MBA Scope

The field you have chosen is quite nice and has a good career and scope. In fact as you have already done marketing it is easy to understand and has a more job opportunity.
You can also check out some of these courses in which you can do MBA with a good career graph:
1 .Masters in International Business
2. Masters in Hospitality Management
3. Masters in Personnel Management
4. Master's in Public Relations
You can get job after tourism in the field of tour and travel department as well as airport.
Some of websites like:
Makemytrip.com
Yatra.com
Read more: http://mbadiscussions.com/what-scope-doing-mba-tourism-right-choice-what-job-opportunities-after-doing-course-8294.html#ixzz4jNhhruMP

The business environment is witnessing unprecedented changes, creating new opportunities and challenges in the process. Paradigms are shifting in every industry and in every economy. New knowledge and skills are required to achieve success in this time of transition. With increasing demands on aviation business; executives to stay relevant, embrace new technologies and manage stakeholder expectations.
India is one of the fastest growing aviation markets in the world. With the liberalization of the Indian aviation sector, the industry had witnessed a transformation with the entry of the new private airlines and low cost carriers. The sector has also seen a significant increase in number of domestic air travel passengers. The aviation Industry in India is expected to grow at a compounded annual growth rate of over 25%. Aviation and Airport are in for exponential growth. The aviation industry supports over 2 million jobs across 5 continents. Many airline jobs are well-paying & offer prestige as well as excitement and fantastic job opportunities. Airlines and Airport operations are the very dynamic business fields with millions of passengers are travelling through thousands of flights every day, touching hundreds of Airports Worldwide. Aviation is a fun, exciting industry with great growth prospects. It is also the kind of industry that offers fantastic international job prospects.
https://www.shiksha.com/aviation/articles/mba-airline-airport-management-blogId-3783

MBA has evolved continuously in last few decades. To cater growing demand of professionals of manufacturing firms. MBA in Operations was introduced and within no time graduates in MBA Operations have shown their mantle by increasing efficiency, productivity and performance for the firms they work for. However, MBA in Operations just not mean only manufacturing. It covers a list of business skills required in business, especially those engaged in manufacturing of products. The area of operations management suits to anyone who wants to work with a wide variety of aspects like people, technology, machines, and processes
Operations managers' job is no less than a five year experienced engineer, as it involves streamlining of all manner of processes, from workflow and product development to operations across different products the company produces.
Top global b schools for operations management are- HBS, MIT Sloan, and INSEAD, which aim to broaden student's skills in order to maximize their flexibility, analysis, and problem solving skills. Here in India, MBA in Operations management offered by IIM Ahmadabad, IIM Bangalore, NITIE Mumbai, SP Jain Mumbai and SIBM Pune are well respected across industries.