‹ Sydney to London

Via Hong Kong

Limited 53 /100

Sydney → London

Goes through a warning area

Route assessed 2h ago

17,600 km · 20h 50m

This routing flies about 580 km further than the straight line between these cities, roughly 41m 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 · ~20h 50m
Why this score
Airspace High
Detour Moderate
Backups Weak
Hub Strong
Airlines Strong
Why book

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

The catch

Part of this route goes through a flight warning area

Worth knowing

Monitor the Iranian airspace advisory before departure. Confirm with your airline whether your specific flight will be affected or rerouted.

Limited 53

Sydney → London

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

Other paths · Stop quality

Conditions now 48

Airspace warnings · Flight options

This corridor carries a warning advisory that other paths to London may avoid. Ask your airline which alternatives they offer on this route and how they compare on timing.

  • Sydney to Hong Kong (approximately 9h) is a clean, uncomplicated sector entirely south of any advisory zone.
  • Hong Kong to London second leg routes over Central Asia — standard European routing since the Russian airspace closure, but a heavily congested corridor slot.
  • Cathay Pacific has maintained consistent Sydney to Hong Kong to London service. Hong Kong hub has shown strong resilience through the post-2022 period.
  • Total journey is approximately 22 hours including transit — the longest of the three main corridor options, due to more northerly Hong Kong positioning.
  • This corridor makes most sense for travellers wanting to avoid all Gulf involvement, or connecting onward from Hong Kong to other East Asian points.
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 Sydney to London. 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 Sydney → All routes to London → Iranian Airspace Advisory zone →
← All options

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

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