6:40 am-5:00 am

2 stops19h 20m

San Juan Luis Munoz Marin Intl

Sat 4/26

6:05 am-6:01 pm

2 stops14h 56m

$543

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 4/16

11:58 pm-2:53 pm

1 stop11h 55m

$148

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Fri 4/25

12:43 am-3:40 pm

1 stop11h 57m

$175

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Fri 5/9

12:21 am-8:33 pm

1 stop17h 12m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 17 results
1
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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 March 28, 2025.

Booking 76 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 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.

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 April 2, 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 May 12, 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.

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 2, 2025.
Read through reviews of airlines operating flights from Fremont to San Juan, such as Alaska Airlines, Southwest and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,823 reviews

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,823 reviews
Alaska Airlines
8.0
Very good
9,823 reviews

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,275 reviews
Alaska Airlines
8.0
Very good
9,823 reviews

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,823 reviews

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,615 reviews
Alaska Airlines
8.0
Very good
9,823 reviews

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
JetBlue
7.3
Good
2,924 reviews
Alaska Airlines
8.0
Very good
9,823 reviews

Crew

8.5

Comfort

7.9

Food

7.1

Boarding

8.2

Entertainment

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

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

    One-way options have recently been found by users for as low as $148 on Frontier. Other airlines that offer cheap prices include United Airlines from $175 and American Airlines from $179 one-way.

  • 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 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

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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 April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$160Average$298FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$192Average$579FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$238Average$424FlexibilityNo cancel feeOn-time65%
DeltaCheapest$282Average$653FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$287Average$565FlexibilityNo cancel feeOn-time69%
Sun Country AirCheapest$292Average$886FlexibilityNo cancel feeOn-time83%
American AirlinesCheapest$294Average$594FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$383Average$612FlexibilityNo cancel feeOn-time63%

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