Find a great deal and save up to 41% by booking at least 61 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Portsmouth to San Francisco within the next two weeks, with the cheapest ticket starting at £382.
Flights from Portsmouth to San Francisco lean towards being more expensive in July. Prices are generally better when you fly from Portsmouth to San Francisco in February, with the cheapest ticket starting at £254.
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.
At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Southampton and San Francisco for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.
The rainfall in Southampton is generally same as the rainfall in San Francisco. This will continue over the next 10 days.
Expect the weather to be around 25 °C on average in September. As the temperature peaks, try to get your plans done early, as flight price and availability will have an impact on your travels. The climate in San Francisco is generally hotter than in Southampton.