Seattle (SEA) to Dallas/Fort Worth (DFW): On-Time Performance
Data through May 2026
When you fly SEA to DFW matters as much as anything else about the booking: the route swung from 88% on-time in February 2026 to just 61% in June 2025. Across the full period the route averages 76% on-time against a national 78%.
- On-time
- 76%
- arrived <15 min late
- Avg delay
- 17 min
- completed flights
- Cancelled
- 1.7%
- Flights/day
- 14
- last 12 months
- Duration
- 3h 58m
- scheduled
- Distance
- 1,660 mi
Best airline from SEA to DFW
4 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| American Airlinesmost reliable | 78% | 18 min | 2.2% | 5,552 |
| Delta Air Lines | 77% | 20 min | 1.5% | 1,334 |
| Alaska Airlines | 73% | 13 min | 0.9% | 3,581 |
| Frontier Airlines | 52% | 44 min | 1.6% | 187 |
Monthly on-time trend
Best time to fly from SEA to DFW
Aim for departures around 7 a.m. (90% on-time); avoid 12 p.m. departures (62%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 73% | 18 min |
| Tuesday | 78% | 16 min |
| Wednesdaybest | 80% | 15 min |
| Thursday | 77% | 18 min |
| Friday | 75% | 18 min |
| Saturday | 76% | 16 min |
| Sunday | 71% | 19 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft37%
- Airline operations40%
- National airspace system20%
- Weather3%
Frequently asked questions
- How often are flights from SEA to DFW delayed?
- 24% of SEA–DFW flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 17 minutes.
- Which airline is most reliable from SEA to DFW?
- American Airlines has the best on-time record on this route at 78%, based on 5,552 flights. 4 airlines flew SEA–DFW frequently enough to compare in this period.
- What is the best time of day to fly from SEA to DFW?
- Departures around 7 a.m. have the best record (90% on-time), while departures around 12 p.m. have the worst (62%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from SEA to DFW?
- The scheduled SEA–DFW flight time averages 3h 58m over 1,660 miles. Actual arrival times vary — flights on this route land 15+ minutes late 24% of the time.
- How often are SEA to DFW flights cancelled?
- 1.7% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from SEA to DFW?
- June 2025 was the roughest month in this dataset, with only 61% of arrivals on time. The best was February 2026 at 88%. If your dates are flexible, that 27-point gap is worth planning around.
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Based on 10,654 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.