Historical on-time performance
Dallas to Boston
1,554 miData through May 2026Source: US DOT · BTS
Flights on DAL–BOS arrive on time 65% of the time over the last 12 months.
On-time rate65%arrived within 15 min
p90 delay60 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 122 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time65%Median5 minp9060 minCancel0.0%Flights122
Why flights run late
Delay causes
- Airline24%
- Weather4%
- Air traffic (NAS)50%
- Late aircraft22%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline8%
- Weather83%
- Air traffic (NAS)8%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 12 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 DAL → 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 — 86% on time.
- Mornings86% on time · p90 15 min · 111 flights · limited
- Middays53% on time · p90 85 min · 146 flights · limited
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