After many hours online, searching for reasonably-priced flights that (1) either didn't include Lufthansa and its obscene bike fees (or were significantly cheaper to negate the effect), and (2) didn't include ridiculously long or stupidly short connections, prices dropped this week and I've purchased return flights to Bilbao.

Yeah, I know the original plan was Biarritz, but this way we will arrive in a place we want to spend a day or two anyway and ride the Atlantic coast between Biarritz (if we even go there) and Bilbao when it's beach season.  Maybe not beach season to Europeans, but mid-June should be warm enough for Canadians.  If not warm enough to swim, the scenery will still be fantastic.  Now to book accommodation!  And then I'll shovel snow.