Horses traveling internationally to participate in events such as Royal Ascot do experience jet lag, though to a lesser degree than humans, according to research conducted by the University of Kentucky. While humans generally need about a day to adjust for every hour of time difference crossed, horses recover more quickly. For instance, a horse experiencing a six-hour time shift may see its melatonin levels stabilize within 24 hours, and its core body temperature return to normal within approximately three days.
One factor contributing to this rapid adjustment is the difference in sleep patterns between horses and humans. Horses sleep in short bursts and often remain standing while resting, allowing them to maintain natural sleep cycles even during air travel. This capacity to rest while standing facilitates a smoother transition across time zones and less overall exhaustion upon arrival.
The ability of horses to quickly recover from time changes supports the viability of air transportation for international equestrian competitions such as Royal Ascot, the Badminton Horse Trials, and the Olympic Games. This has led to a substantial equine air travel industry. Before departure, horses must carry a valid equine passport and health certificates verifying up-to-date vaccinations. They are also subject to veterinary checks prior to leaving and upon arrival. Additionally, quarantine periods may be required either before travel, after arrival, or both, depending on regulations.
During transportation, horses are secured within specialized jet stalls aboard cargo planes, which typically have minimal space for human passengers. Highly trained flying grooms and sometimes veterinarians accompany the horses to provide continuous care throughout the flight. Their responsibilities include feeding the horses hay, ensuring access to water, monitoring for signs of overheating within the metal stalls, and keeping the animals calm to prevent stress.
The interior of these cargo planes is climate-controlled to provide a stable environment suited to the horses’ needs. The logistics and care associated with this mode of travel have enhanced the comfort and safety of equine air transport, making long-distance competition participation feasible for horses. Reflecting the professionalism and pride within this sector, one American transportation company has branded its aircraft "Air Horse One," highlighting its commitment to high standards in equine travel.
Overall, advances in understanding equine physiology and improvements in travel conditions have made international air transport a key component in the global horse racing and equestrian industry, enabling horses to compete worldwide with manageable impacts from long-distance travel.