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 delay10:00–11:000.8min · 306 recorded · 305 measured
Gap to highest-delay hour24.1min10:00 ↔ 13:00
Recorded flights1,406BOS–ILM
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
24.912.40.0
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
3061530
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
No observations
—
—
—
06:00
Fewer than 200 measured departures
—
1
1
07:00
Fewer than 200 measured departures
—
7
7
08:00
Fewer than 200 measured departures
—
125
126
09:00
Fewer than 200 measured departures
—
141
142
10:00
90.5%
0.8 min
305
306
11:00
Fewer than 200 measured departures
—
161
162
12:00
74.9%
11.5 min
207
211
13:00
67.5%
24.9 min
255
258
14:00
Fewer than 200 measured departures
—
104
108
15:00
Fewer than 200 measured departures
—
24
25
16:00
Fewer than 200 measured departures
—
52
52
17:00
Fewer than 200 measured departures
—
8
8
18:00
No observations
—
—
—
19:00
No observations
—
—
—
20:00
No observations
—
—
—
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
13.66.80.0
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
2661330
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
Fewer than 200 measured departures
—
177
182
Tuesday
Fewer than 200 measured departures
—
174
178
Wednesday
Fewer than 200 measured departures
—
181
182
Thursday
Fewer than 200 measured departures
—
180
182
Friday
Fewer than 200 measured departures
—
184
184
Saturday
85.6%
12.0 min
264
266
Sunday
76.5%
13.6 min
230
232
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
22.311.20.0
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
2801400
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
No observations
—
—
—
Feb
No observations
—
—
—
Mar
No observations
—
—
—
Apr
Fewer than 200 measured departures
—
120
120
May
77.3%
10.9 min
273
276
Jun
78.7%
17.5 min
268
268
Jul
74.7%
22.3 min
269
280
Aug
Fewer than 200 measured departures
—
142
142
Sep
Fewer than 200 measured departures
—
137
138
Oct
Fewer than 200 measured departures
—
167
168
Nov
Fewer than 200 measured departures
—
14
14
Dec
No observations
—
—
—
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 time78.7%1,107
Delayed >15 min20.1%283
Cancelled1.1%16
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.