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IAD to THS: distance & flight time
Washington (Washington Dulles International Airport) → Sukhothai (Sukhothai Airport)
8,551 mi
13,761 km · 7,431 nm
17h 14m
estimated nonstop flight time
+11h
time difference · heading north
See live IAD→THS fares Phone-only fares on this route — call free
Flight time details
8,551 miles nonstop takes roughly 17h 14m 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
- THS — Sukhothai Airport · Sukhothai, 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 THS
- PHS · Phitsanulok Airport44 mi away
- TKT · Tak Airport44 mi away
- PRH · Phrae Airport66 mi away
- LPT · Lampang Airport74 mi away
Frequently asked questions
How far is IAD from THS?
The flight distance from Washington (IAD) to Sukhothai (THS) is 8,551 miles (13,761 km, 7,431 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAD to THS?
A nonstop flight takes about 17h 14m 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 Sukhothai?
Sukhothai is 11 hours ahead of Washington.
What is the cheapest way to fly from IAD to THS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAD–THS that never appear on search engines, with no booking fees.