The VFR Flight Plan, the Overdue Aircraft Report, and the SAR Clock That Starts Running the Moment You Land Without Closing It

A VFR flight plan is not an ATC clearance - it’s the foundational layer of the United States search and rescue system for general aviation. Filing before departure and closing upon arrival are both legally required under FAR 91.153. If you don’t close within 30 minutes of your estimated arrival time, Flight Service initiates a search and rescue response that can escalate to Civil Air Patrol activation and active aircraft dispatch.

What Is a VFR Flight Plan - and What It Isn’t?

When you file a VFR flight plan, you are not asking for permission. ATC doesn’t see it. There’s no associated transponder squawk, and no one is tracking you on radar to confirm you arrived. What you’re doing is telling the system exactly where you’re going and precisely when to start worrying if they don’t hear back.

Think of it like leaving a note before a long hike: nobody follows you into the woods, but if you’re not back when you said you’d be, someone knows to come looking - and which trail to check. That framing changes how seriously you take your obligation when you land.

What Does FAR 91.153 Actually Require?

Under FAR 91.153, a VFR flight plan requires:

• Aircraft identification, type, and special equipment
• True airspeed
• Departure point and proposed departure time
• Cruising altitude and route of flight
• Destination airport
• Estimated time en route
• Fuel on board (in hours and minutes)
• Any alternate airport
• Number of souls on board
• Pilot name and contact number

The regulation requires activating the flight plan with an air traffic facility upon or before departure. When you file through 1800wxbrief.com, ForeFlight, or by phone at 1-800-992-7433, you specify a proposed departure time and the system marks it active at that time. If your actual departure differs significantly from your filed time, update before wheels up.

The regulation also states you are required - not advised, not encouraged, required - to close your VFR flight plan with an FAA Flight Service Station upon completing the flight.

What Happens If You Don’t Close Your VFR Flight Plan?

Consider this scenario. A pilot lands, finds fuel, settles into the FBO, pours a cup of coffee. He never closed his flight plan. Thirty minutes later, an FAA Flight Service specialist is calling his destination airport, trying his cell phone, and entering his tail number into the notification system. Then she calls his emergency contact. His wife answers. Her voice goes tight before the specialist finishes her second sentence.

Meanwhile, the pilot is on his second cup of coffee, reading a two-year-old aviation magazine, completely unaware of what’s happening at the kitchen table twenty miles away.

This plays out hundreds of times a year. Most end with an awkward phone call and a sheepish pilot. Some don’t.

The SAR escalation moves in three defined stages:

Stage 1 - INREQ (Information Request): If you don’t close your flight plan within 30 minutes of your estimated time of arrival, Flight Service initiates an information request. They call the destination airport, check with approach control in the area, and work through every contact number on the flight plan - including your emergency contact.

Stage 2 - ALNOT (Alert Notice): If the INREQ turns up nothing, the situation escalates to an alert notice. That notification goes to search and rescue facilities across the affected area. Civil Air Patrol units begin assessing readiness. The Coast Guard is flagged in coastal regions. Military assets may be involved depending on location and circumstances.

Stage 3 - Active SAR: Aircraft and personnel are dispatched to fly your filed route and look for signs of a downed aircraft.

Each step has real costs - money, yes, but more critically, trained volunteer time pulled away from everything else. A Civil Air Patrol crew that drives to their base airport at midnight and pre-flights a Cessna 172 to go look for you is unavailable for any other emergency during that window.

Why a VFR Flight Plan Can Be the Difference Between Hours and Days

Radar coverage in the United States is incomplete, especially at low altitudes. Valleys, mountain passes, remote stretches of the Great Plains and desert Southwest, and large portions of Alaska sit in coverage gaps. ADS-B Out coverage is improving, but it still doesn’t reach every area at the altitudes most training flights operate.

If you go down in one of those gaps with a VFR flight plan on file, searchers know your route, your aircraft type and color, and your fuel state - which defines the maximum distance you could have flown before the tanks ran dry. They know where to look.

Without a flight plan, they know you’re somewhere between your departure point and somewhere. That is a very large haystack.

