Delta Air Lines RDU to SEA on-time performance
Delta Air Lines nonstop flights from Raleigh/Durham to Seattle · Aug 2025 – Jul 2026
On-time arrivals
83%
arrived < 15 min late
Cancelled
1.4%
5 flights
Avg arrival delay
10 min
49 min when late
Rank on route
#1 of 2
route average 77% on time
Key facts
- Delta Air Lines flights on RDU to SEA arrived on time 83% of the time in Aug 2025 – Jul 2026.
- 1.4% were cancelled, and 4% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 77% on time overall.
- The largest source of delay minutes was airline (crew, maintenance, cleaning, fueling) (53%).
On-time trend by month
Why this airline's flights were late
- Airline (crew, maintenance, cleaning, fueling)53%
- Air traffic control & airport congestion44%
- Late-arriving aircraft2%
- Extreme weather1%
- Security0%
Other airlines on RDU to SEA
- Alaska Airlines74% on time · 14 min avg delay
Full RDU to SEA comparison →
Delta Air Lines on-time record across all routes →
364 Delta Air Lines flights tracked on this route; 5 cancelled, 4 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.