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 delay06:00–07:00-0.3min · 301 recorded · 301 measured
Gap to highest-delay hour19.7min06:00 ↔ 20:00
Recorded flights3,113COS–LAS
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
19.49.5-0.3
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
3351680
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
—
61
61
06:00
96.4%
-0.3 min
301
301
07:00
95.3%
0.9 min
234
235
08:00
86.9%
4.0 min
259
259
09:00
Fewer than 200 measured departures
—
144
144
10:00
Fewer than 200 measured departures
—
87
87
11:00
Fewer than 200 measured departures
—
128
129
12:00
73.2%
12.9 min
231
232
13:00
Fewer than 200 measured departures
—
76
76
14:00
Fewer than 200 measured departures
—
130
130
15:00
Fewer than 200 measured departures
—
137
137
16:00
Fewer than 200 measured departures
—
134
134
17:00
Fewer than 200 measured departures
—
120
120
18:00
Fewer than 200 measured departures
—
183
183
19:00
70.4%
17.8 min
318
319
20:00
63.1%
19.4 min
333
335
21:00
Fewer than 200 measured departures
—
163
165
22:00
Fewer than 200 measured departures
—
64
66
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
17.18.50.0
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
5162580
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
76.5%
12.0 min
506
506
Tuesday
82.4%
8.1 min
374
375
Wednesday
79.5%
8.8 min
376
376
Thursday
69.1%
17.1 min
504
507
Friday
69.7%
16.6 min
511
516
Saturday
83.7%
7.4 min
344
345
Sunday
73.8%
13.4 min
488
488
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
20.010.00.0
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
3161580
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%
7.3 min
252
252
Feb
78.9%
9.4 min
237
238
Mar
76.0%
11.0 min
312
313
Apr
76.4%
11.2 min
305
305
May
71.2%
15.3 min
316
316
Jun
69.3%
20.0 min
293
294
Jul
66.2%
19.9 min
296
296
Aug
Fewer than 200 measured departures
—
150
150
Sep
Fewer than 200 measured departures
—
145
146
Oct
80.0%
7.9 min
250
250
Nov
81.5%
7.0 min
281
287
Dec
76.7%
12.7 min
266
266
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 time75.4%2,346
Delayed >15 min24.3%757
Cancelled0.3%10
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.