Many (gosh, almost 40) years of flying LHR to California, the westbound is invariably further north than the eastbound. But there are all sorts of oddballs. Even with this experience, I was most surprised on a LHR-Vancouver flight to overfly Edinburgh on the way up. Likewise an LAX back to London which routed over Bangor ME.
LHR to Miami has been the same. Outward via Lands End and overhead Bermuda had followed, by a few months, another westbound way to the north, over Newfoundland and overhead New York City. This latter was on a 767 which may have been downgraded from ETOPS. We still managed an on time arrival.