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United Airlines / IAH → EWR

UA 1397 on time

United Airlines 1397: Houston to Newark at 1:38 p.m.; Los Angeles to Houston at 7:05 a.m. (past 12 months). Figures below the title are for IAH → EWR, its busiest leg

On time
71%
321 flights · likely 66–76%
Cancelled
1.9%
of scheduled flights
Typical arrival
−4 min
median vs schedule
When late
+72 min
average delay
Similar flights
73%
UA, same route & hour

About 1 in 3 UA 1397 flights from Houston arrived 15+ minutes late, diverted or cancelled over the past year (29%); 1.9% were cancelled. The typical flight landed 4 minutes early.

UA 1397: IAH → EWR

Scheduled to leave Houston at 1:38 p.m. local time. Over the past year it arrived on time 71% of the time (321 flights), in line with other UA flights on the route at that hour (73%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Sep 2025: too few flights (7 flights)SepOct 2025: 50% on time (30 flights)50OctNov 2025: 50% on time (26 flights)50NovDec 2025: 73% on time (15 flights)73DecJan 2026: 81% on time (31 flights)81JanFeb 2026: 79% on time (28 flights)79FebMar 2026: 84% on time (31 flights)84MarApr 2026: 83% on time (30 flights)83AprMay 2026: 81% on time (31 flights)81MayJun 2026: 73% on time (30 flights)73JunJul 2026: 68% on time (31 flights)68JulAug 2026: 61% on time (31 flights)61Aug

By day of week

DayFlightsOn time
Monday4869%
Tuesday4180%
Wednesday4576%
Thursday4670%
Friday4764%
Saturday4774%
Sunday4768%

Why it was late

Air traffic & airport (NAS) 64%Late inbound plane 19%Airline (crew, maintenance, ops) 17%Severe weather 1%

All flights IAH → EWR · Connecting off UA 1397? Check the risk

UA 1397: LAX → IAH

Scheduled to leave Los Angeles at 7:05 a.m. local time. Over the past year it arrived on time 95% of the time (150 flights), in line with other UA flights on the route at that hour (94%). Last seen in the data Aug 10, 2026.

Month by month

40%70%100%May 2025: too few flights (10 flights)MayJun 2025: 92% on time (25 flights)92JunSep 2025: too few flights (6 flights)SepOct 2025: 100% on time (31 flights)100OctNov 2025: 90% on time (30 flights)90NovDec 2025: too few flights (1 flights)DecMay 2026: too few flights (11 flights)MayJun 2026: 97% on time (30 flights)97JunJul 2026: 90% on time (31 flights)90JulAug 2026: too few flights (10 flights)Aug

By day of week

DayFlightsOn time
Monday2291%
Tuesday2090%
Wednesday2090%
Thursday2295%
Friday22100%
Saturday2295%
Sunday22100%

Why it was late

Air traffic & airport (NAS) 70%Airline (crew, maintenance, ops) 30%

All flights LAX → IAH · Connecting off UA 1397? Check the risk

Questions

How often is UA 1397 from IAH to EWR late?

United Airlines 1397 from Houston, TX to Newark, NJ arrived 15 or more minutes late, was diverted or was cancelled on 29% of 321 scheduled flights between September 2025 and August 2026. 1.9% were cancelled.

How often is UA 1397 from LAX to IAH late?

United Airlines 1397 from Los Angeles, CA to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 5% of 150 scheduled flights between September 2025 and August 2026. 0.0% 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.