Complex sentence: Finnair is operating the A350 at very high rate: 15 flight hours per day for Beijing, 18 hours for Shanghai, more than 20 hours for Bangkok and may have accelerated its retirement of the Airbus A340 afleet as a result.
Split into simpler sentences: Finnair is operating the A350 at very high rate: 15 flight hours per day for Beijing, 18 hours for Shanghai, more than 20 hours for Bangkok. This may have accelerated its retirement of the Airbus A340 afleet as a result.