SEA to EWR flight delays & on-time performance
Nonstop flights from Seattle–Tacoma International Airport to Newark Liberty International Airport · 2,402 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at SEA or EWR right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Seattle (SEA) to Newark (EWR) arrived on time 82% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 1.9% were cancelled, and 7% arrived an hour or more late.
- United Airlines was the most punctual airline here (83% on time); Alaska Airlines was the least (82%).
- Departures scheduled around 6am did best (94% on time); around 3pm did worst (68%).
- Tuesday was the most reliable day to fly (88% on time) and Thursday the least (79%).
- The largest source of delay minutes was air traffic control & airport congestion (41%).
Which airline is most on time from SEA to EWR?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| United Airlines | 83% | 1.6% | 16 min | 8.4% | 996 |
| Alaska Airlines | 82% | 2.2% | 10 min | 5.6% | 1,268 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am94%285 flights
- 7am92%267 flights
- 8am82%250 flights
- 9am82%61 flights
- 10am71%261 flights
- 11am66%29 flights
- 12pm71%145 flights
- 1pm73%73 flights
- 2pm84%94 flights
- 3pm68%140 flights
- 9pm88%162 flights
- 10pm84%223 flights
- 11pm85%271 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday81%1.2% cancelled
- Tuesday88%2.2% cancelled
- Wednesday87%0.9% cancelled
- Thursday79%0.9% cancelled
- Friday81%2.1% cancelled
- Saturday81%2.7% cancelled
- Sunday81%3.6% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Air traffic control & airport congestion41%
- Airline (crew, maintenance, cleaning, fueling)30%
- Late-arriving aircraft23%
- Extreme weather6%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather68%
- Air traffic control & airport congestion23%
- Airline (crew, maintenance, cleaning, fueling)9%
- Security0%
SEA to EWR: common questions
- How often are SEA to EWR flights on time?
- 82% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Seattle to Newark cancelled?
- 1.9% of scheduled flights were cancelled (44 of 2,264).
- How long are typical delays?
- Across all flights the average arrival delay was 13 min (early arrivals count as zero). Flights that were late arrived 70 min behind schedule on average, and 6.8% of flights were an hour or more late.
- How long is taxi time at SEA?
- Flights on this route spent 22 min taxiing from the gate to takeoff on average.
Related routes
Return trip: EWR to SEA — 74% on time
More flights from Seattle
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: SEA → EWR, nonstop flights by US airlines that report to the DOT. How we calculate this.