Background: Healthcare reimbursement changes are contributing to increased closures of community hospitals and oncology practices, which may lead cancer patients to travel greater distances for care. Limited data exists on the impact of travel time on hospitalization rates and patient cost responsibility by phase of care for older cancer patients. Methods: This was a secondary analysis of Medicare claims from 2012-2015 for cancer patients age ≥65 receiving care in the University of Alabama at Birmingham Cancer Community Network. Patient addresses were obtained from network data, hospitalizations from inpatient claims, and patient cost responsibility from inpatient, outpatient, skilled nursing facility, carrier, and durable medical equipment claims. Drive time was calculated from patient home to cancer care site (CCS). Phase of care-specific (initial, survivorship, end-of-life [EOL]) rates of hospitalizations overall and by CCS vs. other care site (OCS) were calculated per 100 person-years. Hierarchical linear models compared average monthly phase-specific costs by drive time to CCS. Results: Of 23,605 older cancer patients, median drive time to CCS was 32 minutes (IQR 18-59), with 24% driving ≥1 hour to CCS. Rates of hospitalizations by initial (n = 14,225), survivorship (n = 18,805), and EOL (n = 8,211) phases of care were 54, 26, and 301 per 100 person-years, respectively. Higher rates of hospitalizations at OCS vs. CCS were shown for patients traveling ≥1 hour to CCS (initial, survivorship, and EOL rate of 41 vs. 20, 21 vs. 6, and 220 vs. 95 per 100 person-years, respectively). Median monthly costs by phase were $401 (IQR $182-$814) for initial, $369 (IQR $123-$1046) for survivorship, and $2075 (IQR $1123-$3723) for EOL. Patients traveling ≥1 hour to their CCS had higher cost responsibility, with patients in initial, survivorship, and EOL phases having $303 (95% CI $130-$476), $75 (95% CI $46-$105), and $736 (95% CI $308-$1164) higher average costs per month than those traveling < 1 hour, respectively. Conclusions: Cancer patients traveling further to receive care are potentially vulnerable to higher cost responsibility and limited access to care if community hospitals close, especially at EOL.