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 delay05:00–06:00-1.6min · 752 recorded · 749 measured
Gap to highest-delay hour19.5min05:00 ↔ 19:00
Recorded flights7,586SLC–SMF
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
17.98.1-1.6
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
9534770
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
96.0%
-1.6 min
749
752
06:00
Fewer than 200 measured departures
—
140
140
07:00
Fewer than 200 measured departures
—
120
121
08:00
91.5%
2.0 min
690
692
09:00
93.5%
-0.6 min
534
537
10:00
87.5%
2.7 min
486
487
11:00
86.1%
5.2 min
681
683
12:00
Fewer than 200 measured departures
—
121
121
13:00
85.6%
4.3 min
696
697
14:00
Fewer than 200 measured departures
—
72
73
15:00
81.3%
8.9 min
739
745
16:00
Fewer than 200 measured departures
—
88
88
17:00
82.9%
9.0 min
943
953
18:00
67.8%
16.7 min
304
305
19:00
71.8%
17.9 min
319
321
20:00
Fewer than 200 measured departures
—
165
165
21:00
Fewer than 200 measured departures
—
191
192
22:00
86.5%
2.9 min
325
327
23:00
Fewer than 200 measured departures
—
186
187
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
9.04.50.0
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
1,1405700
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
85.2%
5.1 min
1,133
1,140
Tuesday
87.1%
3.6 min
1,068
1,072
Wednesday
87.6%
4.4 min
1,058
1,060
Thursday
84.7%
5.2 min
1,123
1,126
Friday
83.3%
9.0 min
1,139
1,140
Saturday
83.6%
5.5 min
902
908
Sunday
86.2%
6.2 min
1,126
1,140
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
10.85.40.0
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
8204100
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
85.9%
5.5 min
624
628
Feb
86.4%
4.3 min
594
596
Mar
85.8%
4.1 min
648
656
Apr
85.4%
2.8 min
651
654
May
86.9%
4.2 min
730
732
Jun
84.9%
6.9 min
790
792
Jul
83.5%
10.5 min
812
820
Aug
81.8%
8.1 min
378
378
Sep
86.4%
2.0 min
360
360
Oct
88.5%
2.7 min
606
606
Nov
88.5%
3.4 min
695
702
Dec
80.5%
10.8 min
661
662
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 time85.0%6,447
Delayed >15 min14.5%1,102
Cancelled0.5%37
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.