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 delay06:00–07:004.1min · 493 recorded · 487 measured
Gap to highest-delay hour14.9min06:00 ↔ 11:00
Recorded flights4,779GSO–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
19.09.50.0
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
9024510
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
No observations
—
—
—
06:00
94.1%
4.1 min
487
493
07:00
92.5%
4.3 min
373
379
08:00
87.3%
4.2 min
497
503
09:00
Fewer than 200 measured departures
—
38
38
10:00
Fewer than 200 measured departures
—
100
100
11:00
77.4%
19.0 min
367
370
12:00
Fewer than 200 measured departures
—
50
50
13:00
86.4%
7.7 min
603
611
14:00
Fewer than 200 measured departures
—
89
93
15:00
Fewer than 200 measured departures
—
77
80
16:00
Fewer than 200 measured departures
—
196
203
17:00
77.4%
15.7 min
880
902
18:00
75.4%
16.3 min
560
578
19:00
Fewer than 200 measured departures
—
171
185
20:00
Fewer than 200 measured departures
—
154
165
21:00
Fewer than 200 measured departures
—
20
24
22:00
No observations
—
—
—
23:00
Fewer than 200 measured departures
—
2
5
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
15.17.50.0
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
7333670
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
82.3%
11.9 min
689
715
Tuesday
84.0%
11.4 min
618
622
Wednesday
84.5%
9.4 min
656
664
Thursday
84.3%
6.7 min
687
702
Friday
81.6%
11.1 min
684
698
Saturday
83.2%
9.5 min
620
645
Sunday
79.6%
15.1 min
710
733
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
19.89.90.0
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
5282640
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
80.7%
12.6 min
301
319
Feb
82.0%
11.1 min
345
351
Mar
80.1%
19.7 min
463
480
Apr
79.0%
10.3 min
505
520
May
86.2%
7.8 min
521
528
Jun
83.6%
9.3 min
324
334
Jul
77.4%
19.8 min
350
359
Aug
Fewer than 200 measured departures
—
189
195
Sep
90.5%
2.8 min
253
253
Oct
89.5%
4.1 min
408
409
Nov
85.0%
8.4 min
486
512
Dec
76.5%
13.6 min
519
519
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 time80.7%3,858
Delayed >15 min16.9%806
Cancelled2.4%115
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.