Centennial Airport Radio Frequencies

Centennial Airport runs a full set of towered-field frequencies, from ATIS through approach control. Here's the full list, along with what each one is for.

Frequency Reference

What Each Frequency Is For

ATIS (120.3) broadcasts the current weather, active runway, and any relevant field notices on a continuous loop. Pick it up before you call anyone else so you're not asking ground or tower for information that's already available.

Clearance Delivery (128.6) is where IFR aircraft, and VFR aircraft picking up flight following or a squawk code, get their initial clearance before taxi. Not every flight needs it, but if you do, get it before calling ground.

Ground (121.8) handles taxi instructions to and from the runway, and coordination on the ramp side of the movement area. This is the frequency you'll spend the most time on before and after your actual flight.

Tower (118.9) controls the runways themselves: takeoff clearances, landing clearances, and traffic sequencing in the pattern and on final.

UNICOM (122.95) is the non-towered-style frequency used for FBO coordination and advisories, useful even at a towered field like KAPA for talking to ground handlers or requesting services.

Denver Approach/Departure (132.75) is the regional radar facility that hands you off from tower after departure, or hands you to tower on arrival. It covers the broader Denver terminal area beyond KAPA's own airspace.

Flight Service Station (122.2) connects you to a briefer in the air, useful for opening or closing a flight plan or getting an update en route.

A Typical Sequence

For a departure, most pilots at KAPA work through these frequencies in roughly the same order: listen to ATIS first, contact clearance delivery if you need one, switch to ground for taxi, then tower for takeoff, then out to Denver Approach/Departure once you're handed off. On arrival, that sequence runs in reverse, starting with Approach and ending with ground after you clear the runway. Knowing the order in advance keeps you from fumbling for the right frequency at a busy moment.

UNICOM and the Flight Service Station frequency sit slightly outside that main sequence. You'll use UNICOM as needed for FBO coordination rather than as a fixed step in every flight, and the Flight Service Station frequency only comes into play if you're operating on a filed flight plan that needs opening or closing in the air.

What a Typical Radio Call Sounds Like

Knowing the frequency is only half the job; knowing roughly what to say on it is the other half, especially for a pilot who doesn't fly into towered fields often. A departure from KAPA typically sounds something like this, in sequence: a call to ground for taxi ("Centennial Ground, Cessna one-two-three-four-five, at Modern Aviation, ready to taxi, information Bravo, request runway one-seven left"), a handoff to tower once you're at the hold short line ("Centennial Tower, Cessna one-two-three-four-five, holding short one-seven left, ready for departure"), and a check-in with Denver Approach after you're handed off ("Denver Approach, Cessna one-two-three-four-five, one thousand five hundred, climbing to three thousand five hundred"). None of this is unique to KAPA; it's the standard pattern at any towered field, but having the general shape of it in your head before you key the mic the first time makes the actual exchange faster and less stressful for everyone on the frequency.

A Common Snag: Missing the Handoff

This happens to instrument students and VFR transients alike often enough that it's worth walking through once. A pilot gets busy running a checklist, configuring for landing, or fielding a passenger question, and misses tower's instruction to contact Denver Approach or ground after clearing the runway. A few seconds go by in silence on a frequency where the pilot thinks they're still supposed to be listening, and nobody says anything because, from the controller's side, that aircraft has already been handed off and simply hasn't checked in yet.

The fix, when a pilot notices the silence feels off, is to go back to the last frequency they know for certain was correct and ask. Calling the last controller you talked to and saying, plainly, that you may have missed a frequency change, is a completely normal transmission and clears up the confusion in one exchange. It costs a few seconds of mild embarrassment and costs nothing else. The alternative, guessing at a new frequency and broadcasting blind on it, wastes more time and occasionally puts a transmission on a frequency where it doesn't belong.

If Something Doesn't Go as Planned

A short decision guide for the situations that come up most:

• If you're not sure you copied a frequency correctly, ask the controller to repeat it before you switch away; re-confirming costs seconds, guessing wrong costs minutes.
• If you switch to a new frequency and get no response after a reasonable try, go back to the last frequency that worked and ask where you should be.
• If you lose radio contact entirely (NORDO) inside the pattern, current light-gun signal procedures and standard lost-comm practices apply; review those before you fly if it's been a while since you've needed them.
• If ATIS audio is broken up or unreadable, don't guess at the runway or altimeter setting; call ground or tower directly and ask for the current information verbally.

This page also carries a decoded aviation forecast (TAF) for KAPA elsewhere on the page, updated from current data. That forecast tells you what the weather is expected to do; the frequency list here tells you who to talk to about it once you're airborne. The two are meant to be used together, not as substitutes for each other.

Why We Repeat the Warning

Airport frequencies change more often than most pilots expect, whether from equipment upgrades, airspace redesigns, or administrative changes at the facility. A frequency list on a website, even one that's accurate today, is a reference for orientation, not a legal substitute for the current Chart Supplement and NOTAMs you should be checking as part of any real preflight briefing.

Bottom line: Seven frequencies cover everything you need to talk to at KAPA, and the sequence you use them in barely changes from flight to flight. What does change is the actual frequency values themselves over time, so treat the numbers on this page the way you'd treat any other reference material: useful for orientation and for building the habit of the radio sequence, not a substitute for checking current data before you fly.