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YST to ROI: distance & flight time
St. Theresa Point (St. Theresa Point Airport) → Roi Et (Roi Et Airport)
7,478 mi
12,035 km · 6,499 nm
15h 8m
estimated nonstop flight time
+12h
time difference · heading north
See live YST→ROI fares Phone-only fares on this route — call free
Flight time details
7,478 miles nonstop takes roughly 15h 8m 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
- YST — St. Theresa Point Airport · St. Theresa Point, Canada
- ROI — Roi Et Airport · Roi Et, 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 YST
- YIV · Island Lake Airport8 mi away
- YGO · Gods Lake Narrows Airport51 mi away
- YRS · Red Sucker Lake Airport57 mi away
- ZGI · Gods River Airport75 mi away
Near ROI
- KKC · Khon Kaen Airport70 mi away
- BFV · Buri Ram Airport70 mi away
- ZVK · Savannakhet Airport72 mi away
- SNO · Sakon Nakhon Airport78 mi away
Frequently asked questions
How far is YST from ROI?
The flight distance from St. Theresa Point (YST) to Roi Et (ROI) is 7,478 miles (12,035 km, 6,499 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YST to ROI?
A nonstop flight takes about 15h 8m 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 St. Theresa Point and Roi Et?
Roi Et is 12 hours ahead of St. Theresa Point.
What is the cheapest way to fly from YST to ROI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YST–ROI that never appear on search engines, with no booking fees.