United credit cards: Up to 150,000 bonus miles msn.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from msn.com Daily Mail and Mail on Sunday newspapers.
If you're looking to quickly boost your balance of frequent flyer miles, the new United Quest card is offering up to 100,000 bonus miles, and several other United credit cards have increased sign-up bonuses as well.