I just very recently read that BA-coded flights operated by other airlines on a oneworld RTW ticket can earn distance-based TP rather than spend-based. However, reviewing my flights from the past year (since April), all the RTWs issued NOT by BA, some segments earned distance-based while some were spend-based. Any idea why the difference?

Does it depend on whether the flights were taken right after the first issuance of the RTW (hence clearer spend?) vs reissuance later obscure the fare details, triggering distance-based earning for subsequent flights?

Without concrete examples, it's impossible to weigh in here.

Look and ask here -- https://www.flyertalk.com/forum/brit...questions.html
From what I read is hard~impossible to predict

As a regular DONEx user, and a BA creditor of said TPs I would observe that, at least on AA and BA coded flights (including when there are IRROPs) issued by the AA RTW desk, we now have full transparency of pricing in 9/10 cases, which isn't very good for nTP earnings. The only real way to boost your numbers from RTW tickets is to book on QR and JL. However be aware that it doesn't always work out that well. See below for my ill-fated Christmas trip disturbed by first weather in JFK and then the Venezuela military operation:

https://cimg2.ibsrv.net/gimg/www.fly...2d102598f6.png
Analysis of a recent RTW set of flights with BA crediting.

With the IRROPs occurring around the AA flights, that meant I didn't get my QR flights, even with the "new" routes, in the old system I'd have been 40% of the way towards Gold, in the new system its less than 20%

A data point would like to share on BA earnings with DONE4, and happy to discuss particularly on the AA domestic sectors
Wasn't expecting both AA coded and operated domestic flights to earn with distance-based instead on revenue-based. Understood the earnings with AA vary from ticket to ticket. Ticket was issued by CX and made roughtly 8 changes on the flight date from time to time so far i started my first sector. HND-DFW-JFK-LAX-DOH are basically considered as "transit" given I booked everything to connect within 24hours, but not sure if that's the reason(if so it would be rather interesting).

Lastly, both AA flights get credited to my BA account roughly one day after the flight, and the QR LAX-DOH even gets credit while I'm mid-way to DOH :p , which i consider that's the fastest earning even happend to me

My routing is
OSL-DOH (AY code operated by QR)
DOH-AKL (AY code operated by QR)
AKL-SYD (QF code operated by QF)
SYD-HKG (AY code operated by CX)
HKG-SIN (CX code operated by CX)
SIN-HND (JL code operated by JL)
HND-BKK (JL code operated by JL)
BKK-HND (JL code operated by JL)
HND-DFW (JL code operated by JL)
DFW-JFK (AA code operated by AA)
JFK-LAX (AA code operated by AA)
LAX-DOH (QR code operated by QR)
DOH-DUB (QR code operated by QR)
DUB-DOH (QR code operated by QR)
DOH-OSL(QR code operated by QR)

So how many tier points did you get on each segment? We're they all distance based? At the rate of the marketing or operating airline? It's not very clear. Thanks!

Except for the last three sectors, which will only travel in mid-June, the rest are all credited as distance-based on the rate of the marketing carrier.
As long as marketing and operating carrier is not involving BA/AA/IB, I would say flight calculation from BA provides accurate numbers.

Have finally coughed-up for a D class RTW fare :
TYO AY X/HEL AY LON AA(BA) X/LAX QF BNE QF CHC//AKL CX HKG CX CGK JL TYO

I have Basic membership of AY & BA schemes & use BA-AX card for spending to accrue Avios. I’m not wildly interested in Status, which Membership will generate the most Avios please?

Thanks. For me the critical point is that the following were credited by distance:
DFW-JFK (AA code operated by AA)
JFK-LAX (AA code operated by AA)

Can you confirm that you got 50% distance on those?

This would be consistent with my experience, getting 50% of distance flying LCA-LHR on BA on a DONE3 issued by JL. I am now on a CX-issued RTW but so far haven't tested AA or BA segments, and the previous comment made me a bit concerned, since I'm down to the wire in terms of requalifying as BA Gold.

Got 696 nTP(5217 avios earned) for DFW-JFK and 1231nTP(9230 avios earned) for JFK-LAX, so its 50% of the actual flying distance and avios earning is roughly 375% as a BA gold, not sure if that's also due to a transit from a JL flight beforehand.

I found AA's earnings on BA's new earnings scale could be hard to predict on such occasions; probably this could also happen to BA/IB coded and operating flights as well. Might still avoid BA/AA/IB flights as much as i could in furture RTW ticket even its issued by non-BA/AA/IB

Many thanks - this is useful. I think the key thing here is still visibility of fare by issuing airline, so hopefully I should be good with a few more segments on AA/BA on my current RTW. I'm seriously considering switching to AY after requalifying as it seems more predictable.

I can confirm BA can see the fare paid on JL issued RTW tickets. but once changes start piling in VOL+INVOL the fare gets obscured enough that system will pick up the distance for AA/BA/IB sectors. there is no guarantee when this happens - but on my own AONE3 my ba segments earned spend on new + 1st reissue and after 2nd reissue started earning distance based

Any experience on how TPs work with RTWs booked with BA?

But presumably JL segments on JL issued RTWs are still distance based?

Way off topic
Look and ask here in the dedicated BA thread-- https://www.flyertalk.com/forum/brit...questions.html
From what I read is hard~impossible to predict