Sure they do.

I've double-checked and triple-checked all details. They are all correct and they absolutely do match a scheduled flight.

Maybe the error message is poorly written and not technically correct (I suspect that's the case).
Maybe the service does not provide what I'm looking for (I'll be super-disappointed).
Maybe it's user error (could be!).
Maybe it's all of the above (tsk tsk).

I'm trying to set a "Flight Alert" for an American Airlines flight in late September 2017.
My initial goal is to be alerted when any seats for this flight load into the AA system.
My secondary goal is to watch for "U" class (Business Saver) seats when they load.
I'm setting up a "Flight Alert" (well, trying to...) with the correct departing & arriving airports, the departure date, the airline and U class code. I've entered all these values correctly.
Yet when I click "Verify and Create", it coughs up the error: "The flight details provided do not match any scheduled flight."

That is not a true statement.

The flight is indeed scheduled. The details I'm plugging in are correct. AA is selling seats on that flight today, right now - I go to their website, it offers to sell me seats. It is most certainly a "scheduled flight."

Now, admittedly, inventory for seats on this "scheduled" flight (which has been scheduled for months) just loaded today (within the past hour or two). If I try to set up the same search for the same flight tomorrow and the next day (which is what I really want - today was just a test run), that inventory is not yet loaded into AA's system, but the flights tomorrow and the next day are definitely scheduled.

Now, although I think there's something broken about the error message I keep getting, I'm more interested in results, so here's my question:

I'm trying to set an alert (so I can be notified, immediately) when award seats load for flights that are around or just barely beyond the 330-day inventory window. I want to be alerted, immediately, tomorrow and the next day, when EF sees inventory loaded for the flight I'm targeting. How do I accomplish that?

Setting a "flight alert" for the flight seems to be failing (because EF doesn't recognize the flight's date as valid - even though it is).

???