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 delay05:00–06:004.1min · 354 recorded · 351 measured
Gap to highest-delay hour30.2min05:00 ↔ 19:00
Recorded flights7,487FAR–ORD
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
34.317.20.0
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
9984990
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
92.0%
4.1 min
351
354
06:00
Fewer than 200 measured departures
—
70
70
07:00
83.5%
19.3 min
707
719
08:00
79.1%
14.2 min
652
660
09:00
83.3%
8.9 min
609
615
10:00
77.7%
21.4 min
457
462
11:00
Fewer than 200 measured departures
—
83
85
12:00
74.1%
18.8 min
657
666
13:00
76.4%
23.6 min
983
998
14:00
77.4%
16.4 min
442
449
15:00
78.8%
15.4 min
320
329
16:00
72.6%
27.2 min
478
497
17:00
Fewer than 200 measured departures
—
194
201
18:00
Fewer than 200 measured departures
—
151
154
19:00
63.9%
34.3 min
501
525
20:00
75.1%
21.8 min
289
299
21:00
74.8%
15.0 min
230
241
22:00
Fewer than 200 measured departures
—
156
163
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
24.512.20.0
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
1,1265630
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%
24.5 min
1,094
1,126
Tuesday
80.8%
16.0 min
999
1,011
Wednesday
79.6%
15.8 min
1,013
1,029
Thursday
77.8%
16.3 min
1,075
1,101
Friday
76.1%
19.5 min
1,098
1,112
Saturday
77.6%
20.5 min
956
986
Sunday
75.3%
21.5 min
1,095
1,122
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
39.019.50.0
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
7713860
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
74.7%
23.3 min
582
594
Feb
73.8%
22.9 min
542
544
Mar
75.9%
19.0 min
650
666
Apr
78.1%
19.8 min
712
738
May
84.4%
10.8 min
751
760
Jun
78.3%
13.2 min
660
673
Jul
75.5%
22.1 min
751
771
Aug
81.2%
19.7 min
383
389
Sep
84.4%
8.2 min
372
375
Oct
82.4%
7.8 min
539
539
Nov
78.8%
19.5 min
713
742
Dec
65.8%
39.0 min
675
696
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 time75.8%5,677
Delayed >15 min22.1%1,653
Cancelled2.1%157
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.