Why Switching Flight Number Occasionally?

Tue Jun 05, 2001 12:35 pm

I am wondering that why do some major US airlines switches their flight number so occasionally. (like switching flight numbers every 3-6 months; especially their Domestic flight, although some international flights are also involved)

For example: NW's NRT-TPE flt in 1998 is NW011/012. But in 2001 (currently) the flt becomes NW007/008.

Another example: TW's YVR-STL flt in 2000 are 10 and 58x series. In 2001, it becomes 590/640

I also noticed that some airlines switches flight numbers involving code-share flights.

Any one know why airlines switches their flight number so occasionally? Don't airline usually switches flight number after a fatal crash?
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RE: Why Switching Flight Number Occasionally?

Tue Jun 05, 2001 1:13 pm

CO seems to do this quite a bit on domestic flights. But from my point of view, the numbers stay the same, but the destinations change; IE, CO 1507 has operated MCOIAH for about a year, but where it goes from IAH has changed at least three times since the first of the year. I think it currently ops MCOIAHAUS, before that it was MCOIAHSFO, etc. A fairly large number of flights follow this same pattern.
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