Most major airlines offer frequent flier programs which are free to acquire and fun to use. Whether you fly regularly for business or once in a blue moon for pleasure you can earn miles when you fly. Next time you book your flight make sure to enter your frequent flier number so you can start earning miles toward your next escape.
The best way to earn your free trip is to fly on the same airline as much as possible. With every flight you will be earning miles and if the majority of your flying is done with the same carrier, the miles will be accumulating in one place instead of being spread out over several different airlines.
Make sure you check the expiration dates on your miles. Some miles will expire if they are not used by within a certain time of their being acquired. If it looks like you might lose some of your miles you can gift them to a loved one or book a last minute get away. Loosing those miles because they expire is like losing out on free money that you’ve earned, no one wants to see that happen.
Lastly, look at blackout dates. Some airlines have stricter blackout dates than others. Sometimes these dates are hard to find but should be posted in the fine print either on the miles redemption website or in printed literature sent in the mail when you signed up. If at all possible fly with the airline that will give you the most flexibility in when you cash in your miles.