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REP to ONT: distance & flight time
Siem-reap (Siem Reap International Airport) → Ontario (Ontario International Airport)
8,176 mi
13,157 km · 7,104 nm
16h 30m
estimated nonstop flight time
-14h
time difference · heading northeast
See live REP→ONT fares Phone-only fares on this route — call free
Flight time details
8,176 miles nonstop takes roughly 16h 30m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time set-back when reading arrival times on your ticket.
The two airports
- REP — Siem Reap International Airport · Siem-reap, Cambodia
- ONT — Ontario International Airport · Ontario, 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 REP
- BBM · Battambang Airport45 mi away
- KZC · Kampong Chhnang Airport95 mi away
- PXR · Surin Airport103 mi away
- TDX · Trat Airport128 mi away
Near ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 mi away
Frequently asked questions
How far is REP from ONT?
The flight distance from Siem-reap (REP) to Ontario (ONT) is 8,176 miles (13,157 km, 7,104 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from REP to ONT?
A nonstop flight takes about 16h 30m 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 Siem-reap and Ontario?
Ontario is 14 hours behind Siem-reap.
What is the cheapest way to fly from REP to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on REP–ONT that never appear on search engines, with no booking fees.