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IAD to CNX: distance & flight time
Washington (Washington Dulles International Airport) → Chiang Mai (Chiang Mai International Airport)
8,443 mi
13,587 km · 7,336 nm
17h 1m
estimated nonstop flight time
+11h
time difference · heading north
See live IAD→CNX fares Phone-only fares on this route — call free
Flight time details
8,443 miles nonstop takes roughly 17h 1m 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
- CNX — Chiang Mai International Airport · Chiang Mai, 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 CNX
- LPT · Lampang Airport49 mi away
- PYY · Mae Hong Son Airport54 mi away
- HGN · Mae Hong Son Airport74 mi away
- PRH · Phrae Airport90 mi away
Frequently asked questions
How far is IAD from CNX?
The flight distance from Washington (IAD) to Chiang Mai (CNX) is 8,443 miles (13,587 km, 7,336 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAD to CNX?
A nonstop flight takes about 17h 1m 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 Chiang Mai?
Chiang Mai is 11 hours ahead of Washington.
What is the cheapest way to fly from IAD to CNX?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAD–CNX that never appear on search engines, with no booking fees.