Originally Posted by
Often1
If your ticket originates or terminates in the USA, the baggage allowance for the marketing carrier of the first segment applies to all remaining segments. For purposes of this response, we're going to presume its a USA ticket at one end or the other.
If you purchase a single ticket and the two (or more) carriers have an interline baggage agreement (likely unless your domestic is on WN or somesuch):
A-B Carrier #1 (domestic)
B-C Carrier #2 (nternational)
C-B Carrier #2 (international)
B-A Carrier #1 (domestic)
Your baggage allowance for B-C-B-A will be whatever Carrier #1 (presuming that it is not only the operating, but marketing carrier) provides for a baggage allowance (stripped of waivers for elite status and the like).
If your two (or more) carriers do not have an interline agreement or your connection is too long (overnight in most cases), you will have to collect your bags and pay anew if your allowance does not cover whatever it is that you are checking.
If your ticket does not touch the USA, ignore this post !
Thanks for this explanation! That's very simple, except I don't understand what the "marketing carrier" is? Does that mean if I buy a ticket through United for a code-shared flight then United is the marketing carrier? What I buy the ticket through Vayama-- would UA still be the marketing carrier?
Also, I was under the impression that IATA had decided that for domestic-international that the international carrier's rules apply, but you are suggesting that is not the case for a flight beginning or ending in the US?
This question was recently prompted by a recent US domestic roundtrip where I was charged for luggage in one direction and not the other, but it sounds as though perhaps that was just a mistake?