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Cheap flights from London to Ontario from £323
There are no direct flights from London to Ontario. The fastest way is one stop via San Francisco or Dallas, about 12h 45m door to door (196 connections a week on current schedules), with fares from £323.
No direct flights · 6 connection options From 18h 22m Cheapest in December Prices checked 13 days ago
London to Ontario at a glance
Cheapest one-way£323Ryanair · 3 stops · Sun 13 DecCheapest return£426Fri 20 Nov – Wed 25 NovFastest journey18h 22mRyanair · 3 stops
Nonstop flightsNoneConnect via San Francisco or Dallas
Best ways to fly from London to Ontario
Ranked by how easy the connection is: one airline or alliance first (bags and connection protected), then the quickest self-transfer options.
1Search
LON San Francisco (SFO) ONT
Leg 1: British Airways, United Airlines, Virgin Atlantic · Leg 2: Frontier Airlines, United Airlines
Wed13:30 LON16:13 SFO0h 47m connection17:00 SFO18:15 ONTUnited Airlines
2Search
LON Dallas (DFW) ONT
Leg 1: American Airlines, British Airways · Leg 2: American Airlines, Frontier Airlines
Tue14:45 LON18:28 DFW0h 47m connection19:15 DFW20:04 ONTAmerican Airlines
3Search
LON Denver (DEN) ONT
Leg 1: British Airways, United Airlines · Leg 2: Frontier Airlines, Southwest Airlines, United Airlines
Wed15:00 LON17:30 DEN2h 00m connection19:30 DEN20:38 ONTUnited Airlines
4Search
LON Seattle (SEA) ONT
Leg 1: Alaska Airlines, British Airways, Delta Air Lines · Leg 2: Alaska Airlines, Frontier Airlines, SkyWest
Sun10:15 LON11:52 SEA2h 38m connection14:30 SEA16:55 ONTBritish Airways + SkyWest
5Search
LON Chicago (ORD) ONT
Leg 1: American Airlines, British Airways, United Airlines · Leg 2: United Airlines, Volaris
Sat15:30 LON18:06 ORD2h 09m connection20:15 ORD22:11 ONTBritish Airways + United Airlines
6Search
LON New York (JFK) ONT
Leg 1: American Airlines, British Airways, Delta Air Lines · Leg 2: JetBlue Airways
Sun16:45 LON19:27 JFK2h 03m connection21:30 JFK00:16 ONTBritish Airways + JetBlue Airways
Connections are computed from flights actually flown over the last 8 weeks, with at least 45 minutes to change on one airline and 2 hours on separate tickets. Times are local. The search shows live itineraries and exact times.
Cheapest dates from London to Ontario
The lowest one-way fares found recently, cheapest first. Prices change; click through for the live fare.
Good to know
- Distance
- 8,725 km5,418 miles
- Journey time
- 18h 22mfastest found
- Time difference
- -8hOntario vs London
- Currency in Ontario
- USD
- Airports
- LGW, LHR, STN → ONT
Flights from London to Ontario: questions answered
How much is a flight from London to Ontario?
The cheapest one-way fare we found recently is £323 with 3 stops, departing in December. Return trips start from £426. Prices change constantly, so search your dates for the live fare.
Are there direct flights from London to Ontario?
No. There is no nonstop service, so you will connect, most easily in San Francisco, Dallas and Denver. Some connections are on one airline or alliance, so your bags and connection are protected on a single ticket.
How long is the flight from London to Ontario?
With one connection the journey usually takes around 18h 22m, depending on the layover. The straight-line distance is 8,725 km.
Where do you change planes between London and Ontario?
The best connecting points are San Francisco (SFO), Dallas (DFW), Denver (DEN) and Seattle (SEA). British Airways flies both legs via San Francisco, so you can book it as one ticket.
Which airports serve London and Ontario?
London: London Gatwick Airport (LGW), London Heathrow Airport (LHR), London Stansted Airport (STN) and London Luton Airport (LTN). Ontario: Ontario International Airport (ONT).
What is the time difference between London and Ontario?
Ontario is 8 hours behind London.
