Disclosed Travel Vouchers & Allowances (Annualized)
Source data compiled from official Secretary of the Senate Public Expense Reports and SOPO filings.
| Senator / State | Party | Distance (mi) | Flights | Total Disbursed | Cost / Mi | Charter Pct | Audit Classification |
|---|
SOPO Travel Allowance Mechanics
Senators receive funding through the Senators' Official Personnel and Office Expense Account (SOPO). Travel allocations vary heavily based on geographical distance from the District of Columbia and the population of the home state, explaining why Western and non-contiguous states (Alaska, Hawaii) legitimately draw the largest overall budget allowances.
Cost-Per-Mile (CPM) Discrepancy
Raw expenditure totals don't tell the full story. A senator flying from Honolulu will naturally spend more than one from Delaware. The Cost-Per-Mile metric isolates spending efficiency: commercial flights booked in advance average $0.18–$0.28/mile, whereas private charters and walk-up first-class tickets often exceed $0.75–$2.40/mile.
Charter Flight Justifications & Rules
Under Senate Select Committee on Ethics guidelines, private charter aircraft are restricted unless commercial aviation schedules would prevent a Senator from attending mandatory Senate floor votes or official constituent emergencies. This dashboard audits the divergence between scheduled commercial rates and chartered filings.