Always worth asking at check-in though for the bags to goto a final destination even when on multiple tickets (have PNR ready and written down though), as I've found check-in staff (at least in SE Asia) are still quite accommodating on this. Although this may change.

But as above, prepare mentally for an exit through customs and a checkin, just in case.

The general rule has always been that if you may not interline checked bags across separate tickets. This has been the general case for IATA carriers for 60+ years and you should always presume it to be the case.

OW instituted a policy whereby it would do this for passengers transferring across tickets and accordingly when it abandoned that policy, it had to publish a specific policy exception.

There are limited circumstances, which will not work here, where it may be possible to check bags when transferring across two OW tickets. Typically that is when the two tickets are booked under a single PNR. That would be rare and would usually require an experienced TA's assistance.

Do understand that one of the benefits of a connection on a single ticket is that your bags are checked through and that your connection is protected, e.g., that if you misconnect, at an absolute minimum, the carrier causing the misconnect will rebook you.

On separate tickets, you will not be able to check your bags through and you likely will not have any protection should you no show for your onward flights. The lack of a connection may also cause immigration, customs and downstream visa issues in certain situations.

I'm in a sticky situation. In 2 months I'll fly the last legs of my DONEx ticket: MEL-DOH-JNB.

Because South African Embassy (both in Bangkok and Canberra) refused to accept my visa application (they say I have to apply in my home country), I'm forced to connect to my onward ticket JNB-MAD on IB the same day.

I cannot enter SA without a visa, so I cannot collect my bags. Do you think this qualify as extreme circumstances where they will check through my luggage?

No. That is not a reason for through checking of luggage. If you do not have a valid visa for your destination, I would be more inclined to expect that the airline will not permit you to board the aeroplane

The passenger is the one solely responsible for ensuring that they have any necessary documentation to allow entry to a country and not a special circumstance

I don't need a visa to transfer to another international flight to Europe, so they have no grounds to deny boarding.

The airline would seem to have grounds , since you would need to leave the transit area to collect bags in JNB, which would seem to require a visa.

As reported on other threads and here, OW airlines have been consistently enforcing the rule change for interlining bags. I think I only read one FT report of someone successfully having bags interlined after the rule changed. I personally experienced it this past summer on a LHR-CDG-DOH flight with two PNRs (BA first segment then QR second), BA was not bending the rule in any way regardless of my efforts. I also had issues with two connecting CX flights DPS-HKG-MNL booked on two PNRs, CX did not really want to interline even if both flight were CX. I had to insist and ask for a supervisor to push them to do it, and eventually they did. I agree that having a ticketed flight departing JNB should be enough to allow you to board in DOH. I am not familiar with JNB airport, but I assume checking bags will most likely be an issue for you without a visa to pass immigration and retrieve the bags, unless JNB QR or IB staff have a way to pick up the bags for you and take them to their check-in counter. Not sure if this is an option at some airports, I tried once in DOH (two QR connecting flights with two PNRs, asked QR to pick up my bags so I did not have to pay the entry visa etc, but they said there was no way for them to do that. I guess a last resort option would be to downsize luggage and only travel with carry on to eliminate this potential problem.

We have a master thread.

http://www.flyertalk.com/forum/onewo...kets-pnrs.html

Maybe, JL is an exception. They still interline.

BTW, OP's question is
This thread had better be moved to Star Alliance forum,
or merged to above interline thread.

The new policy returned oneworld to industry standard re interlining across tickets/PNRs. Carriers can chose to do more then that should they decide to.

UL, JL and MH will still check through across tickets.
BA and QR will not check through, period. Even to themselves.
CX will check through to other CX/KA flights.
QF and AA will check through to their own flights, will check through to other oneworld provided one ticket is an award.

I've had good success with UL, especially UL -> QR.

Also had success with QR -> QF, also QR internally.

As I posted above, assume you'll be knocked back, but it doesn't hurt to try.

helpful, tnx. I've updated the wiki on the thread where this is not there.

CX is going back to being a full service carrier, thankfully..

https://www.flyertalk.com/forum/27638488-post284.html

Cathay are reversing the no bag interline policy. Post 284 in the CX thread linked above.
http://www.cathaypacific.com/cx/en_H...e-tickets.html

Edit.
New CX link as post 177 (7 Jan 2019)

https://www.cathaypacific.com/cx/en_...e-tickets.html

CX has always interlined bags on 2 separate CX PNRs. They briefly suspended interlining when the 2nd PNR was not CX, but they are reverting to their past pratice. MH did the same back and forth.
I think that many OW airlines feel the pressure from customers, especially business pax, that their new bag policy creates. I would expect most smaller OW airlines to keep interlining on separate PNRs as a "courtesy". BA is under a lot of flack for refusing to interline BA to BA. My guess is that they might revert for BA to BA if not BA to OW.

How much does it actually cost airlines for tag a bag say SYD-HKG-LAX on 2 separate PNRs instead of just SYD-HKG ?