Buying points and miles pays off when it closes a small gap to an award you've already found, and the total costs less than the cash price of the same trip. Buying them on spec, with no trip in mind, rarely does.
That test is simple, but it's easy to skip when a sale shows a big bonus. Here's how to run it.
When Buying Points Makes Sense
The clearest case is a top-up. You've found the flight or hotel night you want, you're a little short of the points it costs, and a purchase fills the gap. Buying only what you're missing keeps the bill small and the points useful the moment they land.
A promotion can help, because a bonus lowers what each point costs you. A bonus is a discount on something you have to use, though. If you had no award in mind, a discount on points you won't spend is still money spent.
Do the Math First
Compare two totals for the same trip: what the purchase costs you plus the taxes and fees on the award, against the cash price.
Say an award flight costs 100,000 points and you hold 80,000. The missing 20,000 would cost $400 on sale, and the cash fare for the same seat is $2,000. You'd pay $400 plus the award's taxes and fees instead of $2,000, which is a clear win. If the same 20,000 points cost $400 and the cash fare were $450, you'd be paying for points to avoid a fare that cheap. Those numbers are made up to show the method, so use the real prices for your trip.
Also count the 80,000 points you already hold. They could buy something else, so ask whether this award is the best use of them.
Know the Program's Rules
Each program sets its own price per point, annual purchase limit and fine print, so read its buy page before you commit. JetBlue's help page, for one, says the points a flight costs are based on the published base fare at the time of booking, and that purchased, gifted or transferred points can be used for awards but don't earn tiles. In a program like that, you can price the same flight in cash and in points before you buy.
Search for the seat or room first, then buy. Points you can't spend on the trip you wanted are a poor trade.
Pay With a Card You Clear in Full
Cards are the slower way to build a balance, since everyday spending earns points as you go. Buying is the quick top-up. If you pay for a purchase with a credit card, pay the balance in full. Interest can erase whatever you saved on the points.
For worked examples with real programs, see our guide to buying JetBlue points and our guide to buying United miles. To check whether a current sale beats the usual price, start with how to judge a points and miles sale.
Updated October 17, 2026: buying points.
