Travelling Internationally with a Cavalier King Charles Spaniel
Cavalier King Charles Spaniels are one of Britain’s most beloved breeds – gentle, sociable, and well-suited to family life. For international relocation, they occupy a grey zone: partially brachycephalic (which creates airline complications), but less severely so than Bulldogs or Pugs. The bigger health concern for most CKCSs travelling internationally is cardiac, not respiratory.
Brachycephalic Status: Partially Restricted
CKCSs have shorter muzzles than non-brachycephalic breeds, but they are not as compressed as English Bulldogs or French Bulldogs. This means:
- Some airlines list them on restricted breed lists (check each airline individually)
- Others accept them without special restriction
- The risk profile during travel is real but manageable for most CKCSs
Before booking, contact the airline directly and ask specifically about Cavalier King Charles Spaniels. Get the answer in writing.
Heart Health: The Greater Concern
Mitral valve disease (MVD) is extremely common in the breed – studies suggest the majority of CKCSs will develop some degree of MVD by age 10. For travel purposes:
- Have your vet assess heart function with a stethoscope before any international flight
- Echocardiography is ideal if your dog is middle-aged or older
- A vet fitness-to-fly letter is strongly recommended, specifically referencing cardiac status
- Avoid travel in extreme heat with a cardiac CKCS
Syringomyelia (SM) / Chiari-like malformation is also common. SM-affected dogs may find pressure changes uncomfortable. Discuss this with your vet before booking.
Cabin vs Hold
CKCSs typically weigh 5 to 8 kg as adults. Many fall within cabin weight limits (5 to 8 kg including carrier, depending on the airline). In-cabin travel is preferable for a brachycephalic dog with any cardiac history. The temperature is more stable and you can monitor your dog throughout the flight.
For larger or heavier Cavaliers, the hold is the option. Choose an airline with a good live animal cargo reputation, avoid summer travel if possible, and crate train thoroughly before travel.
Crate Training for a CKCS
CKCSs are adaptable and bond strongly with their owners. The separation of hold travel can cause anxiety. Crate training months before travel – making the crate a genuinely comfortable, positive space – makes a significant difference to how they handle the journey.
International Route Planning
No country bans CKCSs. Your route planning focuses on:
- Which airlines on your specific route accept the breed
- Health fitness before travel (especially cardiac)
- Choosing cooler travel times where possible
Check airline policies directly and get vet clearance before travel. Information current as of May 2026.