Snagging a mistake fare can feel like hitting the jackpot. Also known as “error” or “glitch” fares, these unintentionally low-cost flights are rare — but substantial, with discounts of up to 90% off ...

Cheap airfare is only a bargain if the price you see is close to what you actually pay. That idea has shaped airline shopping for more than a decade, but a new Trump administration proposal could ...