Cardboard boxes (for anything other than a bicycle or other sporting equipment) are widely seen by airlines as an unsuitable form of packing. You may be able to

Cardboard boxes (for anything other than a bicycle or other sporting equipment) are widely seen by airlines as an unsuitable form of packing. You may be able to check a cardboard box in only by signing a liability waiver. I fly with my bicycle at least four times a year, and about half the time my cardboard box has been gashed open by the time I collect it at the destination. Everything inside the bike box has to be tied together so that nothing falls out. I definitely wouldn’t trust a cardboard box for ordinary luggage.