Historical on-time performance
Miami to St. Croix Island
1,139 miData through May 2026Source: US DOT · BTS
Flights on MIA–STX arrive on time 76% of the time over the last 12 months.
On-time rate76%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled0.4%of scheduled flights
based on 681 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- American AirlinesOn-time76%Medianon timep9050 minCancel0.4%Flights681
Why flights run late
Delay causes
- Airline36%
- Weather4%
- Air traffic (NAS)16%
- Late aircraft43%
- Security1%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather33%
- Air traffic (NAS)67%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). 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 MIA → STX
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 — 76% on time.
- Middays76% on time · p90 45 min · 1,606 flights
- Evenings63% on time · p90 55 min · 142 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 67% to 84% on time.
- Wednesdays84% on time · p90 25 min · 249 flights
- Tuesdays78% on time · p90 35 min · 249 flights
- Fridays77% on time · p90 40 min · 272 flights
- Thursdays76% on time · p90 50 min · 268 flights
- Mondays75% on time · p90 45 min · 269 flights
- Sundays70% on time · p90 55 min · 272 flights
- Saturdays67% on time · p90 45 min · 272 flights
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