I would love some help from the experts with a routing we are looking into for departure July next year, in coach. One of us will go by CIRPAC and the other on a OneWorld award flight:

BNA-DFW-OGG on AA
OGG-HNL-KIX on AA codeshare
KIX-HKG-CNS-DRW on CX/QF, not stopping in HKG or CNS
DRW-ASP on QF
ASP-MEL on QF
MEL-LAX-BNA on QF/AA

There are better connections from Osaka to Darwin on QF/codeshare, but we need to fly CX because the oneworld award requires 2 carriers other than AA if you are using AA miles (which we are). As far as I can tell, I am OK on stopovers for the CIRPAC (five) but I need to purchase two more rather than one (you get 4 for free on CIRPAC) as you are only allowed one in Australia.

My questions are whether that routing fits the CIRPAC fare rules, and what seasonality would apply. Thanks to you all for your help.

I'm not an expert on this fare, but accoring to the rules here: http://www.hardlink.com/~markdu/OWFiles/OneCirPac.html

147N . * TRAVEL ON ANY QF/AA/AX/CX/BA/LA/LP/AY CODESHARE
148N . SERVICE OPERATED BY QF/AA/AX/CX/BA/LA/LP/AY IS
149N . PERMITTED. OTHER CODESHARE SERVICES NOT
150N . PERMITTED.

which implies to me that you have a problem with the OGG-HNL-KIX part.

Christep, that information is much appreciated - not least because the star data is COMPLETELY different from what I had been reading (FewMiles update needed). It also completely kyboshes that fare for any trip involving Japan-Hawaii from the USA as I can't find an AA/permitted codeshare metal flight between Japan and Hawaii, and the fare rules prevent backtracking between Hawaii and the West Coast.

Interestingly though, with BNA-ORD-NRT-MEL-LAX-BNA on Great Circle sneaking in under the 22,000 mile limit by 300 miles, those changes do open up a great opportunity to get to Melbourne from BNA in D for $4900 - about $1500 less than a consolidator fare for the same trip, and about $800 cheaper than the Incentive Traavel Flight Certificate price. A for the same trip would be $7100. Downside is going via NRT instead of "semi-direct" via LAX, but when you consign yourself to 20 hours in a steel tube you get philosophical about long flights.

So perhaps not all doom and gloom as I head back to the drawing board....

You can backtrack between Hawaii and the West Coast on the Circle and Global explorers. Just not on oneWorld Explorer. You just use up a lot of your allowed mileage this way.