Boston, NYC, Kuala Lumpur, Nairobi & Tel Aviv are all places I've managed to use a 241 in First without too much trouble. The Reward Flight Finder on the BA App is pretty useful (by BA IT standards). Note that there is no guarantee of seats like the 4Y & 2J so often they won't appear at T-355 so you need to keep checking regularly if you have specific locations/dates in mind