How long is the flight from Portsmouth to San Francisco?

Departing from Portsmouth to San Francisco will take you 26h 10m. The distance from Portsmouth to San Francisco is about 5349 mi. This flight may include one or multiple stops.

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.

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).

What are the cheapest flights from Portsmouth to San Francisco?

Looking at all options, your cheapest flight can be booked for £360. While the most popular route (Southampton Eastleigh - San Francisco) can be booked for £466 on average, our data indicates £1,410 when flying from Portsmouth to San Francisco.

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 (73%), Austrian Airlines (73%), United Airlines (73%).

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 11.0 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.

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.

£451+ Cheap Flights from Portsmouth to San Francisco

Cheap flight deals from Portsmouth to San Francisco

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 17 September 2026.

Wed 18/1109:20 -

1 stop14h 15m

Tue 1/1217:20 -

1 stop18h 10m

Deal found 15/9£466

Wed 18/1109:20 -

1 stop14h 15m

Mon 30/1117:20 -

1 stop18h 10m

Deal found 15/9£480

Wed 23/920:00 -

1 stop27h 50m

Fri 9/1017:35 -

1 stop15h 15m

Deal found 13/9£494

Fri 13/1112:25 -

1 stop35h 10m

Sun 15/1117:20 -

1 stop18h 10m

Deal found 14/9£524

Wed 28/1017:35 -

1 stop26h 10m

Wed 4/1113:50 -

1 stop19h 15m

Deal found 13/9£524

Wed 18/1108:40 -

1 stop35h 05m

Tue 1/1207:00 -

2 stops17h 10m

Deal found 15/9£535

Wed 28/1017:35 -

1 stop26h 10m

Wed 4/1109:54 -

2 stops23h 11m

Deal found 13/9£536

Wed 18/1108:40 -

2 stops22h 51m

Mon 30/1113:50 -

1 stop19h 10m

Deal found 15/9£538

Thu 29/1017:35 -

2 stops29h 43m

Thu 5/1113:50 -

1 stop35h 05m

Deal found 14/9£540

Sun 1/1109:30 -

1 stop34h 15m

Mon 1/313:50 -

1 stop19h 10m

Deal found 15/9£561

Find flight deals from Portsmouth to San Francisco

Round-trip from	£466
One-way from	£451
Popular in	December
Cheapest in	February
Average price	£505

British Airways
17/11-30/11
2 total stops
32h 25m total
Portsmouth to San Francisco

Search Deals

British Airways
22/2-31/12
1 total stop
14h 15m total
Portsmouth to San Francisco

Search Deals

High demand for flights, 0% potential price rise

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

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Cheapflights Fare Finder

Use the filters below to find and compare flights from Portsmouth to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Sun 25/10

09:20-16:35

1 stop14h 15m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£457

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Mon 30/11

20:00-15:35

1 stop27h 35m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£460

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Wed 2/12

09:20-15:35

1 stop14h 15m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£463

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Tue 1/12

09:20-15:35

1 stop14h 15m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£464

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Sun 29/11

11:40-14:55

2 stops59h 15m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£492

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Wed 28/10

17:35-12:45

1 stop26h 10m

San Francisco

Wed 4/11

09:54-17:05

2 stops23h 11m

£536

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Wed 18/11

08:40-23:31

2 stops22h 51m

San Francisco

Mon 30/11

13:50-17:00

1 stop19h 10m

£538

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Fri 13/11

08:40-23:57

2 stops23h 17m

San Francisco

Sun 15/11

13:50-17:05

1 stop19h 15m

£540

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Thu 28/1

20:00-15:35

1 stop27h 35m

San Francisco

Mon 1/2

17:25-18:45

2 stops17h 20m

£544

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Fri 13/11

20:00-14:55

2 stops26h 55m

San Francisco

Sun 15/11

17:20-19:30

1 stop18h 10m

£555

Flights are sorted by cheapest return flights first.

