Historical on-time performance
Washington to Newark
212 miData through May 2026Source: US DOT · BTS
Flights on IAD–EWR arrive on time 72% of the time over the last 12 months.
On-time rate72%arrived within 15 min
p90 delay65 min1 in 10 flights is worse (tail risk)
Cancelled2.2%of scheduled flights
based on 1,440 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time72%Medianon timep9065 minCancel2.2%Flights1,440
Why flights run late
Delay causes
- Airline19%
- Weather13%
- Air traffic (NAS)39%
- Late aircraft29%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline10%
- Weather84%
- Air traffic (NAS)6%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 31 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 IAD → 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 — 86% on time.
- Mornings86% on time · p90 20 min · 2,051 flights
- Middays70% on time · p90 75 min · 155 flights · limited
- Overnights68% on time · p90 80 min · 1,101 flights
- Evenings49% on time · p90 145 min · 1,076 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 69% to 75% on time.
- Wednesdays75% on time · p90 65 min · 646 flights
- Tuesdays74% on time · p90 45 min · 647 flights
- Saturdays72% on time · p90 65 min · 596 flights
- Mondays70% on time · p90 80 min · 645 flights
- Sundays70% on time · p90 90 min · 640 flights
- Fridays69% on time · p90 80 min · 645 flights
- Thursdays69% on time · p90 75 min · 644 flights
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