A cruise missile is a small unmanned aircraft on a one-way trip. A ballistic missile is a rocket that exits the atmosphere, coasts on an arc, and re-enters at hypersonic speed. The difference in flight profile shapes everything — propulsion, guidance, range, defence — and the line between the two is blurring as hypersonic glide vehicles arrive in service.
Browse missile profilesA cruise missile spends almost its entire flight inside the atmosphere under continuous power, with wings or fins generating lift. Its trajectory looks like an aircraft mission: climb, cruise at constant altitude (often very low to defeat radar), descend onto the target. Engines are usually turbojets or turbofans — the BGM-109 Tomahawk uses a Williams F107 turbofan producing 600 lbf and sips fuel at Mach 0.74.
A ballistic missile uses one or more rocket motors to boost to high velocity in the first 3–5 minutes of flight, then shuts down. The warhead bus coasts on a ballistic arc — partly or entirely exoatmospheric — and falls onto the target under gravity and atmospheric drag. The LGM-30G Minuteman III ICBM reaches apogee around 1,200 km altitude and re-enters its targets at roughly 7 km/s.
Subsonic cruise missiles need long-endurance air-breathing propulsion. The Tomahawk's Williams F107 burns JP-10 for 1,000+ nm. The Kh-101 uses a TRDD-50A turbofan for 2,500+ km. Supersonic cruise missiles graduate to ramjets — the BrahMos uses a liquid-fuel ramjet to reach Mach 2.8–3.0 in cruise. Hypersonic cruise missiles step up again to scramjets or to boost-glide architectures — the Russian 3M22 Zircon uses a scramjet for terminal cruise at Mach 8–9 after a solid booster.
Ballistic missiles use rocket motors, either liquid bipropellant or solid. Cold-war Soviet ICBMs ran on storable UDMH / N2O4 liquid propellants; the US went solid from Minuteman onward for the same readiness advantage that gives a silo or submarine launch in minutes from cold storage. The Trident II D5 SLBM uses three solid stages packaged inside the submarine launch tube; the Peacekeeper ICBM used three solid stages plus a liquid post-boost vehicle for MIRV deployment. Russia's Topol-M is a three-stage solid ICBM; the RS-28 Sarmat is a liquid-fuel heavy ICBM intended to deliver up to ten warheads or hypersonic glide vehicles.
Cruise missiles use layered guidance because they fly low and long. INS provides dead-reckoning, GPS adds absolute position when available, and two terrain-comparison techniques (TERCOM for mid-course, DSMAC for terminal) match radar or imagery against stored maps so the missile can navigate even with GPS jammed. Block IV Tomahawk and JASSM-ER add a two-way data link, allowing in-flight re-targeting from an E-3 or naval Tactical Tomahawk station. The MBDA Storm Shadow / SCALP-EG adds an IIR seeker for terminal aimpoint identification.
Ballistic missiles use INS plus star-tracker fixes during boost (correcting platform drift against known star positions) and rely on the predictability of the ballistic arc for accuracy. CEP figures for modern ICBMs are 90–200 m. To improve terminal accuracy and defeat defences, designers add a post-boost vehicle (PBV) that releases multiple independently-targetable warheads (MIRV) and decoys, and manoeuvring re-entry vehicles (MaRV) that adjust trajectory inside the atmosphere using fins or thrusters.
The asymmetry is severe. A Tomahawk gives a defender roughly 90 seconds of warning against a target 50 nm inland after it crosses the coastline at 100 ft. A Minuteman III warhead crosses the same 50 nm in about 7 seconds.
Cruise missile ranges run from 250 km (SCALP Naval) up to 2,500+ km (Kh-101, JASSM-XR). Ballistic missiles are categorised by range:
Hypersonic glide vehicles (HGVs) are launched on a ballistic rocket booster like an ICBM but, instead of coasting on a ballistic arc, they pull up and glide through the upper atmosphere at Mach 10–25, manoeuvring laterally over thousands of kilometres before terminal dive. The Russian Avangard is carried by an SS-19 or RS-28 Sarmat booster and glides at Mach 20+. China's DF-17 pairs a medium-range solid booster with the DF-ZF glide vehicle.
HGVs combine the speed of a ballistic warhead with the cross-range manoeuvring of a cruise missile. That defeats mid-course interceptors designed for predictable ballistic trajectories (Aegis BMD, Ground-based Midcourse Defense) while also flying too high and fast for terminal air-defence engagement until the very last seconds.
Cruise missiles are slow but they fly very low and small. Detection requires either look-down radar from AEW&C aircraft (E-3 Sentry, E-7 Wedgetail) or networked low-altitude radars. Engagement uses short-range surface-to-air missiles, gun systems (Phalanx CIWS, Pantsir), and fighter aircraft. The 2019 attack on Saudi Aramco's Abqaiq facility — using a mix of subsonic cruise missiles and loitering munitions — penetrated a multi-billion-dollar air-defence network undetected, illustrating the difficulty.
Ballistic threats are fast but predictable and bright (the boost-phase rocket plume and the re-entry heating). Defence happens in three phases. Boost-phase — almost no fielded systems (boost is too short, too far away). Mid-course — exoatmospheric kinetic interceptors: Ground-based Midcourse Defense (GMD) at Fort Greely and Vandenberg, US Navy Aegis BMD with the SM-3 family. Terminal — endoatmospheric: THAAD (high-altitude), the Israeli Arrow series including the Arrow exoatmospheric interceptor, and the MIM-104 Patriot PAC-3 against SRBMs.
Cruise missiles are theatre-conventional weapons, used in dozens of strikes per conflict. Strategic ballistic missiles have not been fired in anger; their value is deterrent posture. Tactical ballistic missiles like Iskander have been used extensively in recent conflicts because they sit in the gap — fast, hard to defend against, but conventionally armed and theatre-priced.
Missile specifications quoted are from publicly available US Department of Defense, CSIS Missile Threat, and manufacturer sources and reflect production or fielded variants as of 2026.