The first thing to know is that there are no direct flights from North America to Nepal. Every route involves at least one connection, and usually the total journey runs somewhere between 20 and 30 hours door to door. Choosing the connection well is most of the difference between an easy trip and a miserable one.
How the routing works
Kathmandu's Tribhuvan International Airport is served from three main directions, and your realistic options are:
| Via | Hubs | Suits |
|---|---|---|
| Gulf | Doha, Dubai, Abu Dhabi | East Coast and central US, usually one stop |
| East Asia | Seoul, Hong Kong, Bangkok, Kuala Lumpur | West Coast, often the shortest total time from California |
| India / South Asia | Delhi, Mumbai | Frequently cheapest, but adds visa and terminal-change complications |
| Europe | Istanbul | Workable from the East Coast |
From Los Angeles and the West Coast, routing over East Asia is usually shorter in elapsed time than going the other way round the planet. From New York, Boston and the East Coast, the Gulf carriers or Istanbul are typically the cleanest single-stop options. From Denver, Houston, Dallas and Miami you will nearly always take a domestic leg first, which means your real decision is which hub you connect through, not which airline flies from your city.
From Toronto the Gulf hubs work well. From Vancouver, East Asia is the natural direction for the same reason as the US West Coast.
Connecting through India: read this first
Routing through Delhi is often the cheapest option on a flight search, and it carries a complication that catches people out regularly. If you have to change terminals in Delhi, or if your bags are not checked through to Kathmandu, you may need an Indian transit visa to leave the secure area and re-enter.
Whether you need one depends on your nationality, the terminals involved and how the ticket is issued. Check it before you book, not after. A cheap fare that strands you at immigration is not cheap.
Leave a real connection buffer
Kathmandu has one international runway and weather delays propagate. More importantly, if you are heading to Western Nepal your journey does not end at Kathmandu.
Almost every Western Nepal trip requires a domestic flight to Nepalgunj, then a second, much smaller mountain flight to Jumla, Juphal or Simikot. Those mountain legs are weather-dependent and cancellations are routine rather than exceptional.
Never book a same-day connection between a mountain flight and an international departure.
Build two spare days at each end of the trip. This is not caution, it is the normal planning assumption for this region, and every experienced operator here works the same way. Details in how to get to West Nepal.
When to fly
Fares track Nepal's trekking seasons closely. October and November are peak, with the highest fares and fullest flights, and March through May is not far behind. If your dates are flexible, the shoulders on either side of those windows are noticeably cheaper.
Monsoon, June to September, is the cheapest period to fly and is genuinely unsuitable for most of Nepal. The exception is worth knowing: Dolpa, Humla and Mustang sit in the Himalayan rain shadow and stay largely dry, so a monsoon-season fare can buy a very good trip if you go to the right region. See the seasons guide.
Baggage, if you are trekking
International allowances are generous. Nepal's domestic mountain flights are not. The small aircraft serving Jumla, Juphal and Simikot have strict and much lower weight limits, and excess is charged or simply left behind for the next flight.
Pack for the domestic limit rather than the international one, and expect to leave a bag at your Kathmandu hotel. Most hotels store luggage for trekkers as a matter of course.
Before you book
Decide your region and trip length first, then buy flights around it. A ticket bought before the itinerary tends to force a rushed trek. Start with the trip planning guide, and if you are coming from the US or Canada you will also want the visa on arrival guide.
FAQ
Are there direct flights from the US to Nepal?
No. There are no direct flights from anywhere in North America to Kathmandu. Every itinerary connects at least once, most commonly through a Gulf hub such as Doha or Dubai, through East Asia, or through Delhi.
How long does it take to fly from the US to Nepal?
Typically 20 to 30 hours door to door including connections, depending on your departure city and how long the layover runs. West Coast departures routing over East Asia and East Coast departures routing over the Gulf are usually the shortest.
What is the cheapest way to fly to Nepal from North America?
Routing through Delhi is frequently the lowest fare, but check whether your nationality and terminal change require an Indian transit visa before booking. Flying in the monsoon months is also much cheaper, and works well if your destination is Dolpa, Humla or Mustang, which sit in the rain shadow.
Do I need a transit visa for India when flying to Nepal?
Possibly. It depends on your nationality, whether you change terminals in Delhi, and whether your baggage is checked through. Verify with the Indian high commission or embassy for your country before booking a Delhi connection.
How much time should I leave between my international flight and a domestic flight in Nepal?
At least a full day, and two spare days at each end if your trip involves a mountain flight to Jumla, Juphal or Simikot. Those flights cancel for weather regularly, and a same-day connection to an international departure is the single most common way people miss flights here.
Route availability changes between seasons and airlines. Confirm current schedules when you book.