Prices and true cost
How fresh a price is, why it can move before you reach the airline, and what is counted in the figure you are shown.
Where do the prices come from?
Live flight searches, the same prices a booking site would show you, cached for a few hours so the same question does not cost a search twice.
The alert said one price and the airline says another. Why?
Fares move by the minute, seats sell out of a fare bucket, and the extras you pick at checkout are yours to choose. Here is how to tell which one happened.
Is the price I see the price I pay?
The figure Fare Sniper ranks on includes the fare, the bag, the seat and the ground transport to a further airport, because a 20 euro flight that costs 100 euro is not a 20 euro flight.