Is UA4187 delayed?
Service date: · Scheduled departure date (UTC)
DepartedLast reported
9 min early
This update may be out of date. Check with your airline.
Update time unavailable
Departure
Dayton
DAY
Actual
Scheduled 19:04
Sep 16
Arrival
Dulles
IAD
Scheduled
Sep 16
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
- Not available
View this flight’s market
Market prices express trading expectations about a contract’s stated threshold. They do not confirm airline status. The linked market shows its terms and activity.
DAYIAD
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 22 min early
DAY → IAD
- 14 min early
DAY → IAD
- 5 min early
DAY → IAD
- 20 min early
DAY → IAD
- 26 min early
DAY → IAD
Flight history and details
Aug 17, 2026 — Sep 16, 2026
- Observed arrivals
- 13
- Arrivals over 15 minutes late
- 0
- Observed cancellations
- 4
- Observed occurrences
- 28
Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 14, 2026Arrived | Dayton | Dulles | -22 | |
| Sep 12, 2026Arrived | Dayton | Dulles | -14 | |
| Sep 11, 2026Arrived | Dayton | Dulles | -5 | |
| Sep 10, 2026Arrived | Dayton | Dulles | -20 | |
| Sep 9, 2026Arrived | Dayton | Dulles | -26 | |
| Sep 8, 2026Arrived | Little Rock | Houston | -19 | |
| Sep 7, 2026Arrived | Newark | Buffalo | -37 | |
| Sep 6, 2026Arrived | Newark | Buffalo | -29 | |
| Sep 5, 2026Arrived | Newark | Buffalo | -33 | |
| Sep 4, 2026Arrived | Newark | Buffalo | -1 | |
| Sep 2, 2026Cancelled | Newark | Buffalo | Not available | Not available |
| Sep 1, 2026Cancelled | Newark | Buffalo | Not available | Not available |
| Aug 28, 2026Arrived | Newark | Buffalo | -29 | |
| Aug 27, 2026Cancelled | Newark | Buffalo | Not available | Not available |
| Aug 21, 2026Arrived | Newark | Buffalo | -43 | |
| Aug 20, 2026Cancelled | Newark | Buffalo | Not available | Not available |