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United Airlines / IAH → SAN

UA 2399 on time

United Airlines 2399: Houston to San Diego at 12:00 p.m.; Omaha to Houston at 6:15 a.m. (past 12 months). Figures below the title are for IAH → SAN, its busiest leg

On time
80%
231 flights · likely 74–84%
Cancelled
0.0%
of scheduled flights
Typical arrival
−5 min
median vs schedule
When late
+46 min
average delay
Similar flights
85%
UA, same route & hour

About 1 in 5 UA 2399 flights from Houston arrived 15+ minutes late, diverted or cancelled over the past year (20%); 0.0% were cancelled. The typical flight landed 5 minutes early.

UA 2399: IAH → SAN

Scheduled to leave Houston at 12:00 p.m. local time. Over the past year it arrived on time 80% of the time (231 flights), worse than other UA flights on the route at that hour (85%). Last seen in the data Aug 31, 2026.

Month by month

40%70%100%Jun 2025: too few flights (3 flights)JunJul 2025: 61% on time (23 flights)61JulAug 2025: 76% on time (25 flights)76AugSep 2025: 97% on time (30 flights)97SepOct 2025: 87% on time (31 flights)87OctNov 2025: 83% on time (29 flights)83NovDec 2025: 94% on time (17 flights)94DecApr 2026: too few flights (1 flights)AprMay 2026: 81% on time (31 flights)81MayJun 2026: 63% on time (30 flights)63JunJul 2026: 84% on time (31 flights)84JulAug 2026: 58% on time (31 flights)58Aug

By day of week

DayFlightsOn time
Monday3476%
Tuesday3394%
Wednesday3394%
Thursday3263%
Friday3358%
Saturday3388%
Sunday3385%

Why it was late

Air traffic & airport (NAS) 37%Airline (crew, maintenance, ops) 30%Late inbound plane 21%Severe weather 11%

All flights IAH → SAN · Connecting off UA 2399? Check the risk

UA 2399: OMA → IAH

Scheduled to leave Omaha at 6:15 a.m. local time. Over the past year it arrived on time 92% of the time (231 flights), in line with other UA flights on the route at that hour (92%). Last seen in the data Aug 10, 2026.

Month by month

40%70%100%Dec 2025: too few flights (14 flights)DecJan 2026: 97% on time (31 flights)97JanFeb 2026: 96% on time (27 flights)96FebMar 2026: 94% on time (31 flights)94MarApr 2026: 93% on time (30 flights)93AprMay 2026: 87% on time (30 flights)87MayJun 2026: 85% on time (27 flights)85JunJul 2026: 90% on time (31 flights)90JulAug 2026: too few flights (10 flights)Aug

By day of week

DayFlightsOn time
Monday3397%
Tuesday3294%
Wednesday3190%
Thursday3491%
Friday3497%
Saturday3385%
Sunday3491%

Why it was late

Airline (crew, maintenance, ops) 64%Air traffic & airport (NAS) 26%Severe weather 11%

All flights OMA → IAH · Connecting off UA 2399? Check the risk

Questions

How often is UA 2399 from IAH to SAN late?

United Airlines 2399 from Houston, TX to San Diego, CA arrived 15 or more minutes late, was diverted or was cancelled on 20% of 231 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.

How often is UA 2399 from OMA to IAH late?

United Airlines 2399 from Omaha, NE to Houston, TX arrived 15 or more minutes late, was diverted or was cancelled on 8% of 231 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.