Historical on-time performance
Dallas to Harlingen
458 miData through May 2026Source: US DOT · BTS
Flights on DAL–HRL arrive on time 71% of the time over the last 12 months.
On-time rate71%arrived within 15 min
p90 delay45 min1 in 10 flights is worse (tail risk)
Cancelled0.9%of scheduled flights
based on 351 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Southwest AirlinesOn-time71%Medianon timep9045 minCancel0.9%Flights351
Why flights run late
Delay causes
- Airline25%
- Weather1%
- Air traffic (NAS)6%
- Late aircraft68%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather100%
- Air traffic (NAS)0%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 3 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 → HRL
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Middays are the most reliable time of day to fly this route — 80% on time.
- Middays80% on time · p90 25 min · 193 flights · limited
- Afternoons72% on time · p90 40 min · 549 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 61% to 80% on time.
- Tuesdays80% on time · p90 25 min · 107 flights · limited
- Thursdays76% on time · p90 45 min · 105 flights · limited
- Sundays75% on time · p90 35 min · 150 flights · limited
- Wednesdays74% on time · p90 35 min · 106 flights · limited
- Saturdays73% on time · p90 45 min · 175 flights · limited
- Mondays68% on time · p90 55 min · 104 flights · limited
- Fridays61% on time · p90 40 min · 106 flights · limited
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