Taxi from Tianjin Port to Tianhuan Long Distance Bus Station.

I plan to take a taxi from New Cruise Port to Tianhuan Long Distance Bus Station (at corner of Hongqi Lu and Anshan Xidao), to board a coach for Beijing Airport. My plane leaves at 5:30 pm. Is this a reliable way to reach the airport? Approximately how much will the taxi fare be from there to Tianhuan and how long a taxi ride?