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 delay09:00–10:000.2min · 784 recorded · 779 measured
Gap to highest-delay hour18.1min09:00 ↔ 18:00
Recorded flights5,070IAD–TPA
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
18.39.20.0
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
8814410
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
Fewer than 200 measured departures
—
11
12
06:00
Fewer than 200 measured departures
—
33
33
07:00
Fewer than 200 measured departures
—
34
34
08:00
92.7%
1.5 min
647
651
09:00
92.3%
0.2 min
779
784
10:00
Fewer than 200 measured departures
—
35
37
11:00
Fewer than 200 measured departures
—
101
102
12:00
88.0%
4.5 min
878
881
13:00
86.8%
5.5 min
394
398
14:00
75.8%
16.5 min
318
322
15:00
Fewer than 200 measured departures
—
172
174
16:00
Fewer than 200 measured departures
—
53
55
17:00
78.2%
14.4 min
532
536
18:00
75.2%
18.3 min
625
633
19:00
82.0%
8.9 min
256
259
20:00
Fewer than 200 measured departures
—
14
14
21:00
Fewer than 200 measured departures
—
21
21
22:00
Fewer than 200 measured departures
—
121
124
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
13.16.50.0
MonTueWedThuFriSatSun
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Recorded flightsPartial coverage: only airlines that report on-time data to the US DOT
7773890
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
82.3%
10.2 min
767
777
Tuesday
88.4%
5.3 min
640
642
Wednesday
88.7%
3.3 min
647
649
Thursday
86.1%
7.3 min
771
774
Friday
83.2%
8.6 min
767
770
Saturday
84.8%
7.8 min
682
685
Sunday
79.9%
13.1 min
750
773
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
19.49.70.0
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
5622810
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
87.6%
3.7 min
418
428
Feb
83.8%
8.7 min
401
405
Mar
82.9%
12.5 min
554
562
Apr
90.6%
1.4 min
500
502
May
84.9%
6.1 min
477
478
Jun
78.1%
17.8 min
466
472
Jul
75.6%
19.4 min
548
557
Aug
78.9%
8.5 min
256
258
Sep
91.4%
1.3 min
245
245
Oct
90.6%
1.5 min
330
333
Nov
91.7%
1.7 min
385
386
Dec
84.5%
5.9 min
444
444
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 time83.8%4,250
Delayed >15 min15.3%774
Cancelled0.9%46
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.