Route
RDU → SEA
Raleigh-Durham International Airport Seattle–Tacoma International Airport
2,354 miles
Return route SEA → RDU →
How punctual is this route?
- On-time arrivals
- 78.0%
- Less than 15 minutes late
- Cancelled
- 1.2%
- Of scheduled flights
- Average delay when late
- 57 min
- Flights arriving 15+ minutes late
- Flights tracked
- 918
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 37%
- Air traffic control & airport 34%
- Late-arriving aircraft 27%
- Extreme weather 1%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Aug 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 93.3% | 77 |
| October 2025 | 82.8% | 65 |
| November 2025 | 84.6% | 66 |
| December 2025 | 47.9% | 73 |
| January 2026 | 76.2% | 67 |
| February 2026 | 75.5% | 56 |
| March 2026 | 67.6% | 70 |
| April 2026 | 87.7% | 81 |
| May 2026 | 72.5% | 93 |
| June 2026 | 75.6% | 90 |
| July 2026 | 84.8% | 92 |
| August 2026 | 84.1% | 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 | 74.9% | 1.1% | 57 min |
| Delta Air Lines | 364 | 82.8% | 1.4% | 57 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
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