United Airlines EWR to SEA on-time performance
United Airlines nonstop flights from Newark to Seattle · Aug 2025 – Jul 2026
On-time arrivals
76%
arrived < 15 min late
Cancelled
1.5%
15 flights
Avg arrival delay
17 min
67 min when late
Rank on route
#1 of 2
route average 74% on time
Key facts
- United Airlines flights on EWR to SEA arrived on time 76% of the time in Aug 2025 – Jul 2026.
- 1.5% were cancelled, and 8% arrived an hour or more late.
- That ranks #1 of 2 airlines on this route, which averaged 74% on time overall.
- The largest source of delay minutes was air traffic control & airport congestion (36%).
On-time trend by month
Why this airline's flights were late
- Air traffic control & airport congestion36%
- Late-arriving aircraft35%
- Airline (crew, maintenance, cleaning, fueling)26%
- Extreme weather3%
- Security0%
Other airlines on EWR to SEA
- Alaska Airlines72% on time · 20 min avg delay
Full EWR to SEA comparison →
United Airlines on-time record across all routes →
996 United Airlines flights tracked on this route; 15 cancelled, 3 diverted.
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.