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United Airlines / EWR → SFO

UA 1227 on time

United Airlines 1227: Newark to San Francisco at 2:00 p.m.; Orlando to Newark at 9:10 a.m. (past 12 months). Figures below the title are for EWR → SFO, its busiest leg

On time
68%
341 flights · likely 63–73%
Cancelled
1.5%
of scheduled flights
Typical arrival
−3 min
median vs schedule
When late
+99 min
average delay
Similar flights
67%
UA, same route & hour

About 1 in 3 UA 1227 flights from Newark arrived 15+ minutes late, diverted or cancelled over the past year (32%); 1.5% were cancelled. The typical flight landed 3 minutes early.

UA 1227: EWR → SFO

Scheduled to leave Newark at 2:00 p.m. local time. Over the past year it arrived on time 68% of the time (341 flights), in line with other UA flights on the route at that hour (67%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Sep 2025: too few flights (6 flights)SepOct 2025: 74% on time (31 flights)74OctNov 2025: 73% on time (30 flights)73NovDec 2025: 65% on time (31 flights)65DecJan 2026: 68% on time (31 flights)68JanFeb 2026: 68% on time (28 flights)68FebMar 2026: 77% on time (31 flights)77MarApr 2026: 77% on time (30 flights)77AprMay 2026: 71% on time (31 flights)71MayJun 2026: 47% on time (30 flights)47JunJul 2026: 74% on time (31 flights)74JulAug 2026: 52% on time (31 flights)52Aug

By day of week

DayFlightsOn time
Monday4959%
Tuesday4877%
Wednesday4867%
Thursday4963%
Friday4973%
Saturday4969%
Sunday4967%

Why it was late

Airline (crew, maintenance, ops) 41%Air traffic & airport (NAS) 38%Late inbound plane 19%Severe weather 2%

All flights EWR → SFO · Connecting off UA 1227? Check the risk

UA 1227: MCO → EWR

Scheduled to leave Orlando at 9:10 a.m. local time. Over the past year it arrived on time 88% of the time (201 flights), in line with other UA flights on the route at that hour (87%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%May 2025: too few flights (7 flights)MayJun 2025: 89% on time (27 flights)89JunJul 2025: 81% on time (31 flights)81JulAug 2025: 83% on time (18 flights)83AugFeb 2026: 59% on time (17 flights)59FebMar 2026: 90% on time (31 flights)90MarApr 2026: 100% on time (30 flights)100AprMay 2026: 97% on time (31 flights)97MayJun 2026: 90% on time (30 flights)90JunJul 2026: 87% on time (31 flights)87JulAug 2026: 81% on time (31 flights)81Aug

By day of week

DayFlightsOn time
Monday2983%
Tuesday2889%
Wednesday2893%
Thursday2986%
Friday2986%
Saturday2993%
Sunday2986%

Why it was late

Late inbound plane 62%Airline (crew, maintenance, ops) 22%Air traffic & airport (NAS) 16%

All flights MCO → EWR · Connecting off UA 1227? Check the risk

Questions

How often is UA 1227 from EWR to SFO late?

United Airlines 1227 from Newark, NJ to San Francisco, CA arrived 15 or more minutes late, was diverted or was cancelled on 32% of 341 scheduled flights between September 2025 and August 2026. 1.5% were cancelled.

How often is UA 1227 from MCO to EWR late?

United Airlines 1227 from Orlando, FL to Newark, NJ arrived 15 or more minutes late, was diverted or was cancelled on 12% of 201 scheduled flights between September 2025 and August 2026. 2.0% were cancelled.

Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check United Airlines for today's flight. Method.