Cheap flights from Seoul to the United States from $321

In general, November is the cheapest month to fly from Seoul to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $504. If you aren’t able to travel during the month of November, then book flights to United States from Seoul during March instead. Flights to United States in March, while not as cheap as those in November, still average around $599.

According to our data, Wednesday is the cheapest day to fly to United States from Seoul. The lowest ticket price found for a Wednesday departure recently was $739. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $812. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

The cheapest time of day to fly to United States is in the afternoon when flights can be purchased for as low as $535. Try not to purchase tickets in the morning because they tend to be around $830. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

You are more likely to see cheaper flights to United States from Seoul when booking weeks ahead of your departure date. In general, you can expect to find flights to United States for around $873 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from Seoul for as low as $748 on momondo.

AIR PREMIA, United Airlines, and Alaska Airlines are the most popular carriers operating from Seoul to United States

AIR PREMIA, Asiana Airlines and Korean Air are the top three most popular airlines that fly to United States from Seoul according to our data. AIR PREMIA is the first choice among our users, with 41% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 9 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

Historically, on average around 0% of flights between Seoul and United States have experienced a delay on any given week. The average delay length over the past 12 months has been 0 minutes.

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

56 flights are operational daily from Seoul to United States as of May 2026. The most popular departure time for this route is 9:00PM, with 42% of flights per day taking off in the evening.

As of May 2026, 395 flights take off from Seoul and land in United States each week. The most common flight departure day for this route is Wed, with 15% of weekly flights taking off on this day.