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THS to IAD: distance & flight time
Sukhothai (Sukhothai Airport) → Washington (Washington Dulles International Airport)
8,551 mi
13,761 km · 7,431 nm
17h 14m
estimated nonstop flight time
-11h
time difference · heading north
See live THS→IAD 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 set-back when reading arrival times on your ticket.
The two airports
- THS — Sukhothai Airport · Sukhothai, Thailand
- IAD — Washington Dulles International Airport · Washington, 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 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 THS from IAD?
The flight distance from Sukhothai (THS) to Washington (IAD) 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 THS to IAD?
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 Sukhothai and Washington?
Washington is 11 hours behind Sukhothai.
What is the cheapest way to fly from THS to IAD?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on THS–IAD that never appear on search engines, with no booking fees.