This means if the price drops on a flight you already booked you can «change» it for free to the exact same flights and get a refund of the difference! (awardbookingservice.com)
Direct flights may have a stop, but same flight number continues to destination. (creditdonkey.com)
What if I told you that sometimes the business - class seat is cheaper than the economy seat on the very same flight? (creditcards.com)