Sales and Consulting are very wide areas to consider. You should consider what you enjoy. An example if you are extraverted, enjoy people and have great listening skill then maybe a sales role is an option. If you enjoy technology and people then may technology consulting (helping customers install and use software) would be a great option. If you like math and numbers then maybe an auditor for one of the larger consulting companies mentioned in previous posts is a good option.
I did a quick Google and the link below are the companies from 2019 that had the most spend with airlines. That should give you a good indication of the type of companies that have employees traveling. A lot of these are technology and consulting companies, you may want to think about careers in those fields.