2017.11 Updated: Added Chase IHG back because a working 80k+5k+$50 link is found, added AmEx Hilton Surpass back because of new bonus, and added Capital One Venture because of new bonus. Credit Card sign-up bonuses may be the best way to get a great amount of miles / points in a short period. Some credit cards even offer sign-up bonuses...
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By physixfan