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PSM to CEI: distance & flight time
Portsmouth (Portsmouth International at Pease Airport) → Chiang Rai (Chiang Rai International Airport)
8,042 mi
12,942 km · 6,988 nm
16h 14m
estimated nonstop flight time
+11h
time difference · heading north
See live PSM→CEI fares Phone-only fares on this route — call free
Flight time details
8,042 miles nonstop takes roughly 16h 14m 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
- PSM — Portsmouth International at Pease Airport · Portsmouth, United States
- CEI — Chiang Rai International Airport · Chiang Rai, 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 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
Near CEI
- THL · Tachileik Airport37 mi away
- HOE · Ban Huoeisay Airport42 mi away
- MOG · Mong Hsat Airport56 mi away
- KET · Kengtung Airport95 mi away
Frequently asked questions
How far is PSM from CEI?
The flight distance from Portsmouth (PSM) to Chiang Rai (CEI) is 8,042 miles (12,942 km, 6,988 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from PSM to CEI?
A nonstop flight takes about 16h 14m 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 Portsmouth and Chiang Rai?
Chiang Rai is 11 hours ahead of Portsmouth.
What is the cheapest way to fly from PSM to CEI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on PSM–CEI that never appear on search engines, with no booking fees.