The time of year that you travel also affects whether your pet can travel with you. For example, Airbus A320 aircraft often have winter restrictions because the cargo hold can hover around the freezing mark temperature wise. If you have a pet that is comfortable in such temperatures, the airline may consider transporting your pet if you sign a waiver, releasing the airline of any responsibility. This is a rather frightening prospect to most pet owners, so again, contact the airline and make sure that there are no such restrictions on the aircraft type on which you will be flying.
Traveling internationally can prove to be cruel for your pet if the country you are going to imposes a quarantine. It is important to note that a number of countries have quarantines for pets. Australia is known for this because as an island nation, it has been able to remain free of rabies and a number of other illnesses and diseases. It is therefore a good idea to call the consulate or embassy of the country you are traveling to if you are taking your pets for travel with you internationally. The United Kingdom, for example, keeps pets in quarantine for six months depending on where you are arriving from. For countries where there is no such quarantine, make sure that the veterinarian provides you with documentation that demonstrates your pet is in good health.
So now that all the background work is done, think of what will make your pet comfortable. A familiar blanket or play toy will help, as will lining the bottom of the kennel just in case the experience of travel causes unexpected accidents. Food and water for longer flights is a must, and if you have connecting flights, do ask an airline representative (particularly one at a connecting baggage or transfer baggage area) whether your pet has made the connection as well. There is no worse feeling for a pet owner to discover that your pet has misconnected and the next flight is not for hours or days later!
Upon arrival, proceed to the baggage claim area, where there will usually be a separate area for fragile and oversized items. If not, inquire with the airline representative as to where they will be bringing your pet.
And now brave traveler, bring your pet (if you must, or really want to!) to share in the travel experience with you!

