Question : Looking for the cheapest flight over the next 30 days?
Answer : Since low prices are preferred, look at Mar 12th. As of Feb 20th, it's showing the cheapest ticket sales at $368. That is 8% below the average price for this route, so you can spend that extra money on an adventure rather than the flight.
Question : What price range should you expect when booking from Beijing (PEK) to Kota Kinabalu (BKI)?
Answer : Ranging from $368 to $433, prices for PEK to BKI fluctuate much less than most routes from China. Prices tend to be lower the further out you book.
Question : How long do most people stay in Kota Kinabalu?
Answer : Of course you're not most people, but if you were, you'd stay roughly one week.
Question : Would you be willing to change your travel days if it saved you money?
Answer : The lowest-cost day to fly in March is Sunday. Being flexible with your travel days garners even more savings during booking.