About 1 in 8 UA 1635 flights from Los Angeles arrived 15+ minutes late, diverted or cancelled over the past year (13%); 0.6% were cancelled. The typical flight landed 11 minutes early.
UA 1635: LAX → IAD
Scheduled to leave Los Angeles at 12:43 p.m. local time. Over the past year it arrived on time 87% of the time (347 flights), in line with other UA flights on the route at that hour (86%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 89% |
| Tuesday | 46 | 83% |
| Wednesday | 46 | 91% |
| Thursday | 52 | 90% |
| Friday | 52 | 88% |
| Saturday | 47 | 85% |
| Sunday | 51 | 84% |
Why it was late
All flights LAX → IAD · Connecting off UA 1635? Check the risk
UA 1635: IAD → ATL
Scheduled to leave Washington at 10:28 p.m. local time. Over the past year it arrived on time 74% of the time (121 flights), worse than other UA flights on the route at that hour (79%). Last seen in the data Aug 10, 2026.
Usually United Airlines's last flight of the day from Washington to Atlanta (100% of days). United Airlines's last IAD–ATL flight was cancelled 1.4% of the time, against 0.6% for its earlier ones. If it's cancelled, the next United Airlines flight is usually around 8:19 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 15 | — |
| Tuesday | 14 | — |
| Wednesday | 19 | — |
| Thursday | 18 | — |
| Friday | 18 | — |
| Saturday | 18 | — |
| Sunday | 19 | — |
Why it was late
All flights IAD → ATL · Connecting off UA 1635? Check the risk
Questions
How often is UA 1635 from LAX to IAD late?
United Airlines 1635 from Los Angeles, CA to Washington, DC arrived 15 or more minutes late, was diverted or was cancelled on 13% of 347 scheduled flights between September 2025 and August 2026. 0.6% were cancelled.
How often is UA 1635 from IAD to ATL late?
United Airlines 1635 from Washington, DC to Atlanta, GA arrived 15 or more minutes late, was diverted or was cancelled on 26% of 121 scheduled flights between September 2025 and August 2026. 2.5% 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.