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3,013 km · Domestic

George Bush Intercontinental (IAH) – Seattle–Tacoma (SEA)

In July 2026, 460 flights operated between George Bush Intercontinental and Seattle–Tacoma (both directions), and 82.8% 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
January250266▲ 6.4%
February2242240.0%
March298283▼ 5.0%
April298300▲ 0.7%
May371367▼ 1.1%
June444434▼ 2.3%
July463460▼ 0.6%
August450––
September397––
October349–in progress
November296––
December337––
Year to date (Jan–Jul)2,3482,334▼ 0.6%

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
January82.0%78.9%▼ 3.8%
February77.2%83.5%▲ 8.2%
March81.2%76.3%▼ 6.0%
April77.9%85.7%▲ 10.0%
May78.7%83.9%▲ 6.6%
June68.0%81.1%▲ 19.3%
July70.4%82.8%▲ 17.6%
August76.0%––
September87.9%––
October83.1%–in progress
November79.7%––
December71.8%––
Year-to-date average (Jan–Jul)76.5%81.7%▲ 6.9%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January102▼ 80.0%
February00–
March25▲ 150.0%
April20▼ 100.0%
May30▼ 100.0%
June130▼ 100.0%
July92▼ 77.8%
August6––
September0––
October2–in progress
November0––
December0––
Year to date (Jan–Jul)399▼ 76.9%

Airlines on this route

  1. United Airlines 59.2%
  2. Alaska Airlines 40.8%

Oct 1, 2024 – Jul 31, 2026

By direction

IAH → SEA

Scheduled flights
3,687
Flights operated
3,656
Cancelled
31 · 0.8%
On-time departures
78.6%

SEA → IAH

Scheduled flights
3,686
Flights operated
3,658
Cancelled
28 · 0.8%
On-time departures
80.8%

IAH → SEA and SEA → IAH counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
United Airlines UA 4,366 59.2% 82.1% 27
Alaska Airlines AS 3,007 40.8% 76.1% 32

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 delay06:00–07:004.3min · 362 recorded · 356 measured
Gap to highest-delay hour17.9min06:00 ↔ 18:00
Recorded flights7,373IAH–SEA

