@c92f5433 Take the train to Brussels, board the plane there.
@7f60fbe4 you aren't a big traveler, are you? Get on a train in Amsterdam with your luggage, arrive in Brussels with your luggage, haste through the railway-station onto a commuter train to Zaventem and get out there, schlepp your luggage into BRU and finally start your check-in OR you can check-in at Schipol (AMS) and lean back. That's also the only reason why you can fly from Hannover to Frankfurt. Nobody wants to do that - except if there's a connecting flight from FRA