It may be best to compare OKC and TUL air service to its peers such as OMA (Omaha - Eppley Field) ( RIC - Richmond International) and SDF (Louisville/Muhammad Ali International) to assess if the service level for the state two largest airports are better, equal or less than comparable metros. Just based off of these three metros, which are very similar in metro population, OKC and TUL have some definite gaps in service to be comparable with these peers that are reported.