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 · Fewer than 200 measured departures · 143 recorded · 141 measured · Source: the US BTS 06:00 · 91.6% · 362 recorded · 356 measured · Source: the US BTS 07:00 · 89.9% · 981 recorded · 972 measured · Source: the US BTS 08:00 · 91.9% · 222 recorded · 222 measured · Source: the US BTS 09:00 · 88.0% · 537 recorded · 533 measured · Source: the US BTS 10:00 · 82.1% · 493 recorded · 491 measured · Source: the US BTS 11:00 · 72.4% · 527 recorded · 522 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 132 recorded · 131 measured · Source: the US BTS 13:00 · 85.5% · 223 recorded · 221 measured · Source: the US BTS 14:00 · 86.5% · 282 recorded · 282 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · 76.0% · 576 recorded · 574 measured · Source: the US BTS 17:00 · 78.1% · 751 recorded · 745 measured · Source: the US BTS 18:00 · 65.2% · 383 recorded · 379 measured · Source: the US BTS 19:00 · 63.2% · 750 recorded · 740 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 167 recorded · 167 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 19 recorded · 19 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 25 recorded · 25 measured · Source: the US BTS 23:00 · 75.3% · 800 recorded · 794 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 · Fewer than 200 measured departures · 143 recorded · 141 measured · Source: the US BTS 06:00 · 4.3 min · 362 recorded · 356 measured · Source: the US BTS 07:00 · 5.5 min · 981 recorded · 972 measured · Source: the US BTS 08:00 · 5.0 min · 222 recorded · 222 measured · Source: the US BTS 09:00 · 7.4 min · 537 recorded · 533 measured · Source: the US BTS 10:00 · 8.9 min · 493 recorded · 491 measured · Source: the US BTS 11:00 · 12.8 min · 527 recorded · 522 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 132 recorded · 131 measured · Source: the US BTS 13:00 · 6.7 min · 223 recorded · 221 measured · Source: the US BTS 14:00 · 8.2 min · 282 recorded · 282 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · 16.7 min · 576 recorded · 574 measured · Source: the US BTS 17:00 · 10.1 min · 751 recorded · 745 measured · Source: the US BTS 18:00 · 22.2 min · 383 recorded · 379 measured · Source: the US BTS 19:00 · 18.3 min · 750 recorded · 740 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 167 recorded · 167 measured · Source: the US BTS 21:00 · Fewer than 200 measured departures · 19 recorded · 19 measured · Source: the US BTS 22:00 · Fewer than 200 measured departures · 25 recorded · 25 measured · Source: the US BTS 23:00 · 12.7 min · 800 recorded · 794 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 · 143 · 143 recorded · 141 measured · Source: the US BTS 06:00 · 362 · 362 recorded · 356 measured · Source: the US BTS 07:00 · 981 · 981 recorded · 972 measured · Source: the US BTS 08:00 · 222 · 222 recorded · 222 measured · Source: the US BTS 09:00 · 537 · 537 recorded · 533 measured · Source: the US BTS 10:00 · 493 · 493 recorded · 491 measured · Source: the US BTS 11:00 · 527 · 527 recorded · 522 measured · Source: the US BTS 12:00 · 132 · 132 recorded · 131 measured · Source: the US BTS 13:00 · 223 · 223 recorded · 221 measured · Source: the US BTS 14:00 · 282 · 282 recorded · 282 measured · Source: the US BTS 15:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 16:00 · 576 · 576 recorded · 574 measured · Source: the US BTS 17:00 · 751 · 751 recorded · 745 measured · Source: the US BTS 18:00 · 383 · 383 recorded · 379 measured · Source: the US BTS 19:00 · 750 · 750 recorded · 740 measured · Source: the US BTS 20:00 · 167 · 167 recorded · 167 measured · Source: the US BTS 21:00 · 19 · 19 recorded · 19 measured · Source: the US BTS 22:00 · 25 · 25 recorded · 25 measured · Source: the US BTS 23:00 · 800 · 800 recorded · 794 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———
05:00Fewer than 200 measured departures—141143
06:0091.6%4.3 min356362
07:0089.9%5.5 min972981
08:0091.9%5.0 min222222
09:0088.0%7.4 min533537
10:0082.1%8.9 min491493
11:0072.4%12.8 min522527
12:00Fewer than 200 measured departures—131132
13:0085.5%6.7 min221223
14:0086.5%8.2 min282282
15:00No observations———
16:0076.0%16.7 min574576
17:0078.1%10.1 min745751
18:0065.2%22.2 min379383
19:0063.2%18.3 min740750
20:00Fewer than 200 measured departures—167167
21:00Fewer than 200 measured departures—1919
22:00Fewer than 200 measured departures—2525
23:0075.3%12.7 min794800

