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Cheap flights from Portsmouth to Fremont from £495

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
30 Nov — 7 Dec1
1 adult
1 adult, Economy, 0 bags

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 31 October 2025.

Round-trip from

£495

Popular in

July

Cheapest in

September

Average price

£496
Delta
  • Delta
  • 12/1-12/2
  • 2 total stops
  • 45h 20m total
  • Portsmouth to Fremont
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£64 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Portsmouth to Fremont

Enter your travel dates to find the best prices.

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 31 October 2025.

Mon 15/1218:05SOU - SFO
1 stop25h 45mVirgin Atlantic
Mon 22/1206:00SFO - SOU
2 stops18h 10mVirgin Atlantic
Deal found 31/10£631
Mon 15/1209:30SOU - SFO
1 stop14h 05mAer Lingus
Mon 22/1217:20SFO - SOU
1 stop18h 20mAer Lingus
Deal found 31/10£664
Mon 15/1218:05SOU - SFO
3 stops28h 55mBritish Airways
Mon 22/1217:20SFO - SOU
2 stops33h 35mBritish Airways
Deal found 31/10£785
Sat 13/1209:25SOU - SFO
2 stops21h 48mKLM
Sat 20/1213:55SFO - SOU
1 stop19h 30mKLM
Deal found 29/10£805
Sat 13/1209:25SOU - SFO
2 stops21h 48mVirgin Atlantic
Sat 20/1212:24SFO - SOU
2 stops21h 01mVirgin Atlantic
Deal found 29/10£848
Sat 13/1209:30SOU - SFO
1 stop14h 05mAer Lingus
Sat 20/1217:20SFO - SOU
1 stop14h 15mAer Lingus
Deal found 29/10£914
Wed 12/1119:55SOU - SFO
2 stops27h 05mBritish Airways
Wed 19/1117:20SFO - SOU
1 stop18h 20mBritish Airways
Deal found 29/10£941
Mon 15/1218:05SOU - SFO
1 stop25h 45mDelta
Sun 21/1200:10SFO - SOU
2 stops24h 00mDelta
Deal found 31/10£1,058
Sat 13/1209:30SOU - SFO
2 stops17h 15mBritish Airways
Sat 20/1217:20SFO - SOU
3 stops40h 15mBritish Airways
Deal found 29/10£1,146
Mon 15/1214:15SOU - SFO
3 stops33h 20mMultiple Airlines
Mon 22/1217:20SFO - SOU
3 stops31h 05mMultiple Airlines
Deal found 31/10£1,267
Sat 13/1209:25SOU - SFO
2 stops21h 48mDelta
Fri 19/1200:10SFO - SOU
2 stops24h 40mDelta
Deal found 29/10£1,476

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 31 October 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

Wed 14/1

09:25-11:50

1 stop34h 25m

San Francisco

Thu 12/2

13:55-17:00

1 stop19h 05m

£495

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Tue 13/1

09:25-11:50

1 stop34h 25m

San Francisco

Thu 12/2

13:55-17:00

1 stop19h 05m

£495

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 14/1

17:35-11:50

1 stop26h 15m

San Francisco

Mon 9/2

08:28-17:00

2 stops24h 32m

£498

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Tue 13/1

17:30-11:50

1 stop26h 20m

San Francisco

Wed 11/2

13:55-08:25

1 stop34h 30m

£498

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 12/1

17:35-11:50

1 stop26h 15m

San Francisco

Tue 10/2

13:55-08:25

1 stop34h 30m

£498

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 12/1

17:35-11:50

1 stop26h 15m

San Francisco

Mon 9/2

23:00-08:50

2 stops25h 50m

£498

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 12/1

17:35-11:50

1 stop26h 15m

San Francisco

Wed 11/2

13:55-17:00

1 stop19h 05m

£498

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 14/1

09:25-11:50

1 stop34h 25m

San Francisco

Tue 10/2

06:05-17:00

2 stops26h 55m

£498

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Tue 13/1

09:25-11:50

1 stop34h 25m

San Francisco

Sun 8/2

00:47-08:50

2 stops24h 03m

£498

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 12/1

17:35-11:50

1 stop26h 15m

San Francisco

Sun 15/2

13:55-17:00

1 stop19h 05m

£500

Flights are sorted by cheapest return flights first.

Deals found on 31/10

Showing 1-10 of 18 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, December is the cheapest month in which you can book a flight from Portsmouth to Fremont (average of £344). Flying from Portsmouth to Fremont in July is currently the most expensive (average of £465). 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 31 October 2025.

Unlike at midday, when flights are generally more expensive, you can save up to 19% on flights from Portsmouth to Fremont by exploring options for tickets in the evening.

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 evenings 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.

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 34h 25m. The distance from Portsmouth to Fremont is about 5349 mi.

  • 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: Air New Zealand (87%), KLM (85%), Air France( 85%).

  • What are the cheapest flights from Portsmouth to Fremont?

    The cheapest flight price from Portsmouth to Fremont is £342. On average you can expect to pay £2,123. The most popular route, (Southampton Eastleigh - San Francisco), can usually be booked for £501.

  • 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, December is the cheapest month in which you can book a flight from Portsmouth to Fremont (average of £344). Flying from Portsmouth to Fremont in July is currently the most expensive (average of £465). 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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Alternative routes for Portsmouth to Fremont

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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 31 October 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£242Average£498FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£342Average£503FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapest£344Average£562FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Aer LingusCheapest£357Average£573FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£358Average£484FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£362Average£537FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Brussels AirlinesCheapest£362Average£486FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
SWISSCheapest£364Average£448FlexibilityNo cancel feeOn-time79%
Search SWISS flights
FinnairCheapest£377Average£498FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£379Average£465FlexibilityNo cancel feeOn-time75%
Search KLM 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.

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