Cheap flights from the United States to South Korea from $444

If you aren’t able to travel to South Korea during the month of April, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $946.

On average, the least expensive day to fly to South Korea from United States is on a Sunday. momondo users have found tickets for Sunday departures for as low as $733. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from United States to South Korea for around $911.

Flying to South Korea from United States in the evening is the least expensive time of day to depart. momondo users have found prices as low as $771 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $997 on average. Flights to South Korea from United States at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Seattle/Tacoma Intl to Incheon Intl for the best United States - South Korea flight prices

You are more likely to see cheaper flights to South Korea from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to South Korea for around $1,532 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to South Korea from United States for as low as $1,340 on momondo.

There are 4 cabin classes available to choose from on United States to South Korea flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

United Airlines, Delta, and Cathay Pacific are the most popular carriers operating from United States to South Korea

AIR PREMIA, Korean Air and Asiana Airlines are the top three most popular airlines that fly to South Korea from United States according to our data. AIR PREMIA is the first choice among our users, with 49% of people opting to fly with this airline when traveling to South Korea. Keep in mind that there are 24 different airlines that fly to South Korea on a routine basis, so you have a few additional options to choose from.

Historically, on average around 23% of flights between United States and South Korea have experienced a delay on any given week. The average delay length over the past 12 months has been 165 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights in the evening 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. Sunday 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 13% of their flights experiencing any sort of delay.

As of May 2026, there are 54 flights per day flying from United States to South Korea. The most common time of day flights depart is 11:00PM, with 55% of flights taking off in the evening.

As of May 2026, there are 382 flights per week flying from United States to South Korea. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.