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CEI to REP: distance & flight time
Chiang Rai (Chiang Rai International Airport) → Siem-reap (Siem Reap International Airport)
521 mi
839 km · 453 nm
1h 36m
estimated nonstop flight time
Same time
time difference · heading southeast
See live CEI→REP fares Phone-only fares on this route — call free
Flight time details
521 miles nonstop takes roughly 1h 36m gate to gate, flying southeast. 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
- CEI — Chiang Rai International Airport · Chiang Rai, Thailand
- REP — Siem Reap International Airport · Siem-reap, Cambodia
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 REP
- BBM · Battambang Airport45 mi away
- KZC · Kampong Chhnang Airport95 mi away
- PXR · Surin Airport103 mi away
- TDX · Trat Airport128 mi away
Frequently asked questions
How far is CEI from REP?
The flight distance from Chiang Rai (CEI) to Siem-reap (REP) is 521 miles (839 km, 453 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CEI to REP?
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 CEI to REP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CEI–REP that never appear on search engines, with no booking fees.