If you have a flight operated by LAN, check its Traveling with Pets Information.
Tranquilizing medications are not recommended for animals on flights (with some exceptions), as there is the possibility of side effects such as excessive thirst, muscular relaxation or even excitation and paradoxical anxiety. Responsibility for any problems arising from an animal’s use of medications during air travel lies with the owner.
Tips for the Trip
Some actions are important before and during the flight. Prior to the flight, give your dog a bath and trim its nails; for cats, do not bathe, and only trim its claws if they are very long. Serve light foods to the animal on the day of the flight. The last meal should be taken up to 2 (two) hours prior to the flight. Serve water freely up to boarding time. Walk your dog and encourage it to urinate/defecate. Encourage cats to urinate/defecate, but do not force it. Play with and pet your animal. Do not board too early unless your pet is not calm in the airport environment.
Tips for Arrivals
On arrival and the day after the flight, certain actions are important. Serve light foods to the animal and give it plenty of water. Walk your dog on leaving the Arrivals area, encouraging it to urinate/defecate. Go straight to your final destination without stopping. Observe the animal’s behavior following the flight - it is possible that, even at home, it may be agitated or apathetic. If your pet does not return to its normal state, consult a veterinary physician.