SkyTeam Mileage Upgrades

From http://www.skyteam.com/en/Why-SkyTea...-Redeem-Miles/

Available on purchased international, published, full fare Economy Class reservations on the following airlines:

Aeroflot - S, Y
Aeromexico - Y
Air France - Y, S
China Southern - Y
CSA Czech Airlines - Y, M
Delta - Y
KLM - Y, S, X
Korean Air - Y

The full fare requirement means if you search around you can often find discounted business class tickets at cheaper prices, but may be useful if for example your employer policy is only to allow the purchase of economy class fares. Air Europa, Alitalia, Kenya Airways, TAROM and Vietnam Airlines don't as yet participate.

The flight must be marketed and operated by the same SkyTeam carrier, as code-share flights are not permitted. Call the award reservation line of your frequent flyer program where the miles will be deducted. The agent will verify eligibility and confirm the upgrade if seats are available.