Best Time to Fly SEA to DFW: On-Time Stats by Hour & Airline
Seattle/Tacoma International → Dallas/Fort Worth International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 78.2% of Seattle (SEA) to Dallas/Fort Worth (DFW) flights arrived on time (5,229 scheduled flights). That is 0.5 points above the national average of 77.6%.
Among 3 airlines, Alaska Airlines led with 80.5% on time and Delta Air Lines was last with 75.5%.
Over 24 months, Wednesday was the most reliable day (80% on time) and June the worst month (66%).
The cancellation rate was 1.9% (US average 1.8%).
SEA to DFW 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 |
|---|---|---|---|---|
| Alaska Airlines | 80.5% | 44 min | 0.8% | 1,756 |
| American Airlines | 77.5% | 95 min | 2.6% | 2,738 |
| Delta Air Lines | 75.5% | 82 min | 1.7% | 715 |
| Frontier Airlines | Limited data | 20 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly SEA to DFW
On-time arrival % by scheduled departure hour (local time), 10,676 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12am–1am | 78.7% | 0.7% | 606 |
| 1am–2am | 75.6% | 0.8% | 120 |
| 5am–6am | 91.1% | 1.2% | 646 |
| 6am–7am | 90.0% | 2.4% | 509 |
| 7am–8am | 88.9% | 1.8% | 846 |
| 8am–9am | 81.8% | 1.5% | 611 |
| 9am–10am | 75.2% | 0.8% | 903 |
| 10am–11am | 73.6% | 1.6% | 1,070 |
| 11am–12pm | 67.1% | 1.2% | 857 |
| 12pm–1pm | 63.1% | 0.0% | 269 |
| 1pm–2pm | 68.5% | 1.6% | 606 |
| 2pm–3pm | 73.2% | 0.9% | 318 |
| 3pm–4pm | 71.8% | 2.9% | 456 |
| 4pm–5pm | 71.5% | 1.9% | 155 |
| 5pm–6pm | 72.0% | 2.6% | 1,406 |
| 6pm–7pm | 72.9% | 1.4% | 424 |
| 7pm–8pm | Limited data | 8 | |
| 10pm–11pm | 71.4% | 0.5% | 209 |
| 11pm–12am | 72.2% | 2.7% | 657 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on SEA to DFW
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) | 75.9% | -2.2 pts | 0.6% | 180 |
| Christmas & New Year (Dec 20 - Jan 3) | 76.3% | -1.7 pts | 2.1% | 425 |
| Summer peak (Jun 15 - Aug 15) | 68.0% | -10.0 pts | 1.3% | 2,033 |
| All other days | 78.0% | — | 1.7% | 8,038 |
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).