Flight number record

F9 3206

Frontier Airlines · Denver to Houston

Route: DEN → IAH
Departs: 07:00
Flights: 315
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s F9 3206, check with Frontier Airlines.

F9 3206 earns an A+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 9 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 45 minutes. That rests on 315 flights, with a median arrival 15 minutes early.

Set against the rest of the country, F9 3206's record is 9 points better than the US average of 77.3%. That gap is worth roughly 89 fewer late arrivals for every thousand flights.

On time

86.2%

Arrivals under 15 minutes late, of 312 completed flights

Avg delay

44 min

Across delayed arrivals only, not all flights

Cancelled

0.63%

National rate is 1.89%

1 hour+ late

2.6%

National rate is 8.3%

These figures cover 315 flights between September 2025 and August 2026. The median arrival is 15 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

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Schedule

When F9 3206 flies

F9 3206 flies DEN to IAH without a single fixed slot. Its most common scheduled departure was 07:00, used on 138 of 315 flights.

Departs 07:00138 flights43.8%

Scale runs 0% to 100%.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and F9 3206 runs 3 points worse at 86.2%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

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Against the route

F9 3206 next to DEN to IAH

Every carrier on DEN to IAH combined arrived on time 79.6% of the time across 4,728 flights, so F9 3206 is 7 points ahead of it. Frontier flew 834 flights on the same city pair under all its flight numbers, including this one, and those ran 79.3% on time. Across its whole network Frontier Airlines managed 72.7%, which this flight beats by 14 points.

F9 3206 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
F9 3206thin sample	315	86.2%	44 min	0.63%	A+
All Frontier Airlines on DEN–IAH	834	79.3%	58 min	0.48%	B+
All carriers on DEN–IAH	4,728	79.6%	62 min	0.30%	B+
Frontier Airlines, whole network	213,022	72.7%	84 min	2.05%	C

Across the year

F9 3206 quarter by quarter

F9 3206 did not run the same all year. Its best quarter was Jul–Sep 2026 at 93.4% on time and its weakest Oct–Dec 2025 at 81.6%, a swing of 12 points on roughly 79 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202522 flights—
Oct–Dec 202587 flights81.6%
Jan–Mar 202658 flights89.5%
Apr–Jun 202686 flights82.4%
Jul–Sep 202662 flights93.4%

Scale runs 75% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, F9 3206 did best on Tuesday at 94.3% on time and worst on Friday at 78.8%. Each day rests on about 45 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late F9 3206 runs when it is late

F9 3206 often beats the schedule: 161 of 312 completed flights, 52%, arrived 15 minutes or more early. The 43 late arrivals split 17 under half an hour, 18 between 30 and 60 minutes, and 8 an hour or more.

15+ min early161 flights51.6%
Within 15 min108 flights34.6%
15–29 min late17 flights5.4%
30–59 min late18 flights5.8%
1–2 hours late6 flights1.9%
2+ hours late2 flights0.6%

Scale runs 0% to 100%.

Share of 312 completed flights by arrival against schedule.

10 of 34 late departures made up the time and arrived on time, 29% of them. In the other direction, 19 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at IAH.

The worst days

Worst days for F9 3206

The latest arrival of the period was on 30 November 2025, 2 hours 43 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).

The latest arrivals of F9 3206 in the period
Date	Arrived late by	Largest filed cause
30 November 2025	2 hours 43 minutes	Late-arriving aircraft
22 December 2025	2 hours 31 minutes	Carrier
13 March 2026	1 hour 47 minutes	Carrier
16 August 2026	1 hour 41 minutes	Carrier
8 November 2025	1 hour 9 minutes	National Airspace System

Delay causes

Why F9 3206 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 1,897 reported delay minutes.

Carrier
38%
National Airspace System
37%
Late-arriving aircraft
23%
Extreme weather
2%

37% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 693 minutes out of 1,897, against a national NAS share of 21%. The split is drawn from 1,897 delay minutes reported on F9 3206.

Cancellations are rare at 0.63%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.6% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 861 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.

Every one of the 315 flights under F9 3206 in the data flew DEN to IAH. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 315 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking F9 3206

For a booking, F9 3206 has one of the better records a US domestic flight can show: 86.2% on time and 0.63% cancelled. That is a base rate, not a promise about any single day.

Where to go next

A flight number here means Frontier Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures