The question of whether domestic flights allow drunk passengers isn't a simple yes or no. While airlines don't have a specific policy banning intoxicated passengers, they do reserve the right to refuse boarding to anyone they deem a potential risk to the safety or comfort of others. So, if you're visibly intoxicated, causing a scene, or seem likely to become disruptive, you might not be allowed on your flight. It's also worth noting that excessive drinking can exacerbate health issues related to air travel. So, for the sake of everyone's comfort and safety, it might be best to save the celebrations for after the flight.