We are used to dividing airline classes into regular class, which is Economy, and premium class, which is Business.

This will always be the cheapest class, offering standard seating and limited meal service largely depending on flight length.

If you fly with a low-cost airline, passengers will often have to pay separately when ordering food or drinks.

Additionally, on long-haul flights, some airlines also provide simple amenity kits (e.g. toothbrush, towel, etc.) even in economy class.

If you want more space on the plane, premium economy is more suitable.

According to Knaviation, the service of premium economy class is largely similar to that of economy class, but with significantly larger seats.

Business class seats are located in a private area at the top of the plane and are much larger than economy class seats.

Food served to business class is always diverse, varied and more premium.

With a business class ticket, you can also save time by waiting in the priority check-in line and your luggage will also receive a `priority pass` for early pick-up.

Waiting for business flights is also more comfortable than most economy and premium economy passengers because they are in private lounges.

First class is the most luxurious, luxurious, and expensive airline class you can experience on an airplane.

First class seats are similar to business class, but some airlines such as Singapore Airlines and Emirates offer large private suites with seats that can be opened up to resemble small beds.

On long-haul aircraft, it is not uncommon to have 30 or 40 business class seats.

First class ground service is the same as business class passengers.

Source: Knaviation