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San Juan

$180+ 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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SJU
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$325
(Frontier)

One-way from

$180
(Delta)

Popular in

December

Cheapest in

September

Average price

$578
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. 11% potential increase in price ($63 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Frontier deal was found by Cheapflights users on 6/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/3010:29 pmSFO - SJU
1 stop12h 57mFrontier
Thu 9/113:40 amSJU - SFO
2 stops20h 42mFrontier
Deal found 6/10$325
This JetBlue deal was found by Cheapflights users on 6/10. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2110:30 pmSFO - SJU
1 stop13h 24mJetBlue
Wed 11/52:30 pmSJU - SFO
1 stop12h 18mJetBlue
Deal found 6/10$337
This Delta deal was found by Cheapflights users on 6/11. 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.
Tue 9/167:30 amSFO - SJU
1 stop11h 38mDelta
Fri 9/2612:55 pmSJU - SFO
1 stop9h 41mDelta
Deal found 6/11$349
This American Airlines deal was found by Cheapflights users on 6/12. 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 10/2812:47 amSFO - SJU
1 stop10h 20mAmerican Airlines
Sat 11/82:55 pmSJU - SFO
2 stops12h 07mAmerican Airlines
Deal found 6/12$369
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 9/2211:10 pmSFO - SJU
1 stop12h 34mUnited Airlines
Sun 9/284:55 pmSJU - SFO
1 stop11h 00mUnited Airlines
Deal found 6/10$416
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/85:30 amSFO - SJU
2 stops12h 15mSouthwest
Mon 10/205:50 amSJU - SFO
2 stops14h 45mSouthwest
Deal found 6/10$488

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 June 12, 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

Sat 8/30

10:29 pm-2:26 pm

1 stop12h 57m

San Juan Luis Munoz Marin Intl

Thu 9/11

3:40 am-9:22 pm

2 stops20h 42m

$325

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 10/21

10:30 pm-2:54 pm

1 stop13h 24m

San Juan Luis Munoz Marin Intl

Wed 11/5

2:30 pm-10:48 pm

1 stop12h 18m

$337

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 9/16

7:30 am-10:08 pm

1 stop11h 38m

San Juan Luis Munoz Marin Intl

Fri 9/26

12:55 pm-7:36 pm

1 stop9h 41m

$349

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 10/28

12:47 am-2:07 pm

1 stop10h 20m

San Juan Luis Munoz Marin Intl

Sat 11/8

2:55 pm-11:02 pm

2 stops12h 07m

$369

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Mon 9/22

11:10 pm-2:44 pm

1 stop12h 34m

San Juan Luis Munoz Marin Intl

Sun 9/28

4:55 pm-12:55 am

1 stop11h 00m

$416

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 10/8

5:30 am-8:45 pm

2 stops12h 15m

San Juan Luis Munoz Marin Intl

Mon 10/20

5:50 am-5:35 pm

2 stops14h 45m

$488

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 9/9

6:00 am-10:07 pm

2 stops13h 07m

$180

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Thu 7/10

8:53 pm-2:39 am

1 stop26h 46m

$182

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Mon 9/22

8:40 pm-12:40 pm

1 stop13h 00m

$185

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 8/30

6:30 am-11:59 pm

2 stops14h 29m

$191

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 15 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 June 9, 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 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 June 12, 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.

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 June 12, 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
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

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
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,925 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.8

Food

7.1

Boarding

8.1

Crew

8.5

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 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 $180 on Delta. Other airlines that offer cheap prices include Frontier from $182 and JetBlue from $185 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 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$160Average$310FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$238Average$411FlexibilityNo cancel feeOn-time65%
DeltaCheapest$242Average$565FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$277Average$458FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$325Average$556FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$326Average$577FlexibilityNo cancel feeOn-time71%
Sun Country AirCheapest$334Average$904FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$383Average$618FlexibilityNo cancel feeOn-time63%

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