Editing Flight plan (section)

===Airway or flight path===
{{Main|Flight path}}

Airway routing occurs along pre-defined pathways called [[flight path]]s. Airways can be thought of as three-dimensional highways for aircraft. In most land areas of the world, aircraft are required to fly airways between the departure and destination airports{{citation needed|date=April 2019}}. The rules governing airway routing cover altitude, airspeed, and requirements for entering and leaving the airway (see [[#SIDs and STARs|SIDs and STARs]]). Most airways are eight nautical miles (14 kilometers) wide, and the airway flight levels keep aircraft separated by at least 1000 vertical feet from aircraft on the flight level above and below. Airways usually intersect at Navaids, which designate the allowed points for changing from one airway to another. Airways have names consisting of one or more letters followed by one or more digits (e.g., V484 or UA419){{citation needed|date=April 2019}}.

The airway structure is divided into high and low altitudes. The low altitude airways in the U.S. which can be navigated using [[VHF omnidirectional range|VOR]] Navaids have names that start with the letter V, and are therefore called Victor Airways. They cover altitudes from approximately 1200 feet above ground level (AGL) to {{convert|17,999|ft|m|0}} above mean sea level (MSL). T routes are low altitude RNAV only routes which may or may not utilize VOR NAVAIDS.  The high altitude airways in the U.S. have names that start with the letter J and are called Jet Routes, or Q for Q routes.  Q routes in the U.S. are RNAV only high altitude airways, whereas J routes use VOR NAVAID's the same way V routes do. J & Q routes run from {{convert|18,000|ft|m|0}} to {{convert|45,000|ft|m|0}}. The altitude separating the low and high airway structures varies from country to country. For example, it is {{convert|19,500|ft|m|0}} in Switzerland, and {{convert|25,500|ft|m|0}} in Egypt.