While cost-conscious passengers traveling on Plus Ultra's economy fares were restricted to a pair of carry-on bags beneath the seat, those choosing roomier accommodations in the business-class cabin gained a third item to stow onboard. Uniform guidelines circumscribed each piece at under five feet in its summed length and girth. Nevertheless, the allowances for checked baggage below vary according to ticket class and itinerary. For enlightenment on binding specifications tailored to one's individual journey, travelers can scrutinize the airlines' patiently explained webpages or pose their queries directly to the customer representatives standing by to help.