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San Juan

$134+ 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 8/8. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SJU
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$298
(Frontier)

One-way from

$134
(Frontier)

Popular in

December

Cheapest in

September

Average price

$549
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. 10% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This Frontier deal was found by Cheapflights users on 7/28. 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 8/98:53 pmSFO - SJU
1 stop9h 11mFrontier
Sat 8/169:30 pmSJU - SFO
1 stop15h 55mFrontier
Deal found 7/28$298
This JetBlue deal was found by Cheapflights users on 7/29. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/317:45 amSFO - SJU
1 stop10h 44mJetBlue
Wed 11/1212:45 pmSJU - SFO
1 stop15h 29mJetBlue
Deal found 7/29$358
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Thu 10/99:00 pmSFO - SJU
1 stop12h 00mUnited Airlines
Fri 10/102:00 pmSJU - SFO
1 stop11h 57mUnited Airlines
Deal found 7/29$364
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/205:45 amSFO - SJU
2 stops14h 52mAmerican Airlines
Thu 9/2512:01 pmSJU - SFO
2 stops15h 14mAmerican Airlines
Deal found 7/30$369
This Delta deal was found by Cheapflights users on 7/29. 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.
Thu 9/259:38 pmSFO - SJU
1 stop12h 38mDelta
Fri 10/37:30 amSJU - SFO
2 stops18h 59mDelta
Deal found 7/29$379
This Southwest deal was found by Cheapflights users on 7/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/87:50 pmSFO - SJU
2 stops12h 00mSouthwest
Mon 9/225:50 amSJU - SFO
1 stop17h 20mSouthwest
Deal found 7/29$411

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 July 31, 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 8/9

8:53 pm-9:04 am

1 stop9h 11m

San Juan Luis Munoz Marin Intl

Sat 8/16

9:30 pm-10:25 am

1 stop15h 55m

$298

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Thu 10/9

9:00 pm-12:00 pm

1 stop12h 00m

San Juan Luis Munoz Marin Intl

Fri 10/10

2:00 pm-10:57 pm

1 stop11h 57m

$364

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 9/20

5:45 am-11:37 pm

2 stops14h 52m

San Juan Luis Munoz Marin Intl

Thu 9/25

12:01 pm-12:15 am

2 stops15h 14m

$369

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 9/16

11:29 pm-2:56 pm

1 stop12h 27m

San Juan Luis Munoz Marin Intl

Fri 9/19

2:25 pm-12:59 am

1 stop13h 34m

$370

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Thu 9/25

9:38 pm-1:16 pm

1 stop12h 38m

San Juan Luis Munoz Marin Intl

Fri 10/3

7:30 am-11:29 pm

2 stops18h 59m

$379

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Mon 9/8

7:50 pm-10:50 am

2 stops12h 00m

San Juan Luis Munoz Marin Intl

Mon 9/22

5:50 am-8:10 pm

1 stop17h 20m

$411

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Fri 8/8

8:53 pm-3:54 pm

1 stop16h 01m

$134

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 10/28

7:45 am-9:29 pm

1 stop10h 44m

$166

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Fri 9/5

5:00 pm-2:15 pm

1 stop18h 15m

$183

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 10/28

12:43 am-3:36 pm

1 stop11h 53m

$185

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 14 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 July 25, 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 July 31, 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 July 31, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

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

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

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
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

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
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

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
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

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
10,000 reviews

Crew

8.5

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

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 $134 on Frontier. Other airlines that offer cheap prices include JetBlue from $166 and American Airlines from $183 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$160Average$334FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$232Average$415FlexibilityNo cancel feeOn-time65%
DeltaCheapest$242Average$572FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$288Average$464FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$328Average$558FlexibilityNo cancel feeOn-time69%
Sun Country AirCheapest$337Average$904FlexibilityNo cancel feeOn-time83%
American AirlinesCheapest$343Average$582FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$383Average$604FlexibilityNo cancel feeOn-time63%

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