The transport is absolutely no problem. I once bought discus at an auction in Atlanta and took them on my flight back home to NY. If packaged properly (one per bag for adults), they can easily survive 36 hours.
A note of caution. IMO
cross contamination of disease between tanks can occur quite easily at a discus auction. The more breeders and the more importers that attend, the higher the likelihood of that. I've had a bout of discus plague happen from just such an auction.