VS4ever wrote:Ok, so as promised, I figured out how to do the OTP for BDL, file is linked below, data thru September 18
https://drive.google.com/open?id=1nkYoU ... EUSQXpZPR5
Like any tables from the DOT they have their limits, here's this tables:
1. Data only from Jan 2018, no previous comparatives at the regional carrier level available, although total carrier level is available for prior years i have ignored this for the purposes of the exercise.
2. Domestic, PR and USVI only, no international data available.
3. Carriers reporting: DL, UA, AA, WN, B6, NK
4. Carriers reporting regional ops, DL, UA, AA
5. Main Data is BDL, however I know a user of this thread is a big HVN fan, so somewhere buried in the data maybe an easter egg for that person...
7. For this version, i have done a Month (Sep) , QTD (Q3), YTD (Jan to Sep).
How the report works:
This month, I have figured out how to pull which Tail for each airline has passed through BOS the most, it does not give me actual model data, but for future months i may look that up if I can. I have added the Tail number and the number of times it passed through. For a couple of airlines, the data is not 100% complete, so the largest number is a "blank", so I have gone with the next largest number to have a reference.
Section 1 -
a) Bidirectional data of number of flights, cancellations and diverts, showing a net completion # and % along with a rough average stage length, grand totals attempt to be weighted average, still working through that.
b) Average Elapsed Time is total flight time including air and ground, separated by air and ground underneath. Ground time is effectively a combination of Taxi Time out (departure) and Taxi Time in (arrival) at the relevant airports.
c) # of aircraft used: this is quite awesome information, although i wish it was just a little more detailed, basically this table has "tail reg" information, so i can actually count how many aircraft are used by each carrier. I can actually dive into how many on a particular route if needed, but i do not have aircraft types or load factors in these tables, so please do not ask if i do!. However what I DO have is which aircraft are used on which route on a given day and by flight number, and times if you are interested, please ask. I also have the detailed tables for each airline, but be warned they are big, so it's unlikely i can send them directly to you.
Section 2 -
IMPORTANT NOTE: This is OUTBOUND from BOS only information, so it's not the same as section 1.
# of flights, cancellations and diversions for a % completion factor, # of departures per day is based on the the gross number not the net and remember does NOT include international, so complaining that DL are at 115 for example and the data is wrong, is incorrect, because as noted, it's domestic only.. sorry.
Also OUTBOUND only
This is On Time Performance, so net of cancellations, how many were delayed out of BOS, On-time as defined by DOT is leaving less than 15 minutes late, % OTP to see who is doing better than others. The departures per day shows how many flights are getting off the ground as opposed to section 2, which is how many are supposed to each day.
I'm still getting to grips with this section, however basically a breakout of the key delay factors reported by this table i am working with. Carrier Delay is delays caused by non-aircraft carrier activities, Weather and ATC are obvious, then there is Inbound aircraft delay as well. ALSO OUTBOUND from BOS info.
Breakdown of why flights are cancelled by category, whether by the carrier, Weather or ATC
Breakdown of how long flights were delayed for and how many
-2 to 0 - on time
12 = 180+, no limit, others are blocked by 15 minute intervals.
Highest and Lowest in each section, for those with multi-carriers, i have split those out on separate tabs for viewing along with ORH information for B6.
Month - September[/u]
DL takes the flights completed award with a perfect 100%, all 453 completed, runner up was WN that got so close, but had 1 diverted, bringing up the rear was AA with 20 cancellations and 2 diverts for 96.96%. Piedmont and Trans States were the killers for AA, sadly.
DL also led the On-time departure list with a 93.6% rating a full 2.5% ahead of WN and nearly 9% better than also ran AA and 5% better than the overall average.
Overall 73% of flights departed early, Winner in this category was NK with 81.7% followed by UA with 80.7% However once you get past that, everything flips with the on-time 0-15 minutes late category going to WN with 23.5% and DL with 16,6%, UA drops to 6.7% and NK 8.4%
In terms of reasons why flights were late, AA got hit with 34 minute ATC delays, NK close behind with 32. , B6 suffered from inbound aircraft being 29 minutes late (UA was second with 27) and B6 drove the most carrier delays at an average of 16 minutes.
One interesting stat is that clearly AA was taxiing their planes to Hartford and back, as they took 15 minutes compared to DL's 5.. either that or the ATC guy is a relation of one of the big DL Fan Boys on this site.
23 flights out of 2,401 recorded (domestic-outbound only) were delayed more than 3 hours. More surprisingly, 32 flights departed more than 15 minutes Early with B6 managing 13 of those.
[u]YTD - September
DL had the best completed record YTD with 98.84% making it out of 4,303 outbound flights with 44 cancelled and 8 diverts, runner up was NK with 97.59%, 30 cancelled and 2 diverts, last place went to AA with 95.88%, 330 cancelled and 13 diverted on 6,774 flights logged.
For On time performance . DL wins hands down with 88.14%, a nearly 4% lead over 2nd placed WN , bringing up the rear, old favorite B6, with a 73.42% on 2,664 flights.
Overall 64% of flights departed early and UA was the leader with 74% of theirs going out in that category NK a close 2nd, WN brings up the rear with 51.9%. WN claws itself back in the ontime category with a whopping 32% of flights departing in that time frame.
The late category shows B6 having over 4.7% of their flights delayed over 2 hours. Next up was NK with 3.8%, WN did best at 1.5%
In terms of reasons why flights were late,
NK- 43 minute ATC Delays
NK - 40 minute inbound aircraft delays, WN with 39
DL - 31 minute carrier delays
299 flights delayed more than 3 hours, 203 left more than 15 minutes early
Anyway, plenty more data for you to look at in the file. Enjoy.
Depending on time, i might do one more, so you guys get to vote.. would you like to see
a) RI with PVD
b) VT with BTV
c) ME with PWM and BGR
d) NH with MHT and PSM
As always thanks for you hard work on this thread as well as the Boston one as well. As a Manchester fan I’d love to see that list but I may be the minority here.