Route
SEA → RDU
Seattle–Tacoma International Airport Raleigh-Durham International Airport
2,354 miles
Return route RDU → SEA →
How punctual is this route?
- On-time arrivals
- 81.4%
- Less than 15 minutes late
- Cancelled
- 0.8%
- Of scheduled flights
- Average delay when late
- 50 min
- Flights arriving 15+ minutes late
- Flights tracked
- 918
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 44%
- Late-arriving aircraft 29%
- Air traffic control & airport 25%
- Extreme weather 2%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 75.3% | 77 |
| October 2025 | 87.5% | 64 |
| November 2025 | 78.8% | 67 |
| December 2025 | 79.2% | 73 |
| January 2026 | 88.7% | 66 |
| February 2026 | 81.8% | 56 |
| March 2026 | 82.9% | 71 |
| April 2026 | 81.5% | 81 |
| May 2026 | 81.7% | 93 |
| June 2026 | 85.6% | 90 |
| July 2026 | 74.4% | 92 |
| August 2026 | 81.8% | 88 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 554 | 84.5% | 0.4% | 46 min |
| Delta Air Lines | 364 | 76.5% | 1.4% | 55 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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