Historical on-time performance
St. Louis to Newark
872 miData through May 2026Source: US DOT · BTS
Flights on STL–EWR arrive on time 79% of the time over the last 12 months.
On-time rate79%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled5.4%of scheduled flights
based on 938 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysOn-time79%Medianon timep9040 minCancel5.4%Flights938
Why flights run late
Delay causes
- Airline13%
- Weather4%
- Air traffic (NAS)38%
- Late aircraft45%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather59%
- Air traffic (NAS)41%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 51 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly STL → EWR
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 88% on time.
- Mornings88% on time · p90 10 min · 981 flights
- Middays80% on time · p90 30 min · 1,010 flights
- Evenings63% on time · p90 95 min · 918 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 71% to 81% on time.
- Saturdays81% on time · p90 40 min · 398 flights
- Wednesdays80% on time · p90 40 min · 432 flights
- Tuesdays78% on time · p90 40 min · 432 flights
- Thursdays78% on time · p90 65 min · 425 flights
- Fridays76% on time · p90 60 min · 434 flights
- Mondays76% on time · p90 55 min · 423 flights
- Sundays71% on time · p90 65 min · 429 flights
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