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NST to DCA: distance & flight time
Nakhon Si Thammarat (Nakhon Si Thammarat Airport) → Washington (Ronald Reagan Washington National Airport)
9,157 mi
14,736 km · 7,957 nm
18h 25m
estimated nonstop flight time
-11h
time difference · heading north
See live NST→DCA fares Phone-only fares on this route — call free
Flight time details
9,157 miles nonstop takes roughly 18h 25m 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
- NST — Nakhon Si Thammarat Airport · Nakhon Si Thammarat, 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 NST
- URT · Surat Thani Airport69 mi away
- USM · Samui Airport70 mi away
- KBV · Krabi Airport72 mi away
- TST · Trang Airport75 mi away
Near DCA
Frequently asked questions
How far is NST from DCA?
The flight distance from Nakhon Si Thammarat (NST) to Washington (DCA) is 9,157 miles (14,736 km, 7,957 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from NST to DCA?
A nonstop flight takes about 18h 25m 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 Nakhon Si Thammarat and Washington?
Washington is 11 hours behind Nakhon Si Thammarat.
What is the cheapest way to fly from NST to DCA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on NST–DCA that never appear on search engines, with no booking fees.