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 79.2% · 1,075 recorded · 1,068 measured · Source: the US BTS Tuesday · 82.1% · 1,001 recorded · 984 measured · Source: the US BTS Wednesday · 81.7% · 1,013 recorded · 1,008 measured · Source: the US BTS Thursday · 79.8% · 1,088 recorded · 1,080 measured · Source: the US BTS Friday · 78.3% · 1,093 recorded · 1,086 measured · Source: the US BTS Saturday · 77.8% · 1,027 recorded · 1,023 measured · Source: the US BTS Sunday · 79.1% · 1,076 recorded · 1,065 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 · 13.0 min · 1,075 recorded · 1,068 measured · Source: the US BTS Tuesday · 7.9 min · 1,001 recorded · 984 measured · Source: the US BTS Wednesday · 8.9 min · 1,013 recorded · 1,008 measured · Source: the US BTS Thursday · 10.4 min · 1,088 recorded · 1,080 measured · Source: the US BTS Friday · 14.7 min · 1,093 recorded · 1,086 measured · Source: the US BTS Saturday · 12.6 min · 1,027 recorded · 1,023 measured · Source: the US BTS Sunday · 10.3 min · 1,076 recorded · 1,065 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 · 1,075 · 1,075 recorded · 1,068 measured · Source: the US BTS Tuesday · 1,001 · 1,001 recorded · 984 measured · Source: the US BTS Wednesday · 1,013 · 1,013 recorded · 1,008 measured · Source: the US BTS Thursday · 1,088 · 1,088 recorded · 1,080 measured · Source: the US BTS Friday · 1,093 · 1,093 recorded · 1,086 measured · Source: the US BTS Saturday · 1,027 · 1,027 recorded · 1,023 measured · Source: the US BTS Sunday · 1,076 · 1,076 recorded · 1,065 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday79.2%13.0 min1,0681,075
Tuesday82.1%7.9 min9841,001
Wednesday81.7%8.9 min1,0081,013
Thursday79.8%10.4 min1,0801,088
Friday78.3%14.7 min1,0861,093
Saturday77.8%12.6 min1,0231,027
Sunday79.1%10.3 min1,0651,076

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 · 80.4% · 528 recorded · 516 measured · Source: the US BTS Feb · 80.4% · 448 recorded · 448 measured · Source: the US BTS Mar · 78.8% · 588 recorded · 581 measured · Source: the US BTS Apr · 81.8% · 600 recorded · 598 measured · Source: the US BTS May · 81.3% · 741 recorded · 738 measured · Source: the US BTS Jun · 74.5% · 891 recorded · 878 measured · Source: the US BTS Jul · 76.6% · 934 recorded · 923 measured · Source: the US BTS Aug · 76.0% · 456 recorded · 450 measured · Source: the US BTS Sep · 87.9% · 397 recorded · 397 measured · Source: the US BTS Oct · 84.5% · 563 recorded · 561 measured · Source: the US BTS Nov · 83.9% · 580 recorded · 579 measured · Source: the US BTS Dec · 76.4% · 647 recorded · 645 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 · 10.5 min · 528 recorded · 516 measured · Source: the US BTS Feb · 7.7 min · 448 recorded · 448 measured · Source: the US BTS Mar · 11.1 min · 588 recorded · 581 measured · Source: the US BTS Apr · 7.7 min · 600 recorded · 598 measured · Source: the US BTS May · 11.1 min · 741 recorded · 738 measured · Source: the US BTS Jun · 19.0 min · 891 recorded · 878 measured · Source: the US BTS Jul · 15.3 min · 934 recorded · 923 measured · Source: the US BTS Aug · 13.4 min · 456 recorded · 450 measured · Source: the US BTS Sep · 3.7 min · 397 recorded · 397 measured · Source: the US BTS Oct · 7.3 min · 563 recorded · 561 measured · Source: the US BTS Nov · 6.5 min · 580 recorded · 579 measured · Source: the US BTS Dec · 11.5 min · 647 recorded · 645 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 · 528 · 528 recorded · 516 measured · Source: the US BTS Feb · 448 · 448 recorded · 448 measured · Source: the US BTS Mar · 588 · 588 recorded · 581 measured · Source: the US BTS Apr · 600 · 600 recorded · 598 measured · Source: the US BTS May · 741 · 741 recorded · 738 measured · Source: the US BTS Jun · 891 · 891 recorded · 878 measured · Source: the US BTS Jul · 934 · 934 recorded · 923 measured · Source: the US BTS Aug · 456 · 456 recorded · 450 measured · Source: the US BTS Sep · 397 · 397 recorded · 397 measured · Source: the US BTS Oct · 563 · 563 recorded · 561 measured · Source: the US BTS Nov · 580 · 580 recorded · 579 measured · Source: the US BTS Dec · 647 · 647 recorded · 645 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan80.4%10.5 min516528
Feb80.4%7.7 min448448
Mar78.8%11.1 min581588
Apr81.8%7.7 min598600
May81.3%11.1 min738741
Jun74.5%19.0 min878891
Jul76.6%15.3 min923934
Aug76.0%13.4 min450456
Sep87.9%3.7 min397397
Oct84.5%7.3 min561563
Nov83.9%6.5 min579580
Dec76.4%11.5 min645647