The NTSB has documented cases where a VFR flight plan - or the absence of one - directly affected the search timeline. Plans on file have put Civil Air Patrol crews over crash sites within hours of a missed arrival. The absence of a flight plan has meant families waited days just to confirm which route a pilot had been flying.

Why Your Fuel-on-Board Number Must Be Accurate

The fuel-on-board field deserves special attention. Enter it honestly, in hours and minutes. If you have four hours and twenty minutes of usable fuel, write 4+20. Don’t round up because it looks better.

During an active SAR, that number defines the radius searchers need to cover. An inflated fuel figure could send aircraft past where you actually came down. Accuracy here is a safety input, not a bureaucratic formality.

How to File a VFR Flight Plan

File before you depart. Three options:

• Online: File through 1800wxbrief.com (the Leidos Flight Service website) or through ForeFlight
• Phone: Call 1-800-992-7433 - the call takes about three minutes
• Work it into your runup checklist so it becomes habit, not an afterthought

How to Close a VFR Flight Plan

Close it before you do anything else after landing. Before you put the headset away. Before you walk to the FBO. Before you check your messages. Close it first.

By radio: Contact Flight Service on 122.2, the universal Flight Service frequency. Give your tail number, departure point, destination, and state that you want to close your VFR flight plan. The whole exchange takes about twenty seconds.

By phone: Call 1-800-992-7433. Save this number in your phone now, not after the next flight.

By app: Both ForeFlight and the Leidos website allow closure in two taps with an active connection.

If you can’t raise Flight Service on the radio due to terrain or antenna issues - which happens, especially at lower elevations - use the phone. There is always a way to close a flight plan. There is no legitimate excuse for not doing it.

How Multi-Stop Cross-Countries Work With Flight Plans

Each leg of a multi-stop trip requires its own flight plan. File a plan from your departure to your first stop, close it when you land, and file a new plan before departing for the next leg.

If you file a single plan for a long trip with an intermediate fuel stop and don’t update it, your estimated arrival time will expire against the first stop - not your final destination. The SAR clock starts running at the wrong airport. File each leg independently.

How a VFR Flight Plan Fits With Your Other Safety Tools

Your safety tools form concentric rings around the flight:

• VFR flight plan - the widest ring. Covers your entire planned route with intent, altitude, and timing before you even start the engine. No coverage dependency. No mechanical failure mode.
• Radar and ADS-B - the next ring. Provides position data where coverage exists.
• ELT (Emergency Locator Transmitter) - the innermost ring. Required under FAR 91.207 in most general aviation aircraft; activates on impact.

None of the inner rings replicate what the flight plan does: communicate intent. If your transponder drops off radar and no flight plan is on file, the system knows you disappeared. It doesn’t know where you were headed. Those are very different problems to hand a search coordinator.

The flight plan is the ring that costs five minutes and has no failure mode. It depends entirely on two actions: filing before you go, and closing when you land.

How This Appears on the Checkride

The ACS requires demonstrated understanding of VFR flight plan requirements, including filing, activating, and closing. Examiners are reading for depth.

A student who says “you have to close it or search and rescue might start” is showing surface knowledge. A student who can explain the INREQ and ALNOT escalation, describe how the fuel-on-board figure creates a searchable radius, and articulate that the flight plan communicates intent rather than position - that student is showing a different level of thinking. Know the mechanism, not just the rule.

Key Takeaways

• A VFR flight plan is not an ATC clearance - it is the triggering mechanism for general aviation search and rescue, and closing it upon landing is legally required under FAR 91.153
• Failing to close within 30 minutes of your estimated arrival time initiates an INREQ; from there it escalates to an ALNOT and potentially active SAR with aircraft and personnel dispatched
• Your fuel-on-board figure must be accurate - searchers use it to define the radius they need to cover; rounding up wastes search resources and could send crews past your actual position
• Multi-leg cross-countries require a separate flight plan per leg, each filed and closed independently
• The universal Flight Service frequency is 122.2; the phone number is 1-800-992-7433 - add it to your phone before your next flight