If you’re booking an upcoming flight and you want to save money, your first thought is probably “I wonder if I have enough miles.” Then you sign into your frequent flyer account only to see the balance is just a few thousand miles short for that ideal flight.

“Guess I’ll pay cash and save my miles for the next flight,” right? Well, you might not have to wait. Because airline miles and credit card points lose value frequently and award space can disappear quickly, it is better to spend your miles sooner, rather than later.

So what do you do if you just need a top-off?

Here are some of your options to get airline miles fast so that you don’t have to wait months or years to book an award flight.

How to get more airline miles quickly

Transfer your credit card points to the airline

The best option to get more airline miles is to transfer credit card rewards that you’ve already earned from flexible points programs to the airline loyalty program.

Credit cards with transferable rewards points — like Chase Ultimate Rewards®, AmEx Membership Rewards, Capital One Miles or Citi ThankYou points — can be a great resource for a miles top-up. Cross check which cards are in your wallet with your airline of choice to see if the two businesses are transfer partners.