From FengHuangCheng to Tongren, fly to Guangzhou or Shenzhen

We are staying in FH for 1 night. When we check out, can we hire a taxi to go from FH to TR to catch a flight to Guangzhou? How much is the taxi fare (approximately)? Also, does TR airport offer reliable service? We want to book a flight, but we want to make sure that the flight is guaranteed to leave the day we choose, and not cancel. Is this ok?