Routes › Seattle (SEA) › SEA to HOU
Route · 12 months to July 2026
Seattle to Houston: on-time record
Seattle/Tacoma International to William P Hobby
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report. Data through July 2026; this is a monthly history, not live flight status.
Flights from Seattle (SEA) to Houston (HOU) arrived on time 60.8% of the time in the 12 months to July 2026. Reporting carriers scheduled 120 flights on the route in that period, about 0.3 a day, a distance of 1,894 miles.
That is 15.2 points below the national on-time share of 76.0% for the same period and 17.8 points below the 78.6% recorded for all departures from SEA. Flights that did arrive were 13.2 min late on average, and 0.0% of scheduled flights were cancelled (national: 1.8%).
Southwest Airlines is the only reporting carrier on the route, with 120 flights in the period.
Of the delay minutes that carriers assigned to a BTS cause category on this route, air carrier 46%, late-arriving aircraft 37% and national aviation system 15%.
- On time 60.8%
- Arrived 15+ minutes late 39.2%
- Cancelled 0.0%
- Diverted 0.0%
Airlines on the route compared
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| WN Southwest Airlines | 120 | 100% | 60.8% | 13.2 min | 0.0% |
Carriers with at least 24 flights in the 12 months to July 2026. The on-time pill is green when a carrier is at or above the route's overall share. Regional carriers operate flights sold under larger airlines' brands; BTS lists the carrier that operated the flight.
Compared with the airports and the nation
| Measure | SEA to HOU | All departures from SEA | All arrivals at HOU | All reported flights |
|---|---|---|---|---|
| Arrived on time | 60.8% | 78.6% | 76.6% | 76.0% |
| Arrived 15+ minutes late | 39.2% | 20.1% | 22.3% | 21.9% |
| Cancelled | 0.0% | 0.9% | 0.9% | 1.8% |
| Diverted | 0.0% | 0.3% | 0.2% | 0.3% |
| Average arrival delay | 13.2 min | 3.4 min | 4.9 min | 8.1 min |
| Delay minutes per 100 flights | 1,779 | 1,243 | 1,281 | 1,684 |
| Scheduled flights | 120 | 164,821 | 53,883 | 7,043,858 |
12 months to July 2026. Delay minutes count late arrivals only (an early arrival is zero), so the per-100-flights row is a normalised total rather than an average of early and late.
The return direction, HOU to SEA, recorded 67.5% on time across 120 flights in the same period.
Month by month
By scheduled departure hour
Delay causes
Seasonality
| Calendar month | Flights | On time | Cancelled | Avg arrival delay | Years in sample |
|---|---|---|---|---|---|
| Jun | 53 | 43.4% | 0.0% | 23.6 min | 2 |
| Jul | 62 | 56.5% | 0.0% | 26.5 min | 2 |
| Aug | 31 | 67.7% | 0.0% | 6.6 min | 1 |
| Sep | 30 | 93.3% | 0.0% | -3.2 min | 1 |
| Oct | 1 | 100.0% | 0.0% | 6.0 min | 1 |
Each calendar month summed across the 36 months on file, so most rows combine three years. The pill compares the month with the route's own 12-month share.
Other routes from Seattle (SEA)
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| SEA–LAX | Seattle to Los Angeles | 7,454 | 81.9% | 2.0 min | 0.8% |
| SEA–PHX | Seattle to Phoenix | 7,225 | 77.9% | 5.1 min | 0.7% |
| SEA–SFO | Seattle to San Francisco | 6,791 | 61.4% | 17.5 min | 1.1% |
| SEA–ANC | Seattle to Anchorage | 6,657 | 75.6% | 5.4 min | 0.8% |
| SEA–DEN | Seattle to Denver | 6,325 | 77.7% | 4.1 min | 0.7% |
| SEA–LAS | Seattle to Las Vegas | 5,621 | 77.4% | 5.7 min | 0.8% |
| SEA–ORD | Seattle to Chicago | 5,551 | 73.9% | 10.2 min | 1.3% |
| SEA–DFW | Seattle to Dallas/Fort Worth | 5,229 | 75.9% | 7.4 min | 1.9% |
All 92 routes and the airport record for SEA · airport record for HOU
Questions and answers
How often are flights from Seattle to Houston on time?
60.8% of the 120 flights scheduled from SEA to HOU in the 12 months to July 2026 arrived less than 15 minutes after their scheduled time. The national share for the same period was 76.0%. Cancelled and diverted flights count as not on time.
Which airline has the highest on-time share from SEA to HOU?
Southwest Airlines is the only reporting carrier with at least 60 flights on the route in the period, so there is no comparison to make.
What causes delays between Seattle and Houston?
For flights that arrived 15 or more minutes late, carriers attributed the delay minutes as follows: air carrier 46%, late-arriving aircraft 37%, national aviation system 15%, extreme weather 1%, security 1%. The categories are the carriers' own reports to BTS; weather that slows the wider system is usually recorded under the National Aviation System rather than extreme weather.
What time of day has the highest on-time share from SEA?
Too few departure hours carry enough flights on this route to compare them.
Is it getting better?
The route does not have enough flights in the previous 12 months for a year-on-year comparison. The monthly chart on this page shows the months that are available.
Where does this data come from?
Every figure is computed from the Bureau of Transportation Statistics Reporting Carrier On-Time Performance files, which list each scheduled domestic flight by the carriers required to report. This page covers August 2023 to July 2026. It shows totals and averages only; it is not a live flight-status service.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026, a US government work in the public domain. Figures are totals and averages over all scheduled flights by reporting carriers on the route; no individual flight or aircraft is identified. Times are local to the departure airport. The load factor and passenger counts from the BTS T-100 series are not included in this edition. See the methodology; report processing errors through corrections.