SEA to HOU flight delays
Seattle, WA (SEA) Houston, TX (HOU) · 1,894 miles
146 flights · July 2024 – July 2026 · US Bureau of Transportation Statistics
64.38%
Arrived on time
Within 15 minutes of schedule
0%
Cancelled
Share of scheduled flights
54 min
When late, late by
Average across delayed arrivals
21 min
Delay per flight
Averaged over every flight flown
What the record says about this route
This route does worse than its own airport. SEA as a whole runs 15.1 points more punctual than these flights, which points at something specific to the route — the time of day it is scheduled, or the aircraft that feed it — rather than the airport.
This is a late route. Flights from Seattle to Houston miss their scheduled arrival often enough that a tight connection at the far end is a connection at risk.
Only Southwest Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
Which airline should you fly on this route?
Over July 2024 – July 2026, Southwest Airlines arrived on time most often on SEA to HOU. Flights ran closest to schedule in October and worst in June.
Every airline on SEA to HOU
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| Southwest Airlines | 146 | 64.38% | 0% | 54 min | D |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
HOU to SEA Houston back to Seattle 63.01% on time FOther routes from Seattle
Common questions
Are flights from Seattle to Houston usually delayed?
64.38% of flights on the SEA to HOU route arrived within 15 minutes of schedule, so roughly 4 in every ten arrived late. That is worse than the average route in this record.
Which airlines fly from Seattle to Houston?
Only Southwest Airlines appears in the published record on this route, with 146 flights and 64.38% arriving on time.
How often are SEA to HOU flights cancelled?
0% of scheduled flights did not operate — about 1 in every thousand. That is in the normal range.
When SEA to HOU flights are late, how late are they?
About 54 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on SEA to HOU during July 2024 – July 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →