Cheap flights from San Francisco to Costa Rica from $197

The cheapest month to fly to Costa Rica from San Francisco is in May. Flight prices, which tend to average around $506, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in May, then September is your next best option. Flight prices from San Francisco to Costa Rica during September average around $526.

According to our data, Wednesday is the cheapest day to fly to Costa Rica from San Francisco. The lowest ticket price found for a Wednesday departure recently was $719. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $864. These prices are subject to change though, so be sure to set up a Price Alert for flights to Costa Rica.

Fly from San Francisco to Liberia for the best San Francisco - Costa Rica flight prices

You are more likely to see cheaper flights to Costa Rica from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Costa Rica for around $634 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Costa Rica from San Francisco for as low as $540 on momondo.

JetBlue, Alaska Airlines, and Southwest are the most popular carriers operating from San Francisco to Costa Rica

United Airlines, Avianca and Alaska Airlines are the top three most popular airlines that fly to Costa Rica from San Francisco according to our data. United Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Costa Rica. Keep in mind that there are 9 different airlines that fly to Costa Rica on a routine basis, so you have a few additional options to choose from.

Historically, on average around 15% of flights between San Francisco and Costa Rica have experienced a delay on any given week. The average delay length over the past 12 months has been 97 minutes.

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

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

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 14% of their flights experiencing any sort of delay.

1 flights are operational daily from San Francisco to Costa Rica as of March 2026. The most popular departure time for this route is 12:00AM, with 78% of flights per day taking off in the morning.

The number of flights available between San Francisco and Costa Rica is 9 per week as of March 2026. The most frequent departure day is Sat, with 22% of weekly flights leaving on this day.