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ONT to SDM: distance & flight time
Ontario (Ontario International Airport) → San Diego (Brown Field Municipal Airport)
109 mi
175 km · 94 nm
45m
estimated nonstop flight time
Same time
time difference · heading south
See live ONT→SDM fares Phone-only fares on this route — call free
Flight time details
109 miles nonstop takes roughly 45m gate to gate, flying south. 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
- ONT — Ontario International Airport · Ontario, United States
- SDM — Brown Field Municipal Airport · San Diego, 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 ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 mi away
Near SDM
Frequently asked questions
How far is ONT from SDM?
The flight distance from Ontario (ONT) to San Diego (SDM) is 109 miles (175 km, 94 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to SDM?
A nonstop flight takes about 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 cheapest way to fly from ONT to SDM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–SDM that never appear on search engines, with no booking fees.