Cheap flights from Seoul to San Francisco from $401

If you aren’t able to travel to San Francisco during the month of April, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $289.

The cheapest day to depart from Seoul to San Francisco is on a Wednesday when prices can be found for as low as $653. The most expensive day to fly to San Francisco is Friday, with ticket prices averaging around $786.

Our data shows that the cheapest Seoul to San Francisco flights are usually those with departure times at noon. Our users have found flights to San Francisco at noon for as low as $492. Flights in the morning are often more expensive with an average ticket price of $770.

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

You are more likely to see cheaper flights to San Francisco from Seoul when booking weeks ahead of your departure date. In general, you can expect to find flights to San Francisco for around $624 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Francisco from Seoul for as low as $456 on momondo.

There are 3 cabin classes available to choose from on Seoul to San Francisco 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 19% on your flight if you consider stops on a Seoul to San Francisco flight.

As of April 2026, prices for Seoul to San Francisco flights are approximately 25% cheaper when compared to flights at the same time last year.

United Airlines and Alaska Airlines are the most popular carriers operating from Seoul to San Francisco

Asiana Airlines, United Airlines and AIR PREMIA are the top three most popular airlines that fly to San Francisco from Seoul according to our data. Asiana Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to San Francisco. Keep in mind that there are 5 different airlines that fly to San Francisco on a routine basis, so you have a few additional options to choose from.

Seattle (SEA) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Flights via Vancouver (YVR) offer the lowest average round-trip price of $455.

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 13h 40m.

Vancouver (YVR) has the shortest average layover time for this route: 1h 33m.

As of April 2026, there are 8 flights per day flying from Seoul to San Francisco. The most common time of day flights depart is 4:00PM, with 42% of flights taking off in the evening.

The number of flights available between Seoul and San Francisco is 61 per week as of April 2026. The most frequent departure day is Mon, with 18% of weekly flights leaving on this day.