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LHR to ONT: distance & flight time

London (London Heathrow Airport) → Ontario (Ontario International Airport)

5,410 mi
8,707 km · 4,702 nm
11h 5m
estimated nonstop flight time
-8h
time difference · heading northwest
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Flight time details

5,410 miles nonstop takes roughly 11h 5m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time set-back when reading arrival times on your ticket.

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The two airports

Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.

Alternate airports can cut this fare

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Frequently asked questions

How far is LHR from ONT?

The flight distance from London (LHR) to Ontario (ONT) is 5,410 miles (8,707 km, 4,702 nautical miles), measured along the great-circle route airlines actually fly.

How long is the flight from LHR to ONT?

A nonstop flight takes about 11h 5m 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 London and Ontario?

Ontario is 8 hours behind London.

What is the cheapest way to fly from LHR to ONT?

Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on LHR–ONT that never appear on search engines, with no booking fees.
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