About 1 in 3 F9 4978 flights from Houston arrived 15+ minutes late, diverted or cancelled over the past year (37%); 3.3% were cancelled. The typical flight landed 4 minutes early.
F9 4978: IAH → MCO
Scheduled to leave Houston at 7:23 p.m. local time. Over the past year it arrived on time 63% of the time (246 flights), worse than other F9 flights on the route at that hour (66%). Last seen in the data Aug 17, 2026.
Usually Frontier Airlines's last flight of the day from Houston to Orlando (73% of days). Frontier Airlines's last IAH–MCO flight was cancelled 3.3% of the time, against 0.5% for its earlier ones. If it's cancelled, the next Frontier Airlines flight is usually around 1:16 p.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 37 | 57% |
| Tuesday | 30 | 70% |
| Wednesday | 29 | 72% |
| Thursday | 39 | 79% |
| Friday | 39 | 64% |
| Saturday | 37 | 54% |
| Sunday | 35 | 43% |
Why it was late
All flights IAH → MCO · Connecting off F9 4978? Check the risk
Questions
How often is F9 4978 from IAH to MCO late?
Frontier Airlines 4978 from Houston, TX to Orlando, FL arrived 15 or more minutes late, was diverted or was cancelled on 37% of 246 scheduled flights between September 2025 and August 2026. 3.3% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Frontier Airlines for today's flight. Method.