Connecting Flights in Beijing: PEK and PKX Transfers Without Missing Your Plane

Two airports, 67 km apart, and no airside link between them

PEK (Capital) is the older hub in the north-east, with Terminal 2 and the enormous Terminal 3. PKX (Daxing) is the newer single-terminal airport in the south. Long-haul international and Air China services cluster at PEK; China Southern, China Eastern and a growing list of international routes are at PKX. Before you book anything else, check the three-letter code on each flight — the word "Beijing" on a booking screen tells you nothing about which of the two you are landing at.

• PEK — Beijing Capital (北京首都国际机场) — Three-terminal layout: T2, T3 and the west satellite hall. Walking distances are long — T3-C to T3-E alone is a 15–20 minute ride on the automated people-mover.
• PKX — Beijing Daxing (北京大兴国际机场) — One terminal, five piers radiating from a central hall, with a dedicated transfer level. Centre to the farthest gate is about 600 m, roughly 8 minutes on foot — it was designed for transfers.
• Between the two — About 67 km by road. There is no airside connection and no guaranteed free transfer: you go landside and travel as if you were two separate passengers.

Minimum connection time is a floor, not a plan

MCT (最短衔接时间, minimum connection time) is the number a booking system uses to decide whether it is allowed to sell you an itinerary at all. It assumes you know the airport, walk fast, and that nothing goes wrong. For a first-time visitor travelling on a foreign passport with checked luggage, treat the published figure as an absolute lower bound and add your own buffer on top.

• PEK, same terminal — Commonly quoted figures: domestic→domestic 60 minutes; international↔domestic 120 minutes; international→international 100 minutes at T2 and 60 minutes at T3. Airlines publish their own values, so check the one attached to your ticket.
• PEK, changing terminal — Quoted cross-terminal MCTs run 120 minutes domestic-to-domestic and up to 160 minutes when international is involved, because the shuttle and a fresh security check both have to fit inside the window.
• PKX, single terminal — Among the shortest in the country: roughly 45 minutes domestic→domestic and 60 minutes between domestic and international. Design figures quoted when the airport opened were 30, 45 and 60 minutes.
• PEK ↔ PKX — Hainan Airlines publishes 300 minutes — five hours — for a Capital-to-Daxing interchange. That is the honest number for this move, and it is the one to argue with a booking site about.

Domestic → domestic: the easy direction

If both flights are on one booking, you normally stay airside. Follow the yellow 中转 / Transfer signs, look for a transfer counter if you were not handed a second boarding pass at your origin, and walk to the next gate. Hold luggage on a single domestic ticket is usually tagged to your final destination and you do not see it until you arrive. Two things break that: a self-transfer on separate tickets, where you must exit, collect bags and check in again; and an overnight or very long break, since many carriers will not hold a bag through a connection measured in days. You only re-clear security if you were forced landside.

International → domestic: you re-enter the country first

This is the direction that catches people out. Arriving from abroad at PEK or PKX, you are an arriving international passenger, not a transfer passenger, unless your next flight is also international. You clear immigration on your passport (with your visa or transit exemption), collect your checked bags, walk them through customs, and only then go back upstairs to check in for the domestic leg. The bag collection is not a formality you can skip: inbound international baggage has to clear customs, so even a bag tagged through to the final destination normally has to be claimed and re-dropped by you.

• Immigration — 30–60 minutes is normal at PEK T3 and at PKX just after a wide-body arrival; considerably worse when several long-haul flights land within the same half hour.
• Baggage and customs — Add another 20–40 minutes for the carousel and the walk through. Have your arrival card filled in and fingerprints already taken if you used the self-service kiosks.
• Domestic re-check-in — Counters close roughly 45 minutes before departure at PEK T3 and 30–45 minutes at T2; boarding gates shut about 20 minutes before. Be at the counter at least 90 minutes out.
• What to book — Three hours from scheduled landing to domestic departure is the comfortable minimum for a first-timer. Two hours is a gamble, and under 90 minutes you should assume you will miss it.

Domestic → international: the calmer direction

You land domestically, follow the transfer channel, clear exit immigration and security — but if your bags were through-checked you do not collect them, and there is no inbound customs inspection to queue for. Your real risk here is the stricter deadline on an international departure: check-in at PEK T3 shuts about 60–75 minutes before the flight. If your domestic feeder lands late, go to a transfer desk before you panic — on a single ticket the airline owns the problem and has to rebook you.

One ticket or two: this decides everything

The biggest variable is not the airport, it is whether your two flights live on one reservation. On one ticket the airline owns the connection: bags go through where the route allows it, and a late inbound is their problem to fix. On two separate tickets you are self-connecting — no through-checked bags, no rebooking, and a missed second flight is a new ticket you buy at walk-up prices.

• Look for the 通程 / "TC" product — China's domestic through-flight programme (通程航班) promises 一次支付、一次值机、一次安检、行李直挂、全程无忧 — one payment, one check-in, one security check, bags to the final destination, and help if the first leg slips. It works across airlines that have signed up, and on Chinese booking apps it carries a blue "TC" mark.
• Same airline is not the same as one ticket — Two Air China flights bought in two transactions are still two contracts. Check whether a single booking reference covers both sectors.
• Low-cost carriers — Spring Airlines and 9 Air enforce tight cabin-baggage limits and sell fares with no hold allowance. Never assume a bag will be through-checked onto one of them.
• If you must self-connect — Leave four hours at PEK and three at PKX, and fly hand-luggage-only if the trip allows it at all.

Changing terminals at PEK

T2 and T3 are separate buildings with separate security. A free shuttle bus runs between them around the clock — from the T3 arrivals level (gates 7–9) to T2 departures, and from the T2 arrivals level (gate 7) to T3 departures, roughly every 10–15 minutes. The ride is short; the security queue at the other end is not. Inside T3, the C, D and E sections are linked by an automated people-mover, with C to E taking about 15–20 minutes. Budget 45–60 minutes for any cross-terminal move on top of your connection buffer.

PEK ↔ PKX: budget half a day

This is a landside journey with a flight at the end of it, and it should be planned as one: leave the terminal, cross the city, then check in and clear security as though you were starting from scratch.

• Taxi or DiDi — 60–90 minutes in normal traffic, longer in the morning and evening peaks. Expect a fare in the hundreds of yuan; check the in-app estimate before you accept the ride.
• By metro — Possible, but it means several changes — Daxing Airport Express to Caoqiao, then across the network to the Capital Airport Express. Allow around two hours and avoid it with luggage at rush hour.
• Airport coaches — Inter-airport bus services exist but run to a timetable. With a flight to catch, a timetable is one more thing that can go wrong.
• What to book — Five hours between flights is the figure airlines themselves use. Under three hours, change your plan rather than your taxi.

Six hours or more: go out, sleep, or stay put?

With six hours or more, and a visa or transit exemption that lets you enter, going into the city can be worth it — but only once you have priced in roughly an hour each way to the centre from either airport by express train or metro. Below that threshold, the airport is the safer choice: both PEK and PKX have pay-in lounges and landside hotels, and short-stay rest rooms have appeared at both, though availability changes — confirm before you count on one. If a broken connection strands you overnight, leave the airside area, sort out a bed, and come back through security in the morning; you generally cannot sleep airside in a terminal that closes for the night.

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