Delta Air Lines DFW to SEA on-time performance
Delta Air Lines nonstop flights from Dallas/Fort Worth to Seattle · Aug 2025 – Jul 2026
On-time arrivals
79%
arrived < 15 min late
Cancelled
1.8%
13 flights
Avg arrival delay
21 min
92 min when late
Rank on route
#1 of 4
route average 71% on time
Key facts
- Delta Air Lines flights on DFW to SEA arrived on time 79% of the time in Aug 2025 – Jul 2026.
- 1.8% were cancelled, and 7% arrived an hour or more late.
- That ranks #1 of 4 airlines on this route, which averaged 71% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (40%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)40%
- Late-arriving aircraft35%
- Air traffic control & airport congestion15%
- Extreme weather9%
- Security0%
Other airlines on DFW to SEA
- American Airlines65% on time · 24 min avg delay
- Alaska Airlines76% on time · 15 min avg delay
- Frontier Airlines65% on time · 10 min avg delay
Full DFW to SEA comparison →
Delta Air Lines on-time record across all routes →
715 Delta Air Lines flights tracked on this route; 13 cancelled, 2 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.