Rare pricing errors surface and vanish fast. Move quickly, book refundable.
Mistake fares are rare, glorious pricing errors that surface without warning and vanish just as fast. A business class seat for the price of economy, a long haul for pocket change: they are real, and they reward the people who move first.
When one appears, book it fast and book it refundable if you can, then wait before making any non refundable plans around it. Airlines sometimes honor these fares and sometimes cancel them, so treat the ticket as a maybe until it clears.
Keep the planner open so you can sanity check the routing and total the trip the moment a fare like this lands.
