How to specify the booking code on ITA
I have a friend at ITA who has kindly provided me with some info about extensions to the ITA "routing language" that are not documented on the ITA website.
First up: how to specify the booking code
The extensions to the routing language are accessed by postpending commands after a '/'. There's a wide set of commands available, but there's no description of them available on the ITA web site. Unfortunately, each command applies only to one part of the trip, so they must usually be entered in each box.
CONSTRAINING BOOKING CODES:
Command is: "f bc=X" or "f bc=X|bc=Y|..."
Ex: Limit each part of the trip to travel on United and booking in the
L booking-code:
from: BOS:: ua+ / f bc=l
to : LAX:: ua+ / f bc=l
Or with multiple booking-code choices and no airline restriction:
from: BOS::/ f bc=l|bc=m|bc=y
to : LAX::/ f bc=l|bc=m|bc=y
More to come…