Cheap flights from Lisbon to San Francisco from £381

The month of February is, on average, the cheapest month to fly to San Francisco from Lisbon, with most prices found around £566. If you are unable to visit San Francisco during the month of February, then departing from Lisbon during the month November is also very affordable. Most momondo users find prices during this month for around £595.

Fly from Lisbon Humberto Delgado to San Francisco for the best Lisbon Humberto Delgado - San Francisco flight prices

You are more likely to see cheaper flights to San Francisco from Lisbon when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around £624 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Lisbon for as low as £539 on momondo.

There are 2 cabin classes available to choose from on Lisbon Humberto Delgado to San Francisco flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 48% on your flight if you consider stops on a Lisbon to San Francisco flight.

As of April 2026, prices for Lisbon to San Francisco flights are approximately 12% more expensive when compared to flights at the same time last year.

Historically, on average around 13% of flights between Lisbon and San Francisco have experienced a delay on any given week. The average delay length over the past 12 months has been 119 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Thursday is statistically the day of the week that experiences the fewest delays on this flight route. Wednesday has historically seen more delays on average compared to the rest of the week.

According to our data, TAP AIR PORTUGAL have had the fewest delays on this route over the last 12 months, with about 13% of their flights experiencing any sort of delay.

Philadelphia (PHL) was the most common stop: 67% of momondo users choosing one-stop flights on this route connected there.

Flights via Philadelphia (PHL) offer the lowest average return price of £607.

Flights connecting via Paris (CDG) have the shortest average one-way travel time: 15h 55m.

Paris (CDG) has the shortest average stopover time for this route: 1h 40m.