which name fight is cheap for south korea from Tianjin than ferry?

Actually, the flight from Tianjin to South Korea (Incheon) belongs to international flight, so the price is a little expensive. The fare varies from about CNY 1700 to CNY 2460 or more, unless there is a discount. Thus it is more expensive than the ferry ticket.

how long bus for tianjin from bejing ? what tabletime on sunday?how cost? how we getting to tianjin port after arriving tianjin from bejing by a long distance bus? pls rpey me thanks

In my opinion, the best and fast way from Beijing to Tianjin is taking the bullet trains from Beijing South Railway Station to Tianjin. After that you can take the light train from Shiyijinglu Station to Civil Square Station. Then take a taxi and you will reach the port easily.
The train will take you about 30 minutes from Beijing to Tianjin and the ticket price is 55 RMB for the second class seat and 66 RMB for the first class seat. The light train from Shiyijinglu Station to the Civil Square Station will take you 9 RMB and about 40 minutes.