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IAD to HHQ: distance & flight time
Washington (Washington Dulles International Airport) → Prachuap Khiri Khan (Hua Hin Airport)
8,869 mi
14,273 km · 7,707 nm
17h 51m
estimated nonstop flight time
+11h
time difference · heading north
See live IAD→HHQ fares Phone-only fares on this route — call free
Flight time details
8,869 miles nonstop takes roughly 17h 51m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 11-hour time gain when reading arrival times on your ticket.
The two airports
- IAD — Washington Dulles International Airport · Washington, United States
- HHQ — Hua Hin Airport · Prachuap Khiri Khan, Thailand
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 IAD
Near HHQ
- UTP · U-Tapao International Airport71 mi away
- BKK · Suvarnabhumi Airport90 mi away
- MGZ · Myeik Airport91 mi away
- DMK · Don Mueang International Airport99 mi away
Frequently asked questions
How far is IAD from HHQ?
The flight distance from Washington (IAD) to Prachuap Khiri Khan (HHQ) is 8,869 miles (14,273 km, 7,707 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAD to HHQ?
A nonstop flight takes about 17h 51m 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 time difference between Washington and Prachuap Khiri Khan?
Prachuap Khiri Khan is 11 hours ahead of Washington.
What is the cheapest way to fly from IAD to HHQ?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAD–HHQ that never appear on search engines, with no booking fees.