Originally Posted by
JALsnipe
Interesting, thank you for the correction. So even if there's C only available via a married segment and not nonstop flight that you're actually taking, you can still SDC because there's C inventory available?
No, in that case, you wouldn't be able to SDC to it. You need inventory on the intended itinerary. What you don't need is a valid
fare.
It may not be an issue with C, but it's definitely an issue for discount economy. I have a flight coming up in W that I'd like to SDC. It's quite likely that there will not be a 0-advance-purchase W fare available -- generally those require an H, an E, or even higher (admittedly, it varies by market, but for the sake of argument, let's assume this is the case). If there is W inventory on EF for the itinerary I want to take, I will be able to SDC, even though I could not buy a W fare due to the AP restrictions.