Historical on-time performance
Raleigh-durham to Boston
612 miData through May 2026Source: US DOT · BTS
Flights on RDU–BOS arrive on time 76% of the time over the last 12 months.
On-time rate76%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled2.1%of scheduled flights
based on 2,562 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysOn-time82%Medianon timep9040 minCancel0.0%Flights39
- Delta Air LinesbestOn-time78%Medianon timep9060 minCancel2.1%Flights1,438
- JetBlue AirwaysOn-time74%Medianon timep9055 minCancel2.3%Flights1,085
Why flights run late
Delay causes
- Airline20%
- Weather1%
- Air traffic (NAS)34%
- Late aircraft44%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline31%
- Weather42%
- Air traffic (NAS)27%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 55 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 RDU → BOS
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 — 89% on time.
- Mornings89% on time · p90 10 min · 3,039 flights
- Middays78% on time · p90 55 min · 2,336 flights
- Evenings71% on time · p90 85 min · 1,401 flights
- Afternoons65% on time · p90 95 min · 1,251 flights
- Overnights64% on time · p90 105 min · 756 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 74% to 81% on time.
- Wednesdays81% on time · p90 35 min · 1,207 flights
- Saturdays80% on time · p90 45 min · 1,012 flights
- Tuesdays79% on time · p90 50 min · 1,200 flights
- Thursdays77% on time · p90 65 min · 1,324 flights
- Mondays76% on time · p90 60 min · 1,356 flights
- Fridays75% on time · p90 65 min · 1,365 flights
- Sundays74% on time · p90 70 min · 1,319 flights
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