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 delay09:00–10:001.1min · 482 recorded · 468 measured
Gap to highest-delay hour20.2min09:00 ↔ 18:00
Recorded flights4,038ILM–LGA
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
21.310.70.0
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
4822410
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
—
21
21
06:00
93.1%
2.7 min
379
397
07:00
Fewer than 200 measured departures
—
184
190
08:00
Fewer than 200 measured departures
—
131
132
09:00
89.7%
1.1 min
468
482
10:00
Fewer than 200 measured departures
—
118
120
11:00
85.3%
8.6 min
400
405
12:00
76.9%
10.2 min
264
275
13:00
Fewer than 200 measured departures
—
71
71
14:00
82.5%
4.9 min
331
349
15:00
75.2%
14.8 min
310
329
16:00
Fewer than 200 measured departures
—
48
52
17:00
75.1%
13.0 min
397
423
18:00
73.0%
21.3 min
200
234
19:00
69.3%
20.1 min
303
343
20:00
76.5%
10.0 min
204
213
21:00
Fewer than 200 measured departures
—
2
2
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
11.45.70.0
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
6373190
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
82.5%
8.7 min
593
637
Tuesday
83.6%
7.2 min
609
635
Wednesday
81.4%
6.4 min
603
629
Thursday
77.7%
11.4 min
586
617
Friday
82.5%
10.0 min
599
621
Saturday
86.3%
4.8 min
344
357
Sunday
81.7%
9.3 min
497
542
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
22.411.20.0
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
4742370
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
85.7%
2.2 min
308
338
Feb
83.1%
6.2 min
278
302
Mar
77.5%
13.2 min
298
326
Apr
85.3%
3.9 min
339
342
May
79.7%
10.9 min
344
354
Jun
80.2%
12.4 min
358
384
Jul
73.8%
22.4 min
290
340
Aug
Fewer than 200 measured departures
—
151
158
Sep
Fewer than 200 measured departures
—
153
156
Oct
88.1%
2.7 min
386
395
Nov
86.1%
4.5 min
467
474
Dec
74.3%
12.4 min
459
469
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 time77.8%3,141
Delayed >15 min17.1%690
Cancelled5.1%207
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.