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 delay08:00–09:003.8min · 538 recorded · 535 measured
Gap to highest-delay hour31.3min08:00 ↔ 18:00
Recorded flights6,842DFW–IAD
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
35.117.50.0
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
1,6278140
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
—
37
38
06:00
87.4%
14.0 min
651
673
07:00
90.8%
5.6 min
789
799
08:00
90.7%
3.8 min
535
538
09:00
Fewer than 200 measured departures
—
2
2
10:00
Fewer than 200 measured departures
—
64
67
11:00
84.9%
18.7 min
285
289
12:00
82.3%
15.3 min
1,585
1,601
13:00
Fewer than 200 measured departures
—
168
171
14:00
Fewer than 200 measured departures
—
91
93
15:00
Fewer than 200 measured departures
—
33
34
16:00
Fewer than 200 measured departures
—
21
23
17:00
73.6%
20.4 min
1,596
1,627
18:00
55.4%
35.1 min
545
564
19:00
62.1%
28.5 min
282
294
20:00
Fewer than 200 measured departures
—
16
16
21:00
Fewer than 200 measured departures
—
8
9
22:00
Fewer than 200 measured departures
—
4
4
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
23.311.70.0
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
1,0635320
MonTueWedThuFriSatSun
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View the figures
Day of week
On-time departures
Average departure delay
With departure time
Recorded flights
Monday
78.9%
15.3 min
1,040
1,057
Tuesday
82.7%
12.3 min
890
914
Wednesday
77.4%
22.5 min
884
892
Thursday
78.7%
15.7 min
1,035
1,054
Friday
80.2%
12.8 min
1,047
1,063
Saturday
75.2%
23.3 min
855
871
Sunday
74.9%
21.5 min
961
991
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
26.613.30.0
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
7673840
JanFebMarAprMayJunJulAugSepOctNovDec
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View the figures
Month of year
On-time departures
Average departure delay
With departure time
Recorded flights
Jan
83.1%
11.5 min
497
539
Feb
83.2%
10.4 min
519
523
Mar
80.3%
18.0 min
618
628
Apr
78.6%
17.0 min
583
587
May
74.9%
23.9 min
652
665
Jun
71.7%
26.6 min
753
767
Jul
68.1%
25.3 min
721
737
Aug
78.8%
14.8 min
320
332
Sep
88.0%
12.0 min
366
370
Oct
85.9%
5.9 min
576
578
Nov
80.8%
16.5 min
569
576
Dec
76.6%
16.8 min
538
540
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 time76.9%5,259
Delayed >15 min21.2%1,453
Cancelled1.9%130
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.