Cheap flights from San Diego to Lisbon from $342

In general, February is the cheapest month to fly from San Diego to Lisbon. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $598. If you are unable to visit Lisbon during the month of February, then departing from San Diego during the month January is also very affordable. Most momondo users find prices during this month for around $604.

You are more likely to see cheaper flights to Lisbon from San Diego when booking weeks ahead of your departure date. In general, you can expect to find flights to Lisbon for around $750 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Lisbon from San Diego for as low as $649 on momondo.

You could potentially save up to 16% on your flight if you consider stops on a San Diego to Lisbon flight.

As of May 2026, prices for San Diego to Lisbon flights are approximately 33% cheaper when compared to flights at the same time last year.

KLM, United Airlines, and Lufthansa are the most popular carriers operating from San Diego to Lisbon Humberto Delgado

British Airways, United Airlines and Delta are the top three most popular airlines that fly to Lisbon from San Diego according to our data. British Airways is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Lisbon. Keep in mind that there are 8 different airlines that fly to Lisbon on a routine basis, so you have a few additional options to choose from.

London (LHR) was the most common stop: 41% of momondo users choosing 1-stop flights on this route connected there.

Flights via Newark (EWR) offer the lowest average round-trip price of $563.

Flights connecting via Washington, D.C. (IAD) have the shortest average one-way travel time: 13h 35m.

Washington, D.C. (IAD) has the shortest average layover time for this route: 2h 01m.