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YST to PSM: distance & flight time
St. Theresa Point (St. Theresa Point Airport) → Portsmouth (Portsmouth International at Pease Airport)
1,318 mi
2,122 km · 1,146 nm
3h 20m
estimated nonstop flight time
+1h
time difference · heading southeast
See live YST→PSM fares Phone-only fares on this route — call free
Flight time details
1,318 miles nonstop takes roughly 3h 20m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- YST — St. Theresa Point Airport · St. Theresa Point, Canada
- PSM — Portsmouth International at Pease Airport · Portsmouth, 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 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 PSM
- BOS · General Edward Lawrence Logan International Airport50 mi away
- LWM · Lawrence Municipal Airport29 mi away
- MHT · Manchester-Boston Regional Airport33 mi away
- BVY · Beverly Municipal Airport34 mi away
Frequently asked questions
How far is YST from PSM?
The flight distance from St. Theresa Point (YST) to Portsmouth (PSM) is 1,318 miles (2,122 km, 1,146 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from YST to PSM?
A nonstop flight takes about 3h 20m 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 Portsmouth?
Portsmouth is 1 hour ahead of St. Theresa Point.
What is the cheapest way to fly from YST to PSM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on YST–PSM that never appear on search engines, with no booking fees.