Flight Reliability
AS 453 · Alaska Airlines
Houston → Seattle (IAH–SEA)
89
Pretty Reliable
WanderNerd Reliability Score
- 85%
- Arrive within 15 minutes
- 1 min early
- Average arrival delay
- 0.9%
- Cancelled
- 9 min early
- Median arrival delay
Based on 347 historical flights. Data through May 2026.
What the data says
Mondays have been rough.
AS 453 arrived on time 94% of the time on Fridays and just 73% on Mondays. That gap is worth planning around.
Better than the IAH–SEA route average.
AS 453 arrived on time 85% of the time, versus 77% across the IAH–SEA route.
A bit ahead of the Alaska Airlines network.
AS 453 arrived on time 85% of the time, versus 80% across the Alaska Airlines network.
Trending in the right direction.
AS 453 arrived on time 89% of the time over the last three months in the data, compared with 77% in the three months before that.
The breakdown
- Mon73%(52 flights)
- Tue84%(44 flights)
- Wed88%(42 flights)
- Thu89%(52 flights)
- Fri94%(51 flights)
- Sat84%(51 flights)
- Sun86%(51 flights)
89%
May
Jun 69% → May 89% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 69% | 29 |
| July 2025 | 90% | 30 |
| August 2025 | 96% | 28 |
| September 2025 | 95% | 21 |
| October 2025 | 90% | 29 |
| November 2025 | 93% | 30 |
| December 2025 | 74% | 31 |
| January 2026 | 63% | 30 |
| February 2026 | 93% | 28 |
| March 2026 | 84% | 31 |
| April 2026 | 93% | 30 |
| May 2026 | 89% | 26 |
- Departures on time
- 86%
- Diverted
- 0.3%
- Flights flown
- 343
- Months covered
- 12
Same route, other flights
Keep nerding
Based on 347 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.