Lately I've found it difficult to get much more than 1 cent per point of value out of airline miles for domestic air travel. (milenomics.com)
Perhaps most important: After years of mergers and consolidation, customers don't have as many options as they used to for domestic air travel. (fortune.com)
There is an extensive network of domestic air services, which is useful for longer journeys, with fares on a par with rail services. (wanderlust.co.uk)