Best Time to Fly EWR to STL: On-Time Stats by Hour & Airline
Newark Liberty International → St Louis Lambert International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 83.5% of Newark (EWR) to St. Louis (STL) flights arrived on time (1,074 scheduled flights). That is 5.9 points above the national average of 77.6%.
Among 2 airlines, Republic Airways led with 86.4% on time and United Airlines was last with 67.1%.
Over 24 months, Tuesday was the most reliable day (85% on time) and August the worst month (72%).
The cancellation rate was 4.8% (US average 1.8%).
EWR to STL on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airways | 86.4% | 65 min | 4.9% | 915 |
| United Airlines | 67.1% | 68 min | 4.4% | 159 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly EWR to STL
On-time arrival % by scheduled departure hour (local time), 2,053 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 87.7% | 2.5% | 242 |
| 9am–10am | 91.4% | 2.3% | 429 |
| 10am–11am | Limited data | 22 | |
| 1pm–2pm | Limited data | 8 | |
| 2pm–3pm | 82.7% | 2.2% | 492 |
| 3pm–4pm | 88.6% | 8.1% | 124 |
| 4pm–5pm | Limited data | 3 | |
| 5pm–6pm | Limited data | 19 | |
| 6pm–7pm | Limited data | 15 | |
| 7pm–8pm | 66.7% | 0.0% | 33 |
| 8pm–9pm | Limited data | 25 | |
| 9pm–10pm | 73.6% | 9.0% | 547 |
| 10pm–11pm | 61.6% | 8.5% | 94 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on EWR to STL
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 76.3% | -8.3 pts | 0.0% | 38 |
| Christmas & New Year (Dec 20 - Jan 3) | 79.6% | -5.0 pts | 3.6% | 56 |
| Summer peak (Jun 15 - Aug 15) | 69.6% | -15.0 pts | 8.4% | 367 |
| All other days | 84.6% | — | 4.2% | 1,592 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).