How long is the flight from Portsmouth to San Francisco?

Departing from Portsmouth to San Francisco will take you 25h 45m. The distance from Portsmouth to San Francisco is about 5349 mi.

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 £407. While the most popular route (Southampton Eastleigh - San Francisco) can be booked for £479 on average, our data indicates £1,820 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: KLM (86%), Air France (86%), Delta (86%).

What are the most popular airlines that fly from Portsmouth to San Francisco?

The most popular airlines flying from Portsmouth to San Francisco are American Airlines, Air Canada and Air France. Something to consider prior to booking your flight.

How far in advance should I book a flight from Portsmouth to San Francisco?

To save on the cost of your flight from Portsmouth to San Francisco, book at least 46 days before your planned departure. Booking around this time can save you about 19% on the cost of this flight compared to booking a flight leaving this week. We have found prices from £440 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as £539.

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

February is one of the best times of the year to fly to San Francisco from Portsmouth. Prices for February average £489 per person but you can even find prices for as low as £333. The most expensive prices can be found in the month of July. Opting for a February flight can save you 31% on your journey compared to booking in July

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. 17 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.

£478+ Flights from Portsmouth to San Francisco

Cheap flight deals from Portsmouth to San Francisco

Round-trip from	£478
Popular in	July
Cheapest in	February
Average price	£423

KLM
30/10-6/11
2 total stops
44h 50m total
Portsmouth to San Francisco

Search Deals

Highest demand for flights based on searches. 15% potential increase in price (£63 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 September 2025

Search Deals

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 16 September 2025.

Thu 30/1018:05SOU - SFO

1 stop25h 45mKLM

Thu 6/1113:55SFO - SOU

1 stop19h 05mKLM

Deal found 15/9£478

Wed 29/1008:40SOU - SFO

1 stop35h 10mKLM

Wed 5/1107:05SFO - SOU

2 stops17h 15mKLM

Deal found 14/9£479

Thu 30/1008:50SOU - SFO

2 stops20h 45mDelta

Wed 5/1100:35SFO - SOU

2 stops23h 30mDelta

Deal found 15/9£483

Wed 29/1017:30SOU - SFO

2 stops36h 05mVirgin Atlantic

Wed 5/1115:40SFO - SOU

2 stops32h 25mVirgin Atlantic

Deal found 14/9£484

Wed 29/1017:30SOU - SFO

1 stop26h 20mDelta

Tue 4/1100:35SFO - SOU

2 stops23h 45mDelta

Deal found 14/9£501

Mon 6/1017:35SOU - SFO

1 stop26h 10mDelta

Tue 3/313:55SFO - SOU

1 stop19h 05mDelta

Deal found 13/9£509

Sun 5/1018:25SOU - SFO

2 stops29h 40mDelta

Thu 5/313:55SFO - SOU

1 stop19h 05mDelta

Deal found 13/9£513

Thu 25/920:00SOU - SFO

1 stop27h 50mBritish Airways

Fri 10/1017:40SFO - SOU

1 stop14h 05mBritish Airways

Deal found 14/9£588

Thu 25/920:00SOU - SFO

1 stop27h 50mBritish Airways

Sun 5/1017:40SFO - SOU

1 stop30h 35mBritish Airways

Deal found 14/9£595

Fri 26/909:40SOU - SFO

1 stop14h 10mBritish Airways

Tue 7/1017:40SFO - SOU

1 stop17h 50mBritish Airways

Deal found 14/9£602

Fri 26/909:40SOU - SFO

1 stop14h 10mBritish Airways

Sun 5/1017:40SFO - SOU

1 stop30h 35mBritish Airways

Deal found 14/9£610

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 16 September 2025.

Thu 30/1018:05SOU - SFO

1 stop25h 45mKLM

Thu 6/1113:55SFO - SOU

1 stop19h 05mKLM

Deal found 15/9£478

Thu 30/1018:05SOU - SFO

1 stop25h 45mDelta

Wed 5/1100:35SFO - SOU

2 stops23h 30mDelta

Deal found 15/9£479

Wed 29/1017:30SOU - SFO

2 stops36h 05mVirgin Atlantic

Wed 5/1115:40SFO - SOU

2 stops32h 25mVirgin Atlantic

Deal found 14/9£484

Wed 29/1008:40SOU - SFO

1 stop35h 10mKLM

Wed 5/1107:05SFO - SOU

2 stops17h 15mKLM

Deal found 14/9£479

Wed 29/1017:30SOU - SFO

1 stop26h 20mDelta

Tue 4/1100:35SFO - SOU

2 stops23h 45mDelta

Deal found 14/9£501

Mon 6/1017:35SOU - SFO

1 stop26h 10mDelta

Thu 5/313:55SFO - SOU

1 stop19h 05mDelta

Deal found 13/9£509

Mon 6/1017:35SOU - SFO

1 stop26h 10mDelta

Mon 2/313:55SFO - SOU

1 stop34h 15mDelta

Deal found 13/9£509

Mon 6/1017:35SOU - SFO

1 stop26h 10mDelta

Wed 4/314:00SFO - SOU

2 stops19h 25mDelta

Deal found 13/9£509

Last-minute flights from Portsmouth to San Francisco
Discover last-minute flight deals from Portsmouth to San Francisco. Data last updated 16 September 2025 and is based on user searches.

