Historical on-time performance
Newark to San Francisco
2,565 miData through May 2026Source: US DOT · BTS
Flights on EWR–SFO arrive on time 69% of the time over the last 12 months.
On-time rate69%arrived within 15 min
p90 delay80 min1 in 10 flights is worse (tail risk)
Cancelled2.4%of scheduled flights
based on 4,362 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Alaska AirlinesbestOn-time74%Medianon timep9050 minCancel0.8%Flights609
- United AirlinesOn-time68%Medianon timep9085 minCancel2.7%Flights3,753
Why flights run late
Delay causes
- Airline35%
- Weather5%
- Air traffic (NAS)27%
- Late aircraft33%
- Security0%
Most delay minutes here are attributed to Airline.
When flights don't go
Why flights were cancelled
- Airline54%
- Weather39%
- Air traffic (NAS)7%
- Security0%
Most cancellations here are attributed to Airline. Shares are among 105 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 EWR → SFO
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 — 79% on time.
- Mornings79% on time · p90 40 min · 3,816 flights
- Middays75% on time · p90 65 min · 2,580 flights
- Afternoons73% on time · p90 75 min · 2,914 flights
- Evenings61% on time · p90 95 min · 2,365 flights
- Overnights58% on time · p90 105 min · 998 flights
Best day of week
Tuesdays are the most reliable day to fly this route — 78% on time.
- Tuesdays78% on time · p90 50 min · 1,807 flights
- Saturdays73% on time · p90 65 min · 1,710 flights
- Wednesdays73% on time · p90 55 min · 1,810 flights
- Mondays70% on time · p90 80 min · 1,836 flights
- Fridays70% on time · p90 75 min · 1,847 flights
- Thursdays69% on time · p90 80 min · 1,837 flights
- Sundays69% on time · p90 85 min · 1,826 flights
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