Why Do Planes Fly Over the Arctic?
Sources: ICAO, NOAA SWPC, FAA · Updated May 2026
Because the shortest path between two cities on a sphere is a great circle, and for most pairs of mid- to high-latitude northern hemisphere cities that great circle passes near the Arctic. A typical flight from New York to Hong Kong, London to Tokyo, or Frankfurt to Seoul is hundreds or thousands of kilometres shorter via polar routes than via lower-latitude alternatives. Polar routes were opened to commercial service after the Cold War (1990s-early 2000s) and expanded rapidly after Russian overflight became unavailable to many Western carriers in 2022, which forced westbound North America-Asia routes further north. Operators include British Airways, Air Canada, United, Cathay Pacific, Korean Air, Japan Airlines, Finnair, SAS, Emirates, and Qatar Airways. Polar operations require ETOPS approval, extended fuel reserves, cold-fuel monitoring, careful communications planning, and active space-weather watch (solar particles affect HF radio and GNSS at high latitudes).
Great circles — why straight lines look curved
The shortest distance between two points on a sphere is an arc of a great circle — a circle whose centre is the centre of the sphere. On a flat (Mercator) map, that arc looks curved and seems counterintuitive. In reality, a flight from New York (JFK, 40°N) to Tokyo (NRT, 35°N) crosses the Aleutian Islands and edges close to the Arctic Circle — even though both endpoints are at mid-latitudes — because the great circle bends north.
The further apart the two cities are in longitude (east-west), the more dramatic the bend. New York to Hong Kong via the great circle skims the Russian Arctic. London to Los Angeles passes north of Greenland. The polar route is not a "scenic detour"; it is mathematically the straightest path the aircraft can fly.
Operators and typical routes
Special considerations for polar operations
Diversion airports above 60°N are scarce. Operators flying polar routes typically have ETOPS-180 minimum, with many using ETOPS-207, 240, or higher. Suitable alternates include Anchorage (PANC), Cold Bay (PACD), Yellowknife (CYZF), Iqaluit (CYFB), and Tromsø (ENTC).
Jet-A1 freezes at -47 °C; jet fuel can cold-soak to outside-air temperatures of -65 °C or below in polar cruise. Crews monitor fuel temperature and may climb, descend, or accelerate to keep fuel above its freeze point.
High latitudes are outside geostationary satellite footprints. Operators rely on Iridium satellite voice and CPDLC data link plus HF voice as backup. See polar GNSS reliability.
Solar particle events at high latitudes can degrade HF radio, increase crew radiation dose, and disturb GNSS. The NOAA Space Weather Prediction Center (SWPC) issues polar-cap absorption alerts and radiation advisories. Operators may reroute polar flights south during major events. See polar solar radiation and solar maximum briefing.
Since February 2022, most Western carriers have been excluded from Russian airspace. Europe-Asia routes that historically went over Siberia now go further north (via the Arctic) or further south (via Caspian / Central Asia). This has increased polar route usage on many city pairs.
A brief history of polar commercial aviation
Scandinavian Airlines (SAS) opened the first commercial polar route in 1954 (Los Angeles-Copenhagen). The original "polar routes" were great-circle routings between Europe and the US West Coast that crossed Greenland and northern Canada. After the Cold War ended, Russian airspace opened to Western carriers (1990s-2010s) and the most economic Europe-Asia paths shifted from polar to mid-latitude transit through Siberia. The 2022 closure of Russian airspace to many Western operators reversed that — polar and near-Arctic routings expanded again on Europe-Asia pairs operated by non-Chinese, non-Russian carriers.
Is it safe?
Yes. Polar operations have a track record of thousands of safe flights per month. The combination of ETOPS-rated aircraft, dedicated alternate planning, space-weather watch, cold-fuel procedures, and satellite communications has made high-latitude transit routine. Incidents have been rare and dominated by issues unrelated to polar geography (engine warning indications, diversion for medical reasons).
Sources
- ICAO Doc 7030 — Regional Supplementary Procedures (NAT, PAC, EUR)
- FAA Order 8400.12 — Polar Operations Authorization
- NOAA Space Weather Prediction Center — polar absorption alerts
- ICAO Annex 6 Part I — Operation of Aircraft (ETOPS / EDTO)
- EUROCONTROL Network Manager — Eastbound Route Network Planning