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 delay21:00–22:00-1.3min · 290 recorded · 288 measured
Gap to highest-delay hour12.6min21:00 ↔ 15:00
Recorded flights8,574LAX–SAN
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
11.35.0-1.3
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
1,3136570
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%
1.3 min
1,308
1,313
07:00
Fewer than 200 measured departures
—
5
5
08:00
90.5%
0.5 min
534
538
09:00
90.4%
2.1 min
822
833
10:00
86.5%
4.0 min
886
886
11:00
89.7%
3.7 min
281
288
12:00
Fewer than 200 measured departures
—
131
131
13:00
Fewer than 200 measured departures
—
48
48
14:00
86.2%
3.6 min
450
451
15:00
82.6%
11.3 min
230
230
16:00
86.6%
5.0 min
411
412
17:00
86.9%
7.7 min
245
246
18:00
87.3%
4.6 min
908
918
19:00
86.8%
4.0 min
491
494
20:00
89.8%
2.9 min
607
615
21:00
90.6%
-1.3 min
288
290
22:00
90.3%
7.6 min
812
818
23:00
Fewer than 200 measured departures
—
58
58
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
6.23.10.0
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
1,2486240
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
89.7%
5.0 min
1,242
1,248
Tuesday
93.5%
0.1 min
1,248
1,248
Wednesday
89.7%
4.5 min
1,233
1,244
Thursday
89.5%
3.7 min
1,232
1,246
Friday
85.5%
6.2 min
1,230
1,244
Saturday
90.8%
2.1 min
1,106
1,113
Sunday
87.4%
3.3 min
1,224
1,231
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
9.54.80.0
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
9064530
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
89.2%
6.0 min
749
755
Feb
88.1%
5.3 min
705
706
Mar
87.5%
4.4 min
758
758
Apr
92.7%
0.6 min
820
820
May
91.6%
0.0 min
906
906
Jun
91.1%
0.7 min
828
828
Jul
88.7%
3.3 min
848
848
Aug
91.2%
1.8 min
422
422
Sep
91.6%
2.5 min
414
418
Oct
89.2%
4.9 min
656
656
Nov
89.6%
4.5 min
704
738
Dec
83.3%
9.5 min
705
719
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 time88.8%7,615
Delayed >15 min10.5%900
Cancelled0.7%59
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.