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 delay08:00–09:00-1.4min · 534 recorded · 529 measured
Gap to highest-delay hour29.1min08:00 ↔ 19:00
Recorded flights5,946BOS–CLE
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
27.713.1-1.4
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
8434220
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
—
20
21
06:00
93.3%
1.1 min
831
843
07:00
89.1%
3.3 min
340
348
08:00
91.7%
-1.4 min
529
534
09:00
82.6%
7.1 min
431
440
10:00
82.7%
7.6 min
237
246
11:00
87.8%
3.1 min
551
555
12:00
79.8%
9.0 min
336
339
13:00
Fewer than 200 measured departures
—
101
108
14:00
82.9%
10.2 min
525
531
15:00
81.9%
10.4 min
216
220
16:00
Fewer than 200 measured departures
—
176
181
17:00
67.2%
24.6 min
463
476
18:00
71.6%
17.4 min
232
237
19:00
64.9%
27.7 min
282
293
20:00
63.8%
25.5 min
445
453
21:00
Fewer than 200 measured departures
—
112
121
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
14.17.10.0
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
9314660
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
79.1%
11.6 min
901
930
Tuesday
82.5%
9.5 min
811
837
Wednesday
84.1%
5.6 min
817
831
Thursday
78.6%
11.6 min
915
931
Friday
78.0%
12.1 min
917
923
Saturday
83.5%
9.7 min
623
629
Sunday
77.6%
14.1 min
843
865
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
18.19.00.0
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
6483240
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
78.6%
12.4 min
359
373
Feb
74.4%
17.1 min
324
344
Mar
79.7%
13.5 min
444
452
Apr
86.8%
2.0 min
491
491
May
82.1%
8.4 min
604
606
Jun
80.8%
9.7 min
635
637
Jul
73.6%
18.1 min
609
648
Aug
85.9%
4.1 min
347
350
Sep
71.9%
15.7 min
331
340
Oct
81.0%
8.4 min
538
539
Nov
86.9%
4.6 min
604
607
Dec
77.6%
17.1 min
541
559
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%4,677
Delayed >15 min19.3%1,150
Cancelled2.0%119
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.