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 delay07:00–08:00-1.5min · 386 recorded · 377 measured
Gap to highest-delay hour31.1min07:00 ↔ 15:00
Recorded flights2,597BOS–SRQ
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
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
29.514.0-1.5
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
4682340
00:0003:0006:0009:0012:0015:0018:0021:00
Hover, tap or focus a point to see its value, sample and source.
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
—
33
33
06:00
Fewer than 200 measured departures
—
103
106
07:00
93.1%
-1.5 min
377
386
08:00
Fewer than 200 measured departures
—
185
189
09:00
Fewer than 200 measured departures
—
41
45
10:00
Fewer than 200 measured departures
—
176
180
11:00
76.7%
18.0 min
455
468
12:00
Fewer than 200 measured departures
—
168
173
13:00
Fewer than 200 measured departures
—
83
85
14:00
Fewer than 200 measured departures
—
113
119
15:00
67.5%
29.5 min
289
298
16:00
71.5%
14.8 min
200
202
17:00
Fewer than 200 measured departures
—
3
3
18:00
Fewer than 200 measured departures
—
86
88
19:00
Fewer than 200 measured departures
—
92
97
20:00
Fewer than 200 measured departures
—
123
125
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
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
34.917.50.0
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
4912460
MonTueWedThuFriSatSun
Hover, tap or focus a point to see its value, sample and source.
View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
78.1%
17.2 min
470
491
Tuesday
79.3%
12.8 min
271
279
Wednesday
81.5%
6.5 min
276
276
Thursday
76.3%
15.4 min
316
318
Friday
78.2%
11.6 min
477
485
Saturday
76.5%
17.0 min
358
367
Sunday
68.0%
34.9 min
359
381
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
28.014.00.0
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
3941970
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
73.0%
16.7 min
330
343
Feb
74.6%
16.1 min
307
328
Mar
78.8%
21.3 min
363
368
Apr
81.5%
11.2 min
394
394
May
78.0%
14.1 min
273
274
Jun
Fewer than 200 measured departures
—
101
101
Jul
Fewer than 200 measured departures
—
60
64
Aug
Fewer than 200 measured departures
—
18
18
Sep
Fewer than 200 measured departures
—
18
18
Oct
Fewer than 200 measured departures
—
134
148
Nov
82.8%
14.0 min
256
256
Dec
65.2%
28.0 min
273
285
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 time74.7%1,939
Delayed >15 min22.6%588
Cancelled2.7%70
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.