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 · Oct 12, 2024 → Jul 31, 2026
Lowest average delay09:00–10:005.9min · 248 recorded · 247 measured
Gap to highest-delay hour20.2min09:00 ↔ 19:00
Recorded flights4,224BUF–CLT
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
26.113.10.0
00:0003:0006:0009:0012:0015:0018:0021:00
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
5642820
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
Fewer than 200 measured departures
—
19
19
06:00
91.0%
14.2 min
521
529
07:00
Fewer than 200 measured departures
—
165
171
08:00
Fewer than 200 measured departures
—
69
70
09:00
87.9%
5.9 min
247
248
10:00
Fewer than 200 measured departures
—
162
167
11:00
82.4%
15.2 min
557
562
12:00
Fewer than 200 measured departures
—
110
114
13:00
74.6%
18.0 min
346
349
14:00
Fewer than 200 measured departures
—
40
40
15:00
Fewer than 200 measured departures
—
50
51
16:00
66.7%
23.0 min
555
564
17:00
Fewer than 200 measured departures
—
95
95
18:00
Fewer than 200 measured departures
—
143
147
19:00
62.8%
26.1 min
514
524
20:00
Fewer than 200 measured departures
—
44
44
21:00
Fewer than 200 measured departures
—
111
115
22:00
71.0%
23.1 min
403
415
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
27.813.90.0
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
6363180
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
70.8%
23.9 min
582
597
Tuesday
80.7%
13.3 min
584
594
Wednesday
82.3%
10.6 min
575
582
Thursday
74.3%
15.8 min
604
614
Friday
77.5%
14.5 min
591
597
Saturday
76.4%
16.8 min
592
604
Sunday
74.2%
27.8 min
623
636
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
25.512.70.0
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
4342170
JanFebMarAprMayJunJulAugSepOctNovDec
Hover, tap or focus a point to see its value, sample and source.
View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
79.6%
17.6 min
343
372
Feb
75.0%
20.3 min
336
342
Mar
78.5%
14.8 min
372
380
Apr
79.5%
15.1 min
361
362
May
77.6%
11.7 min
371
372
Jun
72.3%
20.4 min
404
410
Jul
68.5%
24.7 min
422
434
Aug
71.1%
23.9 min
242
244
Sep
Fewer than 200 measured departures
—
196
198
Oct
80.9%
15.0 min
398
400
Nov
84.4%
7.3 min
352
352
Dec
70.9%
25.5 min
354
358
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 time75.2%3,177
Delayed >15 min23.1%974
Cancelled1.7%73
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.