love my nespresso at home and my gaggia is gathering dust under the stairs but I think you're certifiable to carry it with you everywhere!!

Have you thought about one of these Handpresso machines? Either the one you fill with hot water or they do a rather nifty one that works off 12v in the car. With the hot water one, presumably you could ask the cabin crew on a plane for a cup of hot water or ask them to fill it directly in the galley?