 reported some 550 flight delays and 80 cancellations. U.S. Postal Service is raising the price of forever stamps later this month. Stamps will sell for 73 cents beginning July 14th. That's up a nickel from now. Other postage costs are going up as well, including postcard and metered letter rates. Increases are part of a decade-long financial outline that the Postal Service is calling the Delivering for America Plan.