Cheap flights from Lisbon to San Francisco from $412

If you aren’t able to travel to San Francisco during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $810.

The cheapest day to depart from Lisbon to San Francisco is on a Friday when prices can be found for as low as $813. The most expensive day to fly to San Francisco is Monday, with ticket prices averaging around $1,697.

Our data shows that the cheapest Lisbon to San Francisco flights are usually those with departure times in the morning. Our users have found flights to San Francisco in the morning for as low as $871. Flights at noon are often more expensive with an average ticket price of $957.

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 $870 when searching weeks out. 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 $695 on momondo.

There are 3 cabin classes available to choose from on Lisbon 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 21% on your flight if you consider stops on a Lisbon to San Francisco flight.

As of June 2026, prices for Lisbon to San Francisco flights are approximately 9% cheaper when compared to flights at the same time last year.

Aer Lingus and British Airways are the most popular carriers operating from Lisbon Humberto Delgado to San Francisco

TAP AIR PORTUGAL, United Airlines and Delta are the top three most popular airlines that fly to San Francisco from Lisbon according to our data. TAP AIR PORTUGAL is the first choice among our users, with 50% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 7 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

Historically, on average around 18% 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 110 minutes.

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

Monday is statistically the day of the week which experiences the fewest number of delays on this flight route. Tuesday has historically seen more delays on average compared to the rest of the week.

According to our data, TAP AIR PORTUGAL have had the least number of delays on this route over the last 12 months; with about 18% of their flights experiencing any sort of delay.

Paris (CDG) was the most common stop: 42% of momondo users choosing 1-stop flights on this route connected there.

Flights via New York (JFK) offer the lowest average round-trip price of $596.

Flights connecting via Zurich (ZRH) have the shortest average one-way travel time: 18h 15m.

Frankfurt am Main (FRA) has the shortest average layover time for this route: 3h 38m.