I need to have my AONE3 reissued before my next flight (BOS-ORD). Will the ticket counter at BOS be able to handle this? Does it take a lot of time?

Any AA ticket counter can handle it but many will duck and run when they see it. My last reissue with AA took 7 hours. Typical is 2-3 hours. The 7 hour one was that short only because everything was prepared in advance, including pricing and tariff mask (but had to hand write it). The official policy is that airlines can require 24 hours for ticket reissue, so if this matters to you maybe best to do it the day before. Fastest I ever had was 15 minutes by CX in HKG, but I had faxed in my ticket the day before so everything was prepared before I got to the airport. Fastest by AA was at LAX in under an hour but there were only 3 segments left on the ticket! Still took an hour, and the agent was working hard the whole time.

It depends on where your ticket was issued, and if it's a handwritten or auto ticket.. and whether if you have many more segments to go...

If it's an AA issued ticket, then it would be easier as AA Intl Rate desk can look up your PNR and note ticketing details from there. If another airline issued your ticket, then the AA agent would have to manually create a new booking, and queue it to the Intl Rate Desk, and let them figure it out - which will take some time.

My ticket originally was issued by the AA city ticket office in BKK. Interestingly, the AA RTW desk was not able to find any record of my ticket (even after I provided them with the AA ticket number), so they took my word for it in terms of the segments I had traveled (which resulted in my getting an extra N. America segment for free, not because I intentionally took advantage of the situation, but because I forgot that I had traveled JFK-BOS after arriving from HKG), and they just made a new reservation for me. The RTW desk warned me that it would take a while to have the ticket reissued, and since my next segement is Monday morning, they recommended that I drop it off at the airport over the weekend, and then pick it up on Monday when I check in for my flight.

So I drove to Logan on Saturday afternoon and went the "future ticketing" desk next to the AE checkin area. The agent looked at me like I was nuts when I suggested that I would drop off my ticket and pick it up on Monday; she said it would take a while, but that I would have to stay (good thing; she had several questions for me as she did it). She immediately got on the phone with the tarriffs department, and the two of them remained on the phone for over an hour while they worked out the reissue its pricing. (The agent I was dealing with was wonderful, and managed to help quite a few other passengers while on the phone dealing with my ticket.) The whole process took about 70 minutes from when I first approached the desk until I walked out the door.

There was, however, one minor glitch that, fortunately, I was able to rectify easily. Later that night, I checked my reservation on aa.com and noticed that my first two segments (BOS-ORD and ORD-LAX) had disappeared. I had the physical tickets for these flights in hand, so I assumed that this was just some sort of aa.com glitch. I called the EXP desk to verify this, and the agent said that she didn't see my reservation for those segments either; they had somehow disappeared. Fortunately she saw in my PNR that they had existed at one point, and she easily restored them.