Travel search engine Rome2Rio reports that the best per-mile rates are not always on the Ryanairs and Spirits of the world, and research by The Telegraph (UK) backs that up on many routes.
Obviously, many factors affect the pricing, including short vs long-haul and more, but the word is: don't just check the cheapies...have a look at the rest.
Overall, Ryanair ranked #11, way ahead of main competitor #22 Easyjet. The chart and discussion can be seen HERE
Photo: Singapore's Scoot Airlines had the overall lowest cost in survey.