Ask an IFR Expert: LPV vs. ILS—Which Should You Fly in Low Weather?

This is a question that comes up a lot, and it’s a perfect example of how IFR technology gives us more options—but also more decisions to make. Let’s break it down.

LPV vs. ILS—The Basics

An ILS is the classic precision approach, with a localizer for lateral guidance and a glideslope for vertical guidance. It’s reliable, predictable, and widely used around the world.

An LPV (Localizer Performance with Vertical guidance) is a GPS-based approach using WAAS. It gives you precision-like vertical guidance and often lower minimums than older non-WAAS GPS approaches. LPVs can even match or beat ILS minimums in some cases.

Pilot Perspective

• Weather Minimums: Always check the published minima. If the LPV offers a lower minimum or better runway alignment than the ILS, it might be the safer option in low weather—but only if you and your aircraft are equipped and comfortable flying it.

• Familiarity: In high workload situations, some pilots find the ILS easier to fly simply because it’s familiar and predictable.

• Missed Approaches: LPV missed approaches can be more flexible, but always review the procedure. ILS missed approaches are well-established and widely flown.

ATC Perspective

From ATC’s point of view, LPV and ILS are largely interchangeable. However, they might favor an ILS in busy airspace because the procedure is predictable and familiar, helping with sequencing. In tricky, unfamiliar or challenging terrain, LPVs can sometimes offer safer vertical guidance.

What to Choose

Both LPV and ILS are highly capable precision approaches. Your choice should be guided by your equipment, training, familiarity, and current weather. LPV isn’t automatically “better” than an ILS—it’s another tool in your IFR toolbox. Always check your charts (and notes), know your aircraft, and communicate with ATC if you have a preference.

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Eric Radtke

It was his first airplane trip at age seven that made Eric decide to become a pilot. "While boarding the airplane, a flight attendant noticed my interest in the flight deck and urged me to go talk to the pilot. I give a lot of credit to that pilot for my career choice." Eric earned a bachelor’s degree in finance and went on to an airline career. He learned to fly at Sporty’s as part of the University of Cincinnati’s Professional Pilot Program, an initiative he later directed.Eric now manages Sporty’s media network including FlightTrainingCentral.com. In addition, Eric serves as a Captain in a Cincinnati-based corporate flight department.

Latest posts by Eric Radtke (see all)

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