9,000 VND gets you from Noi Bai to Cau Giay on Bus 7
Bus 7 is the rock-bottom option from Noi Bai International Airport (T1/T2) into west Hanoi, running to Cau Giay bus station in about 60–80 minutes depending on traffic. It costs roughly 9,000–10,000 VND (about US$0.40–0.50), paid in cash on board to a conductor, and runs roughly every 15–20 minutes in daytime hours.
The route runs HAN → Cau Giay, not the Old Quarter near Hoan Kiem Lake, so factor in a second leg if you’re staying around central tourist streets like Hang Dao or Ma May. TripAdvisor threads and local posters say to use Bus 86 or a taxi instead if you need a direct ride to the Old Quarter, because Bus 7 drops you several kilometers west of the usual hotel clusters.
From T2 (international), look for city bus signs outside the arrivals level; buses labeled 7 stop at the public bus bays that also serve routes like 17 and 86. The same route also serves domestic T1, so check the windshield sign for “7 Cau Giay” before boarding, as the number can be confused with other lines in Vietnamese-only signage near the curb.
Fare collection is old-school: a conductor walks the aisle, takes cash, and issues a small paper ticket showing the 9,000–10,000 VND price and route. Reviews mention some foreign visitors scrambling for smaller notes, so have a 10,000 VND bill ready rather than trying to use 100,000 VND notes on a crowded morning commuter run into Cau Giay.
Expect a slow, stop-heavy ride once you leave the airport road and hit city traffic; Reddit comments mention the 60-minute timetable stretching toward 80 minutes at late-afternoon peaks. Older buses sometimes run weak AC, and a few reviews mention summer rides feeling hot and cramped, especially when every seat and aisle space is taken between Noi Bai and busy transfer points.
Regulars say Bus 7 only really makes sense if your bed is already in west Hanoi neighborhoods like Cau Giay, Dich Vong, or near universities on the western side. Local commuters often queue right by the front door and move fast to grab one of the limited seats, because luggage space is minimal and standing with a 20–23 kg suitcase for an hour is rough.
Practical tip: if your hotel is near Hoan Kiem, pair Bus 7 with a short taxi or Grab from Cau Giay bus station, and budget at least 90 minutes total from T2 doors to your check-in desk.