Not necessarily. It all depends in which Y fare BA6948 was booked, but the fare difference to W can be much higher than that.

The fare difference when I tried to self upgrade was in the region of €900. I am in Class U. Last time I was in class U, the offer was €549 for upgrade to W. So it is all random. Can't really understand the new system.

You might be right of course, but looking at fares from e.g. NL or UK (via CDG) an A fare in PE is around 750€, a U fare in economy is then more expensive...
From CDG an A fare seems to be a whopping 1800€ though :confused: (and U is then at around 1500€)

The new system is quite simple. Revenue management decides upon the upgrade price depending on a few factors.

They especially have to make sure that people still buy C in the first place and therefore make upgrade offers not too cheap all the time ;)

NUE-CDG, Y --> C, 239 EUR or 59.000 miles :)

:rolleyes: unbelievable !

Reading the latest posts - there are offers in a range from fair/reasonable all the way up to completely nuts/insane.
They might be in the process of piloting a new software tool, featuring new advanced algorithms, random generators and revolutionary capabilities like artificial stupidity.

CDG-CPH : 89 EUR
CPH-CDG : 99 EUR

not too bad compared to other offers recently posted.

Indeed!
What was the original fare?

H fare.

Not a cheap one then. Still, the 89/99 might have been tempting.

What's the deal when taking an upgrade offer from Y to Premium Eco at OLCI: does that also increase the luggage allowance?

Very curious to know, as I have an upcoming itinerary where it may be cheaper to pay for upgrades (if offered at the usual rate) than pay 200+ for each extra bag.

It doesn't.

CDG-HAM in M class, upgrade offer for 139 EUR or... 35000 miles!!!, of course not taken!