Modern Aviation runs the largest FBO at Centennial Airport (KAPA), and it isn't a close contest. The company finished a $23 million expansion here in March 2023 that doubled the size of its old facility: a new Class A terminal, two heated hangars totaling more than 52,000 square feet, and roughly 150,000 square feet of fresh ramp. Land a Citation or a Global 7500 here and you'll notice the difference from a typical GA FBO right away. The ramp has room to breathe, and that matters at an airport where weekend ramp congestion is a real thing.
The campus sits at 8201 South Interport Boulevard on the airport's south side, open 24 hours a day, every day. That schedule counts for something at KAPA, where a lot of charter and corporate traffic moves through overnight and on weekends when smaller operators are running skeleton crews. Between the terminal size, the hangar capacity, and the ramp space, Modern Aviation has become the default stop for a good share of transient jet traffic through the Denver area, and it shows up near the top of pilot surveys for the Rocky Mountain region on a regular basis.
What They Offer
The 7,000 square foot terminal reads more like a small corporate lobby than a typical FBO counter: quiet lounge seating, a flight planning room, and conference rooms for crews or passengers who need to take a call before wheels up. Line service covers what you'd expect: Jet A, 100LL, and UL94 fuel, lav and water service, aircraft marshaling, and de-ice in winter (and a Denver winter can turn a routine ground stop into an hour-long wait if you haven't planned for it).
What Line Service Actually Covers
"Line service" is the catch-all term for everything that happens on the ramp before and after your engines are running, and it's worth spelling out what's baked into that word at a facility this size. A line crew member marshals you into a parking spot, sets chocks and cones, and coordinates fueling before you've had a chance to open the cabin door. At a full-service FBO like Modern, that same crew handles lav and water service, arranges a rental car or catering if you call ahead, and can bring out a ground power unit if the aircraft needs external power while systems are down for a turn. The economics behind full-service fueling reflect that labor: you're paying not just for the fuel itself but for a crew standing by around the clock to marshal, fuel, and service the aircraft on your schedule rather than a self-serve pump you handle yourself. That distinction matters more at a field like KAPA, where a good share of traffic is corporate and charter operators who need an aircraft turned quickly and don't have time to hunt down a self-serve island on the far side of the field.
| Fueling Model | What's Included | Typical User |
|---|---|---|
| Full-service (attended) | Marshaling, fueling, lav/water service, ground power on request | Corporate and charter aircraft on a tight schedule |
| Self-serve (where available elsewhere on the field) | Pilot-operated pump, no line crew involvement | Budget-conscious GA pilots making a routine fuel stop |
Modern runs as a full-service operation across the board, so line crew involvement, and the labor cost baked into the fuel price, is part of what you're paying for whether you use every piece of it or not. For a flight department, that's usually a fair trade for turnaround speed. For an owner-flown piston aircraft topping off on a weekend trip, it's worth knowing your fuel bill reflects that service model even on a routine stop.
Ramp & Hangar Space
The two heated hangars run past 52,000 square feet combined, with door height and depth enough for a Gulfstream G650 or a Bombardier Global 6000 without having to shuffle other aircraft to make room. About 4,000 square feet of attached office space gives based operators and charter companies a place to actually set up shop instead of working out of a rental car in the parking lot. The new ramp, roughly 150,000 square feet, is what solves KAPA's busiest-weekend problem: during ski season and big Denver events, ramp space at some FBOs backs up fast. Modern's rarely feels tight, even on a Friday afternoon in January.
Getting There
Interport Boulevard is on the airport's southeast side, a short taxi from Runway 17L/35R, KAPA's long runway at 10,001 feet, which handles most of the jet traffic anyway. Ground transportation to the Denver Tech Center or downtown Denver runs 25 to 40 minutes depending on traffic on I-25, longer during rush hour.
Even with all that ramp space, call ahead if you're inbound on a Friday afternoon during ski season. Mountain-bound GA traffic stages through KAPA hard on winter weekends, and every FBO on the field fills up faster than you'd expect. A ten-minute phone call the day before saves you an awkward hold on the ramp frequency.
Who Ends Up Here
We see everything from single-pilot turboprops to heavy-iron corporate jets parked on this ramp, plus a fair amount of charter traffic that uses Modern as a base while picking up Denver-area passengers. If you need hangar space for anything up to a G650-class aircraft, this is one of the few spots at KAPA that can actually fit you without a waitlist conversation.
Matching Your Trip to the Ramp
If you're flying a large-cabin jet that needs heated hangar space overnight, call ahead before you land rather than assuming a bay will be open; the two hangars fill up during ski season and around major Denver events. If you're transient GA passing through for a fuel stop or an overnight, the 24/7 line service covers you without any advance arrangement, and the ramp footprint here means you're unlikely to get parked in a back corner far from the terminal. If your trip involves an international arrival, on-field Customs availability means you can plan a straight-through arrival instead of routing through a different airport first to clear. And if you're simply weighing Modern against one of KAPA's other FBOs, the deciding factor is usually aircraft size and how much ramp room you actually need, not fuel brand or price.
Bottom Line
Modern Aviation is the pick at KAPA when the aircraft is big, the schedule is tight, or the timing falls outside normal business hours. Smaller GA traffic gets treated well here too, but the facility is sized and staffed around heavy corporate and charter operations, and that's where it earns its reputation on the field.