Cheap flights from San Francisco to Seoul from $366

The cheapest month to fly to Incheon Intl Airport from San Francisco is in February. Flight prices, which tend to average around $682, are often lower during this time because this is during the off-season. If you are unable to visit Incheon Intl Airport during the month of February, then departing from San Francisco during the month January is also very affordable. Most momondo users find prices during this month for around $703.

The cheapest day to depart from San Francisco to Incheon Intl Airport is on a Sunday when prices can be found for as low as $766. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $860. These prices are subject to change though, so be sure to set up a Price Alert for flights to Incheon Intl Airport.

In the afternoon is the cheapest time of day to fly from San Francisco to Incheon Intl Airport when you can find flight prices for as low as $709. Flying to Incheon Intl Airport in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $838 on average. Flights to Incheon Intl Airport from San Francisco in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

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

There are 4 cabin classes available to choose from on San Francisco to Incheon Intl 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 Incheon Intl Airport flight.

As of March 2026, prices for San Francisco to Incheon Intl Airport flights are approximately 1% more expensive when compared to flights at the same time last year.

China Eastern and Alaska Airlines are the most popular carriers operating from San Francisco to Incheon Intl

United Airlines, AIR PREMIA and Asiana Airlines are the top three most popular airlines that fly to Incheon Intl Airport 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 Incheon Intl Airport. Keep in mind that there are 11 different airlines that fly to Incheon Intl Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 21% of flights between San Francisco and Incheon have experienced a delay on any given week. The average delay length over the past 12 months has been 238 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

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

According to our data, AIR PREMIA 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.

Hong Kong (HKG) was the most common stop: 22% 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.

Vancouver (YVR) has the shortest average layover time for this route: 2h 54m.

As of March 2026, there are 9 flights per day flying from San Francisco to Incheon Intl Airport. The most common time of day flights depart is 11:00PM, with 56% of flights taking off in the evening.

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