Travel agents used to have to do most of the footwork for
Search flights from nearby airports. This is a very simple and effective trick to find cheap flights. Sometimes flights from local airport to your destination can be quite expensive while, on the contrary, flights from nearby airports can be really cheap. For example, international flights from Seattle are quite cheap when compared to international flights from Vancouver and the distance between the two cities is only 234 km (about a two and half hour drive). So driving or taking a bus to the nearby airport is sometimes a good way to get to your destination cheaply.
While many theories exist around booking specifically on a Tuesday to save money, the reality is there is no consistent truth to exactly which days are cheapest to fly. Most of the time it is cheaper to leave on a weekday, though this isn't always the case. Your best strategy is to get a quick visual of prices for a whole month to see what days are cheapest for your specific route. Here's how: