Best Time to Fly DFW to SEA: On-Time Stats by Hour & Airline
Dallas/Fort Worth International → Seattle/Tacoma International
Data through July 2026 · Last updated October 18, 2026
5,228 flights were scheduled from Dallas/Fort Worth (DFW) to Seattle (SEA) in the last 12 months, and 70.6% of those that flew arrived on time, 7.1 points below the US average of 77.6%.
Delta Air Lines was the most punctual of the 3 airlines on the route at 78.7%, while American Airlines trailed at 65.2%.
February has been the best month (78% on time) and Sunday the weakest day of the week (68%).
2.0% of flights were cancelled, versus 1.8% nationally.
DFW to SEA on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 78.7% | 92 min | 1.8% | 715 |
| Alaska Airlines | 75.6% | 57 min | 1.2% | 1,756 |
| American Airlines | 65.2% | 64 min | 2.6% | 2,737 |
| Frontier Airlines | Limited data | 20 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DFW to SEA
On-time arrival % by scheduled departure hour (local time), 10,674 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 80.5% | 1.4% | 720 |
| 7am–8am | 85.0% | 1.4% | 1,137 |
| 8am–9am | 75.2% | 1.3% | 1,110 |
| 9am–10am | 72.9% | 0.8% | 477 |
| 10am–11am | 81.0% | 1.9% | 852 |
| 11am–12pm | Limited data | 22 | |
| 12pm–1pm | 80.3% | 1.8% | 665 |
| 1pm–2pm | 70.3% | 2.1% | 518 |
| 2pm–3pm | 67.7% | 1.0% | 592 |
| 3pm–4pm | 74.0% | 1.9% | 525 |
| 4pm–5pm | 70.1% | 2.0% | 1,016 |
| 5pm–6pm | 70.7% | 1.0% | 592 |
| 6pm–7pm | 63.0% | 1.6% | 684 |
| 7pm–8pm | 52.3% | 2.2% | 491 |
| 8pm–9pm | 56.2% | 2.1% | 717 |
| 9pm–10pm | 51.6% | 1.9% | 156 |
| 10pm–11pm | 51.5% | 3.3% | 399 |
| 11pm–12am | Limited data | 1 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DFW to SEA
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 68.0% | -5.1 pts | 0.6% | 179 |
| Christmas & New Year (Dec 20 - Jan 3) | 69.3% | -3.8 pts | 2.1% | 425 |
| Summer peak (Jun 15 - Aug 15) | 66.3% | -6.8 pts | 1.4% | 2,034 |
| All other days | 73.1% | — | 1.7% | 8,036 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).