How long is the flight from Portsmouth to San Francisco?

Departing from Portsmouth to San Francisco will take you 14h 35m. 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 £396. While the most popular route (Southampton Eastleigh - San Francisco) can be booked for £684 on average, our data indicates £1,176 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 (87%), Austrian Airlines (87%), United Airlines (87%).

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. 18 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.

£410+ 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 20 April 2026.

Tue 2/609:20

SOU

SFO

2 stops23h 58m

Aer Lingus

Tue 9/617:40

SFO

SOU

1 stop17h 50m

Aer Lingus

Deal found 18/4£684

Wed 6/509:05

SOU

SFO

2 stops21h 42m

Delta

Wed 13/506:15

SFO

SOU

2 stops18h 20m

Delta

Deal found 18/4£702

Wed 6/509:20

SOU

SFO

1 stop14h 35m

Aer Lingus

Wed 13/517:40

SFO

SOU

1 stop17h 50m

Aer Lingus

Deal found 15/4£704

Wed 25/1109:20

SOU

SFO

1 stop14h 15m

British Airways

Sun 29/1118:20

SFO

SOU

1 stop14h 15m

British Airways

Deal found 18/4£750

Tue 2/609:20

SOU

SFO

2 stops23h 58m

Multiple Airlines

Tue 9/613:56

SFO

SOU

2 stops21h 34m

Multiple Airlines

Deal found 18/4£752

Mon 1/609:20

SOU

SFO

2 stops22h 49m

Aer Lingus

Mon 8/617:35

SFO

SOU

1 stop17h 55m

Aer Lingus

Deal found 17/4£754

Find flight deals from Portsmouth to San Francisco

Round-trip from	£684
One-way from	£410
Popular in	December
Cheapest in	February
Average price	£493

Aer Lingus
2/6-9/6
3 total stops
41h 48m total
Portsmouth to San Francisco

Search Deals

12/10
2 total stops
52h 35m total
Portsmouth to San Francisco

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (£16 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 2026

Search Deals

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

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 6/5

09:05-22:47

2 stops21h 42m

San Francisco

Wed 13/5

10:29-16:50

2 stops22h 21m

£703

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 6/5

09:20-15:55

1 stop14h 35m

San Francisco

Wed 13/5

17:40-19:30

1 stop17h 50m

£704

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 2/9

09:20-15:55

1 stop14h 35m

San Francisco

Sun 6/9

16:35-20:55

2 stops20h 20m

£796

Fastest return journey

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 8/6

09:20-15:50

1 stop14h 30m

San Francisco

Thu 3/9

17:35-16:50

1 stop15h 15m

£823

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Thu 2/7

09:05-22:35

2 stops21h 30m

San Francisco

Wed 15/7

14:19-17:35

2 stops19h 16m

£843

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 8/6

09:20-15:50

1 stop14h 30m

San Francisco

Fri 4/9

17:35-16:50

1 stop15h 15m

£852

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 1/7

09:20-15:55

1 stop14h 35m

San Francisco

Wed 15/7

17:40-19:30

1 stop17h 50m

£867

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Fri 29/5

06:45-17:40

2 stops18h 55m

San Francisco

Sun 7/6

17:40-16:50

1 stop15h 10m

£897

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Sun 19/7

20:45-13:50

2 stops25h 05m

San Francisco

Fri 7/8

17:35-16:50

1 stop15h 15m

£900

Cheapest one-way

Fastest single journey

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 30/9

09:20-15:55

1 stop14h 35m

£450

Flights are sorted by cheapest return flights first.

Deals found on 15/4

Showing 1-10 of 19 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 Monday (37 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (31 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. 18 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 14h 35m. 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 (87%), Austrian Airlines (87%), United Airlines (87%).
What are the cheapest flights from Portsmouth to San Francisco?
Looking at all options, your cheapest flight can be booked for £396. While the most popular route (Southampton Eastleigh - San Francisco) can be booked for £684 on average, our data indicates £1,176 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£318	Average£586	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Air Canada	Cheapest£333	Average£411	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
British Airways	Cheapest£341	Average£506	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
SWISS	Cheapest£349	Average£447	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Aer Lingus	Cheapest£350	Average£555	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Scandinavian Airlines	Cheapest£354	Average£499	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£357	Average£464	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Finnair	Cheapest£361	Average£480	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Brussels Airlines	Cheapest£369	Average£505	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
United Airlines	Cheapest£370	Average£508	FlexibilityNo cancel fee	On-time69%	Search United Airlines 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?

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Cheap flights from Portsmouth to San Francisco from £410

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 12/10. 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 20 April 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 20 April 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 20 April 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 20 April 2026.

Last-minute flights from Portsmouth to San FranciscoDiscover last-minute flight deals from Portsmouth to San Francisco. Data last updated 20 April 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to San Francisco. Data last updated 20 April 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 20 April 2026.

Search for one-way flight options from Portsmouth to San Francisco. Find affordable one-way fares based on user searches. Data last updated 20 April 2026.

Find flight deals from Portsmouth to San Francisco

Keep the following information in mind while searching for Portsmouth to San Francisco flight deals. Data was last updated 20 April 2026.

Round-trip from

One-way from

Popular in

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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.

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

Everything you need to know about your flight from Portsmouth to San Francisco

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 20 April 2026.

Weekly flight availability from Portsmouth to San Francisco

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?

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?

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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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Search flights from Portsmouth to San Francisco by cabin class

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Portsmouth and San Francisco flights

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Popular flight searches

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Other flights to San Francisco

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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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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 20 April 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 20 April 2026.

Last-minute flights from Portsmouth to San Francisco
Discover last-minute flight deals from Portsmouth to San Francisco. Data last updated 20 April 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 20 April 2026.