prices from many different companies that offer the flight
Airline rewards programs are a great way to get free flights, free upgrades, and free companion tickets. No matter how often you fly, you should be signed up for the airline’s reward program. I stick to US-based airlines since they are involved in all the major alliances and you can earn miles on their partner flights. For example, if I fly Singapore Airlines, I can earn United Airlines miles because they are partners. Likewise, if I fly Air France, it’s credited to my Delta rewards account.
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: