Need help booking?
Unpublished phone-only deals available
CEI to PSM: distance & flight time
Chiang Rai (Chiang Rai International Airport) → Portsmouth (Portsmouth International at Pease Airport)
8,042 mi
12,942 km · 6,988 nm
16h 14m
estimated nonstop flight time
-11h
time difference · heading north
See live CEI→PSM 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 set-back when reading arrival times on your ticket.
The two airports
- CEI — Chiang Rai International Airport · Chiang Rai, Thailand
- 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 CEI
- THL · Tachileik Airport37 mi away
- HOE · Ban Huoeisay Airport42 mi away
- MOG · Mong Hsat Airport56 mi away
- KET · Kengtung Airport95 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 CEI from PSM?
The flight distance from Chiang Rai (CEI) to Portsmouth (PSM) 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 CEI to PSM?
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 Chiang Rai and Portsmouth?
Portsmouth is 11 hours behind Chiang Rai.
What is the cheapest way to fly from CEI to PSM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CEI–PSM that never appear on search engines, with no booking fees.