Need help booking?
Unpublished phone-only deals available
GAI to UTH: distance & flight time
Gaithersburg (Montgomery County Airpark) → Udon Thani (Udon Thani Airport)
8,529 mi
13,727 km · 7,412 nm
17h 11m
estimated nonstop flight time
+11h
time difference · heading north
See live GAI→UTH fares Phone-only fares on this route — call free
Flight time details
8,529 miles nonstop takes roughly 17h 11m 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
- GAI — Montgomery County Airpark · Gaithersburg, 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 GAI
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 GAI from UTH?
The flight distance from Gaithersburg (GAI) to Udon Thani (UTH) is 8,529 miles (13,727 km, 7,412 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GAI to UTH?
A nonstop flight takes about 17h 11m 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 Gaithersburg and Udon Thani?
Udon Thani is 11 hours ahead of Gaithersburg.
What is the cheapest way to fly from GAI to UTH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GAI–UTH that never appear on search engines, with no booking fees.