The seats are very very tight. I weigh 185 lbs and am 6 foot. It is very uncomfortable. With respect I cannot imagine sitting there at 300 lbs. I hope this helps.
Thank you for contacting the airport. Your question should be directed to the airline, Allegiant directly. They can be found at www.allegiant.com or by phone 702-505-8888. A link below might help: https://www.allegiantair.com/passengers-special-needs
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