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 delay06:00–07:00-2.9min · 249 recorded · 248 measured
Gap to highest-delay hour38.1min06:00 ↔ 20:00
Recorded flights6,122BOS–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
35.316.2-2.9
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
8664330
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
—
12
12
06:00
93.6%
-2.9 min
248
249
07:00
83.8%
6.8 min
858
866
08:00
87.8%
5.9 min
253
255
09:00
Fewer than 200 measured departures
—
154
154
10:00
78.3%
14.2 min
660
666
11:00
78.1%
15.4 min
635
637
12:00
73.9%
18.7 min
395
398
13:00
Fewer than 200 measured departures
—
65
65
14:00
Fewer than 200 measured departures
—
195
196
15:00
Fewer than 200 measured departures
—
166
169
16:00
Fewer than 200 measured departures
—
133
133
17:00
72.3%
18.2 min
390
391
18:00
79.6%
12.1 min
279
284
19:00
66.1%
25.1 min
354
358
20:00
68.9%
35.3 min
209
214
21:00
79.1%
12.9 min
532
539
22:00
84.7%
8.8 min
268
270
23:00
79.2%
9.2 min
260
266
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
18.99.50.0
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
9304650
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
75.5%
14.2 min
911
930
Tuesday
83.5%
9.8 min
840
848
Wednesday
82.8%
8.7 min
842
844
Thursday
75.9%
16.7 min
915
917
Friday
80.3%
10.2 min
917
920
Saturday
79.9%
13.5 min
735
739
Sunday
74.7%
18.9 min
906
924
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
27.413.70.0
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
6813410
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
80.4%
11.7 min
541
554
Feb
73.2%
17.9 min
518
540
Mar
81.1%
8.5 min
678
681
Apr
83.1%
8.5 min
674
675
May
80.2%
11.6 min
675
677
Jun
79.2%
13.8 min
475
477
Jul
71.1%
27.4 min
422
430
Aug
80.7%
6.9 min
212
212
Sep
69.2%
20.7 min
292
292
Oct
76.3%
18.4 min
552
552
Nov
84.5%
8.2 min
516
516
Dec
80.0%
10.2 min
511
516
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 time78.1%4,780
Delayed >15 min21.0%1,286
Cancelled0.9%56
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.