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 delay08:00–09:00-1.6min · 302 recorded · 300 measured
Gap to highest-delay hour18.3min08:00 ↔ 19:00
Recorded flights3,404CLE–IAD
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
16.87.6-1.6
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
5172590
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
95.3%
-1.1 min
514
517
07:00
No observations
—
—
—
08:00
96.0%
-1.6 min
300
302
09:00
No observations
—
—
—
10:00
94.4%
0.5 min
303
304
11:00
No observations
—
—
—
12:00
89.7%
6.0 min
425
426
13:00
Fewer than 200 measured departures
—
2
2
14:00
Fewer than 200 measured departures
—
128
129
15:00
88.2%
14.6 min
297
299
16:00
No observations
—
—
—
17:00
80.9%
15.7 min
450
460
18:00
No observations
—
—
—
19:00
80.2%
16.8 min
283
291
20:00
Fewer than 200 measured departures
—
159
161
21:00
No observations
—
—
—
22:00
84.3%
7.6 min
509
513
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
11.05.50.0
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
5402700
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
89.9%
5.6 min
533
540
Tuesday
88.7%
6.9 min
506
513
Wednesday
90.0%
6.6 min
480
483
Thursday
86.8%
9.0 min
506
510
Friday
88.0%
6.6 min
492
493
Saturday
87.7%
9.1 min
342
343
Sunday
84.2%
11.0 min
511
522
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
29.514.5-0.6
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
4622310
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
85.2%
5.0 min
209
215
Feb
Fewer than 200 measured departures
—
174
175
Mar
86.5%
10.0 min
273
273
Apr
91.3%
-0.6 min
323
323
May
91.4%
3.5 min
454
456
Jun
85.9%
12.2 min
460
462
Jul
76.5%
29.5 min
336
350
Aug
Fewer than 200 measured departures
—
178
180
Sep
Fewer than 200 measured departures
—
194
194
Oct
93.9%
0.7 min
294
294
Nov
91.5%
1.6 min
271
272
Dec
81.9%
11.4 min
204
210
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 time87.0%2,962
Delayed >15 min12.0%408
Cancelled1.0%34
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.