Cheap flights from California to Portugal from $289

The cheapest month to fly to Portugal from California is in February. Flight prices, which tend to average around $609, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Portugal from California during January instead. Flights to Portugal in January, while not as cheap as those in February, still average around $614.

According to our data, Thursday is the cheapest day to fly to Portugal from California. The lowest ticket price found for a Thursday departure recently was $575. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Sunday, with ticket prices averaging around $858.

Our most recent data shows that the best time of day to fly to Portugal is in the afternoon. Flights from California to Portugal during this time can be as low as $728. In the evening is when there is more demand to fly to Portugal, so prices are often more expensive at around $943 per ticket.

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

You are more likely to see cheaper flights to Portugal from California when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $834 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from California for as low as $777 on momondo.

There are 4 cabin classes available to choose from on California to Portugal flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

British Airways, United Airlines, and Delta are the most popular carriers operating from California to Portugal

TAP AIR PORTUGAL, United Airlines and British Airways are the top three most popular airlines that fly to Portugal from California according to our data. TAP AIR PORTUGAL is the first choice among our users, with 48% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 17 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

As of August 2026, there are 6 flights per week flying from California to Portugal. The most common day of the week flights depart is Sat, with 67% of flights taking off on this day.

Average flight duration from California to Portugal depends on which airport you fly into and out of. Flying from Los Angeles to Lisbon is 11h on average, while flying from San Francisco to Lisbon is 11h 05m on average. Lisbon is the most popular airport in Portugal.