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 delay06:00–07:00-0.3min · 480 recorded · 458 measured
Gap to highest-delay hour32.6min06:00 ↔ 22:00
Recorded flights5,139BUF–JFK
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
32.416.0-0.3
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
5812910
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
—
76
77
06:00
92.4%
-0.3 min
458
480
07:00
90.6%
3.1 min
562
581
08:00
Fewer than 200 measured departures
—
161
162
09:00
81.0%
11.7 min
448
457
10:00
84.8%
8.6 min
223
233
11:00
76.2%
14.5 min
239
242
12:00
78.7%
16.4 min
230
236
13:00
80.3%
9.5 min
310
318
14:00
Fewer than 200 measured departures
—
88
91
15:00
72.6%
18.0 min
252
263
16:00
Fewer than 200 measured departures
—
190
202
17:00
69.8%
23.6 min
453
469
18:00
Fewer than 200 measured departures
—
100
102
19:00
70.0%
28.6 min
443
474
20:00
62.1%
26.1 min
338
346
21:00
Fewer than 200 measured departures
—
72
73
22:00
63.3%
32.4 min
308
332
23:00
Fewer than 200 measured departures
—
1
1
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
22.011.00.0
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
7553780
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
76.5%
17.1 min
712
754
Tuesday
81.7%
10.0 min
676
701
Wednesday
80.4%
13.2 min
688
704
Thursday
73.4%
22.0 min
722
741
Friday
78.2%
13.5 min
716
730
Saturday
78.4%
13.8 min
730
755
Sunday
72.2%
20.4 min
708
754
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
34.717.40.0
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
6773390
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
75.6%
19.5 min
295
315
Feb
72.3%
19.7 min
328
356
Mar
74.0%
15.3 min
338
341
Apr
83.4%
6.3 min
308
310
May
82.9%
9.8 min
450
450
Jun
71.8%
22.4 min
446
463
Jul
64.2%
34.7 min
416
496
Aug
79.1%
19.7 min
230
232
Sep
84.0%
10.9 min
238
240
Oct
86.6%
4.7 min
610
616
Nov
83.4%
8.8 min
669
677
Dec
68.6%
22.6 min
624
643
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 time74.4%3,823
Delayed >15 min22.0%1,129
Cancelled3.6%187
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.