Originally Posted by
TerryK
Domestic or international?

It should be even higher for transpacific flights as many Asians don't sign up for FFPs. Many of them are on group fares and many Asian airlines don't give mileage for group fares. They don't bother to sign up even though DL may give mileage for group fares.
I still find it plain stupid not to sign up for DL SkyMiles, especially under the current terms - no expiration date for miles.
DL miles (yes, Skypesos, worth whatever) can be earned through so many channels that getting enough for an award ticket takes very little time, but a little bit more discipline...
"I don't fly that much" is not an excuse - and yes, as someone pointed out above, it is incomprehensible to me (and many FT-ers here)