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IAD to UTH: distance & flight time
Washington (Washington Dulles International Airport) → Udon Thani (Udon Thani Airport)
8,545 mi
13,751 km · 7,425 nm
17h 13m
estimated nonstop flight time
+11h
time difference · heading north
See live IAD→UTH fares Phone-only fares on this route — call free
Flight time details
8,545 miles nonstop takes roughly 17h 13m 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
- UTH — Udon Thani Airport · Udon Thani, 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 UTH
- VTE · Wattay International Airport44 mi away
- KKC · Khon Kaen Airport64 mi away
- LOE · Loei Airport70 mi away
- SNO · Sakon Nakhon Airport89 mi away
Frequently asked questions
How far is IAD from UTH?
The flight distance from Washington (IAD) to Udon Thani (UTH) is 8,545 miles (13,751 km, 7,425 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAD to UTH?
A nonstop flight takes about 17h 13m 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 Udon Thani?
Udon Thani is 11 hours ahead of Washington.
What is the cheapest way to fly from IAD to UTH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAD–UTH that never appear on search engines, with no booking fees.