Flying Within China: When a Domestic Flight Beats the Train

Published 2026-10-21 · 71Asia Tours

I love China's trains. But sometimes you should fly

Let me get this out of the way first: China's high-speed rail is one of the best travel systems on earth, and if a city is four or five hours away by train, take the train. Stations sit in the middle of town, security is quick, and you turn up twenty minutes before departure instead of two hours.

But the rail network has edges. Go west toward Lhasa, south to Zhangjiajie, or try to link Chongqing and the coast with a packed schedule, and the arithmetic flips. A flight of two and a half hours can save you a full day, and in a two-week trip, a day matters.

When the plane wins

My rough rule: if the train ride is under four hours, never fly. The airport transfer and security lines cancel out any time saved. Between four and six hours, it depends on schedules and prices. Past six hours, or when mountains are involved, I start looking at flights seriously.

Chengdu to Lhasa: about two hours in the air versus more than 36 hours on the train. No contest, though the train has its fans (see our Tibet railway guide).
Shanghai to Zhangjiajie: a direct flight of roughly two and a half hours, versus a train with changes that eats most of a day.
Chongqing or Chengdu to Shanghai or Beijing: trains take seven to nine hours by day; a flight, under three. If you value a full day on the ground, fly.
Xi'an to anywhere far: the city sits at the crossroads of the rail network, so trains are often fine. But Xi'an to Lhasa or Urumqi? Fly.

Booking a domestic ticket as a foreigner

Trip.com handles domestic China flights in English and takes foreign cards, and it's what I use most of the time. Airline apps often require a Chinese phone number or ID, so I skip them.

Two things matter when booking. Your name must match your passport exactly, character for character; check-in staff compare them. Prices also move around a lot. Domestic fares are dynamic, and booking two to four weeks ahead usually lands you a decent fare; the day before, expect to pay double or more. A Shanghai-Chengdu flight can cost anywhere from about 500 to 2,000 yuan for the same seat. Also note your checked baggage allowance is tied to the fare class printed on the itinerary (Y, B, M, L and so on), though in practice full-service carriers rarely weigh carry-ons aggressively.

Airports: the two-airport problem and the clock

Check-in for domestic flights usually closes 45 minutes before departure, and the gate often closes 15 to 20 minutes out. I aim for 90 minutes early on a normal domestic flight, two hours at the mega-hubs. Security is thorough: laptops out, the 100ml liquid rule applies to carry-ons, and expect a quick pat-down.

Mind which airport you're flying from

Several cities split traffic across two airports, and turning up at the wrong one is a classic, expensive mistake.

Beijing: Capital (PEK, northeast) and Daxing (PKX, far south), roughly two hours apart by metro.
Shanghai: Hongqiao (SHA, in town, mostly domestic) and Pudong (PVG, far east, mostly international plus some domestic).
Chengdu: Tianfu (TFU, the huge new one southeast of town) and Shuangliu (CTU, closer in).
Chongqing (CKG), Xi'an (XIY), Lhasa (LXA) and Zhangjiajie (DYG) each have a single airport.

Baggage rules that actually matter

On full-service carriers (Air China, China Eastern, China Southern, Sichuan, Hainan), a checked bag of 20kg is typically included on domestic routes. On budget carriers (Spring Airlines, 9 Air, West Air and a few others), nothing is included: you pay per kilo, and airport fees are steep. If you booked a suspiciously cheap 300-yuan flight, check the airline before assuming you can bring a suitcase.

Power banks and spare batteries go in your cabin bag, never in checked luggage, and power banks need clear capacity markings (10,000 to 20,000 mAh is fine; unbranded ones can be confiscated). Lighters and matches are banned outright.

Delays: plan for them in summer

I still budget for delays. Summer thunderstorms strand flights up and down the coast; Chengdu and Chongqing get morning fog in winter that can hold flights for hours; and military airspace controls mean some routes wait for slots. A one-to-two-hour delay is common enough that I never book a tight same-day connection between a domestic flight and an international one.

If a flight is cancelled or badly delayed, the airline rebooks you free, and full-service carriers may owe small compensation on long delays. Sort it out at the counter in the terminal; it's faster than the phone queue.

The tricky destinations

Lhasa deserves its own paragraph. Foreigners can't just book a flight to Tibet and go: you need the Tibet Travel Permit arranged through a licensed agency, and airlines check it at check-in along with your passport. Book through the same agency that handles your permit. Direct flights run from Chengdu, Chongqing and Xi'an.

Zhangjiajie is the opposite case: the airport (DYG) is barely 15 minutes from town, and flying in from Shanghai, Xi'an or Chengdu turns an awkward journey into a simple afternoon.

Hong Kong, Macau and Taipei are different flights

Despite what the map suggests, flights between the mainland and Hong Kong, Macau or Taiwan count as cross-border. You'll use international terminals and clear immigration on both ends. A few practical notes: Hong Kong to mainland cities is often faster and cheaper by high-speed rail from West Kowloon; Macau's airport has a thin route network, so most people arrive by ferry or the bridge from Hong Kong; and Taipei connects to the mainland through cross-strait routes (Shanghai, Beijing, Xiamen, Chengdu and others) with limited daily frequencies, so book those further ahead than a domestic hop.

The short version: under four hours, take the train; past six, look at flights; and always double-check which airport. China is huge, and sometimes the fastest way across it is over it.

Written by the team at 71Asia Tours, a China-based tour operator with licensed Spanish- and English-speaking guides. Browse all tours · About us · Our guides · Reviews · FAQ