No delays reported for UA 1727 (BUF → DEN) as of 6:47 PM ET. It arrived on time 87.9% of the time in June-August 2026. When it was late, the average delay was 40 minutes. None were cancelled. Right now there are no reported delays at BUF, DEN.
Looks on time
Next leg BUF → DEN, scheduled 9:00 AM local time. No delays at BUF 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 |
|---|---|---|
| BUF → DEN Buffalo, NY to Denver, CO | 9:00 AM → 10:35 AM | 88% |
Local times. Schedules change; check your booking.
How reliable is UA 1727?
| Arrived on time (within 15 min) | 87.9% |
| Average delay when late | 40 min |
| Cancelled | 0% |
| Diverted | 1.1% |
| Flights tracked | 92 |
Best and worst days to fly UA 1727
UA 1727 was most reliable on Mondays (100% on time) and least reliable on Tuesdays (77%).
| Monday | |
| Tuesday | |
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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 BUF → DEN
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 1727 delayed today?
Right now there are no reported delays at BUF, DEN. Checked 6:47 PM ET. For this flight's gate and exact status, check the United app.
Is UA 1727 usually on time?
UA 1727 arrived within 15 minutes of schedule 87.9% of the time in June-August 2026, with an average delay of 40 minutes when late.
How often is UA 1727 cancelled?
0% of UA 1727 flights were cancelled in June-August 2026.