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 delay09:00–10:002.6min · 272 recorded · 270 measured
Gap to highest-delay hour4.7min09:00 ↔ 11:00
Recorded flights1,538BOS–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
7.33.70.0
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
2721360
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
—
1
1
07:00
Fewer than 200 measured departures
—
38
38
08:00
Fewer than 200 measured departures
—
95
95
09:00
92.2%
2.6 min
270
272
10:00
Fewer than 200 measured departures
—
173
173
11:00
90.4%
7.3 min
208
211
12:00
Fewer than 200 measured departures
—
161
161
13:00
Fewer than 200 measured departures
—
42
42
14:00
Fewer than 200 measured departures
—
42
43
15:00
Fewer than 200 measured departures
—
199
202
16:00
Fewer than 200 measured departures
—
37
39
17:00
Fewer than 200 measured departures
—
132
134
18:00
Fewer than 200 measured departures
—
105
106
19:00
Fewer than 200 measured departures
—
19
21
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
19.19.50.0
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
2921460
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
77.0%
15.6 min
222
224
Tuesday
Fewer than 200 measured departures
—
178
180
Wednesday
Fewer than 200 measured departures
—
180
182
Thursday
Fewer than 200 measured departures
—
191
192
Friday
77.7%
19.1 min
220
220
Saturday
82.8%
15.8 min
290
292
Sunday
79.7%
10.2 min
241
248
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
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Average departure delayPartial coverage: only airlines that report on-time data to the US DOT
34.717.40.0
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
2981490
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
No observations
—
—
—
Feb
No observations
—
—
—
Mar
Fewer than 200 measured departures
—
26
26
Apr
Fewer than 200 measured departures
—
112
112
May
Fewer than 200 measured departures
—
177
180
Jun
74.1%
20.9 min
262
262
Jul
66.8%
34.7 min
286
298
Aug
Fewer than 200 measured departures
—
142
142
Sep
Fewer than 200 measured departures
—
127
128
Oct
Fewer than 200 measured departures
—
182
182
Nov
Fewer than 200 measured departures
—
134
134
Dec
Fewer than 200 measured departures
—
74
74
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 time79.8%1,228
Delayed >15 min19.1%294
Cancelled1.0%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.