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9,068 nonstop flights · Aug 2025 – Jul 2026 · US DOT on-time records, all US airlines

Leave before 9 am: 92% depart on time. After 4 pm it’s 2 in 3.

Best time to leave 7–8 am 92% arrive on time from IAH, 91% arrive on time from HOU
Best airport pair IAH → IAD 82% on time, fewest cancelled (0.4%), 1,871 flights
Best single flight UA 1549 IAH 07:20 → IAD 11:28 · 92% on time Avoid UA 1627 IAH 18:05 → DCA 22:15 · 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).

5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
IAH
79
87
95
83
86
79
84
77
85
72
62
71
70
77
HOU
92
96
88
92
84
78
79
67
64
58
55
63
57
49
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) 5,183 79% 0.6% 66 min
Spirit IAH→BWI only 332 79% 1.8% 60 min
American (incl. PSA, Republic) IAH→DCA only 873 74% 5.6% 87 min
Southwest 2,531 73% 1.5% 51 min
Frontier IAH→BWI only 149 – 5.4% 73 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 1549 IAH 07:20 IAD 11:28 92%
UA 2311 IAH 09:47 DCA 13:57 84%
UA 2366 IAH 12:13 IAD 16:30 82%
UA 1720 IAH 12:16 BWI 16:30 81%
UA 654 IAH 11:55 DCA 16:03 75%
· · ·
UA 1373 IAH 18:32 IAD 22:43 73%
UA 2224 IAH 19:50 DCA 23:59 70%
UA 1627 IAH 18:05 DCA 22:15 66%

All 37 flights in the current schedule

Every flight that flew in the Jun 6 – Jul 31, 2026 schedule, with its record over Aug 2025 – Jul 2026. Times are local. Click a column to sort.
WN 3797 HOU 05:25 BWI 09:30 3h 05m 58 95% 1.7% 22 min
AA 5247flown by PSA IAH 06:43 DCA 10:59 3h 13m 71 94% 7.0% 216 min
UA 1549 IAH 07:20 IAD 11:28 3h 08m 346 92% 0.6% 59 min
UA 604 IAH 07:40 BWI 11:47 3h 07m 115 89% 0.0% 35 min
UA 2047 IAH 07:46 DCA 11:56 3h 10m 36 97% 0.0% 24 min
UA 2140 IAH 07:46 DCA 11:56 3h 10m 35 83% 0.0% 46 min
WN 4392 HOU 08:05 DCA 12:05 3h 00m 16 87% 0.0% 45 min
WN 1701 HOU 08:15 DCA 12:20 3h 05m 40 82% 0.0% 28 min
AA 5598flown by PSA IAH 08:52 DCA 12:59 3h 07m 35 73% 5.7% 248 min
UA 2311 IAH 09:47 DCA 13:57 3h 10m 275 84% 0.4% 54 min
UA 2670 IAH 09:47 DCA 13:57 3h 10m 32 88% 0.0% 72 min
WN 1960 HOU 10:30 BWI 14:35 3h 05m 57 73% 1.8% 56 min
AA 5526flown by PSA IAH 10:48 DCA 15:03 3h 15m 26 62% 11.5% 94 min
UA 654 IAH 11:55 DCA 16:03 3h 08m 301 75% 0.7% 62 min
UA 2366 IAH 12:13 IAD 16:30 3h 17m 347 82% 0.3% 58 min
UA 1720 IAH 12:16 BWI 16:30 3h 14m 163 81% 0.0% 81 min
WN 1968 HOU 13:58 DCA 18:02 3h 05m 50 67% 10.0% 68 min
UA 625 IAH 14:20 DCA 18:31 3h 11m 127 69% 0.8% 68 min
UA 1478 IAH 14:31 IAD 18:50 3h 19m 45 76% 0.0% 98 min
WN 184 HOU 15:25 BWI 19:35 3h 10m 26 27% 15.4% 41 min
WN 1887 HOU 15:55 BWI 20:08 3h 12m 16 31% 0.0% 66 min
F9 3068 IAH 16:21 BWI 20:36 3h 15m 149 52% 5.4% 73 min
UA 2388 IAH 16:35 IAD 20:46 3h 11m 72 70% 0.0% 74 min
AA 5639flown by PSA IAH 16:46 DCA 20:59 3h 13m 36 45% 8.3% 147 min
UA 2296 IAH 16:55 DCA 21:06 3h 11m 35 61% 2.9% 88 min
UA 2332 IAH 16:55 DCA 21:06 3h 11m 35 53% 0.0% 118 min
AA 5333flown by PSA IAH 17:00 DCA 21:16 3h 16m 26 38% 19.2% 94 min
UA 1627 IAH 18:05 DCA 22:15 3h 10m 360 66% 0.6% 70 min
WN 4669 HOU 18:15 BWI 22:25 3h 10m 12 58% 0.0% 55 min
UA 2682 IAH 18:32 BWI 22:45 3h 13m 114 69% 1.8% 67 min
UA 1795 IAH 18:32 BWI 22:45 3h 13m 25 64% 0.0% 52 min
UA 1373 IAH 18:32 IAD 22:43 3h 11m 170 73% 1.2% 67 min
UA 2224 IAH 19:50 DCA 23:59 3h 09m 305 70% 0.7% 54 min
WN 4888 HOU 19:55 DCA 23:55 3h 00m 50 48% 4.0% 48 min
UA 2775 IAH 20:20 IAD 00:31 3h 11m 37 73% 0.0% 56 min
UA 2767 IAH 20:20 IAD 00:31 3h 11m 24 75% 0.0% 72 min
WN 1961 HOU 20:35 BWI 00:35 3h 05m 57 54% 0.0% 51 min

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 IAH IAD 3h 08m 82% 0.4% 1,871 Flying now
United IAH BWI 3h 07m 81% 0.9% 906 Flying now
United IAH DCA 3h 08m 76% 0.7% 2,406 Flying now
Southwest HOU BWI 2h 55m 75% 1.4% 1,479 Flying now
American IAH DCA 3h 10m 74% 5.6% 873 Flying now
Southwest HOU DCA 2h 55m 71% 1.7% 1,052 Flying now
Frontier IAH BWI 3h 15m 52% 5.4% 149 Flying now
Spirit IAH BWI 2h 58m 79% 1.8% 332 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