Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.
Flight timing & delays
Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.
Times are local to the departure airport of each flight; both directions are combined.
US domestic sectors recorded by BTS
Source: the US BTS · Nov 5, 2024 → Jul 31, 2026
Lowest average delay08:00–09:005.0min · 639 recorded · 633 measured
Gap to highest-delay hour14.5min08:00 ↔ 16:00
Recorded flights2,096JFK–STT
Departure hour
On-time departuresPartial coverage: only airlines that report on-time data to the US DOT
100.050.00.0
00:0003:0006:0009:0012:0015:0018:0021:00
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Average departure delayPartial coverage: only airlines that report on-time data to the US DOT
19.59.70.0
00:0003:0006:0009:0012:0015:0018:0021:00
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Recorded flightsPartial coverage: only airlines that report on-time data to the US DOT
6393200
00:0003:0006:0009:0012:0015:0018:0021:00
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View the figures
Departure hour
On-time departures
Average departure delay
With departure time
Recorded flights
00:00
No observations
—
—
—
01:00
No observations
—
—
—
02:00
No observations
—
—
—
03:00
No observations
—
—
—
04:00
No observations
—
—
—
05:00
No observations
—
—
—
06:00
No observations
—
—
—
07:00
Fewer than 200 measured departures
—
170
172
08:00
89.1%
5.0 min
633
639
09:00
88.7%
16.5 min
230
236
10:00
Fewer than 200 measured departures
—
1
1
11:00
Fewer than 200 measured departures
—
160
162
12:00
Fewer than 200 measured departures
—
4
4
13:00
Fewer than 200 measured departures
—
96
96
14:00
Fewer than 200 measured departures
—
129
131
15:00
Fewer than 200 measured departures
—
163
166
16:00
79.6%
19.5 min
352
356
17:00
Fewer than 200 measured departures
—
118
125
18:00
Fewer than 200 measured departures
—
6
8
19:00
No observations
—
—
—
20:00
No observations
—
—
—
21:00
No observations
—
—
—
22:00
No observations
—
—
—
23:00
No observations
—
—
—
Day of week
On-time departuresPartial coverage: only airlines that report on-time data to the US DOT
100.050.00.0
MonTueWedThuFriSatSun
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Average departure delayPartial coverage: only airlines that report on-time data to the US DOT
22.311.20.0
MonTueWedThuFriSatSun
Hover, tap or focus a point to see its value, sample and source.
Recorded flightsPartial coverage: only airlines that report on-time data to the US DOT
3361680
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
82.3%
15.9 min
282
292
Tuesday
87.2%
8.0 min
289
294
Wednesday
84.9%
9.5 min
291
292
Thursday
85.7%
11.6 min
294
294
Friday
86.6%
13.8 min
292
294
Saturday
80.2%
22.3 min
328
336
Sunday
79.4%
17.4 min
286
294
Month of year
Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.
On-time departuresPartial coverage: only airlines that report on-time data to the US DOT
100.050.00.0
JanFebMarAprMayJunJulAugSepOctNovDec
Hover, tap or focus a point to see its value, sample and source.
Average departure delayPartial coverage: only airlines that report on-time data to the US DOT
25.011.7-1.7
JanFebMarAprMayJunJulAugSepOctNovDec
Hover, tap or focus a point to see its value, sample and source.
Recorded flightsPartial coverage: only airlines that report on-time data to the US DOT
2481240
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
85.3%
18.3 min
231
248
Feb
77.3%
25.0 min
220
228
Mar
82.6%
15.9 min
247
248
Apr
85.5%
8.1 min
248
248
May
92.3%
-1.7 min
247
248
Jun
86.7%
10.6 min
240
240
Jul
80.2%
15.8 min
248
248
Aug
Fewer than 200 measured departures
—
71
76
Sep
Fewer than 200 measured departures
—
4
4
Oct
No observations
—
—
—
Nov
Fewer than 200 measured departures
—
125
126
Dec
Fewer than 200 measured departures
—
181
182
Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.
Recorded outcomes
On time82.3%1,726
Delayed >15 min16.0%336
Cancelled1.6%34
Missing departure time0.0%0
All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.
On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.
Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.