Cheap flights from Seoul to Southeast Asia from $73

The month of September is, on average, the cheapest month to fly to Southeast Asia from Seoul, with most prices found around $219. If you don’t want to visit Southeast Asia in September, then you should wait until March to fly from Seoul, when ticket prices are also cheap, with an average price of $246.

The cheapest day to depart from Seoul to Southeast Asia is on a Thursday when prices can be found for as low as $343. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $430. These prices are subject to change though, so be sure to set up a Price Alert for flights to Southeast Asia.

At noon is the cheapest time of day to fly from Seoul to Southeast Asia when you can find flight prices for as low as $302. Flying to Southeast Asia at noon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around $376. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Incheon Intl to Bangkok Suvarnabhumi for the best Seoul - Southeast Asia flight prices

You are more likely to see cheaper flights to Southeast Asia from Seoul when booking weeks ahead of your departure date. In general, you can expect to find flights to Southeast Asia for around $267 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Southeast Asia from Seoul for as low as $211 on momondo.

There are 3 cabin classes available to choose from on Seoul to Southeast Asia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Jeju Air, Sun PhuQuoc Airways, and Air Busan are the most popular carriers operating from Seoul to Southeast Asia

Asiana Airlines, Cebu Pacific and Korean Air are the top three most popular airlines that fly to Southeast Asia from Seoul according to our data. Asiana Airlines is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Southeast Asia. Keep in mind that there are 26 different airlines that fly to Southeast Asia on a routine basis, so you have a few additional options to choose from.

The number of flights available between Seoul and Southeast Asia is 163 per day as of September 2026. The most frequent departure time is 6:00PM, with 53% of daily flights leaving in the evening.

As of September 2026, 1,146 flights take off from Seoul and land in Southeast Asia each week. The most common flight departure day for this route is Thu, with 15% of weekly flights taking off on this day.