Originally Posted by
Diabo
SkyTeam
Delta
+ Miles never expire if you have any account activity once every 24 months.
+ Miles for clicks (eMiles*), surveys (e-Rewards*), games (bing*), and shopping (Barnes & Noble and other online stores) keep your miles alive for another two years.
- One way award tickets for half the miles only on Delta flights, not for other SkyTeam airlines.
- Availability of standard reward flights sucks, available reward flights often cost an obscene amount of miles.
- International Originating Surcharge for trips starting outside the USA.
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I may be wrong, but I don't think this is correct -- my understanding is that on Delta one way rewards always cost as much as roundtrips. Even more of a negative.