Route · RDU → SEA · 2020–2025 BTS data
Raleigh/Durham to Seattle
The RDU–SEA corridor (Raleigh/Durham, NC → Seattle, WA) runs ahead of the national average, served by 3 carriers across roughly 2,354 miles.
Data updated 2026-06-13
- 83.9%
- On-time
- +4.9 pts
- vs US avg
- 64 min
- Delay when late
- 4,706
- Flights
Cancelled
0.9%
Best Month
Oct 2024 94%
Worst Month
Dec 2025 49%
Distance
2,354 mi
Carriers
3
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 73 | 37 | 1 | 1 | DL,AS |
| Nov 2025 | 66 | 10 | 1 | 0 | AS,DL |
| Oct 2025 | 65 | 11 | 1 | 0 | AS,DL |
| Sep 2025 | 77 | 5 | 0 | 2 | DL,AS |
| Aug 2025 | 88 | 20 | 3 | 0 | AS,DL |
| Jul 2025 | 93 | 27 | 0 | 0 | AS,DL |
| Jun 2025 | 90 | 19 | 0 | 0 | AS,DL |
| May 2025 | 93 | 16 | 0 | 1 | AS,DL |
| Apr 2025 | 68 | 10 | 0 | 0 | AS,DL |
| Mar 2025 | 62 | 9 | 1 | 0 | AS,DL |
| Feb 2025 | 52 | 11 | 1 | 0 | AS,DL |
| Jan 2025 | 60 | 11 | 0 | 0 | AS,DL |
| Dec 2024 | 75 | 14 | 0 | 0 | AS,DL |
| Nov 2024 | 58 | 6 | 0 | 0 | AS,DL |
| Oct 2024 | 62 | 4 | 0 | 0 | AS,DL |
| Sep 2024 | 90 | 16 | 0 | 1 | AS,DL |
| Aug 2024 | 93 | 20 | 0 | 1 | AS,DL |
| Jul 2024 | 93 | 15 | 2 | 0 | AS,DL |
| Jun 2024 | 90 | 33 | 0 | 0 | AS,DL |
| May 2024 | 86 | 28 | 0 | 0 | AS,DL |
| Apr 2024 | 67 | 20 | 0 | 2 | AS,DL |
| Mar 2024 | 62 | 13 | 0 | 0 | AS,DL |
| Feb 2024 | 56 | 6 | 0 | 0 | AS,DL |
| Jan 2024 | 59 | 10 | 6 | 0 | AS,DL |
Cancellation Rate
0.9%
16 of 1,778 flights
Diversion Rate
0.4%
8 of 1,778 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
RDU - Raleigh/Durham
Full on-time, delay-cause, and seasonal performance for Raleigh/Durham, NC.
Origin airport →SEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
Destination airport →Compare the two airports
See RDU and SEA side by side on delays, cancellations, and reliability.
Open comparison tool →Similar routes
Other BTS-tracked routes with comparable performance or trip length to RDU–SEA.
Routes with a similar on-time rate
What the Data Says About RDU to SEA
Bureau of Transportation Statistics records show Raleigh/Durham to Seattle (RDU to SEA) running a 83.9% on-time rate over 4,706 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 64.4 minutes. The 2,354-mile corridor is served by 3 carriers, and over the last 24 months 0.9% of 1,778 flights were cancelled, 0.4% diverted.
The monthly split is wide on this route: Oct 2024 posted the strongest performance at 94% on-time, while Dec 2025 came in at just 49% - a 44-point swing worth factoring into travel timing.
Frequently Asked Questions
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Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.