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 delay07:00–08:001.7min · 268 recorded · 268 measured
Gap to highest-delay hour9.9min07:00 ↔ 18:00
Recorded flights1,712SAT–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
11.65.80.0
00:0003:0006:0009:0012:0015:0018:0021:00
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Recorded flightsPartial coverage: only airlines that report on-time data to the US DOT
2681340
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
93.6%
6.2 min
220
220
07:00
93.3%
1.7 min
268
268
08:00
Fewer than 200 measured departures
—
108
108
09:00
Fewer than 200 measured departures
—
107
108
10:00
Fewer than 200 measured departures
—
15
15
11:00
Fewer than 200 measured departures
—
112
113
12:00
No observations
—
—
—
13:00
Fewer than 200 measured departures
—
47
47
14:00
No observations
—
—
—
15:00
Fewer than 200 measured departures
—
173
175
16:00
81.2%
8.1 min
266
266
17:00
Fewer than 200 measured departures
—
94
95
18:00
75.2%
11.6 min
222
222
19:00
Fewer than 200 measured departures
—
37
37
20:00
No observations
—
—
—
21:00
No observations
—
—
—
22:00
No observations
—
—
—
23:00
Fewer than 200 measured departures
—
38
38
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
19.09.50.0
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
2651330
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
83.3%
6.7 min
263
265
Tuesday
87.2%
5.7 min
235
235
Wednesday
85.1%
8.4 min
235
235
Thursday
81.3%
19.0 min
257
259
Friday
79.8%
11.8 min
252
252
Saturday
89.1%
9.7 min
210
210
Sunday
80.8%
11.4 min
255
256
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
12.36.10.0
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
2061030
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
Fewer than 200 measured departures
—
85
85
Feb
Fewer than 200 measured departures
—
113
113
Mar
Fewer than 200 measured departures
—
187
187
Apr
Fewer than 200 measured departures
—
194
196
May
Fewer than 200 measured departures
—
182
182
Jun
Fewer than 200 measured departures
—
120
120
Jul
Fewer than 200 measured departures
—
124
124
Aug
Fewer than 200 measured departures
—
62
62
Sep
Fewer than 200 measured departures
—
70
70
Oct
Fewer than 200 measured departures
—
192
192
Nov
77.9%
12.3 min
204
206
Dec
Fewer than 200 measured departures
—
174
175
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 time83.4%1,427
Delayed >15 min16.4%280
Cancelled0.3%5
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.