DOT filings include the amount each airline spends per passenger on meals.
We can see United, Delta, and American spending more on food than Virgin America and JetBlue. That just tells us that Virgin America operates shorter flights that the nation’s 3 biggest airlines. JetBlue is only extensive serving meals to premium cabin customers on their limited set of “Mint” routes. Blue potato chips aren’t very expensive.
More interesting is the comparison over time…