Travellers who fly the most and pay the most will soon earn more miles on United Airlines' frequent-flier programme. The change will help elite members of United's loyalty programme those who fly at least 25,000 miles a year on the airline. It will be far less-rewarding for people who currently rack up miles by taking occasional long flights at bargain fares.Starting next March 1, elite-level members of MileagePlus will earn between 7 and 11 miles for every dollar they spend on tickets, not counting taxes. Regular members people who fly less than 25,000 miles and spend less than 2,500 US dollar a year on United will get 5 miles per dollar toward free travel.United joins Delta, Southwest and JetBlue in basing awards on money spent, not miles flown. Since 1981, when American Airlines started the first big loyalty programme in the airline industry, fliers were rewardedfor the number of miles they flew regardless of how much they paid for their ticket.