Historical on-time performance
Phoenix to Boston
2,300 miData through Dec 2025Source: US DOT · BTS
Flights on PHX–BOS arrive on time 77% of the time over the last 12 months.
On-time rate77%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.6%of scheduled flights
based on 1,983 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
Too close to call — no single carrier is clearly more on-time here.
- Delta Air LinesOn-time78%Medianon timep9050 minCancel1.2%Flights322
- American AirlinesOn-time77%Medianon timep9040 minCancel0.5%Flights1,331
- JetBlue AirwaysOn-time77%Medianon timep9045 minCancel0.3%Flights330
Why flights run late
Delay causes
- Airline29%
- Weather0%
- Air traffic (NAS)25%
- Late aircraft46%
- Security0%
Most delay minutes here are attributed to Late aircraft.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly PHX → BOS
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 73% to 81% on time.
- Mornings81% on time · p90 30 min · 1,087 flights
- Evenings81% on time · p90 35 min · 200 flights
- Overnights79% on time · p90 40 min · 2,755 flights
- Middays75% on time · p90 45 min · 1,190 flights
- Afternoons73% on time · p90 55 min · 903 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 83% on time.
- Tuesdays83% on time · p90 30 min · 840 flights
- Saturdays82% on time · p90 30 min · 879 flights
- Wednesdays81% on time · p90 40 min · 844 flights
- Mondays78% on time · p90 45 min · 887 flights
- Sundays75% on time · p90 45 min · 910 flights
- Thursdays75% on time · p90 50 min · 894 flights
- Fridays74% on time · p90 55 min · 890 flights
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