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YST to USN: distance & flight time
St. Theresa Point (St. Theresa Point Airport) → Ulsan (Ulsan Airport)
5,718 mi
9,202 km · 4,969 nm
11h 41m
estimated nonstop flight time
+14h
time difference · heading northwest
See live YST→USN fares Phone-only fares on this route — call free
Flight time details
5,718 miles nonstop takes roughly 11h 41m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time gain when reading arrival times on your ticket.
The two airports
- YST — St. Theresa Point Airport · St. Theresa Point, Canada
- USN — Ulsan Airport · Ulsan, South Korea
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 USN
- KPO · Pohang Airport (G-815/K-3)28 mi away
- PUS · Gimhae International Airport37 mi away
- TAE · Daegu Airport44 mi away
- CHF · Jinhae Airbase/Airport (G-813/K-10)48 mi away
Frequently asked questions
How far is YST from USN?
The flight distance from St. Theresa Point (YST) to Ulsan (USN) is 5,718 miles (9,202 km, 4,969 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YST to USN?
A nonstop flight takes about 11h 41m 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 Ulsan?
Ulsan is 14 hours ahead of St. Theresa Point.
What is the cheapest way to fly from YST to USN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YST–USN that never appear on search engines, with no booking fees.