# Flight and segment

Ranjay Sinha
Greenhorn
Posts: 4
If Flight & Segment has 1 to 1 relationship then this means 1 segement has only 1 flight. Let under segment A to B, there is flight F001, then does it mean there's only one flight which operates at different time from A to B. what about return flight from B to A? Assuming segment (which is identified by AB) Is A to B is same as B to A? assuming yes then same flight F001 should be used in return flight as well. Can anybody think otherwise?

Ranjay Sinha
Greenhorn
Posts: 4

http://vacations.traveltime.com/c/17/17580/1796569_17580.htm

Infact return flight is also an another segment and not what I was thinking.

Shogo Ito
Greenhorn
Posts: 25
Most major airlines' definition of a segment is: "A flight segment is defined as all travel under a single flight number."

Flight #111 JFK-SFO (non-stop) is one segment.
Flight #123 JFK-SFO (one stop at ORD) is one segment.
Flight #222 JFK-ORD & #333 ORD-SFO is two segments.

I know some don't agree You make your judgement and justify your position in the assumption.

Joyce Lee
Ranch Hand
Posts: 1392
I agree with you, Shogo. Here's my definition of a segment.

Joyce