China Southern is offering return fares to Beijing for $465 return. This is the cheapest ever flight to Beijing by $37. Fares include bags, meals and seats. Dates varied between August and November.
Find the cheap dates on Google Flights, then plug them into Momondo.
Shanghai is more of a international city, feels just like another big metropolis. If you want to experience a piece of Chinese culture, Beijing is definitely more worthwhile, beware it might be a bit too much if you stray afar
Beijing is great for smog, it's a very popular export product too, especially during winter! https://en.wikipedia.org/wiki/File:2016_Air_pollution_in_Bei…
Is beijing worth going? Good price but found a 2 days in shanghai more than enough, is beijing a more exciting trip?