Fireworks.org – The World’s Fireworks Community › Forums › Transportation › Is it cheaper to ship fireworks by sea or by air from China? › Reply To: Is it cheaper to ship fireworks by sea or by air from China?
Good breakdown here. One thing I’ll add – air freight for hazmat (div 1.4G) is possible but the paperwork is different from sea. You need an IATA-compliant shipper’s declaration and a lot of forwarders just don’t bother with it.
If you’re new to importing, there’s some useful info in the Fireworks Guide about what documentation you’ll need on the US side: https://fireworks.org/category/fireworks-guide/