2) Find a Single Program which Covers Multiple Airlines
Some individuals overlook the fact that different airlines can belong to a single parent company or airline affiliate program. For instance, Lufthansa, Chicago and United are all part of Star Alliance, and each airline services a vast number of cities in both the United States and around the world. If you sign up for a reward program for one of these airlines, you may be able to earn rewards with all of their partners. This is an easy way to enjoy multiple airlines while keeping all of your earned miles on a single account. Over the years, airline companies have changed and some that used to be an independent carrier may now part of an umbrella under a major carrier, or have combined as an partnership or alliance. If you have a particular airline that you are fond of, contact them to see if there are partners or affiliates that may not be obvious unless you ask.