I’ve researched this fare a bit, and it seems to be legitimate. However, I figured I’d post about it before doing too much research, as I don’t want it to disappear.
Per FlyerTalk member IAkH, there seem to be some incredible ~$1,600 roundtrip business class fares on Delta bookable between the Los Angeles area and Singapore. The fare isn’t valid for travel out of LAX, though is valid out of surrounding airports, like Ontario. Blackout dates apply over December 9 through 25, 2016, and June 9 through July 16, 2017, but otherwise availability is wide open. Some segments price on ANA, Asiana, and Korean Air, though the transpacific segment seems to be on Delta in all cases.
The fare shows through Expedia, so book there, and then you’ll have 24 hours to cancel, if you decide to change your mind.
You can credit these flights to any of Delta’s partners. For example, “Z” class earns 150% elite qualifying mileage through Delta SkyMiles, or 125% elite qualifying mileage through Alaska Mileage Plan.
Hurry, this fare won’t last!