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IAD to LPT: distance & flight time
Washington (Washington Dulles International Airport) → Lampang (Lampang Airport)
8,479 mi
13,645 km · 7,368 nm
17h 5m
estimated nonstop flight time
+12h
time difference · heading north
See live IAD→LPT fares Phone-only fares on this route — call free
Flight time details
8,479 miles nonstop takes roughly 17h 5m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time gain when reading arrival times on your ticket.
The two airports
- IAD — Washington Dulles International Airport · Washington, United States
- LPT — Lampang Airport · Lampang, 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 LPT
- PRH · Phrae Airport44 mi away
- CNX · Chiang Mai International Airport49 mi away
- THS · Sukhothai Airport74 mi away
- NNT · Nan Airport92 mi away
Frequently asked questions
How far is IAD from LPT?
The flight distance from Washington (IAD) to Lampang (LPT) is 8,479 miles (13,645 km, 7,368 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAD to LPT?
A nonstop flight takes about 17h 5m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from IAD to LPT?
Nonstop service on IAD–LPT depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 17h 5m nonstop estimate.
What is the time difference between Washington and Lampang?
Lampang is 12 hours ahead of Washington.
What is the cheapest way to fly from IAD to LPT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAD–LPT that never appear on search engines, with no booking fees.
Why are some IAD to LPT fares phone-only?
Consolidator contracts let us sell certain IAD–LPT tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.