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1,913 km · Domestic

Washington Dulles (IAD) – George Bush Intercontinental (IAH)

In July 2026, 318 flights operated between Washington Dulles and George Bush Intercontinental (both directions), and 75.2% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January247249▲ 0.8%
February230223▼ 3.0%
March306285▼ 6.9%
April361292▼ 19.1%
May370331▼ 10.5%
June345360▲ 4.3%
July308318▲ 3.2%
August348––
September388––
October360–in progress
November296––
December279––
Year to date (Jan–Jul)2,1672,058▼ 5.0%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January78.9%87.6%▲ 11.0%
February86.1%90.1%▲ 4.6%
March84.6%78.9%▼ 6.7%
April86.7%90.1%▲ 3.9%
May80.3%83.4%▲ 3.9%
June74.8%76.7%▲ 2.5%
July68.8%75.2%▲ 9.3%
August81.9%––
September92.3%––
October87.8%–in progress
November87.2%––
December83.5%––
Year-to-date average (Jan–Jul)80.0%83.1%▲ 3.9%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January139▼ 30.8%
February00–
March04–
April00–
May220.0%
June60▼ 100.0%
July20▼ 100.0%
August0––
September0––
October0–in progress
November0––
December0––
Year to date (Jan–Jul)2315▼ 34.8%

By direction

IAD → IAH

Scheduled flights
3,353
Flights operated
3,333
Cancelled
20 · 0.6%
On-time departures
85.1%

IAH → IAD

Scheduled flights
3,354
Flights operated
3,335
Cancelled
19 · 0.6%
On-time departures
80.5%

IAD → IAH and IAH → IAD counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
United Airlines UA 6,707 100.0% 82.8% 39

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 delay06:00–07:00-0.5min · 640 recorded · 638 measured
Gap to highest-delay hour20.7min06:00 ↔ 19:00
Recorded flights6,707IAD–IAH

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 94.8% · 640 recorded · 638 measured · Source: the US BTS 07:00 · 94.2% · 659 recorded · 654 measured · Source: the US BTS 08:00 · 90.7% · 658 recorded · 653 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 36 recorded · 36 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 119 recorded · 119 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 37 recorded · 37 measured · Source: the US BTS 12:00 · 84.6% · 1,274 recorded · 1,268 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 39 recorded · 39 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 127 recorded · 127 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 54 recorded · 54 measured · Source: the US BTS 16:00 · 77.3% · 642 recorded · 638 measured · Source: the US BTS 17:00 · 73.8% · 780 recorded · 778 measured · Source: the US BTS 18:00 · 75.5% · 637 recorded · 629 measured · Source: the US BTS 19:00 · 70.4% · 369 recorded · 368 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 128 recorded · 128 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 3 recorded · 3 measured · Source: the US BTS 22:00 · 78.0% · 505 recorded · 499 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · -0.5 min · 640 recorded · 638 measured · Source: the US BTS 07:00 · 1.8 min · 659 recorded · 654 measured · Source: the US BTS 08:00 · 5.3 min · 658 recorded · 653 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 36 recorded · 36 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 119 recorded · 119 measured · Source: the US BTS 11:00 · Fewer than 200 measured departures · 37 recorded · 37 measured · Source: the US BTS 12:00 · 10.2 min · 1,274 recorded · 1,268 measured · Source: the US BTS 13:00 · Fewer than 200 measured departures · 39 recorded · 39 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 127 recorded · 127 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 54 recorded · 54 measured · Source: the US BTS 16:00 · 17.0 min · 642 recorded · 638 measured · Source: the US BTS 17:00 · 18.0 min · 780 recorded · 778 measured · Source: the US BTS 18:00 · 13.6 min · 637 recorded · 629 measured · Source: the US BTS 19:00 · 20.2 min · 369 recorded · 368 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 128 recorded · 128 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 3 recorded · 3 measured · Source: the US BTS 22:00 · 12.6 min · 505 recorded · 499 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 640 · 640 recorded · 638 measured · Source: the US BTS 07:00 · 659 · 659 recorded · 654 measured · Source: the US BTS 08:00 · 658 · 658 recorded · 653 measured · Source: the US BTS 09:00 · 36 · 36 recorded · 36 measured · Source: the US BTS 10:00 · 119 · 119 recorded · 119 measured · Source: the US BTS 11:00 · 37 · 37 recorded · 37 measured · Source: the US BTS 12:00 · 1,274 · 1,274 recorded · 1,268 measured · Source: the US BTS 13:00 · 39 · 39 recorded · 39 measured · Source: the US BTS 14:00 · 127 · 127 recorded · 127 measured · Source: the US BTS 15:00 · 54 · 54 recorded · 54 measured · Source: the US BTS 16:00 · 642 · 642 recorded · 638 measured · Source: the US BTS 17:00 · 780 · 780 recorded · 778 measured · Source: the US BTS 18:00 · 637 · 637 recorded · 629 measured · Source: the US BTS 19:00 · 369 · 369 recorded · 368 measured · Source: the US BTS 20:00 · 128 · 128 recorded · 128 measured · Source: the US BTS 21:00 · 3 · 3 recorded · 3 measured · Source: the US BTS 22:00 · 505 · 505 recorded · 499 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:0094.8%-0.5 min638640
07:0094.2%1.8 min654659
08:0090.7%5.3 min653658
09:00Fewer than 200 measured departures—3636
10:00Fewer than 200 measured departures—119119
11:00Fewer than 200 measured departures—3737
12:0084.6%10.2 min1,2681,274
13:00Fewer than 200 measured departures—3939
14:00Fewer than 200 measured departures—127127
15:00Fewer than 200 measured departures—5454
16:0077.3%17.0 min638642
17:0073.8%18.0 min778780
18:0075.5%13.6 min629637
19:0070.4%20.2 min368369
20:00Fewer than 200 measured departures—128128
21:00Fewer than 200 measured departures—33
22:0078.0%12.6 min499505
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 83.6% · 962 recorded · 955 measured · Source: the US BTS Tuesday · 84.6% · 940 recorded · 932 measured · Source: the US BTS Wednesday · 84.1% · 943 recorded · 941 measured · Source: the US BTS Thursday · 82.6% · 959 recorded · 954 measured · Source: the US BTS Friday · 83.4% · 968 recorded · 965 measured · Source: the US BTS Saturday · 79.7% · 971 recorded · 970 measured · Source: the US BTS Sunday · 81.7% · 964 recorded · 951 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 11.0 min · 962 recorded · 955 measured · Source: the US BTS Tuesday · 10.8 min · 940 recorded · 932 measured · Source: the US BTS Wednesday · 10.0 min · 943 recorded · 941 measured · Source: the US BTS Thursday · 9.1 min · 959 recorded · 954 measured · Source: the US BTS Friday · 9.7 min · 968 recorded · 965 measured · Source: the US BTS Saturday · 13.8 min · 971 recorded · 970 measured · Source: the US BTS Sunday · 9.6 min · 964 recorded · 951 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 962 · 962 recorded · 955 measured · Source: the US BTS Tuesday · 940 · 940 recorded · 932 measured · Source: the US BTS Wednesday · 943 · 943 recorded · 941 measured · Source: the US BTS Thursday · 959 · 959 recorded · 954 measured · Source: the US BTS Friday · 968 · 968 recorded · 965 measured · Source: the US BTS Saturday · 971 · 971 recorded · 970 measured · Source: the US BTS Sunday · 964 · 964 recorded · 951 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday83.6%11.0 min955962
Tuesday84.6%10.8 min932940
Wednesday84.1%10.0 min941943
Thursday82.6%9.1 min954959
Friday83.4%9.7 min965968
Saturday79.7%13.8 min970971
Sunday81.7%9.6 min951964

