HappyFares Travel Desk

The HappyFares editorial team covers flight booking tips, airline policies, airport guides, and travel hacks for Indian travellers. We research current fares, policies, and DGCA regulations so you can fly smarter.

View of an airliner wing above a layer of clouds during cruise, illustrating a long-haul flight path

Why Don’t Planes Fly in a Straight Line? (Great Circle Routes) (2026)

Planes already fly the shortest path. On a sphere the most-direct route between two cities is a “great circle,” and that genuinely shortest line only looks curved when you draw it on a flat map. Mercator maps stretch the globe into a rectangle and distort distances badly near the poles, so the efficient arc appears

Why Don’t Planes Fly in a Straight Line? (Great Circle Routes) (2026) Read More »

View of clouds and sky through an airplane window at cruising altitude, where the cold outside air is extremely dry

Why Is the Air So Dry on Planes? Cabin Humidity Explained (2026)

Airplane cabin air is so dry because the outside air at cruise altitude (around 35,000 ft, roughly -50 to -55°C) holds almost no moisture, and most jets pressurise the cabin using that very dry compressed air. The constant flow of fresh, dry air flushes away the little moisture passengers add by breathing, so relative humidity

Why Is the Air So Dry on Planes? Cabin Humidity Explained (2026) Read More »

Passenger showing ID and boarding pass to staff at an airport boarding gate

Which IDs Are Valid for Domestic Flights in India? (2026)

For a domestic flight in India you must carry an original government-issued photo ID along with your confirmed ticket or boarding pass; it’s checked at terminal entry, security and the boarding gate. The most reliably accepted IDs are Aadhaar (including mAadhaar), passport, driving licence and Voter ID, with PAN and a few others also on

Which IDs Are Valid for Domestic Flights in India? (2026) Read More »

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