Luanne in one scene tells Hank a man asked if she would like to join the mile high club and when she tells him she is facing Hank. In the next shot she is standing in the same position but has turned around and is facing away. There was not enough time for her to move between shots.
It was established in the previous episode that Bill is the last surviving male Dauterive (besides Gilbert-who is his cousin), so, while he may not be the brightest bulb, it doesn't make sense for him to try and convince the Hills he had an uncle.
Tagline: (sniffs) "I hate Thanksgiving!" -Bill
In the scene where Hank is talking to Peggy's mom at the airport with the pay-phone, at the beginning of the scene the sign above the pay-phones says "Telephones" but at the end of the scene it says "Telephone".
When Hank and Luanne are looking at the flights being delayed one by one on the video screen Albuquerque is mispelled as Albequerque.
At the airport they say that there are flights leaving Love Field for Montana. This is impossible due to the Wright Amendment. Only flights going to one of the 5 bordering states are allowed to fly out of Love Field. Since Montana doesn't border Texas - no flights would be leaving for there from Love Field Airport.
Bobby: Dad, I know you said to try, but I can't eat this. It's salad!
Peggy: Hank, the boy needs protein or he'll pass out. Now break open that box! Thanksgiving will go on with a one-legged turkey.
Hank: One-legged turkey? I'm not even gonna dignify that with a response. Other than "Shame on you."
Hank: We're not animals. We'll wait in line like everybody else.
Peggy: Hank, the ability to cut ahead in line is what separates us from the animals!
Dale: Hey, do your people even celebrate Thanksgiving?
John Redcorn: We did. Once.
(Dale is finally rescued after he was locked out of the airport when he left to have a cigarette)
Dale: The only thing that kept me going was my will to smoke again! And the ashtrays from an Air Italia flight.
Luanne: Uncle Hank, some guy just asked me if I want to join the Mile High Club. Can you get me an application?
Peggy: Hank Rutherford Hill, is your middlename 'Naive'?
Even though it's animated, the interiors, exteriors, layouts and signage are remarkably similar to that of the real DFW airport.
Peggy's line, "the day before Thanksgiving is, in my opinion, one of the busiest travel days of the year" is an allusion to the episode "Nine Pretty Darn Angry Men" where Peggy says "the day after Thanksgiving is, in my opinion, the busiest shopping day of the year". Both of these are obviously more than just her opinion.