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 79.0% 5,827
  • Delayed >15 min 20.2% 1,487
  • Cancelled 0.8% 59
  • 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

48
48 of 48
Flight numbersBy direction DeparturesOn time
AS438 SEA → IAH 656 71.7%
AS439 IAH → SEA 640 64.3%
AS453 IAH → SEA 636 89.0%
UA2456 IAH → SEA 579 72.3%
UA2379 SEA → IAH 463 76.0%
UA2135 SEA → IAH 456 92.1%
AS398 SEA → IAH 430 72.8%
UA2606 IAH → SEA 260 84.6%
AS422 SEA → IAH 207 78.5%
UA1788 SEA → IAH 169 92.2%
UA382 IAH → SEA 148 64.6%
UA2205 IAH → SEA 125 83.2%
UA485 SEA → IAH 120 83.2%
AS399 IAH → SEA 115 95.6%
AS452 SEA → IAH 100 70.7%
UA2638 IAH → SEA 92 68.5%
UA522 IAH → SEA 87 83.7%
UA774 IAH → SEA 84 68.7%
AS241 IAH → SEA 80 87.5%
UA2340 SEA → IAH 80 83.8%
UA2293 SEA → IAH 71 87.3%
UA1005 SEA → IAH 67 97.0%
UA1894 IAH → SEA 65 89.1%
UA1660 SEA → IAH 61 80.3%
UA2748 SEA → IAH 61 93.4%
UA787 SEA → IAH 53 80.8%
UA1746 SEA → IAH 45 95.6%
UA1668 SEA → IAH 39 89.5%
UA1293 SEA → IAH 37 91.9%
UA1334 SEA → IAH 37 80.6%
UA1475 SEA → IAH 37 78.4%
UA1649 IAH → SEA 37 91.9%
UA659 IAH → SEA 37 86.5%
UA672 IAH → SEA 37 94.6%
UA690 SEA → IAH 37 91.9%
UA1563 SEA → IAH 36 80.6%
UA2654 IAH → SEA 36 97.2%
UA1351 IAH → SEA 35 94.3%
UA584 IAH → SEA 35 80.0%
AS1579 SEA → IAH 33 75.8%
UA1179 SEA → IAH 32 75.0%
UA1606 IAH → SEA 32 87.5%
UA2121 IAH → SEA 32 75.0%
UA2693 SEA → IAH 32 87.5%
UA2860 SEA → IAH 32 87.5%
UA692 IAH → SEA 32 75.0%
UA1486 IAH → SEA 31 93.6%
UA2071 IAH → SEA 30 44.8%

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 460 −0.6% 2 82.8%
June 2026 434 −2.3% 0 81.1%
May 2026 367 −1.1% 0 83.9%
April 2026 300 +0.7% 0 85.7%
March 2026 283 −5.0% 5 76.3%
February 2026 224 +0.0% 0 83.5%
January 2026 266 +6.4% 2 78.9%
December 2025 337 +9.4% 0 71.8%
November 2025 296 +4.6% 0 79.7%
October 2025 349 +64.6% 2 83.1%
September 2025 397 0 87.9%
August 2025 450 6 76.0%
July 2025 463 9 70.4%
June 2025 444 13 68.0%
May 2025 371 3 78.7%
April 2025 298 2 77.9%
March 2025 298 2 81.2%
February 2025 224 0 77.2%
January 2025 250 10 82.0%
December 2024 308 2 81.5%
November 2024 283 1 88.3%
October 2024 212 0 86.8%

How to read this chart

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