Originally Posted by
wytco0
Silly question but what is a DIF?
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For a more concrete example, take the following hypothetical T class fares valid for the dates of a particular trip:-
Code:
TLXRC1UKF/DIF4BA T Round-Trip 766.00 (GBP)
TLXRC1UKF/DIF4BA T Round-Trip 806.00 (GBP)
TLXAPGB BA T Round-Trip 1103.00 (GBP)
The way that the DIFs work is something like this: For any of these fares to be used, there must be T class availability. If there is S class availability, then the £766 fare can be used. If there is no S class availability but there is N class availability, then the £806 fare can be used. If there is no S class or N class availability, then the £1103 fare is the one used to price the trip.
The actual rules for each fare will be specific to itself, but this should give you an idea of the mechanism involved.
The way that BA is currently using DIFs, it is very difficult in respect of each DIF to know which economy booking class must have availability. Other airlines' DIFs are more transparent, as indeed BA's previous method was.