Allegiant Air (IATA code G4), a US-based low cost airline.
Allegiant Air (IATA code: G4) is, with spirit-airlines and frontier-airlines, one of three ultra-low-cost-carriers based in the usa.
It primarily operates leisure routes from secondary airports— sometimes, as the only scheduled airline— and travelers should check their itineraries carefully. For example, Allegiant flies between Charlotte/Concord Regional Airport (IATA code: USA) and Orlando Sanford International Airport (sfb) and not the much larger and better-known Charlotte International (clt) or Orlando International (mco).
Allegiant has focus cities at