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 delay06:00–07:004.2min · 512 recorded · 504 measured
Gap to highest-delay hour10.5min06:00 ↔ 22:00
Recorded flights2,273IAD–ORF
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
14.77.30.0
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
5122560
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
91.3%
4.2 min
504
512
07:00
No observations
—
—
—
08:00
Fewer than 200 measured departures
—
182
183
09:00
No observations
—
—
—
10:00
Fewer than 200 measured departures
—
183
184
11:00
No observations
—
—
—
12:00
Fewer than 200 measured departures
—
138
138
13:00
Fewer than 200 measured departures
—
23
24
14:00
Fewer than 200 measured departures
—
133
133
15:00
Fewer than 200 measured departures
—
65
66
16:00
No observations
—
—
—
17:00
81.3%
11.0 min
256
269
18:00
No observations
—
—
—
19:00
Fewer than 200 measured departures
—
82
86
20:00
Fewer than 200 measured departures
—
164
174
21:00
No observations
—
—
—
22:00
79.4%
14.7 min
496
504
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
10.05.00.0
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
3531770
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
87.7%
8.8 min
342
351
Tuesday
91.8%
0.6 min
303
311
Wednesday
90.8%
1.1 min
325
333
Thursday
85.4%
7.3 min
349
353
Friday
84.3%
9.4 min
325
327
Saturday
86.5%
6.3 min
252
256
Sunday
83.3%
10.0 min
330
342
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
17.78.90.0
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
3021510
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
Fewer than 200 measured departures
—
149
163
Feb
Fewer than 200 measured departures
—
108
111
Mar
Fewer than 200 measured departures
—
160
162
Apr
91.0%
2.3 min
234
234
May
87.0%
10.2 min
216
219
Jun
Fewer than 200 measured departures
—
146
146
Jul
80.5%
17.7 min
200
211
Aug
Fewer than 200 measured departures
—
166
168
Sep
Fewer than 200 measured departures
—
137
137
Oct
Fewer than 200 measured departures
—
167
169
Nov
90.1%
2.5 min
294
302
Dec
78.7%
14.1 min
249
251
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 time85.3%1,938
Delayed >15 min12.7%288
Cancelled2.1%47
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.