Federal Guidelines FAQ's:

Pets in the Passenger Cabin

Can I be sure that there will be no animals on my flight if an airline does not allow pets in the cabin?
No, you can't be sure. The Department of Transportation (DOT) has rules (14 CFR part 382)(PDF) that require airlines to allow passengers to fly with their service animals in the cabin on all U.S. airlines. Service animals are not pets. They are working animals that assist persons with disabilities. There is no limit to the number of service animals that can be on any flight. Service animals do not need any health certificates to travel and they do not need to be confined in a container or cage.

How do I find out if an airline allows pets to travel in the passenger cabin and what their policies and procedures are?
You can find out what the specific policies and procedures are for each airline in several ways. You can call the airline's reservations line and get information from the agent who takes your call. You can also look at an airline's website to get information about their policies for traveling with pets.

I have severe allergies to pet dander. How can I be sure that there is no pet dander on my flight?
You will still be exposed to pet dander on every flight, even without any pets in the passenger cabin. This is because most allergens are carried into the cabin on the clothes of other passengers.

Then what should I do if I am allergic to pet dander, but I need to fly?
First, you can reduce the chance that there will be an animal in the cabin on your flight. You can fly on an airline that does not allow pets in the cabin. You can also ask the reservations agent for your airline if another passenger on the same flight has made reservations to travel with a pet. You should also check with your allergist or doctor before your trip to discuss travel related risks and ask if you should carry medications with you. If a reaction should occur during the flight, follow your doctor's treatment instructions and ask a flight attendant for assistance.