I am a US citizen. I will arrive from LHR on BA at 11:15am. I will need to transfer to an Alaska Airlines/Horizon Air flight 2163 at 1:30pm, heading to PDX. I am trying to book the Alaska Airlines flight on the same ticket at the BA flight but it may end up being two separate tickets. Presumably in either case I will need to clear customs, get my bags and recheck my bags and then go to board the flight. Is 2 hours 15 minutes enough time? Do you know where I will arrive on flight BA 53, and where will I need to go in the airport to retrieve and recheck the bags and then to go board Alaska/Horizon flight 2163? I did something similar many years ago but can't remember the details and am not sure what has changed.