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Old Dec 10, 17, 2:43 pm
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Join Date: Aug 2002
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Originally Posted by wytco0 View Post
Silly question but what is a DIF?
You can use search if you put quote marks around the term. Try clicking here to see such a search set up.

For a more concrete example, take the following hypothetical T class fares valid for the dates of a particular trip:-
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.
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