Skip to content
WanderNerd
Check a flight

Route Reliability

Seattle → Raleigh–Durham

SEA–RDU · 2,354 miles · Seattle–Tacoma International Airport to Raleigh–Durham International Airport

81
Pretty Reliable
WanderNerd Reliability Score
78%
Arrive within 15 minutes
2 min
Average arrival delay
1.1%
Cancelled
919
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.Alaska Airlines79%555 flights
  2. 2.Delta Air Lines77%364 flights

What the data says

Morning-you made the right choice.

SEA–RDU flights departing between 9 AM–12 PM arrived on time 86% of the time, versus 69% between 9 PM–12 AM.

Mondays have been rough.

SEA–RDU flights arrived on time 85% of the time on Wednesdays and just 70% on Mondays. That gap is worth planning around.

Not much between Alaska Airlines and Delta Air Lines.

On this route they all land within 77% to 79% on time. Pick on schedule and price.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon70%(134 flights)
  • Tue83%(125 flights)
  • Wed85%(122 flights)
  • Thu79%(131 flights)
  • Fri76%(132 flights)
  • Sat77%(127 flights)
  • Sun77%(137 flights)
On-time by departure window
  • 6–9 AM80%(135 flights)
  • 9 AM–12 PM86%(227 flights)
  • 3–6 PM77%(344 flights)
  • 9 PM–12 AM69%(202 flights)
On-time trend by month
84%
May

Jun 73% → May 84% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202573%90
July 202563%92
August 202566%86
September 202575%77
October 202588%64
November 202579%66
December 202579%72
January 202689%62
February 202682%55
March 202683%70
April 202684%81
May 202684%93

Keep nerding

Based on 919 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.