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 delay08:00–09:00-2.1min · 351 recorded · 351 measured
Gap to highest-delay hour6.2min08:00 ↔ 23:00
Recorded flights2,713LIH–SFO
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
4.11.0-2.1
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
4212110
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
Fewer than 200 measured departures
—
2
2
01:00
No observations
—
—
—
02:00
No observations
—
—
—
03:00
No observations
—
—
—
04:00
No observations
—
—
—
05:00
No observations
—
—
—
06:00
No observations
—
—
—
07:00
96.4%
-2.0 min
225
225
08:00
96.3%
-2.1 min
351
351
09:00
90.7%
1.5 min
311
311
10:00
Fewer than 200 measured departures
—
107
107
11:00
Fewer than 200 measured departures
—
4
4
12:00
97.3%
-1.4 min
222
223
13:00
Fewer than 200 measured departures
—
183
185
14:00
86.6%
2.1 min
418
421
15:00
Fewer than 200 measured departures
—
107
108
16:00
Fewer than 200 measured departures
—
159
160
17:00
Fewer than 200 measured departures
—
147
147
18:00
Fewer than 200 measured departures
—
100
101
19:00
Fewer than 200 measured departures
—
12
12
20:00
No observations
—
—
—
21:00
No observations
—
—
—
22:00
Fewer than 200 measured departures
—
148
148
23:00
95.1%
4.1 min
204
208
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
3.91.90.0
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
4852430
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
89.3%
1.8 min
429
430
Tuesday
92.6%
2.8 min
284
284
Wednesday
86.4%
3.6 min
367
369
Thursday
88.5%
3.9 min
329
329
Friday
89.4%
1.5 min
451
454
Saturday
91.1%
1.7 min
481
485
Sunday
91.9%
2.2 min
359
362
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
6.02.8-0.5
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
4062030
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
—
197
198
Feb
Fewer than 200 measured departures
—
174
177
Mar
92.0%
-0.5 min
249
250
Apr
90.3%
4.6 min
226
226
May
90.2%
0.5 min
234
234
Jun
89.1%
1.6 min
376
376
Jul
87.6%
6.0 min
404
406
Aug
Fewer than 200 measured departures
—
142
144
Sep
Fewer than 200 measured departures
—
120
120
Oct
Fewer than 200 measured departures
—
164
164
Nov
Fewer than 200 measured departures
—
166
168
Dec
84.3%
5.6 min
248
250
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 time89.4%2,425
Delayed >15 min10.1%275
Cancelled0.5%13
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.