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 departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · 83.3% · 518 recorded · 496 measured · Source: the US BTS Feb · 88.1% · 453 recorded · 453 measured · Source: the US BTS Mar · 81.9% · 595 recorded · 591 measured · Source: the US BTS Apr · 88.2% · 653 recorded · 653 measured · Source: the US BTS May · 81.7% · 705 recorded · 701 measured · Source: the US BTS Jun · 75.7% · 711 recorded · 705 measured · Source: the US BTS Jul · 72.0% · 628 recorded · 626 measured · Source: the US BTS Aug · 81.9% · 348 recorded · 348 measured · Source: the US BTS Sep · 92.3% · 388 recorded · 388 measured · Source: the US BTS Oct · 87.2% · 561 recorded · 561 measured · Source: the US BTS Nov · 86.5% · 593 recorded · 593 measured · Source: the US BTS Dec · 80.5% · 554 recorded · 553 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 11.7 min · 518 recorded · 496 measured · Source: the US BTS Feb · 5.2 min · 453 recorded · 453 measured · Source: the US BTS Mar · 12.4 min · 595 recorded · 591 measured · Source: the US BTS Apr · 5.9 min · 653 recorded · 653 measured · Source: the US BTS May · 9.9 min · 705 recorded · 701 measured · Source: the US BTS Jun · 17.9 min · 711 recorded · 705 measured · Source: the US BTS Jul · 22.4 min · 628 recorded · 626 measured · Source: the US BTS Aug · 10.6 min · 348 recorded · 348 measured · Source: the US BTS Sep · 1.1 min · 388 recorded · 388 measured · Source: the US BTS Oct · 6.9 min · 561 recorded · 561 measured · Source: the US BTS Nov · 5.2 min · 593 recorded · 593 measured · Source: the US BTS Dec · 11.9 min · 554 recorded · 553 measured · Source: the US BTS

