About 1 in 3 UA 2177 flights from San Francisco arrived 15+ minutes late, diverted or cancelled over the past year (35%); 0.0% were cancelled. The typical flight landed 4 minutes late.
UA 2177: SFO → SAN
Scheduled to leave San Francisco at 10:05 a.m. local time. Over the past year it arrived on time 65% of the time (310 flights), in line with other UA flights on the route at that hour (64%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 45 | 60% |
| Tuesday | 44 | 75% |
| Wednesday | 44 | 64% |
| Thursday | 44 | 55% |
| Friday | 44 | 59% |
| Saturday | 44 | 77% |
| Sunday | 45 | 64% |
Why it was late
All flights SFO → SAN · Connecting off UA 2177? Check the risk
UA 2177: AUS → SFO
Scheduled to leave Austin at 7:00 a.m. local time. Over the past year it arrived on time 92% of the time (270 flights), in line with other UA flights on the route at that hour (90%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 39 | 85% |
| Tuesday | 39 | 95% |
| Wednesday | 39 | 92% |
| Thursday | 39 | 92% |
| Friday | 39 | 95% |
| Saturday | 39 | 95% |
| Sunday | 36 | 89% |
Why it was late
All flights AUS → SFO · Connecting off UA 2177? Check the risk
Questions
How often is UA 2177 from SFO to SAN late?
United Airlines 2177 from San Francisco, CA to San Diego, CA arrived 15 or more minutes late, was diverted or was cancelled on 35% of 310 scheduled flights between September 2025 and August 2026. 0.0% were cancelled.
How often is UA 2177 from AUS to SFO late?
United Airlines 2177 from Austin, TX to San Francisco, CA arrived 15 or more minutes late, was diverted or was cancelled on 8% of 270 scheduled flights between September 2025 and August 2026. 0.7% 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.