‹ London to Sydney

Via Hong Kong

Limited 53 /100

London → Sydney

Goes through a warning area

Route assessed 2h ago

17,600 km · 21h 5m

This routing flies about 580 km further than the straight line between these cities, roughly 42m longer. How we work this out

This trip crosses one of the 19 airspace warning areas we track, and no volcanic ash advisory covers its airports.

Iranian Airspace Advisory · Closed to overflights
Weak reroute options · via Hong Kong · ~21h 5m
Why this score
Airspace High
Detour Moderate
Backups Weak
Hub Strong
Airlines Strong
Why book

The London to Sydney routing via Hong Kong crosses a warning area in Iranian airspace. Verify current conditions and check with your airline before booking, as this may affect your journey time or routing.

The catch

Part of this route goes through a flight warning area

Worth knowing

Monitor the Iranian airspace advisory before travel. Confirm with your airline whether it affects your specific flight or if a reroute is planned.

Limited 53

London → Sydney

↓ route details
How it's scored ↓
Route strength 57

Other paths · Stop quality

Conditions now 48

Airspace warnings · Flight options

This routing encounters more airspace disruption than some alternatives on the London to Sydney corridor. Other paths via different hubs may avoid the warning area entirely, though they often add flight time.

  • London to Hong Kong first leg (~12h) uses Central Asian routing. Cathay Pacific has maintained consistent service on this route since 2022.
  • Hong Kong to Sydney second leg (~9h) routes southeast via Pacific — clean, uncomplicated sector.
  • This corridor completely avoids the Middle East advisory zone on both legs. Useful if regional escalation makes Gulf exposure unacceptable.
  • Total journey is approximately 22–23 hours including transit — the longest of the main three options.
  • Hong Kong remains a capable long-haul hub. Cathay Pacific has demonstrated reliable London to Hong Kong connectivity throughout the post-2022 period.
Airspace Some

The stored corridor for Via Hong Kong enters Iranian Airspace Advisory at one point along its path, measured against the zone outline on September 5, 2026.

Iranian Airspace Advisory · Closed to overflights

Official notice: EASA CZIB-2026-04-R2 ↗

Latest revision dated 30 Sep 2026

Not yet verified against the notice

Automatic check ran 2h ago

The search shows all flights from London to Sydney. For this route, look for a flight connecting in Hong Kong.

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Other options for this trip

Via Singapore 66
Via Dubai 55

Scores are based on EASA and FAA notices and monitoring sources, added flight time, and how many reroute options exist. This is not a safety rating. Always check with your airline before you book.

For reference only · Verify before booking.

How we score routes →
All routes from London → All routes to Sydney → Iranian Airspace Advisory zone →
← All options

The search shows all flights from London to Sydney. For this route, look for a flight connecting in Hong Kong.

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