✈️ Flight Guide: Houston (IAH) → Kathmandu (KTM)

A typical itinerary from George Bush Intercontinental Airport (IAH) to Tribhuvan International Airport (KTM) in December involves at least one stop and total travel time of about 18–28 hours door-to-door, depending on connections. Popular routing hubs include Doha (DOH), Istanbul (IST), Delhi (DEL), and Doha-based or European carriers; use flight comparison tools to find optimal durations. Book early for December travel to secure shorter layovers and preferred connection times.

There are no regularly scheduled nonstop flights between George Bush Intercontinental Airport (IAH) and Tribhuvan International Airport (KTM); most itineraries require at least one connection in Doha, Istanbul, New Delhi, or Dubai. For December travel, check airlines like Qatar Airways, Turkish Airlines, and Air India for single-connection options and seasonal schedule adjustments.

To find cheap George Bush Intercontinental Airport (IAH) to Tribhuvan International Airport (KTM) flights in December, search early (6–12 weeks), compare multi-airline itineraries, use fare alerts, and be flexible with travel dates around Christmas and New Year. Consider midweek departures, alternate nearby departure airports (e.g., Austin-Bergstrom International Airport (AUS) or Dallas/Fort Worth International Airport (DFW)), and book connecting carriers separately only if you have buffer time for layovers.

December at George Bush Intercontinental Airport (IAH) typically features mild to cool weather with low chances of major weather delays compared with winter storm regions; however, occasional cold fronts and rain can affect schedules. Monitor the National Weather Service for Houston forecasts and allow extra travel time to the airport during holiday peak days.

George Bush Intercontinental Airport (IAH) offers lounges, transit hotels nearby, baggage services, and numerous dining options; in December you’ll find seasonal amenities like enhanced holiday staffing and gift shops. If you have a long layover, consider using the Skyway train to change terminals, visiting airline lounges (based on class or membership), or booking a day room at a nearby airport hotel.

Transit visa requirements depend on the connecting country on your George Bush Intercontinental Airport (IAH) to Tribhuvan International Airport (KTM) itinerary; many travelers transiting through Doha, Istanbul, or Dubai do not require transit visas for short stays, but rules vary by nationality. Check consulate and airline guidance well before December travel, and consider transfer-only tickets to simplify procedure.

Arrival at Tribhuvan International Airport (KTM) in December typically includes passport control, baggage claim, and a customs check; December brings cooler, dry weather in Kathmandu which makes ground transfers smooth. Expect moderate airport crowds during holiday periods, and plan onward travel to Pokhara, Chitwan, or Lumbini — many travelers choose private transfers, tourist buses, or domestic flights for connections.

As of December, Nepal’s entry rules can include health checks and documentation depending on global public health conditions; travelers should verify the latest requirements from Nepal’s Civil Aviation Authority and local health authorities before departure. Carry vaccination records and digital copies of health forms, and check airline advisories for pre-departure testing or screening updates.

From Tribhuvan International Airport (KTM) to central Kathmandu you can take official airport taxis, pre-arranged hotel transfers, ride-hailing apps where available, or private cars; the 30–60 minute road transfer depends on traffic and weather. In December, roads are generally dry and clear, but early mornings and evenings are colder — book transfers in advance during the holiday season.

December can be a rewarding month for lower-elevation treks (like Ghorepani or Langtang lower sections), as skies are often clear and views of the Himalaya are spectacular, though higher-altitude treks can be cold and snowy. If you plan popular routes like Annapurna Circuit or Everest base areas, arrange for appropriate winter gear and consider guided services for safety and acclimatization.

From Tribhuvan International Airport (KTM), nearby major destinations include Pokhara (domestic flight or 6–8 hour drive), Chitwan National Park (5–7 hour drive), Lumbini (domestic flight or long road trip), Bhaktapur and Patan for cultural day trips. December offers excellent sightseeing weather for Kathmandu Valley and cultural tours, though evenings are colder — pack layers and book internal flights early.

Customs allowances for Nepal vary; arrive prepared with receipts for electronics and declare any high-value items at Tribhuvan International Airport (KTM) to avoid issues. During December holidays, carry on essentials in case of delayed baggage and check airline baggage policies for international-to-domestic transfers within Nepal.