ON TIMEBOARD
United Airlines / IAH → IAD

UA 1373 on time

United Airlines 1373: Houston to Washington at 6:32 p.m.; Phoenix to Houston at 12:20 p.m. (past 12 months). Figures below the title are for IAH → IAD, its busiest leg

On time
73%
192 flights · likely 66–79%
Cancelled
1.0%
of scheduled flights
Typical arrival
+1 min
median vs schedule
When late
+68 min
average delay
Similar flights
78%
UA, same route & hour

About 1 in 4 UA 1373 flights from Houston arrived 15+ minutes late, diverted or cancelled over the past year (27%); 1.0% were cancelled. The typical flight landed 1 minutes late.

UA 1373: IAH → IAD

Scheduled to leave Houston at 6:32 p.m. local time. Over the past year it arrived on time 73% of the time (192 flights), worse than other UA flights on the route at that hour (78%). Last seen in the data Aug 30, 2026.

Month by month

40%70%100%Feb 2026: 71% on time (17 flights)71FebMar 2026: 65% on time (31 flights)65MarApr 2026: 87% on time (30 flights)87AprMay 2026: 74% on time (31 flights)74MayJun 2026: 70% on time (30 flights)70JunJul 2026: 65% on time (31 flights)65JulAug 2026: 82% on time (22 flights)82Aug

By day of week

DayFlightsOn time
Monday2673%
Tuesday2576%
Wednesday2871%
Thursday2969%
Friday2972%
Saturday2665%
Sunday2983%

Why it was late

Late inbound plane 44%Air traffic & airport (NAS) 40%Airline (crew, maintenance, ops) 12%Severe weather 4%

All flights IAH → IAD · Connecting off UA 1373? Check the risk

UA 1373: PHX → IAH

Scheduled to leave Phoenix at 12:20 p.m. local time. Over the past year it arrived on time 78% of the time (158 flights), in line with other UA flights on the route at that hour (79%). Last seen in the data Aug 10, 2026.

Month by month

40%70%100%Mar 2026: 78% on time (27 flights)78MarApr 2026: 67% on time (30 flights)67AprMay 2026: 90% on time (31 flights)90MayJun 2026: 80% on time (30 flights)80JunJul 2026: 80% on time (30 flights)80JulAug 2026: too few flights (10 flights)Aug

By day of week

DayFlightsOn time
Monday2370%
Tuesday2273%
Wednesday2282%
Thursday2383%
Friday2391%
Saturday2273%
Sunday2378%

Why it was late

Late inbound plane 57%Air traffic & airport (NAS) 33%Airline (crew, maintenance, ops) 10%Severe weather 1%

All flights PHX → IAH · Connecting off UA 1373? Check the risk

Questions

How often is UA 1373 from IAH to IAD late?

United Airlines 1373 from Houston, TX to Washington, DC arrived 15 or more minutes late, was diverted or was cancelled on 27% of 192 scheduled flights between September 2025 and August 2026. 1.0% were cancelled.

How often is UA 1373 from PHX to IAH late?

United Airlines 1373 from Phoenix, AZ to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 22% of 158 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.