The Mississippi River is known as the Middle Mississippi from the Upper Mississippi River's confluence with the Missouri River at St. Louis, Missouri, for 190 miles (310 km) to its confluence with the Ohio River at Cairo, Illinois. The Middle Mississippi is relatively free-flowing.
As Hopper notes, eight major U.S. airlines offer free cancellation for tickets purchased at least seven days in advance: Delta, United, US Airways, JetBlue, Southwest, Spirit, Frontier and American (in American 's case, you'll hold your ticket instead of purchasing it).
What happens if your flight is cancelled. In the unfortunate event that your flight is cancelled you can transfer to another easyJet flight for free or if youâd prefer you can get a full refund. You can do this quickly and easily in three ways online: simply log onto EasyJet.com/ (insert your flight number).