UA1045 SFO → ORD

United Airlines · San Francisco, CA to Chicago, IL · 53 flights observed, 2026-03-29 to 2026-05-20 · 1,846 mi

This flight's reliability varies a lot by day of week — 100% on-time on Wednesdays vs. 63% on Tuesdays.

UA1045 covers more than one route in the data window — the stats below are for SFO → ORD, the one it has flown most recently. The others are linked under “Other routes”.

On-time arrival
83%
Median delay
-14 min
90th percentile
+26 min
Cancellation rate
0%

How often is UA1045 on time?

Across 53 flights on SFO → ORD from 2026-03-29 to 2026-05-20, UA1045 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +26 min or later. 0% of flights were cancelled.

Delay distribution

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

ArrivalFlightsShare
Early / on-time4483%
16-30 min48%
31-60 min59%
61-120 min00%
2+ hrs00%

Performance by month

MonthFlightsOn-timeAvg delay
2026-033100%-8 min
2026-043080%-5 min
2026-052085%-10 min

Performance by day of week

DayFlightsOn-time
Mon875%
Tue863%
Wed8100%
Thu7100%
Fri786%
Sat771%
Sun888%

Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…