Route
EWR → SEA
Newark Liberty International Airport Seattle–Tacoma International Airport
How punctual is this route?
- On-time arrivals
- 72.9%
- Less than 15 minutes late
- Cancelled
- 2.4%
- Of scheduled flights
- Average delay when late
- 74 min
- Flights arriving 15+ minutes late
- Flights tracked
- 2,263
- Scheduled flights in the period
What caused the delays
- Air traffic control & airport 37%
- Late-arriving aircraft 32%
- Airline (crew, maintenance, cleaning) 19%
- Extreme weather 11%
- Security 1%
Share of delay minutes airlines attributed to each cause (BTS).
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 86.7% | 227 |
| October 2025 | 72.6% | 206 |
| November 2025 | 63.2% | 171 |
| December 2025 | 45.4% | 178 |
| January 2026 | 80.7% | 119 |
| February 2026 | 81.1% | 103 |
| March 2026 | 48.8% | 165 |
| April 2026 | 91.0% | 181 |
| May 2026 | 87.8% | 213 |
| June 2026 | 75.3% | 225 |
| July 2026 | 69.5% | 246 |
| August 2026 | 70.4% | 229 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Alaska Airlines | 1,273 | 71.6% | 2.8% | 75 min |
| United Airlines | 990 | 74.5% | 1.8% | 74 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
AS462
31% late · 347 flights
-
UA1330
22% late · 332 flights
-
AS299
25% late · 293 flights
-
AS280
20% late · 218 flights
-
UA2044
30% late · 197 flights
-
AS296
53% late · 139 flights
-
UA1796
44% late · 100 flights
-
AS230
17% late · 70 flights
-
AS356
31% late · 69 flights
-
UA1289
21% late · 62 flights
-
UA2403
13% late · 55 flights
-
UA2387
49% late · 47 flights
-
AS373
7% late · 41 flights
-
AS357
34% late · 35 flights
-
UA1741
26% late · 35 flights
-
UA1187
8% late · 24 flights
-
UA2374
8% late · 24 flights
-
UA1814
24% late · 21 flights
-
AS247
5% late · 20 flights
-
AS359
15% late · 20 flights
-
UA363
5% late · 20 flights
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