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Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 518 · 518 recorded · 496 measured · Source: the US BTS Feb · 453 · 453 recorded · 453 measured · Source: the US BTS Mar · 595 · 595 recorded · 591 measured · Source: the US BTS Apr · 653 · 653 recorded · 653 measured · Source: the US BTS May · 705 · 705 recorded · 701 measured · Source: the US BTS Jun · 711 · 711 recorded · 705 measured · Source: the US BTS Jul · 628 · 628 recorded · 626 measured · Source: the US BTS Aug · 348 · 348 recorded · 348 measured · Source: the US BTS Sep · 388 · 388 recorded · 388 measured · Source: the US BTS Oct · 561 · 561 recorded · 561 measured · Source: the US BTS Nov · 593 · 593 recorded · 593 measured · Source: the US BTS Dec · 554 · 554 recorded · 553 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan83.3%11.7 min496518
Feb88.1%5.2 min453453
Mar81.9%12.4 min591595
Apr88.2%5.9 min653653
May81.7%9.9 min701705
Jun75.7%17.9 min705711
Jul72.0%22.4 min626628
Aug81.9%10.6 min348348
Sep92.3%1.1 min388388
Oct87.2%6.9 min561561
Nov86.5%5.2 min593593
Dec80.5%11.9 min553554

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 time 82.3% 5,520
  • Delayed >15 min 17.1% 1,148
  • Cancelled 0.6% 39
  • Missing departure time 0.0% 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 on this route

52
52 of 52
Flight numbersBy direction DeparturesOn time
UA1524 IAD → IAH 590 90.1%
UA1549 IAH → IAD 568 94.7%
UA2366 IAH → IAD 531 80.9%
UA1788 IAH → IAD 499 77.9%
UA1535 IAD → IAH 420 86.3%
UA2217 IAD → IAH 412 71.8%
UA2275 IAD → IAH 284 81.2%
UA1887 IAH → IAD 279 69.1%
UA2237 IAH → IAD 235 72.7%
UA2319 IAD → IAH 199 96.5%
UA1360 IAD → IAH 170 73.5%
UA1373 IAH → IAD 170 72.6%
UA1688 IAD → IAH 149 93.2%
UA2388 IAH → IAD 72 70.8%
UA2733 IAH → IAD 61 83.6%
UA1506 IAD → IAH 55 90.7%
UA1357 IAH → IAD 54 90.4%
UA1478 IAH → IAD 45 66.7%
UA2857 IAD → IAH 45 82.2%
UA1015 IAH → IAD 37 70.3%
UA1074 IAD → IAH 37 80.6%
UA1470 IAD → IAH 37 97.3%
UA1515 IAH → IAD 37 91.7%
UA1928 IAD → IAH 37 97.3%
UA1935 IAD → IAH 37 100.0%
UA1986 IAD → IAH 37 64.9%
UA2157 IAH → IAD 37 72.2%
UA2294 IAH → IAD 37 86.5%
UA2352 IAH → IAD 37 86.5%
UA2775 IAH → IAD 37 70.3%
UA326 IAH → IAD 37 86.5%
UA509 IAD → IAH 37 89.2%
UA797 IAD → IAH 37 94.4%
UA2484 IAH → IAD 36 88.9%
UA2703 IAD → IAH 36 64.7%
UA650 IAH → IAD 36 66.7%
UA740 IAD → IAH 36 97.2%
UA1346 IAH → IAD 35 91.4%
UA1743 IAD → IAH 35 94.3%
UA1907 IAD → IAH 35 91.4%
UA2050 IAD → IAH 35 77.1%
UA606 IAD → IAH 35 73.5%
UA2163 IAD → IAH 33 97.0%
UA1131 IAD → IAH 32 90.6%
UA1340 IAD → IAH 32 78.1%
UA2009 IAH → IAD 32 81.3%
UA1193 IAD → IAH 31 83.9%
UA2322 IAH → IAD 31 80.7%
UA2630 IAH → IAD 31 87.1%
UA2632 IAD → IAH 31 93.6%
UA2648 IAD → IAH 31 87.1%
UA625 IAH → IAD 31 87.1%

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.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 318 +3.2% 0 75.2%
June 2026 360 +4.3% 0 76.7%
May 2026 331 −10.5% 2 83.4%
April 2026 292 −19.1% 0 90.1%
March 2026 285 −6.9% 4 78.9%
February 2026 223 −3.0% 0 90.1%
January 2026 249 +0.8% 9 87.6%
December 2025 279 +1.8% 0 83.5%
November 2025 296 −0.3% 0 87.2%
October 2025 360 +79.1% 0 87.8%
September 2025 388 0 92.3%
August 2025 348 0 81.9%
July 2025 308 2 68.8%
June 2025 345 6 74.8%
May 2025 370 2 80.3%
April 2025 361 0 86.7%
March 2025 306 0 84.6%
February 2025 230 0 86.1%
January 2025 247 13 78.9%
December 2024 274 1 77.4%
November 2024 297 0 85.9%
October 2024 201 0 86.1%

How to read this chart

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