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REP to CEI: distance & flight time
Siem-reap (Siem Reap International Airport) → Chiang Rai (Chiang Rai International Airport)
521 mi
839 km · 453 nm
1h 36m
estimated nonstop flight time
Same time
time difference · heading northwest
See live REP→CEI fares Phone-only fares on this route — call free
Flight time details
521 miles nonstop takes roughly 1h 36m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- REP — Siem Reap International Airport · Siem-reap, Cambodia
- 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 REP
- BBM · Battambang Airport45 mi away
- KZC · Kampong Chhnang Airport95 mi away
- PXR · Surin Airport103 mi away
- TDX · Trat Airport128 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 REP from CEI?
The flight distance from Siem-reap (REP) to Chiang Rai (CEI) is 521 miles (839 km, 453 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from REP to CEI?
A nonstop flight takes about 1h 36m 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 cheapest way to fly from REP to CEI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on REP–CEI that never appear on search engines, with no booking fees.