Originally Posted by
larsll
I was in a conference BOG last week, and with few European airlines flying there (AF and IB) very many of my friends flew with DL and CO via the US. And one thing they all swore; never ever do a transfer in the US again...

There are for sure more options to fly with European airlines to BOS than just AF and IB. You could also fly with BA, Virgin, Icelandair... You could even fly nonstop ARN-BOS with Finnair if you don't mind flying in their all-economy 757.