This is a composite, illustrative scenario, not a specific traveler's story, laid out because it's the single most common misunderstanding we hear about ESA letters. The situation: A traveler books a flight assuming their ESA letter guarantees their cat or dog flies in the cabin at no extra charge, the way it commonly worked several years ago. In January 2021, the U.S. Department of Transportation changed the Air Carrier Access Act (ACAA) rule so airlines are no longer required to treat emotional support animals as service animals. Airlines were given the choice to reclassify ESAs as ordinary pets for travel purposes, and most major U.S. carriers did exactly that. Only trained psychiatric service dogs (PSDs) retain ADA-style protections in air travel, and even then, airlines can require specific DOT paperwork. The typical outcome now: an ESA letter remains fully valid and useful for its original purpose, housing, but it does not obligate an airline to waive pet fees or cabin-pet size restrictions. Some airlines still make informal accommodations, which is why checking your specific airline's current policy before booking matters. What this means practically: we say this plainly on our air travel page and in the FAQ rather than let anyone book expecting a guarantee the letter can't deliver. A company that oversells what its own product does undermines the one use case (housing) where the letter's legal weight is real.
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