Best Time to Fly IAH to SEA
Houston to Seattle — month-by-month delay data from the Bureau of Transportation Statistics.
Best month
January
1% on time
Worst month
January
1% on time
IAH → SEA on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
Monthly breakdown
| Month | On-time | Cancel rate | Flights |
|---|---|---|---|
| January | 1% | 0% | 531 |
| February | 1% | 0% | 471 |
| March | 1% | 0% | 598 |
| April | 1% | 0% | 610 |
| May | 1% | 0% | 739 |
| June | 1% | 0% | 844 |
| July | 1% | 0% | 927 |
| August | 1% | 0% | 674 |
| September | 1% | 0% | 581 |
| October | 1% | 0% | 525 |
| November | 1% | 0% | 450 |
| December | 1% | 0% | 479 |
Frequently asked
What is the best month to fly from IAH to SEA?
January has the highest on-time rate at 1% for flights from Houston to Seattle.
What is the worst month to fly IAH to SEA?
January has the lowest on-time rate at 1%, often due to winter weather.
How often are IAH to SEA flights delayed?
On average, 1% of flights from IAH to SEA arrive on time. That means about 99% experience some form of delay.
Source: Bureau of Transportation Statistics.