HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Diego

$39+ Cheap flights from Fremont, CA to San Diego (SAN)

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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SAN
Nov 19 — Nov 261
Wed 11/19
Wed 11/26
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Fremont to San Diego with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Fremont to San Diego are usually found in January or February, booked 72 days in advance, depart on a Tuesday or Monday and return on a Friday

Find flight deals from Fremont to San Diego

Cheapest flights from Fremont to San Diego
Explore the most affordable flight options available from Fremont to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 20, 2025.

This Southwest deal was found by Cheapflights users on 10/18. 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.
Thu 11/1311:45 amSFO - SAN
Nonstop1h 35mSouthwest
Sun 11/167:00 amSAN - SFO
Nonstop1h 45mSouthwest
Deal found 10/18$77
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Tue 11/1811:41 amSFO - SAN
Nonstop1h 42mMultiple Airlines
Sun 11/2311:43 amSAN - SFO
Nonstop1h 56mMultiple Airlines
Deal found 10/19$78
This Frontier deal was found by Cheapflights users on 10/18. 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 10/2510:24 amSFO - SAN
Nonstop1h 42mFrontier
Thu 11/612:17 pmSAN - SFO
Nonstop1h 52mFrontier
Deal found 10/18$79
This Frontier deal was found by Cheapflights users on 10/19. 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.
Tue 12/232:13 pmSFO - SAN
Nonstop1h 39mFrontier
Thu 1/18:10 pmSAN - SFO
Nonstop1h 53mFrontier
Deal found 10/19$80
This CheapOair deal was found by Cheapflights users on 10/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/12:19 pmSFO - SAN
Nonstop1h 39mFrontier
Mon 11/312:12 pmSAN - SFO
Nonstop1h 52mFrontier
Deal found 10/20$81
This Frontier deal was found by Cheapflights users on 10/18. 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.
Mon 12/292:13 pmSFO - SAN
Nonstop1h 39mFrontier
Tue 12/308:10 pmSAN - SFO
Nonstop1h 53mFrontier
Deal found 10/18$82
This Frontier deal was found by Cheapflights users on 10/19. 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 12/262:13 pmSFO - SAN
Nonstop1h 39mFrontier
Sat 1/38:10 pmSAN - SFO
Nonstop1h 53mFrontier
Deal found 10/19$83
This Kiwi.com deal was found by Cheapflights users on 10/18. 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 11/87:30 pmSFO - SAN
Nonstop1h 45mMultiple Airlines
Tue 11/119:10 amSAN - SFO
Nonstop1h 51mMultiple Airlines
Deal found 10/18$84
This Trip.com deal was found by Cheapflights users on 10/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/12:19 pmSFO - SAN
Nonstop1h 39mMultiple Airlines
Tue 11/49:10 amSAN - SFO
Nonstop1h 51mMultiple Airlines
Deal found 10/18$85
This Kiwi.com deal was found by Cheapflights users on 10/19. 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.
Thu 11/133:14 pmSFO - SAN
Nonstop1h 43mMultiple Airlines
Wed 11/198:08 pmSAN - SFO
Nonstop1h 53mMultiple Airlines
Deal found 10/19$87
This Frontier deal was found by Cheapflights users on 10/18. 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.
Sun 10/269:08 amSFO - SAN
Nonstop1h 48mFrontier
Fri 11/74:45 pmSAN - SFO
Nonstop1h 52mFrontier
Deal found 10/18$88
This Alaska Airlines deal was found by Cheapflights users on 10/19. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/97:00 amSFO - SAN
Nonstop1h 40mAlaska Airlines
Tue 11/112:03 pmSAN - SFO
Nonstop1h 44mAlaska Airlines
Deal found 10/19$89

Cheap flight deals from Fremont to San Diego

Keep the following information in mind while searching for Fremont to San Diego flight deals. Data was last updated October 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$77
(Southwest)

One-way from

$39
(United Airlines)

Popular in

September

Cheapest in

January

Average price

$167
Provider with most accurate pricing for San Francisco-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Francisco-San Diego flights.
Search Deals
From Fremont to San Diego
Search Deals
One-way flight from Fremont to San Diego
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Fremont to San Diego 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 October 20, 2025.
Use the filters below to find and compare flights from Fremont to San Diego that are best for you.

Fly from

Fremont

Fly to

San Diego

Route

Depart

Return

Price

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Wed 11/19

7:00 am-8:40 am

Nonstop1h 40m

San Diego

Thu 12/4

6:15 am-8:06 am

Nonstop1h 51m

$77

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Wed 12/10

3:05 pm-4:35 pm

Nonstop1h 30m

San Diego

Sat 12/13

6:35 am-12:00 pm

1 stop5h 25m

$107

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Sat 12/6

10:10 am-5:55 pm

2 stops7h 45m

San Diego

Mon 12/8

7:00 am-8:45 am

Nonstop1h 45m

$112

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Sun 11/2

5:30 am-7:06 am

Nonstop1h 36m

San Diego

Sun 11/9

7:58 am-9:45 am

Nonstop1h 47m

$115

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Tue 2/10

10:12 am-11:51 am

Nonstop1h 39m

San Diego

Sat 2/14

12:30 pm-2:05 pm

Nonstop1h 35m

$117

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Sun 11/23

7:00 am-8:39 am

Nonstop1h 39m

San Diego

Wed 12/3

7:15 am-9:10 am

Nonstop1h 55m

$117

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Tue 11/4

7:00 am-8:40 am

Nonstop1h 40m

San Diego

Thu 11/6

9:59 pm-11:46 pm

Nonstop1h 47m

$117

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Sat 12/6

11:35 am-4:12 pm

1 stop4h 37m

San Diego

Tue 12/9

9:10 am-11:03 am

Nonstop1h 53m

$123

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Tue 11/18

11:41 am-1:23 pm

Nonstop1h 42m

San Diego

Sat 11/22

8:59 pm-10:42 pm

Nonstop1h 43m

$127

San FranciscoSan Diego

SFO - SAN

SFOSAN

San Francisco

Sat 12/13

9:57 pm-11:30 pm

Nonstop1h 33m

San Diego

Wed 12/17

8:05 am-1:36 pm

1 stop5h 31m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/18

Showing 1-10 of 24 results
1
2
3

Best time to book a flight from Fremont to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego 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 Diego

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

Use this chart to determine the optimal time to book a round-trip flight from Fremont to San Diego. Price data was last updated on October 17, 2025.

