Need help booking?
Unpublished phone-only deals available
HPH to ALN: distance & flight time
Haiphong (Cat Bi International Airport) → Alton/St Louis (St Louis Regional Airport)
8,171 mi
13,150 km · 7,100 nm
16h 29m
estimated nonstop flight time
—
time difference · heading north
See live HPH→ALN fares Phone-only fares on this route — call free
Flight time details
8,171 miles nonstop takes roughly 16h 29m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- HPH — Cat Bi International Airport · Haiphong, Vietnam
- ALN — St Louis Regional Airport · Alton/St Louis, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near HPH
- HAN · Noi Bai International Airport65 mi away
Near ALN
- STL · St Louis Lambert International Airport20 mi away
- BLV · Scott AFB/Midamerica Airport26 mi away
- SUS · Spirit of St Louis Airport36 mi away
- SPI · Abraham Lincoln Capital Airport69 mi away
Frequently asked questions
How far is HPH from ALN?
The flight distance from Haiphong (HPH) to Alton/St Louis (ALN) is 8,171 miles (13,150 km, 7,100 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from HPH to ALN?
A nonstop flight takes about 16h 29m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the cheapest way to fly from HPH to ALN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HPH–ALN that never appear on search engines, with no booking fees.