Cheap flights from San Francisco to Seoul from $366

The month of August is another great option to travel to Seoul, with average flight prices from San Francisco averaging around $662.

According to our data, Monday is the cheapest day to fly to Seoul from San Francisco. The lowest ticket price found for a Monday departure recently was $766. 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 Seoul is Saturday, with ticket prices averaging around $861.

Flying to Seoul from San Francisco in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $711 when looking at flights departing in the afternoon. In the morning is when there is more demand to fly to Seoul, so prices are often more expensive at around $839 per ticket.

Fly from San Francisco to Incheon Intl for the best San Francisco - Seoul flight prices

You are more likely to see cheaper flights to Seoul from San Francisco when booking week ahead of your departure date. In general, you can expect to find flights to Seoul for around $842 when searching week out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seoul from San Francisco for as low as $728 on momondo.

There are 4 cabin classes available to choose from on San Francisco to Seoul 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 2% on your flight if you consider stops on a San Francisco to Seoul flight.

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

EVA Air, China Eastern, and United Airlines are the most popular carriers operating from San Francisco to Seoul

United Airlines, AIR PREMIA and Asiana Airlines are the top three most popular airlines that fly to Seoul from San Francisco according to our data. United Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Seoul. Keep in mind that there are 11 different airlines that fly to Seoul on a routine basis, so you have a few additional options to choose from.

Honolulu (HNL) was the most common stop: 18% of momondo users choosing 1-stop flights on this route connected there.

Flights via Seattle (SEA) offer the lowest average round-trip price of $736.

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 16h 14m.

Seattle (SEA) has the shortest average layover time for this route: 2h 15m.

The number of flights available between San Francisco and Seoul is 9 per day as of March 2026. The most frequent departure time is 11:00PM, with 56% of daily flights leaving in the evening.

As of March 2026, 63 flights take off from San Francisco and land in Seoul each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.