Thu 25/920:00SOU - SFO

1 stop27h 50mBritish Airways

Fri 10/1017:40SFO - SOU

1 stop14h 05mBritish Airways

Deal found 14/9£588

Thu 25/920:00SOU - SFO

1 stop27h 50mBritish Airways

Sun 5/1017:40SFO - SOU

1 stop30h 35mBritish Airways

Deal found 14/9£595

Fri 26/909:40SOU - SFO

1 stop14h 10mBritish Airways

Tue 7/1017:40SFO - SOU

1 stop17h 50mBritish Airways

Deal found 14/9£602

Fri 26/909:40SOU - SFO

1 stop14h 10mBritish Airways

Sun 5/1017:40SFO - SOU

1 stop30h 35mBritish Airways

Deal found 14/9£610

Sun 5/1018:25SOU - SFO

2 stops29h 40mDelta

Thu 5/313:55SFO - SOU

1 stop19h 05mDelta

Deal found 13/9£513

Mon 6/1017:35SOU - SFO

1 stop26h 10mDelta

Mon 2/313:55SFO - SOU

1 stop34h 15mDelta

Deal found 13/9£509

Wed 29/1008:40SOU - SFO

1 stop35h 10mKLM

Wed 5/1107:05SFO - SOU

2 stops17h 15mKLM

Deal found 14/9£479

Wed 29/1017:30SOU - SFO

2 stops36h 05mVirgin Atlantic

Wed 5/1115:40SFO - SOU

2 stops32h 25mVirgin Atlantic

Deal found 14/9£484

Wed 29/1017:30SOU - SFO

1 stop26h 20mDelta

Tue 4/1100:35SFO - SOU

2 stops23h 45mDelta

Deal found 14/9£501

Thu 30/1018:05SOU - SFO

1 stop25h 45mKLM

Thu 6/1113:55SFO - SOU

1 stop19h 05mKLM

Deal found 15/9£478

Thu 30/1008:50SOU - SFO

2 stops20h 45mDelta

Wed 5/1100:35SFO - SOU

2 stops23h 30mDelta

Deal found 15/9£483

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 16 September 2025.

Mon 29/1209:30SOU - SFO

1 stop14h 05mBritish Airways

Deal found 14/9£531

Mon 5/109:30SOU - SFO

1 stop14h 05mBritish Airways

Deal found 13/9£541

Sun 4/116:05SOU - SFO

1 stop31h 30mBritish Airways

Deal found 13/9£547

Sun 30/1118:25SOU - SFO

3 stops28h 35mBritish Airways

Deal found 15/9£561

Wed 7/106:50SOU - SFO

2 stops19h 55mBritish Airways

Deal found 13/9£564

Thu 8/116:05SOU - SFO

1 stop31h 30mBritish Airways

Deal found 13/9£589

Tue 14/1009:10SOU - SFO

1 stop14h 45mBritish Airways

Deal found 12/9£591

Mon 13/1020:00SOU - SFO

1 stop27h 55mBritish Airways

Deal found 12/9£599

Sun 12/1016:00SOU - SFO

2 stops53h 50mBritish Airways

Deal found 12/9£612

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

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Thu 30/10

18:05-12:50

1 stop25h 45m

San Francisco

Thu 6/11

13:55-17:00

1 stop19h 05m

£478

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Thu 30/10

18:05-12:50

1 stop25h 45m

San Francisco

Wed 5/11

00:35-08:05

2 stops23h 30m

£479

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 29/10

08:40-12:50

1 stop35h 10m

San Francisco

Wed 5/11

07:05-08:20

2 stops17h 15m

£479

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 29/10

17:30-22:35

2 stops36h 05m

San Francisco

Wed 5/11

15:40-08:05

2 stops32h 25m

£484

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Wed 29/10

17:30-12:50

1 stop26h 20m

San Francisco

Tue 4/11

00:35-08:20

2 stops23h 45m

£501

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 6/10

17:35-11:45

1 stop26h 10m

San Francisco

Thu 5/3

13:55-17:00

1 stop19h 05m

£509

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 6/10

17:35-11:45

1 stop26h 10m

San Francisco

Mon 2/3

13:55-08:10

1 stop34h 15m

£509

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 6/10

17:35-11:45

1 stop26h 10m

San Francisco

Wed 4/3

14:00-17:25

2 stops19h 25m

£509

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 29/12

09:30-15:35

1 stop14h 05m

£531

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Sun 30/11

18:25-15:00

3 stops28h 35m

£561

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 19 results

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.

Cheapflights Insights

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

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?

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?

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

The most flights from P0R to SFO are scheduled on a Monday (42 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (42 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 11.8 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. 17 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 25h 45m. The distance from Portsmouth to San Francisco is about 5349 mi.
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: KLM (86%), Air France (86%), Delta (86%).
What are the cheapest flights from Portsmouth to San Francisco?
Looking at all options, your cheapest flight can be booked for £407. While the most popular route (Southampton Eastleigh - San Francisco) can be booked for £479 on average, our data indicates £1,820 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

Santa Cruz

Newark

South San Francisco

Bodega Bay

Pacific Grove

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Top 10 airlines flying from Portsmouth to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£235	Average£485	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
TAP AIR PORTUGAL	Cheapest£346	Average£462	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
SWISS	Cheapest£348	Average£434	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Aer Lingus	Cheapest£349	Average£554	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Scandinavian Airlines	Cheapest£351	Average£542	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Brussels Airlines	Cheapest£354	Average£472	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Air Canada	Cheapest£356	Average£485	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Virgin Atlantic	Cheapest£360	Average£479	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
United Airlines	Cheapest£363	Average£542	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
British Airways	Cheapest£363	Average£487	FlexibilityNo cancel fee	On-time70%	Search British Airways flights

Fly with Cheapflights

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 £478

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/10. 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

Keep the following information in mind while searching for Portsmouth to San Francisco flight deals. Data was last updated 16 September 2025.

Round-trip from

Popular in

Cheapest in

Average price

Find 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 16 September 2025.

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 16 September 2025.

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 month to book a 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 16 September 2025.

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 16 December 2024.

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?

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

Travelling to a place near San Francisco?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

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 San Francisco?

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

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 16 September 2025.