UPS, Fed-Ex, or USPS – Generally for Smaller Packages going within the US or Internationally.
LTL – Less than Truckload. 5-7 days typically By Land
Ocean – Ocean freight can be a cost effective method but does take more transit time than going by Air. 30 day is an average time frame. If some parts are prone to corrosion from salt Air you may want to opt for Air Freight. If not in any hurry this can be a good option. Packages are Insured.
Air Freight – Heavy weight packages like engines and Transmissions that have a typical transit time of 5-7 days.