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OPO to CEI: distance & flight time
Porto (Francisco de Sá Carneiro Airport) → Chiang Rai (Chiang Rai International Airport)
6,218 mi
10,008 km · 5,404 nm
12h 40m
estimated nonstop flight time
+6h
time difference · heading northeast
See live OPO→CEI fares Phone-only fares on this route — call free
Flight time details
6,218 miles nonstop takes roughly 12h 40m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time gain when reading arrival times on your ticket.
The two airports
- OPO — Francisco de Sá Carneiro Airport · Porto, Portugal
- 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 OPO
- BGZ · Braga Municipal Aerodrome26 mi away
- VRL · Vila Real Airport50 mi away
- VSE · Aerodromo Goncalves Lobato (Viseu Airport)55 mi away
- VGO · Vigo Airport68 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 OPO from CEI?
The flight distance from Porto (OPO) to Chiang Rai (CEI) is 6,218 miles (10,008 km, 5,404 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OPO to CEI?
A nonstop flight takes about 12h 40m 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 Porto and Chiang Rai?
Chiang Rai is 6 hours ahead of Porto.
What is the cheapest way to fly from OPO to CEI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OPO–CEI that never appear on search engines, with no booking fees.