Frequent flyer miles are typically earned directly through the airline's loyalty program, which means that the eligibility for earning such miles usually depends on specific factors, including the booking process. When booking flights through third-party services like Onthefly.com, it is essential to check if the airline's policies allow for mileage accumulation through such platforms. In many cases, airlines do permit frequent flyer miles to be earned on tickets purchased through travel websites, but this is not universally applicable to all airlines or ticket types.
It is advisable for travelers to enter their frequent flyer number at the time of booking to ensure that their account is credited appropriately. Onthefly.com may provide information on various booking options, so reviewing the details on their current web page could be beneficial. Additionally, travelers should familiarize themselves with the rules set by their respective airlines regarding ticket purchases and frequent flyer mile eligibility. Each airline has different policies, and being informed can help maximize the benefits of loyalty programs.