Trying to book FRA-HEL-ARN on AY using Avios. I realize AY doesn't make for the most efficient routing here, but I have a well-stocked avios account and I've never flown with Finnair, so I'd like to try this.
When searching for this routing on BA.com, I get a message
"British Airways and its partners do not fly this route. Please consider alternative destinations or
contact your executive club service centre "
What's going on? I googled before posting here and HFP says that you can do the usual avios booking for AY flights online on BA.com, no problem