Join Date: May 2012
Location: Munich, Algarve, Sussex or S.F Bay Area
Programs: Mucci, BA Gold, A3*Gold, LH SEN, HH Gold, Marriott Plat, IHG Plat Amb
Posts: 5,604
The "operated by xxx for yyy" is normally the sign of a wet lease arrangement. Just as I got full BA tier points for my LHR-FAO "operated by Finnair for British Airways", I would expect tier points for AY HEL-LIS "operated by DAT for Finnair" to accumulate Avios and Tier Points as a normal AY flight.
We will see, as I am also flying LIS-HEL in September.