Competing on the basis of frequency of service is another major, yet seldom mentioned factor, in passenger choice and airline operating costs. For example 10 flights a day versus 5 flights a day..
Non-stop or stop-overs? Connecting flight or direct?
The airport is also a factor. To or from Newark or Laguardia? Heathrow or Gatwick? Vancouver or Abbotsford? Los Angeles or Burbank? It all depends...
Too many factors, too much thread drift..