Cheap flights from San Francisco to Helsinki from $387

The month of February is, on average, the cheapest month to fly to Helsinki from San Francisco, with most prices found around $548. If you aren’t able to travel during the month of February, then book flights to Helsinki from San Francisco during April instead. Flights to Helsinki in April, while not as cheap as those in February, still average around $660.

You are more likely to see cheaper flights to Helsinki from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Helsinki for around $933 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Helsinki from San Francisco for as low as $851 on momondo.

You could potentially save up to 4% on your flight if you consider stops on a San Francisco to Helsinki flight.

As of September 2026, prices for San Francisco to Helsinki flights are approximately 46% cheaper when compared to flights at the same time last year.

British Airways, Delta, and United Airlines are the most popular carriers operating from San Francisco to Helsinki-Vantaa

Scandinavian Airlines, Finnair and Lufthansa are the top three most popular airlines that fly to Helsinki from San Francisco according to our data. Scandinavian Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Helsinki. Keep in mind that there are 8 different airlines that fly to Helsinki on a routine basis, so you have a few additional options to choose from.

Istanbul (IST) was the most common stop: 26% of momondo users choosing 1-stop flights on this route connected there.

Flights via Istanbul (IST) offer the lowest average round-trip price of $897.

Flights connecting via Seattle (SEA) have the shortest average one-way travel time: 12h 50m.

Seattle (SEA) has the shortest average layover time for this route: 1h 27m.