I wonder how many others have had problems with OW Explorer tickets. The one I used in March originated in BOS on BA. When I got to the airport, despite having a paper ticket, BA had no record of my booking for either of my BA segments (BOS-LHR LHR-BKK). I almost missed the flight as it took nearly 45 minutes for them to decide whether I had a legitimate reservation and whether there was still inventory available.

BA also wouldn't clear the waitlist for me on the LHR-BKK segment in D class (Explorer fare code for business class) despite plenty of inventory available, even down to the day of the flight where we flew with open seats. I ended up paying for that segment separately, on top of the fixed OW Explorer ticket price for my other stops...it turns out I probably could have bought a OW Explorer in first class for cheaper (no idea if "A" inventory was available on all flights).

I have a similar set of flights coming up in February/March....not sure how best to approach it this time around.