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LAM to ONT: distance & flight time
Los Alamos (Los Alamos Airport) → Ontario (Ontario International Airport)
653 mi
1,052 km · 568 nm
1h 53m
estimated nonstop flight time
-1h
time difference · heading west
See live LAM→ONT fares Phone-only fares on this route — call free
Flight time details
653 miles nonstop takes roughly 1h 53m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- LAM — Los Alamos Airport · Los Alamos, 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 LAM
- SAF · Santa Fe Municipal Airport21 mi away
- TSM · Taos Regional Airport52 mi away
- ABQ · Albuquerque International Sunport61 mi away
- LVS · Las Vegas Municipal Airport65 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 LAM from ONT?
The flight distance from Los Alamos (LAM) to Ontario (ONT) is 653 miles (1,052 km, 568 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from LAM to ONT?
A nonstop flight takes about 1h 53m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from LAM to ONT?
Nonstop service on LAM–ONT depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 1h 53m nonstop estimate.
What is the time difference between Los Alamos and Ontario?
Ontario is 1 hour behind Los Alamos.
What is the cheapest way to fly from LAM to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on LAM–ONT that never appear on search engines, with no booking fees.
Why are some LAM to ONT fares phone-only?
Consolidator contracts let us sell certain LAM–ONT tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.