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LDY to ONT: distance & flight time
Londonderry (City of Derry Airport) → Ontario (Ontario International Airport)
5,040 mi
8,112 km · 4,380 nm
10h 21m
estimated nonstop flight time
-8h
time difference · heading northwest
See live LDY→ONT fares Phone-only fares on this route — call free
Flight time details
5,040 miles nonstop takes roughly 10h 21m 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.
The two airports
- LDY — City of Derry Airport · Londonderry, United Kingdom
- 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 LDY
- BFS · Belfast International Airport46 mi away
- CFN · Donegal Airport47 mi away
- ENK · St Angelo Airport49 mi away
- ILY · Islay Airport57 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 LDY from ONT?
The flight distance from Londonderry (LDY) to Ontario (ONT) is 5,040 miles (8,112 km, 4,380 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from LDY to ONT?
A nonstop flight takes about 10h 21m 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 Londonderry and Ontario?
Ontario is 8 hours behind Londonderry.
What is the cheapest way to fly from LDY to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on LDY–ONT that never appear on search engines, with no booking fees.