Iran is preparing the integration of the Russian Su-35. Radar, missiles, electronic warfare: what the fighter changes when facing American air power.
Executive Summary
The arrival of the Sukhoi Su-35 represents the most significant modernization of Iranian fighter aviation in several decades. However, its operational status must be treated with caution. As of October 1, 2026, some reports claim that initial aircraft have reached Iran and are protected within hardened facilities. Other recent sources indicate that approximately 20 Su-35s destined for Tehran remain stored in Russia, awaiting infrastructure work at the Hamadan airbase. One thing is certain: Iran has purchased the Su-35 and is actively preparing its integration. With its N035 Irbis-E radar, long range, high maneuverability, and electronic warfare suites, the fighter represents a major technological leap compared to Iran’s F-14s, F-4s, and MiG-29s. It does not, however, give Iran air superiority over the United States. Above all, it increases the cost and complexity of any opposing air operation.
The Status of Iranian Su-35s Remains Difficult to Establish
The first crucial point is distinguishing between purchase orders, production, delivery, and operational readiness.
Iran officially acknowledged in January 2025 that it had purchased Sukhoi Su-35s from Russia. The exact quantity was never publicly disclosed by Tehran. However, leaked Russian industrial documents point to a program potentially reaching 48 aircraft, with deliveries spread between 2026 and 2028.
By the summer of 2026, several specialized defense publications indicated that roughly 20 aircraft intended for Iran had already been built in Komsomolsk-on-Amur. Their transfer was reportedly delayed by the state of Iranian base infrastructure, particularly at Shahid Nojeh Air Base near Hamadan.
Reports published in August subsequently claimed that the first delivered aircraft had been placed in protected underground facilities. Yet, no geolocated photographs, Iranian tail numbers, or official statements from Moscow or Tehran have publicly confirmed that a Su-35 squadron is fully operational.
This nuance is key: integration is underway, but its actual extent remains unknown.
The Su-35 Delivers a Technological Shift for Iranian Aviation
For the Islamic Republic of Iran Air Force (IRIAF), the shift is massive.
The bulk of its combat fleet still relies on airframes engineered between the 1960s and 1980s. FlightGlobal’s World Air Forces 2026 recorded 65 F-4 Phantom IIs, 41 F-14 Tomcats, 35 F-5Es, 21 Su-24s, and 18 MiG-29s prior to losses and force updates during combat operations in 2026.
Even with local modernizations, these airframes face major constraints: aging structures, engine availability issues, radar obsolescence, and the challenge of sourcing spare parts.
The Sukhoi Su-35 changes this equation.
Measuring 21.9 meters in length with a 14.7-meter wingspan, its maximum takeoff weight reaches 34.5 metric tons. Its twin 117S thrust-vectoring turbofans produce up to 142 kN each with afterburner. The aircraft reaches Mach 2.25 at altitude and features a service ceiling of around 18,000 meters.
Carrying 11.3 metric tons of internal fuel, Sukhoi claims a ferry range of 3,600 kilometers without refueling. The Su-35 can also carry up to 8 metric tons of ordnance across 12 external hardpoints.
For Iran, this endurance is almost as vital as its combat specs. It allows fighters to be redeployed quickly across a nation covering more than 1.6 million square kilometers.
The Irbis-E Radar Drives the Real Capability Leap
The single most consequential upgrade sits inside the nose cone.
The N035 Irbis-E radar of the Su-35 utilizes a passive electronically scanned array (PESA). While it lacks the AESA architecture found on newer Western radar suites, it generates exceptional power output.
United Aircraft Corporation claims air target detection out to 350 kilometers, with the ability to track 30 targets and simultaneously engage up to eight.
Real-world detection ranges naturally fluctuate based on the target’s radar cross-section, altitude, aspect angle, and the surrounding electromagnetic environment.
The Su-35 also features an OLS optoelectronic system capable, according to its manufacturer, of tracking air targets out to approximately 80 kilometers. This infrared search-and-track sensor offers a major tactical advantage: it can hunt for aircraft without emitting radar signals.
