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Route Reliability

Newark → Seattle

EWR–SEA · 2,402 miles · Newark Liberty International Airport to Seattle–Tacoma International Airport

73
Usually Fine
WanderNerd Reliability Score
74%
Arrive within 15 minutes
8 min
Average arrival delay
2.1%
Cancelled
2,179
Flights in the data

Data through May 2026.

Who flies it best

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

  1. 1.United Airlines78%972 flights
  2. 2.Alaska Airlines70%1,207 flights

What the data says

Morning flights do better here.

EWR–SEA flights departing between 9 AM–12 PM arrived on time 86% of the time, versus 65% between 6–9 PM.

Sunday scaries are real for this one.

EWR–SEA flights arrived on time 77% of the time on Tuesdays. On Sundays: 70%.

United Airlines runs this route best.

United Airlines arrived on time 78% of the time on this route; Alaska Airlines managed 70%.

Ticking up lately.

EWR–SEA flights arrived on time 77% of the time over the last three months in the data, compared with 70% in the three months before that.

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
  • Mon74%(309 flights)
  • Tue77%(305 flights)
  • Wed75%(303 flights)
  • Thu75%(308 flights)
  • Fri73%(313 flights)
  • Sat72%(282 flights)
  • Sun70%(310 flights)
On-time by departure window
  • 6–9 AM79%(609 flights)
  • 9 AM–12 PM86%(215 flights)
  • 12–3 PM77%(51 flights)
  • 3–6 PM73%(675 flights)
  • 6–9 PM65%(580 flights)
On-time trend by month
88%
May

Jun 69% → May 88% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202569%168
July 202569%208
August 202578%227
September 202587%225
October 202574%201
November 202563%163
December 202549%174
January 202681%114
February 202681%95
March 202651%164
April 202692%178
May 202688%213

Same trip, other airports

Keep nerding

Based on 2,179 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.