Originally Posted by
javabytes
How far out is this flight? If it's for 3, 4, 5, 6+ months out and M fare is all that's available, I'd sit on it as DL does not fill entire planes on M fares. If it's for next week, your options are far more limited.
Agreed. For some reason Delta likes to price high when booking far in advance (like their award calendar

), but then they release much lower fares about 4-6 weeks before departure. Not on all routes, but many.