STL to EWR flight delays & on-time performance
Nonstop flights from St. Louis Lambert International Airport to Newark Liberty International Airport · 872 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at STL or EWR right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from St. Louis (STL) to Newark (EWR) arrived on time 81% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 4.7% were cancelled, and 8% arrived an hour or more late.
- Republic Airways was the most punctual airline here (83% on time); United Airlines was the least (70%).
- Departures scheduled around 6am did best (94% on time); around 4pm did worst (71%).
- Wednesday was the most reliable day to fly (86% on time) and Sunday the least (78%).
- The largest source of delay minutes was late-arriving aircraft (43%).
Which airline is most on time from STL 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 |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 83% | 5.0% | 16 min | 7.3% | 917 |
| United Airlines | 70% | 2.5% | 28 min | 12.4% | 158 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 6am94%211 flights
- 7am88%169 flights
- 11am81%259 flights
- 12pm76%97 flights
- 4pm71%71 flights
- 5pm72%244 flights
- 6pm63%20 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday79%7.7% cancelled
- Tuesday81%5.1% cancelled
- Wednesday86%1.3% cancelled
- Thursday79%2.6% cancelled
- Friday84%3.1% cancelled
- Saturday81%7.2% cancelled
- Sunday78%5.9% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft43%
- Air traffic control & airport congestion41%
- Airline (crew, maintenance, cleaning, fueling)13%
- Extreme weather3%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather74%
- Air traffic control & airport congestion26%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
STL to EWR: common questions
- How often are STL to EWR flights on time?
- 81% 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 St. Louis to Newark cancelled?
- 4.7% of scheduled flights were cancelled (50 of 1,075).
- How long are typical delays?
- Across all flights the average arrival delay was 18 min (early arrivals count as zero). Flights that were late arrived 93 min behind schedule on average, and 8.0% of flights were an hour or more late.
- How long is taxi time at STL?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Return trip: EWR to STL — 84% on time
More flights from St. Louis
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: STL → EWR, nonstop flights by US airlines that report to the DOT. How we calculate this.