Going from a oneworld explorer to another explorer fare should be ok.
113N UPGRADING PRIOR TO DEPARTURE, THE ADVANCE
114N RESERVATION/TICKETING REQUIREMENTS OF THE NEW FARE
115N MUST BE MET.
116N .
117N . * AN ECONOMY ONEWORLD EXPLORER FARE MAY BE
118N . UPGRADED TO FIRST/BUSINESS CLASS ONEWORLD
119N . EXPLORER FARES WITHOUT PENALTY.
120N . * A BUSINESS CLASS ONEWORLD EXPLORER FARES MAY BE
121N . UPGRADED TO A FIRST CLASS ONEWORLD EXPLORER FARE
122N . WITHOUT PENALTY.
123N . * UPGRADING BY SECTOR TO BUSINESS/FIRST CLASS IS
124N . NOT PERMITTED.
125N . * AADVANTAGE UPGRADE AWARDS ARE PERMITTED ON AA
126N . SECTORS ONLY. AADVANTAGE UPGRADES ON OTHER
127N . AIRLINE PARTNER SECTORS ARE NOT PERMITTED.
128N . * ELECTRONIC UPGRADES ALLOWED ON US DOMESTIC AND
129N . US/CANADA TRANSBORDER SEGMENTS ONLY.
130N . * AT ANY TIME, THE ONEWORLD EXPLORER FARE MAY BE
131N . USED AS CREDIT TOWARDS A FULL MILEAGE FARE OR
132N . GLOBAL EXPLORER FARE, PROVIDED ALL THE FARE RULES
133N . ARE MET. NO PENALTY WILL APPLY. REISSUED
134N . TICKETS MUST SHOW IN THE ENDORSEMENT BOX: NON-
135N . REF/XXX
136N . /THE XXX INDICATES THE ONEWORLD EXPLORER FARE
137N . BASIS CODE./ THE ORIGINAL NON-REFUNDABLE AMOUNT
138N . REMAINS NON-REFUNDABLE. IF THE UPGRADED TICKET IS
139N . SUBSEQUENTLY CANCELLED, THE ORIGINAL PENALTY WILL
140N . APPLY.
141N LOCAL SERVICE
142N FEES MAY APPLY.
http://www.jeah.net/~markdu/OWFiles/OneExplorer.html
(4) At any time the oneworld Explorer fare may be used as credit towards a full mileage fare or a
Global Explorer fare (provided the conditions of Global Explorer have been met). No penalty will
apply. Reissued tickets must be endorsed --NON REF/XXX--//XXX equals oneworld Explorer fare
basis code//and the original non-refundable amount remains non-refundable. If the upgraded
ticket is subsequently cancelled the original penalty will apply.
http://www.oneworld.com/content/libr..._13dec2007.pdf
Going from a circle pacific to a oneworld explorer isn't specifically stated as with ONE-ONE or GLOB but may be possible.
154N . 6. AT ANY TIME THE CIRCLE PACIFIC FARE MAY BE
155N . USED AS A CREDIT TOWARDS PAYMENT OF A HIGHER FARE
156N . TYPE FROM THE POINT OF ORIGIN PROVIDED THE
157N . CONDITIONS OF THE HIGHER FARE TYPE HAVE BEEN
158N . MET.
http://www.jeah.net/~markdu/OWFiles/OneCirPac.html
(F) At any time the Circle Pacific fare may be used as credit towards payment of a
higher fare type from the point of origin provided the conditions of the higher fare type
have been met. Reissued tickets must be endorsed --NON REF/ XXX-- (XXX equals
Circle Pacific fare basis code) and the original Non-Refundable amount remains Nonrefundable.
If the upgraded ticket is subsequently cancelled the original penalty will
apply.
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Local Service fees may apply
http://www.oneworld.com/content/libr..._13dec2007.pdf