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RDU to ONT: distance & flight time
Raleigh-durham (Raleigh Durham International Airport) → Ontario (Ontario International Airport)
2,187 mi
3,519 km · 1,900 nm
4h 45m
estimated nonstop flight time
-3h
time difference · heading west
See live RDU→ONT fares Phone-only fares on this route — call free
Flight time details
2,187 miles nonstop takes roughly 4h 45m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time set-back when reading arrival times on your ticket.
The two airports
- RDU — Raleigh Durham International Airport · Raleigh-durham, United States
- 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 RDU
- POB · Pope Field50 mi away
- RWI · Rocky Mount Wilson Regional Airport50 mi away
- FBG · Simmons Army Air Field52 mi away
- SOP · Moore County Airport56 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 RDU from ONT?
The flight distance from Raleigh-durham (RDU) to Ontario (ONT) is 2,187 miles (3,519 km, 1,900 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RDU to ONT?
A nonstop flight takes about 4h 45m 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 Raleigh-durham and Ontario?
Ontario is 3 hours behind Raleigh-durham.
What is the cheapest way to fly from RDU to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RDU–ONT that never appear on search engines, with no booking fees.