Originally Posted by Lootsy1031
X and R are ONLY for 500-mile upgrades (you know -- the ones that clear 100, 72, or 24 hours out, depending on your status).
Hope that helps.
How/why would it show availability in R if on an international (Europe) AA flight???
(one I'm looking at has "R7" JFK/FCO, 5/5/05, AA #166 (as of now it's r7)
And, if a seat map shows several seats available (on another int'l flight I'm looking at) yet "C0", that just means that they havne't "released" those seats for "C"/miles-based upgrades, right??