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9,057 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 93% depart on time. After 4 pm it’s 65%.

Best time to leave 6–7 am 92% arrive on time from BWI, 92% arrive on time from IAD, 91% arrive on time from DCA
Best airport pair IAD → IAH 85% on time, fewest cancelled (0.4%), 1,873 flights
Best single flight UA 1450 DCA 06:00 → IAH 08:13 · 93% on time Avoid UA 1785 DCA 16:59 → IAH 19:27 · 66% on time

Time of day × airport

Share of this route’s flights leaving within 15 minutes, by airport and scheduled departure hour, over Aug 2025 – Jul 2026. Blank: no flights then (or fewer than 40 in the year).

6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
DCA
93
91
93
87
88
83
70
80
59
49
70
71
IAD
95
92
86
82
75
81
BWI
94
86
93
77
72
78
85
76
74
75
71
65
58
46
56
46
% of this route’s flights leaving within 15 min (small number: flights in the Jun 6 – Jul 31, 2026 schedule): 85+75–8465–7455–64under 55

Pick an hour to see this route’s flights leaving then.

Airlines on this route

Arriving within 15 minutes. Regional flights count under the airline that sells them. Pick an airline to see its flights.
United (incl. SkyWest, Mesa) 5,185 85% 0.8% 79 min
Southwest 2,521 77% 1.5% 57 min
Spirit BWI→IAH only 331 76% 2.4% 103 min
American (incl. PSA, Republic) DCA→IAH only 871 73% 5.5% 69 min
Frontier BWI→IAH only 149 – 6.0% 96 min

Dimmed: fewer than 150 flights in the year, too few to rank.

Flights, best and worst

Flights in the Jun 6 – Jul 31, 2026 schedule that ran 150+ times in the year. Times are local. Pick a flight for its history.
UA 1450 DCA 06:00 IAH 08:13 93%
UA 1898 BWI 06:00 IAH 08:16 93%
UA 697 DCA 08:20 IAH 10:41 91%
UA 382 DCA 12:59 IAH 15:18 91%
UA 1524 IAD 08:40 IAH 10:59 89%
· · ·
UA 1381 DCA 14:55 IAH 17:14 78%
UA 2217 IAD 17:59 IAH 20:25 72%
UA 1785 DCA 16:59 IAH 19:27 66%
All 39 flights on this route →

Nonstops by airline and airport

Arriving within 15 minutes, Aug 2025 – Jul 2026. Pick a row to see that airline’s flights on that airport pair.
United BWI IAH 3h 32m 85% 1.3% 906 Flying now
United IAD IAH 3h 25m 85% 0.4% 1,873 Flying now
United DCA IAH 3h 22m 84% 0.8% 2,406 Flying now
Southwest DCA HOU 3h 30m 77% 1.8% 1,053 Flying now
Southwest BWI HOU 3h 25m 77% 1.4% 1,468 Flying now
American DCA IAH 3h 37m 73% 5.5% 871 Flying now
Frontier BWI IAH 3h 28m 61% 6.0% 149 Flying now
Spirit BWI IAH 3h 33m 76% 2.4% 331 Not flying now
Flying on a particular day? Pick a date above and the same ranking uses our forecast odds for each flight that day: Tomorrow.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON