In the world of travel hacking, there is one universal rule: . Miles are not an investment; they are a currency that airlines can (and do) devalue at any time without notice. If you buy 100,000 miles today with no plan, you might find that the 80,000-mile flight you wanted suddenly costs 120,000 miles tomorrow. When It’s Actually Worth It
Points from American Express or Chase can be moved to dozens of different airlines instantly, giving you more flexibility than being locked into one carrier. buying miles worth it
Again, miles are not a savings account. Unless you are booking within the next few weeks, let the offer pass. In the world of travel hacking, there is one universal rule:
There are only a few specific scenarios where buying miles makes financial sense: When It’s Actually Worth It Points from American
This is the most common "win." If you need 60,000 miles for a flight but only have 57,000, buying those last 3,000 miles is often worth it to secure the booking.
It is almost never worth buying miles for a standard domestic coach seat. The cash price for these flights is usually low enough that the miles you’d buy would cost more than the ticket itself.