Best Time to Fly DEN to SEA
Denver 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
DEN → SEA on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
Monthly breakdown
| Month | On-time | Cancel rate | Flights |
|---|---|---|---|
| January | 1% | 0% | 1,833 |
| February | 1% | 0% | 1,684 |
| March | 1% | 0% | 1,916 |
| April | 1% | 0% | 1,955 |
| May | 1% | 0% | 2,285 |
| June | 1% | 0% | 2,589 |
| July | 1% | 0% | 2,719 |
| August | 1% | 0% | 1,964 |
| September | 1% | 0% | 1,793 |
| October | 1% | 0% | 1,710 |
| November | 1% | 0% | 1,470 |
| December | 1% | 0% | 1,469 |
Frequently asked
What is the best month to fly from DEN to SEA?
January has the highest on-time rate at 1% for flights from Denver to Seattle.
What is the worst month to fly DEN to SEA?
January has the lowest on-time rate at 1%, often due to winter weather.
How often are DEN to SEA flights delayed?
On average, 1% of flights from DEN to SEA arrive on time. That means about 99% experience some form of delay.
Source: Bureau of Transportation Statistics.