Cathay Pacific Asia Miles - Where to check on-time statistics for CX509 ex-NRT?

Is flightstats.com a good source to check on-time statistics for specific flights?

I'd like to check this for CX509 NRT-HKG, and according to flightstats.com, its on-time rate is 96% (based on 60 flights), which sounds good to me. Is it true that CX509, due to its departure time of 9:15am, normally sits overnight at NRT, so there's a lower chance of delays due to late arrival of inbound equipment? (I called CX but the agent couldn't answer this question for me.)

Is flightstats.com a good source to check on-time statistics for specific flights?

I'd like to check this for CX509 NRT-HKG, and according to flightstats.com, its on-time rate is 96% (based on 60 flights), which sounds good to me. Is it true that CX509, due to its departure time of 9:15am, normally sits overnight at NRT, so there's a lower chance of delays due to late arrival of inbound equipment? (I called CX but the agent couldn't answer this question for me.)

Yes, usually, CX509 is 777-300, and same aircraft of CX500 of previous day.
Probably, same crew of the CX500 on board.
I have flawn CX509 12-14 times a year, and it has very good ontime performance.

Yes, usually, CX509 is 777-300, and same aircraft of CX500 of previous day.
Probably, same clue of the CX500 on board.
I have flawn CX509 12-14 times a year, and it has very good ontime performance.

Thanks for the feedback, which is encouraging. I'll go for CX509.

Is flightstats.com a good source to check on-time statistics for specific flights?

I'd like to check this for CX509 NRT-HKG, and according to flightstats.com, its on-time rate is 96% (based on 60 flights), which sounds good to me. Is it true that CX509, due to its departure time of 9:15am, normally sits overnight at NRT, so there's a lower chance of delays due to late arrival of inbound equipment? (I called CX but the agent couldn't answer this question for me.)

Expertflyer rates it at 95% ontime, with the average delay being 22 minutes. This is based on the last 2 months.

Expertflyer rates it at 95% ontime, with the average delay being 22 minutes. This is based on the last 2 months.

I compared this to flightstats.com, which rates this flight 96% ontime (based on 62 flights), with an average delay of 9 minutes (based on 10 observations). Not sure if I'm interpreting the results correctly, but it's interesting to see the 2 sites with similar ontime rate but different average delay time. Could be due to the number and/or timing of observations?

In general, which are the most trustworthy sites? Or do people just consult one or two sources and make their own judgement?

I think flightstats.com is more reliable. Based on HKG-LHR on CX, EF rarely shows the days of operation accurately IME, let alone the frequency reliability.

I compared this to flightstats.com, which rates this flight 96% ontime (based on 62 flights), with an average delay of 9 minutes (based on 10 observations). Not sure if I'm interpreting the results correctly, but it's interesting to see the 2 sites with similar ontime rate but different average delay time. Could be due to the number and/or timing of observations?

In general, which are the most trustworthy sites? Or do people just consult one or two sources and make their own judgement?

We get our ontime data straight from Flightstats under a contract we have with them. I can't explain the slight differences other than the time frame of the data used to calculate the results. There may be a one day difference in the time frame.