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 delay05:00–06:001.8min · 255 recorded · 250 measured
Gap to highest-delay hour23.8min05:00 ↔ 19:00
Recorded flights2,762BDL–MDW
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
25.512.80.0
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
4252130
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
94.4%
1.8 min
250
255
06:00
Fewer than 200 measured departures
—
108
108
07:00
91.3%
3.5 min
378
384
08:00
Fewer than 200 measured departures
—
18
18
09:00
Fewer than 200 measured departures
—
102
104
10:00
Fewer than 200 measured departures
—
40
40
11:00
Fewer than 200 measured departures
—
90
90
12:00
78.7%
13.1 min
356
356
13:00
74.5%
14.0 min
271
272
14:00
Fewer than 200 measured departures
—
14
14
15:00
Fewer than 200 measured departures
—
11
11
16:00
Fewer than 200 measured departures
—
31
31
17:00
Fewer than 200 measured departures
—
141
143
18:00
65.7%
20.3 min
420
425
19:00
58.4%
25.5 min
257
263
20:00
63.4%
21.4 min
246
248
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
16.08.00.0
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
4542270
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
73.3%
16.0 min
446
454
Tuesday
80.0%
11.3 min
399
401
Wednesday
83.7%
8.0 min
398
398
Thursday
75.4%
13.9 min
447
452
Friday
79.6%
12.4 min
450
454
Saturday
72.5%
14.6 min
229
232
Sunday
72.8%
15.3 min
364
371
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
27.013.50.0
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
3381690
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
Fewer than 200 measured departures
—
147
151
Feb
Fewer than 200 measured departures
—
160
166
Mar
71.0%
18.0 min
245
248
Apr
83.6%
7.0 min
262
264
May
75.2%
11.4 min
270
270
Jun
67.0%
19.9 min
318
320
Jul
65.2%
27.0 min
330
338
Aug
Fewer than 200 measured departures
—
147
148
Sep
Fewer than 200 measured departures
—
146
146
Oct
83.3%
10.0 min
246
246
Nov
85.1%
5.8 min
222
225
Dec
77.5%
13.5 min
240
240
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 time76.2%2,105
Delayed >15 min22.7%628
Cancelled1.0%29
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.