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F-35 Lightning II vs J-20 Mighty Dragon: Complete Comparison (2026) | Comparison

The F-35 Lightning II is the world's most advanced multi-role stealth fighter with 1,000+ delivered across 18 nations. China's J-20 Mighty Dragon is a large stealth interceptor/air superiority fighter with ~250 produced. The F-35 leads in stealth, sensors, and allied interoperability. The J-20 has advantages in speed, range, and payload capacity.

F-35 Lightning II

F-35 Lightning II

US 5th-gen multi-role stealth fighter, most produced

Multi-role stealth operations, allied interoperability, and network-centric warfare

Score55%
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VS
JM

J-20 Mighty Dragon

China's 5th-gen stealth fighter by Chengdu

Air superiority and long-range interception in the Pacific theater

Score50%
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Quick Answer

AI Summary

The F-35 Lightning II is the world's most advanced multi-role stealth fighter with 1,000+ delivered across 18 nations. China's J-20 Mighty Dragon is a large stealth interceptor/air superiority fighter with ~250 produced. The F-35 leads in stealth, sensors, and allied interoperability. The J-20 has advantages in speed, range, and payload capacity.

Our Verdict

AI-assisted

The F-35 wins on stealth technology, sensor fusion, network warfare, and massive allied ecosystem. The J-20 is a formidable air superiority platform with longer range and faster speed, but its true stealth and sensor capabilities remain unproven against Western systems. The F-35's combat-proven track record and 18-nation alliance give it a decisive strategic advantage.

Community feedback

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F-35 Lightning II
7.9/10
J-20 Mighty Dragon
7.1/10
J
F-35 Lightning II

Choose F-35 Lightning II if

Best pick

Multi-role stealth operations, allied interoperability, and network-centric warfare

J

Choose J-20 Mighty Dragon if

Air superiority and long-range interception in the Pacific theater

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Key Differences at a Glance

  • Stealth:✓ F-35 Lightning II wins(World-leading (0.001m² RCS est.) vs Advanced but likely inferior)
  • Top Speed:✓ J-20 Mighty Dragon wins(Mach 2.0+ vs Mach 1.6)
  • Combat Radius:✓ J-20 Mighty Dragon wins(~1,100 km (estimated) vs ~770 km (internal fuel))
See all 8 differences

Key Facts & Figures

8 numeric metrics compared

MetricF-35 Lightning IIJ-20 Mighty DragonRatio
Top Speed(Mach)Mach 1.6Mach 2.0+
Combat Radius(km)770 km~1,100 km
Service Ceiling(ft)50,000 ft66,000 ft
Units Delivered1,000+~250
Operators18 nations1 (China)
Unit Cost(USD)$80M$100-120M (estimated)
Length(m)15.7 m20.5 m
Wingspan(m)10.7 m13.0 m

Sourced from publicly available data ·

Key Differences

8 attributes compared head-to-head

F-35 Lightning II
5F-35 Lightning II
F-35 Lightning II leads
JM
3J-20 Mighty Dragon
  • Stealth

    F-35 Lightning II

    World-leading (0.001m² RCS est.)(winner)

    J-20 Mighty Dragon

    Advanced but likely inferior

  • Top Speed

    F-35 Lightning II

    Mach 1.6

    J-20 Mighty Dragon

    Mach 2.0+(winner)

  • Combat Radius

    F-35 Lightning II

    ~770 km (internal fuel)

    J-20 Mighty Dragon

    ~1,100 km (estimated)(winner)

  • Units Produced

    F-35 Lightning II

    1,000+(winner)

    J-20 Mighty Dragon

    ~250

  • Allied Operators

    F-35 Lightning II

    18 nations(winner)

    J-20 Mighty Dragon

    China only

  • Combat Record

    F-35 Lightning II

    Proven in multiple conflicts(winner)

    J-20 Mighty Dragon

    None

  • Sensor Fusion

    F-35 Lightning II

    Best in class (DAS + EOTS + APG-81)(winner)

    J-20 Mighty Dragon

    Unknown capability

  • Internal Payload

    F-35 Lightning II

    ~2,500 kg

    J-20 Mighty Dragon

    ~4,000 kg (estimated)(winner)

Full Comparison

F-35 Lightning II
JJ-20 Mighty Dragon
Stealth (RCS)
~0.001 m² (estimated)
Unknown (likely 0.01-0.1 m²)
Top Speed(Mach)
Mach 1.6
Mach 2.0+
Service Ceiling(ft)
50,000 ft
66,000 ft
Combat Radius(km)
770 km
~1,100 km
Internal Weapons
4x AIM-120 + 2x AIM-9X
6x PL-15 (estimated)
Units Delivered
1,000+
~250
Operators
18 nations
1 (China)
Unit Cost(USD)
$80M
$100-120M (estimated)
Length(m)
15.7 m
20.5 m
Wingspan(m)
10.7 m
13.0 m

Pros & Cons

12 pros·11 cons across both

F-35 Lightning II
JM
F-35 Lightning II

F-35 Lightning II

+6-5

Pros

  • World-leading stealth design
  • Unmatched sensor fusion (AN/APG-81 + DAS + EOTS)
  • 1,000+ delivered to 18 nations
  • Combat-proven in multiple conflicts
  • Three variants (A/B/C) for any mission
  • MADL secure datalink with allies

Cons

  • Mach 1.6 top speed (slower than J-20)
  • Single engine
  • Shorter combat radius than J-20
  • High sustainment costs
  • Cannot supercruise
JM

J-20 Mighty Dragon

+6-6

Pros

  • Mach 2.0+ top speed
  • Long combat radius (~1,100 km)
  • Large internal weapons bays
  • Twin WS-15 engines (newer variants)
  • ~250 produced and growing fast
  • Designed for anti-access/area denial

Cons

  • Stealth likely inferior to F-35
  • No combat record
  • Engine reliability questions (WS-15 still maturing)
  • No allied operators
  • Limited sensor fusion data available
  • No carrier variant operational

Frequently Asked Questions

6 questions

  1. In raw flight performance (speed, range, ceiling), the J-20 has advantages due to its larger size and twin engines. However, the F-35's stealth, sensor fusion, and proven combat capability make it the more effective overall weapons system. Air combat in 2026 is decided by who detects first, not who flies fastest.

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