Canadians vented their frustration against airlines on social media last week after prices of commercial flights out of Yellowknife soared up to 10-fold above normal just as residents were ordered to evacuate due to raging wildfires. Carriers including Air Canada have pledged to cap prices on Yellowknife flights as most of its roughly 20,000 residents evacuated due to a large approaching blaze. But that can take time, analysts say, since airlines must manually override automated systems that raise fares in the case of higher demand. Here is a look at how airlines deal with a sudden surge in demand on a particular route.   Disasters versus high demand Airline...Keep on reading: Explainer: How airlines cope with price surge during disasters