No delays reported for UA 2156 (IAD → LAS) as of 6:46 PM ET. It arrived on time 87.8% of the time in June-August 2026. When it was late, the average delay was 1h 21m. None were cancelled. Right now there are no reported delays at IAD, LAS.
Looks on time
Next leg IAD → LAS, scheduled 1:00 PM local time. No delays at IAD right now, and it usually runs on time.
Cancellation risk: Low 0% of its flights were cancelled in June-August 2026.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check United for official times.
Before you fly
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| IAD → LAS Washington, DC to Las Vegas, NV | 1:00 PM → 3:09 PM | 88% |
Local times. Schedules change; check your booking.
How reliable is UA 2156?
| Arrived on time (within 15 min) | 87.8% |
| Average delay when late | 81 min |
| Cancelled | 0% |
| Diverted | 1.1% |
| Flights tracked | 91 |
Best and worst days to fly UA 2156
UA 2156 was most reliable on Saturdays (100% on time) and least reliable on Wednesdays (83%).
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Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by United to the Department of Transportation.
Other flights IAD → LAS
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the United app.
United delays and what you're owed · Airline phone numbers
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is UA 2156 delayed today?
Right now there are no reported delays at IAD, LAS. Checked 6:46 PM ET. For this flight's gate and exact status, check the United app.
Is UA 2156 usually on time?
UA 2156 arrived within 15 minutes of schedule 87.8% of the time in June-August 2026, with an average delay of 81 minutes when late.
How often is UA 2156 cancelled?
0% of UA 2156 flights were cancelled in June-August 2026.