Via Hong Kong

Flowing 79 /100

London → Sydney

No warning areas on this flight path

17,600 km · 21h 5min

Weak reroute options · via Hong Kong · ~21h 5m

Route assessed 37m ago

Why book

Cleanest airspace on both legs if Gulf avoidance is the priority. LHR–HKG via Central Asia; HKG–SYD clean southerly routing. Longest option but zero Gulf involvement.

The catch

Very few backup paths if this route is disrupted

Worth knowing

London to Hong Kong first leg runs through the most congested section of the Central Asian corridor. Eurocontrol air traffic delays affect outbound Heathrow capacity more frequently on this heading.

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Flowing 79

London → Sydney

↓ route details
Route strength 57

Other paths · Stop quality

Problems now 100

Closed areas · Flight options

Same clean airspace category as Singapore routing, ranked slightly lower due to longer journey time and the LHR–HKG leg's position in the most congested Central Asian corridor band.

  • LHR–HKG first leg (~12h) uses Central Asian routing. Cathay Pacific has maintained consistent service on this route since 2022.
  • HKG–SYD 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 LHR–HKG connectivity throughout the post-2022 period.

Other options for this trip

Via Singapore 81
Via Dubai 66

Scores are based on official airspace warnings, added flight time, and how many reroute options exist. This is not a safety rating. Always check with your airline before you book.

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