TL;DR: Most grad students leave conference funding on the table by only asking their advisor's grant and stopping there. A layered approach — department travel funds, the graduate school's own travel awards, the conference's own student travel grants, and professional society awards — can often cover a trip even when a single source wouldn't.
Why this matters beyond just the money
Conference attendance is one of the more direct ways to build a professional network, get feedback on unpublished work, and in many fields, is genuinely expected as part of normal PhD progress. Treating it as unaffordable rather than under-funded means missing opportunities that matter for the degree, not just for the trip itself.
The layered funding sources, roughly in order to check
1. Your advisor's research grant. The default and most obvious source — but often not the only one, and sometimes not even the largest.
2. Departmental travel funds. Many departments have a small, per-student annual travel budget (often $300–$1,000) that's underused because students don't ask or don't know it exists. Check with the graduate program coordinator, not just your advisor.
3. The graduate school's (university-wide) travel grant program. Separate from department-level funds, many universities have a central graduate school travel award that any enrolled student can apply for, usually requiring only a short application and proof of an accepted presentation.
4. The conference's own student travel awards. Many academic conferences offer a limited number of student travel grants, often prioritizing first-time attendees or students presenting first-author work. These are usually announced on the conference website months in advance and require a short application.
5. Professional society travel awards. Field-specific societies (IEEE, ACS, APA, and equivalents in most fields) often have dedicated student travel funding, sometimes tied to society membership.
6. Diversity-focused or underrepresented-groups travel programs. Many conferences and societies run specific travel award programs aimed at increasing participation from underrepresented groups in the field — worth checking eligibility even if not the primary identity the program is aimed at, since criteria vary.
A practical approach: stack, don't rely on one source
Applying to multiple sources for the same trip is generally acceptable (check each program's specific rules about stacking, since a few restrict this) and is the most reliable way to fully cover a trip rather than partially funding it from a single source and covering the rest out of pocket.
Timing matters more than most students expect
Most of these sources have deadlines well before the conference itself — often 2–3 months out for society and conference travel awards, and sometimes earlier for the university-wide grant. Waiting until a paper is accepted to start looking for funding often means missing the best sources' deadlines entirely.
A one-time task worth doing early
In your first year, ask your graduate program coordinator directly: "What are all the travel funding sources available to students in this department, and what are the typical deadlines?" This single conversation often surfaces two or three sources most students never find on their own.