Once upon a time, this question was relatively simple to answer. Airlines set prices for given routes in a particular cabin that didn't change, regardless of when you booked your ticket. Today, however, nearly all airlines use dynamic pricing—that is, they rely on complex algorithms to set fares that fluctuate.

Yes, airlines are the pioneers of dynamic pricing, and by 2026, the system has become more sophisticated with the integration of Artificial Intelligence (AI). Rather than having a fixed price for a seat, airlines use algorithms that adjust fares in real-time based on hundreds of variables including current demand, remaining seat inventory, competitor pricing, and even the time of day you are searching. This is often referred to as "Yield Management." For example, if a flight to London is selling faster than historical data predicts, the algorithm will automatically "close" cheaper fare buckets and open more expensive ones. In 2026, airlines have moved beyond simple "fare buckets" to Continuous Pricing, which allows them to offer thousands of different price points rather than just a few fixed tiers. This ensures the airline extracts the maximum "willingness to pay" from every customer. This is why you might see a price increase just minutes after your first search—the system detects "high intent" and adjusts the offer accordingly to maximize profit for that specific flight.