Originally Posted by
Tedgrrrr
this was the worst hack ever - NO one, not even people in the US (let alone the Swiss Air people) - seemed to believe me when I showed them that these flights were eligible for C+ on day of travel.
I just do the OLCI as soon as it opens. The app asks you if you like to get on the list for C+ upgrades and whether you'll accept a middle seat or not.
I think the main advantage of this hack is that you can select seats (including exit row and seats in the first few rows of main cabin) at the time of booking.
If you happen to get an upgrade to C+ on the DoD, great. If not, you're paying the same price as DL Basic Economy but getting complimentary ASR by going the AF/KL codeshare route.