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 delay08:00–09:001.1min · 491 recorded · 485 measured
Gap to highest-delay hour18.4min08:00 ↔ 20:00
Recorded flights2,482CLE–STL
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
19.59.70.0
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
4912460
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
—
1
1
06:00
Fewer than 200 measured departures
—
68
68
07:00
92.2%
2.6 min
319
319
08:00
94.0%
1.1 min
485
491
09:00
Fewer than 200 measured departures
—
134
138
10:00
Fewer than 200 measured departures
—
109
110
11:00
Fewer than 200 measured departures
—
34
34
12:00
Fewer than 200 measured departures
—
88
88
13:00
Fewer than 200 measured departures
—
68
68
14:00
Fewer than 200 measured departures
—
45
45
15:00
Fewer than 200 measured departures
—
32
33
16:00
Fewer than 200 measured departures
—
19
19
17:00
Fewer than 200 measured departures
—
66
66
18:00
71.4%
13.1 min
262
263
19:00
64.6%
17.0 min
274
274
20:00
61.0%
19.5 min
382
384
21:00
Fewer than 200 measured departures
—
80
81
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
12.76.30.0
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
3921960
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
78.0%
11.8 min
387
392
Tuesday
86.1%
2.7 min
375
376
Wednesday
81.3%
6.8 min
374
376
Thursday
78.9%
10.8 min
383
384
Friday
80.2%
9.8 min
389
390
Saturday
80.0%
7.8 min
205
205
Sunday
74.8%
12.7 min
353
359
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
14.27.10.0
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
2381190
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
88.1%
2.4 min
219
227
Feb
85.2%
5.0 min
203
207
Mar
77.8%
10.4 min
221
222
Apr
80.5%
8.4 min
221
222
May
74.4%
14.2 min
223
224
Jun
75.9%
11.9 min
232
232
Jul
69.3%
13.5 min
238
238
Aug
Fewer than 200 measured departures
—
135
136
Sep
Fewer than 200 measured departures
—
138
138
Oct
Fewer than 200 measured departures
—
190
190
Nov
85.7%
5.4 min
216
216
Dec
77.4%
10.8 min
230
230
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 time79.4%1,971
Delayed >15 min19.9%495
Cancelled0.6%16
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.