Overfly has two modes. Simple shows one route, its distance and times, and whether the aircraft makes it. Flight Ops, switched on from the menu, adds everything below.
Type airport codes separated by a dash. ICAO or IATA both work, and each dash adds a leg. Codes that match more than one field open a picker rather than guessing.
A waypoint can also be a coordinate, mixed freely with codes — SFO-37 37N 122 23W-EGLL is a valid three-point route. Latitude comes first unless you mark the hemispheres, in which case either order reads correctly. Minutes and seconds are optional from the right.
A slash between codes at the same position means “try each of these here” — the route expands to one entry per alternative, so checking a tech stop or a different origin does not mean typing the whole route twice.
To change a route, click into it and type: Enter saves it in place, keeping its colour and schedule, and Esc puts it back. A code Overfly cannot place is picked out in the route itself. If you allow it, recent routes are remembered in this browser, one click each.
Distances are great circle, nautical miles first, with kilometres and statute miles alongside. Bearings are initial, not constant. Times appear in local with Zulu in brackets, and the computed table is editable — change a departure or an arrival, time or date, and every leg downstream recalculates.
Switch distances between nautical miles, statute miles and kilometres, and speeds between Mach, knots, mph and km/h. The clocks along the top show Zulu, your own time and three cities you choose.
Pick a type and Overfly measures every leg against its usable range: the book range, less the fuel reserve and any range given up to payload. Where a leg does not clear, you get candidate tech stops on the great circle instead of a red cross.
The reserve follows the rule you choose — NBAA IFR, FAA Part 91, FAA Part 121 or EASA — with the distance to your alternate. Set the passengers and their weight, and the range each 1,000 lb costs from your aircraft’s own payload-range chart. With the seasonal wind on, each leg is flown against the month’s average wind at your cruise level (NOAA, 1991–2020), which moves both the block times and the range check. Not in the list? Enter a custom type by name, range and reserve.
Add up to eight routes on one map. Each takes the next colour in the ramp, and past six the ramp repeats with a dash pattern rather than inventing a colour you cannot tell apart.
Natural Earth shows the whole world; azimuthal equidistant centres on the departure, so every distance and bearing from it is true. Scroll or pinch to zoom, drag to pan, and Fit brings the route back. The chips along the top turn the great circle, the range ring and the day and night line on and off, and ETOPS draws diversion rings round the alternates with the worst diversion on the route.
The range ring sits on the departure; click any airport on the route to move it there, as though refuelled. The cog beside the zoom buttons sets the map style — Overfly, Traditional or Satellite — and whether airports are labelled by ICAO or IATA code, city or name.
Export opens a printable route brief in a new tab — header figures, the map in your chosen style, the full schedule in local and Zulu, the route list and the range check — ready to save as a PDF. In Simple mode it is a shorter trip summary in local time.
Share copies a link that carries the chart: routes, aircraft, cruise setting, payload, reserve, wind, layers and any block times you edited. It is the address itself, so nothing is uploaded and the link keeps working with no account behind it. The map style and labels stay yours. Email opens a draft in your own mail app with the figures written out and that link at the bottom.
No airways, no SIDs or STARs. Every line here is a great circle.
No overflight permits, no fuel prices, no handling.
Block times assume your cruise setting in still air, or with the month’s average wind. They are estimates, not a flight plan.
Airport and runway data is OurAirports — 9,785 fields in this build. Coastlines and borders are Natural Earth, satellite imagery is NASA Blue Marble, and the seasonal winds are NOAA’s 1991–2020 averages.
Full attributionsFor reference and planning interest. Not for operational flight planning.
© 2026 Overfly.Flights · every route, properly drawn