There are one airlines offering flights to Beijing. The most direct route isn’t necessarily the cheapest – being flexible is key to finding the lowest airfare rates. For example, try searching by month to see the best time of the week to fly. The cheapest date is currently 03 / Feb / 2019.
Make sure you use the search options above to search for flights to other airports in Beijing, not just Beijing Capital Int. Airport. The more options you look at, the better your chance of finding a cheap deal. Just so you know, the flight typically takes 22 hrs 5 mins.
There are about one flights via Beijing every week, so you have plenty of options.
If you're planning on going to Beijing during this time, you could take a look at other airport options. Or you could try to get a last-minute bargain.