Originally Posted by
channa
Remember, too, that CO uses a very optimistic operating philosophy, and as a result, there's not much slack or padding in CO's system. So, if there's a longer-than-normal flight time, CO is less likely to be able to absorb it.
The difference amounts to 10 minutes eastbound and 10-20 minutes westbound. Note CO uses slower B73x equipment on many of their flights, while UA is all B752, which makes CO even more optimistic.
From the current schedules:
Code:
carrier | origin | destination | max | avg | min
---------+--------+-------------+-----+-------+-----
CO | LAX | EWR | 320 | 312.5 | 299
UA | LAX | JFK | 330 | 320.7 | 318
CO | SFO | EWR | 332 | 322.4 | 310
UA | SFO | EWR | 333 | 333.0 | 333
UA | SFO | JFK | 345 | 333.0 | 319
carrier | origin | destination | max | avg | min
---------+--------+-------------+-----+-------+-----
CO | EWR | LAX | 380 | 363.3 | 349
UA | JFK | LAX | 387 | 382.1 | 374
CO | EWR | SFO | 385 | 378.1 | 369
UA | EWR | SFO | 388 | 388.0 | 388
UA | JFK | SFO | 408 | 400.2 | 394