Is WN999 delayed?
Service date: · Scheduled departure date (America/New_York)
Arrived
16 min early
Updated
Departure
Boston
BOS
Actual
Scheduled 05:30
Aug 22
Arrival
St Louis
STL
Actual
Scheduled 12:20
Aug 22
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Actual
BOSSTL
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 15 min early
MCI → DEN
- 91 min late
MCI → DEN
- 44 min late
BOS → STL
- 43 min late
BOS → STL
- 15 min early
MCI → DEN
Flight history and details
Aug 20, 2026 — Sep 19, 2026
- Observed arrivals
- 16
- Arrivals over 15 minutes late
- 5
- Observed cancellations
- 0
- Observed occurrences
- 17
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 18, 2026Arrived | Kansas City | Denver | -15 | |
| Sep 17, 2026Arrived | Kansas City | Denver | 91 | |
| Sep 16, 2026Arrived | Boston | St Louis | 44 | |
| Sep 15, 2026Arrived | Boston | St Louis | 43 | |
| Sep 14, 2026Arrived | Kansas City | Denver | -15 | |
| Sep 9, 2026Arrived | Boston | St Louis | -23 | |
| Sep 8, 2026Arrived | Boston | St Louis | -16 | |
| Sep 5, 2026Arrived | Boston | St Louis | -3 | |
| Sep 4, 2026Arrived | Kansas City | Denver | 0 | |
| Sep 2, 2026Arrived | Boston | St Louis | 112 | |
| Sep 1, 2026Arrived | Boston | St Louis | 159 | |
| Aug 30, 2026Arrived | Boston | St Louis | -26 | |
| Aug 29, 2026Arrived | Boston | St Louis | -4 | |
| Aug 26, 2026Arrived | Boston | St Louis | -4 | |
| Aug 25, 2026Arrived | Boston | St Louis | 5 | |
| Aug 22, 2026Arrived | Boston | St Louis | -16 |