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 delay06:00–07:00-1.3min · 1,079 recorded · 1,057 measured
Gap to highest-delay hour31.6min06:00 ↔ 20:00
Recorded flights10,516BOS–TPA
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
30.314.5-1.3
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
1,5097550
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
—
100
100
06:00
93.6%
-1.3 min
1,057
1,079
07:00
91.6%
2.5 min
1,492
1,509
08:00
83.6%
7.0 min
372
381
09:00
82.7%
8.7 min
336
340
10:00
83.8%
7.5 min
507
514
11:00
79.8%
14.1 min
1,165
1,188
12:00
65.1%
22.5 min
281
288
13:00
75.3%
18.3 min
373
381
14:00
73.5%
16.4 min
389
400
15:00
67.8%
21.9 min
885
897
16:00
61.4%
28.5 min
622
639
17:00
Fewer than 200 measured departures
—
196
202
18:00
63.9%
21.8 min
457
467
19:00
64.6%
25.4 min
910
927
20:00
57.4%
30.3 min
1,013
1,041
21:00
Fewer than 200 measured departures
—
147
160
22:00
Fewer than 200 measured departures
—
3
3
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
22.311.10.0
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
1,5907950
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
73.7%
18.7 min
1,519
1,586
Tuesday
79.9%
11.6 min
1,366
1,396
Wednesday
82.2%
9.7 min
1,393
1,406
Thursday
73.0%
15.4 min
1,566
1,573
Friday
74.9%
15.9 min
1,552
1,566
Saturday
75.3%
14.2 min
1,381
1,399
Sunday
70.0%
22.3 min
1,528
1,590
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
25.212.60.0
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
1,2666330
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
73.0%
15.3 min
843
879
Feb
73.1%
19.2 min
908
965
Mar
77.1%
16.1 min
1,186
1,212
Apr
81.3%
10.0 min
1,260
1,266
May
78.1%
10.6 min
947
949
Jun
74.3%
16.9 min
843
849
Jul
66.1%
25.2 min
887
922
Aug
76.2%
14.0 min
454
455
Sep
71.7%
19.3 min
392
396
Oct
77.5%
13.4 min
720
726
Nov
81.3%
8.7 min
880
894
Dec
71.3%
20.5 min
985
1,003
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 time73.9%7,771
Delayed >15 min24.1%2,534
Cancelled2.0%211
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.