The discount airlines Southwest, Spirit, Air Tran, and Jet Blue, do their fares on a one way basis. The major airlines AA, United, Delta, US Air, Continental base theirs on roundtrip. In most cases a roundtrip ticket is cheaper than one way with the major airlines. However; it pays to check it both ways. It also pays to compare anything you find with what the cruise line is asking for their airfare. Often in peak holiday times the cruise lines air can be comparable and provides a little security of getting to the ship. We always recommend flying in a day prior to the cruise.
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