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 delay17:00–18:00-3.7min · 652 recorded · 632 measured
Gap to highest-delay hour20.2min17:00 ↔ 15:00
Recorded flights4,609KTN–SEA
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
16.56.4-3.7
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
6563280
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
Fewer than 200 measured departures
—
61
61
07:00
86.4%
6.7 min
567
567
08:00
Fewer than 200 measured departures
—
153
156
09:00
84.8%
5.2 min
620
635
10:00
Fewer than 200 measured departures
—
52
52
11:00
Fewer than 200 measured departures
—
168
170
12:00
87.3%
-0.2 min
361
365
13:00
86.3%
-0.8 min
416
429
14:00
Fewer than 200 measured departures
—
93
93
15:00
71.9%
16.5 min
654
656
16:00
Fewer than 200 measured departures
—
120
121
17:00
89.1%
-3.7 min
632
652
18:00
81.4%
9.8 min
652
652
19:00
No observations
—
—
—
20:00
No observations
—
—
—
21:00
No observations
—
—
—
22:00
No observations
—
—
—
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
7.73.80.0
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
6663330
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
80.3%
7.5 min
653
660
Tuesday
84.3%
4.9 min
651
660
Wednesday
83.9%
5.5 min
650
654
Thursday
85.0%
4.7 min
640
650
Friday
80.0%
6.5 min
660
666
Saturday
81.1%
7.7 min
651
660
Sunday
80.6%
7.7 min
644
659
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
15.17.3-0.6
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
6203100
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
81.6%
6.3 min
343
364
Feb
86.0%
-0.6 min
328
336
Mar
80.3%
8.7 min
370
372
Apr
87.4%
1.9 min
358
360
May
84.6%
4.0 min
440
444
Jun
81.0%
7.6 min
559
560
Jul
77.6%
10.2 min
616
620
Aug
71.9%
15.1 min
285
286
Sep
86.6%
5.5 min
238
240
Oct
89.0%
4.5 min
309
312
Nov
87.5%
-0.3 min
345
351
Dec
76.5%
10.8 min
358
364
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 time81.1%3,737
Delayed >15 min17.6%812
Cancelled1.3%60
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.