A small dog under the seat is a different product from a crate in the hold. WestJet sells both, with tight kennel sizes, a 48-hour reservation cut-off, and destination bans that surprise people bound for London or Barbados. Book the pet as soon as the human ticket exists; a paid seat does not reserve an animal space. WestJet Airlines Pet Travel Policies cover cats and dogs in the cabin and a wider list (including birds, rabbits and some small mammals) as checked baggage on mo