Deals found on 12/9

Showing 1-10 of 15 resultsSorted by cheapest first

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.

SOU-SFO

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 San Francisco

P0R-SFO

SOU-SFO

What is the cheapest time of day to fly from P0R to SFO?

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.

Weekly flight availability from Portsmouth to San Francisco

The most flights from P0R to SFO are scheduled on a Wednesday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (32 on average).

Related info for your journey

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 11.0 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.
How long is the flight from Portsmouth to San Francisco?
Departing from Portsmouth to San Francisco will take you 26h 10m. The distance from Portsmouth to San Francisco is about 5349 mi. This flight may include one or multiple stops.
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 (73%), Austrian Airlines (73%), United Airlines (73%).
What are the cheapest flights from Portsmouth to San Francisco?
Looking at all options, your cheapest flight can be booked for £360. While the most popular route (Southampton Eastleigh - San Francisco) can be booked for £466 on average, our data indicates £1,410 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.

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Top 10 airlines flying from Portsmouth to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£275	Average£668	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
SWISS	Cheapest£349	Average£532	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
TAP AIR PORTUGAL	Cheapest£359	Average£489	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Virgin Atlantic	Cheapest£367	Average£558	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Brussels Airlines	Cheapest£372	Average£509	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Austrian Airlines	Cheapest£374	Average£507	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
Air Canada	Cheapest£377	Average£621	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Scandinavian Airlines	Cheapest£377	Average£486	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Lufthansa	Cheapest£378	Average£549	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£383	Average£542	FlexibilityNo cancel fee	On-time70%	Search British Airways flights

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

Cheapflights makes it easy to find Portsmouth to San Francisco 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 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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Cheap flights from Portsmouth to San Francisco from £451

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/2. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to San Francisco

Cheapest flights from Portsmouth to San FranciscoExplore 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 17 September 2026.

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 17 September 2026.

Best flights from Portsmouth to San FranciscoDiscover carefully curated flight deals from Portsmouth to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 September 2026.

Discover carefully curated flight deals from Portsmouth to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 September 2026.

Last-minute flights from Portsmouth to San FranciscoDiscover last-minute flight deals from Portsmouth to San Francisco. Data last updated 17 September 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to San Francisco. Data last updated 17 September 2026 and is based on user searches.

One-way flights from Portsmouth to San FranciscoSearch for one-way flight options from Portsmouth to San Francisco. Find affordable one-way fares based on user searches. Data last updated 17 September 2026.

Search for one-way flight options from Portsmouth to San Francisco. Find affordable one-way fares based on user searches. Data last updated 17 September 2026.

Find flight deals from Portsmouth to San Francisco

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Use the filters below to find and compare flights from Portsmouth to San Francisco that are best for you.

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.

Cheapflights Insights

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 17 September 2026.

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.

Weekly flight availability from Portsmouth to San Francisco

The most flights from P0R to SFO are scheduled on a Wednesday (38 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (32 on average).

Related info for your journey

What airport do you fly into for flights to San Francisco from Portsmouth?

How long is the flight from Portsmouth to San Francisco?

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

What are the cheapest flights from Portsmouth to San Francisco?

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

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

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

Travelling to a place near San Francisco?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portsmouth to San Francisco

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Complete your trip

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Direct flights to California

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Portsmouth and San Francisco flights

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Portsmouth to San Francisco flights

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Top 10 airlines flying from Portsmouth to San Francisco

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

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

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

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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 17 September 2026.

Best flights from Portsmouth to San Francisco
Discover carefully curated flight deals from Portsmouth to San Francisco that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 September 2026.

Last-minute flights from Portsmouth to San Francisco
Discover last-minute flight deals from Portsmouth to San Francisco. Data last updated 17 September 2026 and is based on user searches.

One-way flights from Portsmouth to San Francisco
Search for one-way flight options from Portsmouth to San Francisco. Find affordable one-way fares based on user searches. Data last updated 17 September 2026.