If you're looking to fly from Beijing Capital Int. At the moment, there are 11 airlines flying to Seoul. Go through the results to find the right flights for you – you can adjust the filters to see find even more flights to Seoul.
Air China is the most popular airline that flies from Beijing Capital Int. Airport to Seoul. But it's still worth looking at other options, as there are 42 flights to Seoul every week. If you want to broaden your search, look at flights departing from other airports.
Your flight from to Seoul will take at least 2 hrs. On average, it takes 10 hrs 30 mins to fly the 903 km distance. Take a look at flight times to see which one works best for you.
You can also search by month, which will reveal the cheapest time of the week to fly.