I live in HKG
and China, and I'm flying all around mainland at least twice a week. You can rest assured with giants such as China Southern, Air China, China Eastern and recently Hainan Airlines, I'm using these all the time and service is completely OK
, on pair to many European airlines.
(tip: in CA and HU, you'll get "China Daily" newspaper in English, since you're foreigner
On way back to HKG
, you can choose Cathay's subsidiary Dragon Air, since CX
don't serve from Tianjin, but I'm sure you'll love KA
, it's wonderful airline with excellent service.
Although, if you want to pay at least 2x less, you can choose to fly with domestic airlines from Tianjin to Guangzhou or Shenzhen, and then take high-speed train to Hong Kong, this would save you money and also spice-up your journey
If you need any help in HKG
or China for booking domestic tickets, or any other help, just let me know.
(I'm always using www.ctrip.com,
great deals for flights and hotels in China)