Airline · F9 · United StatesHow reliable is Frontier Airlines?
Frontier Airlines runs 79% on time across 1,037,127 flights of official airline-reported history. Here’s how it really performs — including when it’s late and on which routes.
Reliability score
on-time, cancellations & delays
Network reliability
Frontier Airlines’s on-time record across its whole network
Source: BTS TranStats · data through 2026-06-25. On-time and cancellations are airline-controllable (cause-attributed). Advisory context, not a guarantee for any one flight.
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When flights run late
It’s not just if Frontier Airlines is late — it’s how late
Of every 100 Frontier Airlines flights, how they actually land — on time, or in each lateness band. A short delay is a nuisance; a 2-hour delay misses connections.
Routes
Where Frontier Airlines shines — and where it struggles
Its most and least reliable routes by on-time rate (routes with a meaningful sample). Tap an airport for its full profile.
The read on Frontier Airlines
What the record actually tells you about flying Frontier Airlines
Frontier Airlines runs about 79% on time across 1,037,127 flights of official airline-controllable history — a solid, above-average on-time record. On cancellations, cancellations are rare here, at roughly 1.0%.
It's not just whether a flight is late, but how late. When Frontier Airlines runs behind, the typical delay lands around 18 minutes, and only a small slice — about 3.7% — slip two hours or more, so the worst-case tail is relatively contained.
Reliability isn't uniform across Frontier Airlines's map. Its strongest route in the data is MIA–BOS, running around 93% on time, while LAX–ATL is among its weakest at about 56%. That gap is the whole point: judge Frontier Airlines on the route you're actually flying, not on its overall average.
A track record is the backdrop, not a verdict on your flight. To put it to work, score your actual Frontier Airlines flight on reliability, weather, and connection safety, see how the PlaneSane Score works, and read are some airlines really more reliable and how to read on-time stats.
Common questions about Frontier Airlines
- How often is Frontier Airlines on time?
- Frontier Airlines (F9) ran about 79% on time across 1,037,127 flights of official airline-reported history — a solid, above-average on-time record. Its cancellation rate is roughly 1.0%.
- Is Frontier Airlines a reliable airline?
- On the numbers, Frontier Airlines has a solid, above-average on-time record. Typical delays run around 18 minutes when flights are late. Reliability varies by route and time of day, so check your specific flight rather than the brand average. It's advisory context, not a guarantee for any one flight.
- Which routes does Frontier Airlines fly most reliably?
- In our data, MIA–BOS is among Frontier Airlines's most reliable routes at about 93% on time, while LAX–ATL is among its weakest near 56%. The same airline can perform very differently route to route.
Flying Frontier Airlines?
Score your actual flight on reliability, weather, and connection safety before you book — Frontier Airlines’s track record is just the start.