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Cheap flights from Portsmouth to Fremont from £386

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
8 Aug — 15 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap 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 9 July 2026.

Sat 5/1217:30
SOU
-
SFO
1 stop26h 15m
Delta
Sun 13/1206:00
SFO
-
SOU
2 stops18h 10m
Delta
Deal found 9/7£624
Sat 5/1209:25
SOU
-
SFO
1 stop34h 20m
KLM
Sun 13/1213:50
SFO
-
SOU
1 stop34h 20m
KLM
Deal found 9/7£654
Mon 31/809:05
SOU
-
SFO
1 stop34h 40m
Delta
Tue 8/913:45
SFO
-
SOU
1 stop19h 05m
Delta
Deal found 5/7£666
Tue 1/909:05
SOU
-
SFO
2 stops19h 14m
Delta
Tue 8/922:59
SFO
-
SOU
2 stops33h 51m
Delta
Deal found 5/7£671
Mon 31/817:20
SOU
-
SFO
1 stop26h 25m
Delta
Sun 6/907:00
SFO
-
SOU
2 stops17h 35m
Delta
Deal found 5/7£677
Sun 30/809:15
SOU
-
SFO
2 stops22h 32m
Delta
Mon 7/922:59
SFO
-
SOU
2 stops33h 51m
Delta
Deal found 5/7£680
Sat 22/809:20
SOU
-
SFO
1 stop14h 35m
Aer Lingus
Thu 27/817:35
SFO
-
SOU
1 stop15h 15m
Aer Lingus
Deal found 7/7£682
Thu 20/818:05
SOU
-
SFO
1 stop25h 40m
KLM
Thu 27/813:45
SFO
-
SOU
1 stop19h 50m
KLM
Deal found 6/7£700
Sat 22/809:15
SOU
-
SFO
2 stops20h 32m
KLM
Thu 27/807:00
SFO
-
SOU
2 stops17h 45m
KLM
Deal found 9/7£709

Find flight deals from Portsmouth to Fremont

Keep the following information in mind while searching for Portsmouth to Fremont flight deals. Data was last updated 9 July 2026.

Round-trip from

£624

One-way from

£386

Popular in

December

Cheapest in

February

Average price

£614
Delta
  • Delta
  • 5/12-13/12
  • 3 total stops
  • 44h 25m total
  • Portsmouth to Fremont
Search Deals
Aer Lingus
  • Aer Lingus
  • 12/9
  • 1 total stop
  • 14h 35m total
  • Portsmouth to Fremont
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (£6 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

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 9 July 2026.
Use the filters below to find and compare flights from Portsmouth to Fremont that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Sat 5/12

09:25-11:45

1 stop34h 20m

San Francisco

Sun 13/12

13:50-08:10

1 stop34h 20m

£654

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 2/9

09:15-17:18

2 stops16h 03m

San Francisco

Tue 8/9

22:59-16:50

2 stops33h 51m

£671

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Sun 30/8

17:30-11:45

1 stop26h 15m

San Francisco

Tue 8/9

14:15-16:50

2 stops18h 35m

£677

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Thu 20/8

09:15-11:45

1 stop34h 30m

San Francisco

Thu 27/8

07:00-08:45

2 stops17h 45m

£707
Fastest return journey

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Tue 15/12

09:20-15:35

1 stop14h 15m

San Francisco

Mon 28/12

20:35-08:25

2 stops27h 50m

£730

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Fri 6/11

17:05-15:35

1 stop30h 30m

San Francisco

Tue 10/11

17:20-19:30

1 stop18h 10m

£755

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Thu 3/12

17:05-15:35

1 stop30h 30m

San Francisco

Mon 7/12

17:20-19:30

1 stop18h 10m

£756
Cheapest one-way

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Sat 12/9

09:20-15:55

1 stop14h 35m

£386

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Sat 12/9

19:25-14:05

3 stops50h 40m

£423
Fastest single journey

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 30/11

09:20-15:35

1 stop14h 15m

£424

Flights are sorted by cheapest return flights first.

Deals found on 5/7

Showing 1-10 of 16 resultsSorted by cheapest first
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 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 9 July 2026.

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.

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 9 July 2026.

The most flights from P0R to FR8 are scheduled on a Monday (42 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (37 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 15m. 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: Air Canada (83%), Austrian Airlines (83%), United Airlines( 83%).

  • What are the cheapest flights from Portsmouth to Fremont?

    The cheapest flight price from Portsmouth to Fremont is £343. On average you can expect to pay £1,679. The most popular route, (Southampton Eastleigh - San Francisco), can usually be booked for £682.

  • 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.

See more FAQs

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Alternative routes for Portsmouth to Fremont

See prices for flight routes from nearby airports that may be better suited for you.
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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 9 July 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£321Average£680FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
SWISSCheapest£350Average£458FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aer LingusCheapest£355Average£579FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£360Average£479FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
TAP AIR PORTUGALCheapest£360Average£471FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£368Average£535FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Brussels AirlinesCheapest£373Average£533FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Austrian AirlinesCheapest£375Average£500FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
Air CanadaCheapest£378Average£575FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapest£380Average£548FlexibilityNo cancel feeOn-time76%
Search Lufthansa 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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