Seattle (SEA) to Raleigh/Durham (RDU) flights
Alaska Airlines, Delta Air Lines fly nonstop from Seattle-Tacoma International Airport to Raleigh-Durham International Airport, with about 21 flights a week in July 2026. The 2,354-mile flight takes about 4h 57m gate to gate.
- Distance
- 2,354 mi · 3,788 km
- Flight time
- 4h 57m
- Airlines
- 2
- Seats filled
- 84%
Airlines flying SEA to RDU
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Alaska Airlines | 14 | Boeing 737-900ER, Boeing 737 MAX 9, Boeing 737-800 | 83,382 | 4h 59m |
| Delta Air Lines | 7 | Boeing 737-800, Boeing 737-900ER, Airbus A321 | 48,273 | 4h 55m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SEA to RDU flight schedule
3 flight numbers flew this route in August 2026, 3 of them almost daily. The first usually leaves at 8:20am and the last at 9:33pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AS 572Alaska Airlines | 8:20am | 4:31pm | 31 | 85% |
| DL 489Delta Air Lines | 4:00pm | 11:59pm | 31 | 76% |
| AS 677Alaska Airlines | 9:33pm | 5:40am | 26 | 86% |
Is SEA to RDU on time?
From September 2025 to August 2026, 81% of 918 flights arrived within 15 minutes of schedule and 0.8% were cancelled. Flights leaving around 8am were the most punctual (86%), those around 4pm the least (74%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (42%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 554 | 85% | 7 min | 0.4% |
| Delta Air Lines | 364 | 77% | 13 min | 1.4% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 8am to 9am | 138 | 86% | |
| 9am to 10am | 190 | 84% | |
| 10am to 11am | 36 | 91% | |
| 3pm to 4pm | 265 | 78% | |
| 4pm to 5pm | 84 | 74% | |
| 9pm to 10pm | 127 | 85% | |
| 10pm to 11pm | 77 | 78% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 87 | 14,351 | |
| September 2025 | 77 | 11,385 | |
| October 2025 | 64 | 9,074 | |
| November 2025 | 66 | 8,449 | |
| December 2025 | 72 | 10,231 | |
| January 2026 | 62 | 7,875 | |
| February 2026 | 55 | 7,016 | |
| March 2026 | 70 | 10,183 | |
| April 2026 | 81 | 11,320 | |
| May 2026 | 94 | 13,007 | |
| June 2026 | 90 | 13,934 | |
| July 2026 | 93 | 14,991 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.