In addition to the resources below, check funding availability from organizations with volunteer or internship opportunities. Some are able to fund travel, provide lodging or provide other sources of funding.
The American Women's Hospitals Service (AWHS) provides small grants, up to $1,500, for assistance with transportation costs (airfare, train fare, etc.) connected with pursuing medical studies in an off-campus setting where the medically neglected will benefit. For AMWA members.
Grand Challenges is a family of initiatives fostering innovation to solve key global health and development problems. Each initiative is an experiment in the use of challenges to focus innovation on making an impact. Individual challenges address some of the same problems, but from differing perspectives.
The Fogarty International Center, the international component of the NIH, publishes the Directory of International Grants and Fellowships in the Health Sciences. The Directory includes a comprehensive compilation of international funding opportunities in biomedical and behavioral research. Categorized by Pre-doctoral/Graduate, Post-doctoral, Faculty, Health Professionals, and Institutions with a seperate category for travel.
This listing from the NIH Fogarty International Center contains information on nearly 100 funding opportunities that support travel for the purpose of research or training. Opportunities span every nation of the world and range in duration from a few days to a year or more. It does not include grants offered for the purpose of attending a single specific conference.