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Cheap flights from Portsmouth to San Francisco from £621

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SFO
26 Jan — 2 Feb1
1 adult

Cheap flight deals from Portsmouth to San Francisco

Discover tips and strategies to find the most affordable flight options for your journey from Portsmouth (P0R) to San Francisco (SFO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 21 January 2025.

Round-trip from

£621

Popular in

August

Cheapest in

June

Average price

£537
KLM
  • KLM
  • 18/6-26/6
  • 2 total stops
  • 61h 10m total
  • Portsmouth to San Francisco
Highest demand for flights based on searches. 15% potential increase in price (£99 potential increase over avg. return price).
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Average for round-trip flights in January 2025

Find flight deals from Portsmouth to San Francisco

Cheapest flights from Portsmouth to San Francisco
Explore the most affordable flight options available from Portsmouth to San Francisco. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 January 2025.

Wed 18/617:35SOU - SFO
1 stop26h 10mKLM
Thu 26/613:45SFO - SOU
1 stop35h 00mKLM
Deal found 21/1£621
Wed 18/617:35SOU - SFO
1 stop26h 10mDelta
Thu 26/611:05SFO - SOU
2 stops21h 55mDelta
Deal found 21/1£624

Find flights from Portsmouth to San Francisco within your budget

Customise your flight search to find flights from Portsmouth to San Francisco 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 21 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 18/6

17:35-11:45

1 stop26h 10m

San Francisco

Thu 26/6

13:45-08:45

1 stop35h 00m

£621

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 18/6

17:35-11:45

1 stop26h 10m

San Francisco

Thu 26/6

11:05-17:00

2 stops21h 55m

£624

Flights are sorted by cheapest return flights first.

Deals found on 21/1

Best time to book a flight from Portsmouth to San Francisco

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

Travel insights for flights from Portsmouth to San Francisco

Get recent, data-driven insights about flights from Portsmouth to San Francisco including ideal travel times, pricing trends, and more.

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

Currently, February is the cheapest month in which you can book a flight from Portsmouth to San Francisco (average of £538). Flying from Portsmouth to San Francisco 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 SFO?

Find hourly flight availability from Portsmouth to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 January 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to San Francisco as you normally would.

What is the cheapest day to fly from Portsmouth to San Francisco?

Use this chart to determine the cheapest time to fly return from Portsmouth to San Francisco. Price data was last updated on 5 May 2024.

Travellers seeking maximum savings on their Portsmouth to San Francisco 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 San Francisco

Explore weekly flight availability from Portsmouth to San Francisco. 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 21 January 2025.

The most flights from P0R to SFO are scheduled on a Monday (31 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (26 on average).

Rainfall in San Francisco by month

Plan your trip to San Francisco by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 inches per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.

Temperature in San Francisco by month

Plan your trip to San Francisco by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing San Francisco

Get insights into the airlines that provide service to San Francisco. 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 Francisco. Reviews last updated 21 January 2025.
8.0
Very Good
8,521 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

8.0
Very Good
8,521 reviews
8.0
Very Good
8,521 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

7.8
Good
1,341 reviews
8.0
Very Good
8,521 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Food

7.3

Crew

8.6

Overall

8.0

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

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

    For a flight from Portsmouth to San Francisco, you will be flying into San Francisco. San Francisco (SFO) is just 11.8 mi from the center of the city. San Francisco is the only San Francisco airport and it handles 0 inbound flights from Portsmouth per day. 19 airlines have flights to San Francisco from Portsmouth on a regular basis.

  • What are the most reliable airlines from Portsmouth to San Francisco?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portsmouth to San Francisco on time: Air Canada (63%), Austrian Airlines (63%), United Airlines (63%).

  • What are the cheapest flights from Portsmouth to San Francisco?

    Looking at all options, your cheapest flight can be booked for £434. While the most popular route (Southampton Eastleigh - San Francisco) can be booked for £489 on average our data indicates £1,858 when flying from Portsmouth to San Francisco.

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

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

  • How can I find direct flights from Portsmouth to San Francisco?

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

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

    Yes. Cheapflights offers flight deals from Portsmouth to San Francisco 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 San Francisco?

    Currently, February is the cheapest month in which you can book a flight from Portsmouth to San Francisco (average of £538). Flying from Portsmouth to San Francisco 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

Travelling to a place near Portsmouth?

Book flights to Portsmouth if you plan to visit one of these locations
Santa Cruz
San Mateo
Los Banos
Vallejo
South San Francisco
Pacific Grove
Union City

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portsmouth to San Francisco

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

Top 10 airlines flying from Portsmouth to San Francisco

Discover the top 10 airlines that operate flights from Portsmouth to San Francisco. 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 21 January 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£314Average£528FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£327Average£496FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
TAP AIR PORTUGALCheapest£376Average£494FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
SWISSCheapest£379Average£508FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Virgin AtlanticCheapest£385Average£588FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Scandinavian AirlinesCheapest£386Average£544FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
British AirwaysCheapest£387Average£522FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£404Average£584FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Brussels AirlinesCheapest£409Average£543FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
Austrian AirlinesCheapest£412Average£516FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Portsmouth to San Francisco?

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

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 San Francisco from Portsmouth.

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

Need flexible booking options for your flight to San Francisco from Portsmouth? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Not ready to book yet? You can track prices for flights from Portsmouth to San Francisco on Cheapflights with our Price Alert feature and get notified when better prices are available.

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