Originally Posted by AutoSlash

Sure, you can book a Blue Flex fare which allows for refundability, but keep in mind that Blue Flex is usually 25-50% higher than a standard fare, so while you can cancel and re-book if/when the price drops, there's no guarantee that you'll end up at a price that was lower than if you booked a regular "Blue" fare in the first place. if your plans aren't firm though, it's probably a decent approach.