Jetstar has its own checked baggage allowance (which you have to pay a fee for), but for passengers travelling on a flight marketed as Qantas and with a Qantas flight number but operated by Jetstar, the Qantas checked baggage allowance applies. The additional checked baggage allowances that apply to Qantas frequent flyers and club members do not extend to Jetstar operated flights except for those booked in business class on international flights.
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Baggage transfers between Qantas and Jetstar become complicated when they involve connecting flights. If you’re travelling on a Qantas domestic flight and connecting with a Jetstar domestic flight, or vice versa, Jetstar does not transfer bags on domestic services, therefore you need to collect your bags and check in for the connecting flight. If you’re transferring from a Qantas domestic or international flight to a Jetstar international flight, you can usually check yourself and your baggage through, but not if it’s from Jetstar domestic to either a Jetstar or Qantas international flight.
If I’m booked with Qantas but flying Jetstar, do I get a meal?
Entitlement to inflight service is also complicated, and it usually depends on the route. For those booked with Qantas on a flight operated by Jetstar, if it’s a domestic flight or a trans-Tasman flight there will be no free food and beverage, they must be purchased, the same as any passenger flying on a Jetstar ticket. But if it’s a Darwin to Singapore service then a meal pack and a blanket and neck support are provided. For passengers who booked a Qantas award seat but flying Jetstar, food, beverages and entertainment are not included except for those travelling business class on international flights.