Historical on-time performance
Washington to Tampa
810 miData through Dec 2025Source: US DOT · BTS
Flights on IAD–TPA arrive on time 78% of the time over the last 12 months.
On-time rate78%arrived within 15 min
p90 delay40 min1 in 10 flights is worse (tail risk)
Cancelled0.2%of scheduled flights
based on 1,338 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.
- Frontier AirlinesOn-time81%Medianon timep9035 minCancel0.0%Flights31
- United AirlinesOn-time78%Medianon timep9040 minCancel0.2%Flights1,307
Why flights run late
Delay causes
- Airline18%
- Weather9%
- Air traffic (NAS)37%
- Late aircraft36%
- Security0%
Most delay minutes here are attributed to Air traffic (NAS).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly IAD → TPA
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 64% to 86% on time.
- Mornings86% on time · p90 20 min · 1,108 flights
- Middays85% on time · p90 25 min · 1,156 flights
- Overnights75% on time · p90 65 min · 154 flights · limited
- Evenings67% on time · p90 70 min · 1,183 flights
- Afternoons64% on time · p90 85 min · 152 flights · limited
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 · 515 flights
- Wednesdays82% on time · p90 30 min · 505 flights
- Saturdays81% on time · p90 35 min · 530 flights
- Mondays78% on time · p90 50 min · 554 flights
- Fridays76% on time · p90 50 min · 543 flights
- Thursdays75% on time · p90 45 min · 551 flights
- Sundays74% on time · p90 55 min · 555 flights
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