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THS to DCA: distance & flight time
Sukhothai (Sukhothai Airport) → Washington (Ronald Reagan Washington National Airport)
8,556 mi
13,770 km · 7,435 nm
17h 15m
estimated nonstop flight time
-11h
time difference · heading north
See live THS→DCA fares Phone-only fares on this route — call free
Flight time details
8,556 miles nonstop takes roughly 17h 15m 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
- DCA — Ronald Reagan Washington National 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
Near DCA
Frequently asked questions
How far is THS from DCA?
The flight distance from Sukhothai (THS) to Washington (DCA) is 8,556 miles (13,770 km, 7,435 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from THS to DCA?
A nonstop flight takes about 17h 15m 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 DCA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on THS–DCA that never appear on search engines, with no booking fees.