This is what I have from your intro:
A cheap air travel is becoming more popular than ever before. For some people, the cheap price experiences short-term safeties. For some others, this raises an opportunity to travel an to get more experience. Both these views have their own merits and demerits. However, I believe on a cheap air travel would have the best quality in contrast to having the worse quality.
To support the main idea, you should give one example. This can be taken from your personal experience.
According to my own experiences
This is used when saying what people, organizations, and reports, not your words.
When giving your opinion about something, use this: I think that/ in my opinion...