Booking 72 days in advance of your planned departure date is, on average, the best time to get cheap flights from Fremont to San Diego. 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 Diego?

Currently, February is the cheapest month in which you can book a flight from Fremont to San Diego (average of $26). Flying from Fremont to San Diego in September is currently the most expensive (average of $64). 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 SAN?

Find hourly flight availability from Fremont to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 20, 2025.

One of the essential ways to save on airfare from Fremont to San Diego is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the afternoon could potentially save you up to 25% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Fremont to San Diego. Price data was last updated on December 16, 2024.

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

Weekly flight availability from Fremont to San Diego

Explore weekly flight availability from Fremont to San Diego. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated October 20, 2025.

The most flights from FR8 to SAN are scheduled on a Monday (83 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (48 on average).

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 Diego. Reviews last updated October 20, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Hawaiian Airlines from Fremont to San Diego 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
11,134 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
11,134 reviews
Alaska Airlines
8.0
Very good
11,134 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
11,134 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Hawaiian Airlines
7.8
Good
2,785 reviews
Alaska Airlines
8.0
Very good
11,134 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,993 reviews
Alaska Airlines
8.0
Very good
11,134 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Frontier
5.8
Fair
3,130 reviews
Alaska Airlines
8.0
Very good
11,134 reviews

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

Find useful and relevant information for your journey from Fremont to San Diego. 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 into for flights to San Diego from Fremont?

    For a flight from Fremont to San Diego, you will be flying into San Diego. San Diego (SAN) is just 2.6 mi from the center of the city. San Diego is the only San Diego airport and it handles 66 inbound flights from Fremont per day. 8 airlines have flights to San Diego from Fremont on a regular basis.

  • How popular is this Fremont to San Diego flight route?

    Within the past month, 192 users have taken a look at flights from Fremont to San Diego.

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

    There are many flights that can get you from Fremont to San Diego in 1h 30m. Fly via Alaska Airlines or Southwest to get the fastest option. There are 446 mi between Fremont and San Diego. Most flights are nonstop.

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

    To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $39. Alaska Airlines flights start at $39 while deals on United Airlines start at $39 one-way.

  • What are the most reliable airlines from Fremont to San Diego?

    Before booking your flight to San Diego from Fremont, check out the most reliable airlines to get you to your destination on time: Air China (89%), United Airlines (84%), Air Canada( 83%).

  • What are the cheapest flights from Fremont to San Diego?

    While on average a flight from Fremont to San Diego is generally $375, our data shows the cheapest flight currently is $38. When looking at the most popular route, (San Francisco - San Diego), you can expect to pay $54 for that flight.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Fremont to San Diego (average of $26). Flying from Fremont to San Diego in September is currently the most expensive (average of $64). 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

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
Coronado
La Mesa
Poway
Lemon Grove
Imperial Beach
National City

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Fremont to San Diego

See prices for flight routes from nearby airports that may be better suited for you.
San Francisco to Los Angeles flights
Los Angeles to San Francisco flights
San Francisco to Las Vegas flights
San Francisco to Ontario flights
San Jose to Los Angeles flights
San Francisco to Santa Ana flights
Los Angeles to Las Vegas flights
Santa Ana to San Francisco flights
Burbank to Las Vegas flights
Los Angeles to San Jose flights
San Jose to Las Vegas flights
Ontario to San Francisco flights
San Francisco to San Diego flights
Oakland to Las Vegas flights
Santa Ana to Las Vegas flights
San Diego to Las Vegas flights
San Francisco to Palm Springs flights
Sacramento to Los Angeles flights
Burbank to San Francisco flights
Sacramento to Las Vegas flights
Los Angeles to Sacramento flights
San Francisco to Burbank flights
San Diego to San Francisco flights
Ontario to Las Vegas flights
Las Vegas to Los Angeles flights
San Jose to Santa Ana flights
Los Angeles to Reno flights
Santa Ana to San Jose flights
San Jose to Ontario flights
Ontario to San Jose flights
Sacramento to Ontario flights
Ontario to Sacramento flights
San Francisco to Long Beach flights
San Jose to San Diego flights
Fresno to Las Vegas flights
Reno to Las Vegas flights
Las Vegas to Burbank flights
Los Angeles to San Diego flights
Sacramento to San Diego flights
San Diego to San Jose flights
Las Vegas to Santa Ana flights
Long Beach to Las Vegas flights
Las Vegas to San Francisco flights
Reno to Los Angeles flights
Santa Ana to Sacramento flights
Sacramento to Santa Ana flights
San Diego to Sacramento flights
Las Vegas to San Diego flights
Santa Rosa to Las Vegas flights
Oakland to Los Angeles flights

Top 8 airlines flying from Fremont to San Diego

Discover the top 8 airlines that operate flights from Fremont to San Diego. 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 October 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$28Average$110FlexibilityNo cancel feeOn-time65%
FrontierCheapest$29Average$97FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$38Average$160FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$57Average$184FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$58Average$193FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$77Average$205FlexibilityNo cancel feeOn-time63%
DeltaCheapest$98Average$196FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$185Average$319FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.