This dual radar-infrared suite provides the IRIAF with a search and interception capability incomparable to that of its legacy F-5s or early MiG-29s.
Integration Forces Iran to Build a New Operational Support Chain
Inducting the Su-35 is far more complex than simply replacing an F-14 on the flight line.
Iran must set up an entire maintenance pipeline, stock engines and spare parts, acquire diagnostic tools, install simulators, and source specialized support equipment for Russian weapons systems.
The delivery of Yak-130 jet trainers starting in 2023 fits directly into this effort. These advanced trainers help Iranian pilots transition to avionics architectures and cockpit layouts similar to those found in modern Russian fighters.
Technicians face a steep learning curve as well. A modern fighter platform yields true military utility only if it can sustain regular sortie generation. Availability rates will prove just as critical as delivery numbers.
Shahid Nojeh serves as a logical base for these operations. The facility temporarily hosted Russian military aircraft in 2016 and features runways suitable for heavy fighters. Satellite imagery has also revealed the construction of large new hardened shelters.
However, air combat operations in 2025 and 2026 served as a reminder of a harsh reality: an advanced fighter parked on the ground remains a vulnerable target. Iran must pair these aircraft with force dispersion, hardened shelters, integrated air defenses, and mobile logistics.
Electronic Warfare Functions as a Survivability Multiplier
Leaked Russian documents also link the Iranian agreement to Khibiny-M electronic warfare suits, citing 24 sets associated with the Su-35 program—though the final delivery status and software configuration in Iran cannot be independently verified.
The Khibiny platform belongs to a family of EW systems engineered to detect enemy radar emissions and complicate target acquisition or missile guidance.
This capability carries weight when confronting American air power.
The electronic warfare suite on the Su-35 does not render the jet invisible. However, it can significantly degrade enemy detection and targeting networks—especially when integrated with defensive maneuvering, chaff, flares, and ground-based air defense systems.
Its operational effectiveness will ultimately hinge on the specific export variant delivered, the threat library programming available, and Iran’s ability to update electronic warfare data in real time.
The Su-35 Alone Does Not Shift the Military Balance with Washington
In current geopolitics, this remains the central question.
Clashes between the United States and Iran escalated sharply again in September 2026, with US strikes targeting Iranian military infrastructure, radar installations, and air defense sites. Tehran responded with missile and drone strikes against several US installations across the region. As of October 1, indirect negotiations continue, but active confrontation persists.
In this environment, the Su-35 provides Tehran with a credible long-range interception capability. It can safeguard priority airspace, contest support assets, and force opponents to commit additional escort fighters, electronic warfare platforms, and SEAD assets to their strike packages.
However, its capabilities should not be overstated.
The Su-35 is not a stealth aircraft. When operating against American F-35s, F-22s, EW platforms, AWACS, tankers, and networked intelligence assets, it faces an environment where system-of-systems integration matters far more than individual airframe agility.
Weaponry presents another critical variable. The Irbis-E radar achieves its full potential only when paired with modern long-range air-to-air missiles. The exact composition of Iran’s weapon packages has not been made public.
The True Test Will Be Iran’s Ability to Build a Networked Defense
The Su-35 resolves a long-standing vulnerability for Iran: the absence of a modern heavy fighter capable of long-range intercepts with contemporary sensors.
Yet 20, 30, or even 48 aircraft do not single-handedly create a complete air defense architecture.
To prove decisive, Su-35s must ingest data from ground-based radar networks, coordinate seamlessly with surface-to-air missile batteries, operate over secure data links, carry modern BVR missiles, and maintain high mission-capable rates.
This is where the true transformation of the IRIAF will occur.
For the United States, the Su-35 does not eliminate the technological edge provided by stealth, data fusion, and networked operations. It does, however, introduce a capable threat that air planners can no longer ignore. Iran is steadily transitioning from a Cold War legacy fleet toward a modern interceptor force.
That shift will not come from the Su-35 operating in isolation. It depends entirely on Tehran’s ability to wire this Russian fighter into a cohesive Iranian air defense grid. That network—far more than thrust-vectoring airshow maneuvers—will determine the jet’s true military value.