Cheap flights from Portsmouth to Fremont from £439

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Portsmouth to Fremont

Keep the following information in mind while searching for Portsmouth to Fremont flight deals. Data was last updated 18 September 2025.

Round-trip from

£484

One-way from

£439

Popular in

July

Cheapest in

February

Average price

£421
Delta
  • Delta
  • 1/11-7/11
  • 4 total stops
  • 44h 20m total
  • Portsmouth to Fremont
British Airways
  • British Airways
  • 10/11
  • 1 total stop
  • 14h 05m total
  • Portsmouth to Fremont
Highest demand for flights based on searches. 15% potential increase in price (£63 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from Portsmouth to Fremont

Cheapest flights from Portsmouth to Fremont
Explore the most affordable flight options available from Portsmouth to Fremont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Sat 1/1109:25SOU - SFO
2 stops20h 05mDelta
Fri 7/1100:35SFO - SOU
2 stops24h 15mDelta
Deal found 17/9£484
Sat 1/1109:25SOU - SFO
2 stops20h 05mKLM
Sat 8/1113:55SFO - SOU
1 stop34h 15mKLM
Deal found 17/9£493
Sat 1/1109:30SOU - SFO
1 stop14h 05mAer Lingus
Sat 8/1117:20SFO - SOU
1 stop18h 20mAer Lingus
Deal found 17/9£503
Fri 7/1109:30SOU - SFO
1 stop14h 05mBritish Airways
Tue 11/1117:20SFO - SOU
1 stop18h 20mBritish Airways
Deal found 15/9£585
Tue 30/919:55SOU - SFO
2 stops29h 30mBritish Airways
Tue 7/1017:40SFO - SOU
1 stop17h 50mBritish Airways
Deal found 16/9£747
Sat 1/1117:30SOU - SFO
3 stops29h 05mMultiple Airlines
Sat 8/1116:40SFO - SOU
3 stops31h 30mMultiple Airlines
Deal found 17/9£867

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to Fremont 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 858,174 searches. Data last updated 18 September 2025.
Use the filters below to find and compare flights from Portsmouth to Fremont that are best for you.

Fly from

Portsmouth

Fly to

Fremont

Route

Depart

Return

Price

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Sat 1/11

09:25-22:30

2 stops20h 05m

San Francisco

Fri 7/11

00:35-08:50

2 stops24h 15m

£484

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Sat 1/11

09:25-22:30

2 stops20h 05m

San Francisco

Sat 8/11

07:15-08:50

2 stops17h 35m

£484

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Sat 1/11

09:30-16:35

1 stop14h 05m

San Francisco

Sat 8/11

17:20-19:40

1 stop18h 20m

£503

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Fri 7/11

09:30-15:35

1 stop14h 05m

San Francisco

Tue 11/11

17:20-19:40

1 stop18h 20m

£585

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Tue 30/9

19:55-17:25

2 stops29h 30m

San Francisco

Tue 7/10

17:40-19:30

1 stop17h 50m

£747

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Sat 1/11

09:40-12:50

2 stops34h 10m

San Francisco

Sat 8/11

16:35-11:50

3 stops35h 15m

£955

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 10/11

09:30-15:35

1 stop14h 05m

£439

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Thu 6/11

19:55-15:00

2 stops27h 05m

£545

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 31/12

08:40-15:00

2 stops38h 20m

£607

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Tue 7/10

09:10-15:55

1 stop14h 45m

£630

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 14 results
1
2

Best time to book a flight from Portsmouth to Fremont

Have a flexible travel schedule? Discover the best time to fly to Fremont from Portsmouth with our price prediction graph.
Estimated return 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 Portsmouth to Fremont

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

Currently, February is the cheapest month in which you can book a flight from Portsmouth to Fremont (average of £538). Flying from Portsmouth to Fremont in July is currently the most expensive (average of £803). 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 P0R to FR8?

Find hourly flight availability from Portsmouth to Fremont. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 September 2025.

When flying from Portsmouth to Fremont, 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 Portsmouth to Fremont?

Use this chart to determine the cheapest time to fly return from Portsmouth to Fremont. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their Portsmouth to Fremont flight should consider departing on Friday mornings 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.

Weekly flight availability from Portsmouth to Fremont

Explore weekly flight availability from Portsmouth to Fremont. 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 18 September 2025.

The most flights from P0R to FR8 are scheduled on a Monday (42 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (36 on average).

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Fremont. 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 Portsmouth to Fremont?

    Departing from Portsmouth to Fremont will take you 14h 05m. The distance from Portsmouth to Fremont is about 5349 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most reliable airlines from Portsmouth to Fremont?

    Before booking your flight to Fremont from Portsmouth, check out the most reliable airlines to get you to your destination on time: KLM (86%), Air France (86%), Delta( 86%).

  • What are the cheapest flights from Portsmouth to Fremont?

    The cheapest flight price from Portsmouth to Fremont is £373. On average you can expect to pay £1,776. The most popular route, (Southampton Eastleigh - San Francisco), can usually be booked for £476.

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

    Yes. In addition to deals on Portsmouth to Fremont flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portsmouth to Fremont?

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

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

    Yes. Cheapflights offers flight deals from Portsmouth to Fremont 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 Portsmouth to Fremont?

    Currently, February is the cheapest month in which you can book a flight from Portsmouth to Fremont (average of £538). Flying from Portsmouth to Fremont in July is currently the most expensive (average of £803). 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

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 Portsmouth to Fremont

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Portsmouth to Fremont

Discover the top 10 airlines that operate flights from Portsmouth to Fremont. 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 858,174 searches. Data last updated 18 September 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£234Average£483FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest£332Average£554FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
TAP AIR PORTUGALCheapest£345Average£460FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
SWISSCheapest£347Average£432FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aer LingusCheapest£348Average£551FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£349Average£540FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Brussels AirlinesCheapest£353Average£470FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Air CanadaCheapest£354Average£483FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Virgin AtlanticCheapest£358Average£497FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£362Average£580FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portsmouth to Fremont?

Cheapflights makes it easy to find Portsmouth to Fremont flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Fremont?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Fremont from Portsmouth.

Can Cheapflights find flights from Portsmouth to Fremont with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Portsmouth to Fremont, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Portsmouth to Fremont become cheaper?

Yes, Cheapflights offers price alerts on Portsmouth to Fremont flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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.