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 delay08:00–09:000.7min · 286 recorded · 279 measured
Gap to highest-delay hour23.6min08:00 ↔ 18:00
Recorded flights6,388BUF–LGA
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
24.312.10.0
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
8204100
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
—
53
53
06:00
90.1%
7.0 min
797
820
07:00
Fewer than 200 measured departures
—
165
170
08:00
93.6%
0.7 min
279
286
09:00
83.3%
4.3 min
365
378
10:00
89.4%
4.6 min
368
375
11:00
82.0%
8.2 min
505
519
12:00
90.5%
1.5 min
357
360
13:00
77.6%
9.8 min
407
422
14:00
82.2%
9.8 min
269
276
15:00
76.5%
10.9 min
480
503
16:00
78.8%
13.0 min
491
518
17:00
71.4%
16.3 min
342
370
18:00
70.2%
24.3 min
292
323
19:00
Fewer than 200 measured departures
—
102
108
20:00
Fewer than 200 measured departures
—
154
174
21:00
70.1%
18.1 min
678
732
22:00
Fewer than 200 measured departures
—
1
1
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
13.46.70.0
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
1,0045020
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
80.9%
10.1 min
933
1,004
Tuesday
82.0%
11.0 min
951
995
Wednesday
83.1%
8.5 min
950
988
Thursday
76.5%
13.4 min
942
981
Friday
81.6%
9.9 min
939
974
Saturday
87.4%
4.7 min
554
565
Sunday
79.2%
11.4 min
836
881
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
22.811.40.0
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
6383190
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
79.5%
10.3 min
477
506
Feb
80.4%
13.8 min
448
480
Mar
80.9%
9.7 min
528
563
Apr
83.4%
8.3 min
519
521
May
81.6%
8.2 min
613
625
Jun
76.6%
14.3 min
556
597
Jul
76.4%
22.8 min
457
526
Aug
86.2%
5.7 min
362
366
Sep
89.5%
1.5 min
373
380
Oct
84.7%
4.5 min
589
600
Nov
84.6%
7.1 min
623
638
Dec
73.4%
15.1 min
560
586
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 time77.6%4,957
Delayed >15 min18.0%1,148
Cancelled4.4%283
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.