How often is UA538 on time?

Across 37 flights on SFO → PHL from 2026-01-06 to 2026-02-11, UA538 arrived within 15 minutes of schedule 97% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived 0 min or later. 5% of flights were cancelled.

Delay distribution

Arrival delay for completed flights (excludes cancellations and diversions).

Performance by month

Performance by day of week

Other routes

• UA538 on ABQ → SFO (5 flights)
• UA538 on CVG → IAD (1 flights)
• UA538 on ALB → ORD (32 flights)
• UA538 on SFO → SAN (3 flights)
• UA538 on DEN → MIA (21 flights)
• UA538 on EWR → MIA (77 flights)
• UA538 on EWR → JAC (19 flights)
• UA538 on ORD → DEN (16 flights)
• UA538 on BTV → ORD (7 flights)
• UA538 on BUR → DEN (27 flights)
• UA538 on DEN → ICT (2 flights)
• UA538 on SNA → DEN (5 flights)
• UA538 on EWR → SFO (117 flights)
• UA538 on TPA → EWR (32 flights)
• UA538 on SFO → MFR (48 flights)

Related

• All United Airlines flights on SFO → PHL
• Compare airlines on SFO → PHL
• United Airlines on the return, PHL → SFO