More on this.
The use of "ticketed with" has no meaning as to points earning generally; a booking can be made "on the Stock" of many airlines.
Look at you ticket number (3 digits, maybe a '-' then another 10 digits); VA ticketed bookings sdtart with 795- (QF is 081-, AA is 001-).
Frequestn flyer proma earnings with VA/ and QF are based on the "Marketing Carrier" with reference top booking classs./
For frequent flyer earning, yes, it's the marketed flight number that matters. However, for baggage, the relevant
minimum allowance is what your ticket says. (This is regulated in the US.) The ticketed allowance will normally be set by the marketing carrier of your first long haul segment and it should be listed on your eticket. If your Australia-LAX flight is marketed by VA, it will probably be 2x23 kg in economy; if your Australia-LAX flight is marketed by DL, it will probably be 1x23 kg in economy. This allowance should then apply for the rest of the ticket, including domestic flights on Delta (as long as they're on the same ticket).
Note that any additional allowance based on your elite status is
not part of the ticketed allowance, so Delta does not need to honour it on domestic segments in the US, even if the flight is VA-marketed. (They of course can legally choose not to charge you their fees for whatever reason they like, including VA elite status, but are not obligated to and Delta doesn't say anything on their web site about granting bag fee exemptions to VA elites.)
See the
rule from the US DOT. Specifically, page 23167 of the document (the last page), S399.87 (emphasis added):
For passengers whose ultimate ticketed origin or destination is a U.S. point, U.S. and foreign carriers must apply the baggage allowances and fees that apply at the beginning of a passenger’s itinerary throughout his or her entire itinerary. In the case of code- share flights that form part of an itinerary whose ultimate ticketed origin or destination is a U.S. point, U.S. and foreign carriers must apply the baggage allowances and fees of the marketing carrier throughout the itinerary to the extent that they differ from those of any operating carrier.
In practice, I'd be sure to have my eticket with me which lists the ticketed allowance from VA of 2 bags and show it to any Delta agents who try to give you less. I certainly wouldn't be surprised if Delta agents (out of ignorance, not malice) try to charge you fees for any bag over the normal Delta Australia-US baggage allowance even though the VA allowance legally applies. A copy of the DOT rule might help too, though human beings don't generally take well to lawyering like that.
(This is all my understanding.)
