What's the Best Time of Day to Fly to Avoid Delays?

The best time of day to fly to avoid delays is early morning. Flights scheduled to leave between 5 and 7 a.m. arrive on time about 90–92% of the time, while flights leaving between 6 and 8 p.m. drop to roughly 67%. That pattern holds across 14.1 million US flights from June 2024 through May 2026, reported to the US DOT.

The short answer: fly before 8 a.m.

On-time rates are highest for the first bank of departures and fall steadily as the day goes on. Grouping every US departure by scheduled hour gives a clear curve:

• 5–7 a.m. — about 90–92% on time
• 8–10 a.m. — mid-to-high 80s
• Noon–2 p.m. — high 70s
• 6–8 p.m. — about 67–69%, the worst window of the day

The gap between a 6 a.m. and an 8 p.m. departure is roughly 24 percentage points — the difference between a flight that is almost always on time and one that is late one time in three.

Why delays pile up later in the day

Morning aircraft start the day parked at the gate, so there is nothing to make them late. As the day continues, a single late-arriving aircraft pushes back its next flight, and that delay ripples through every leg the plane flies. Weather and air-traffic congestion also build through the afternoon. We break the causes down in why flights are delayed.

How to use this on a real trip

Time of day is the single biggest lever you control. Before you book, check the most reliable major airports and your specific airport's page — some airports stay reliable later than others. It is also worth checking the best day of the week to fly.

Frequently asked questions

What is the single best hour to fly?

The 6 a.m. hour has the best record — about 92% of those departures arrive on time. The 5 a.m. hour is nearly identical.

Are red-eye and overnight flights on time?

Late-night departures (after 10 p.m.) recover somewhat versus the evening peak, but they never match the early-morning banks. If on-time arrival is the goal, morning still wins.

Does the best time to fly change by airport?

The shape is the same everywhere — mornings beat evenings — but the size of the gap varies. Look up your departure airport under airports to see its hourly pattern.