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Due to the effect of the current situation on air traffic, fewer offers are being submitted. Some offers might now no longer be available.
Outbound flight: 09/24/21
08:25 ONT
06:25 LHR
Ontario-CA
London Heathrow
1 Stopover
American Airlines
Return flight: 10/07/21
11:00 LHR
19:48 ONT
London Heathrow
Ontario-CA
1 Stopover
American Airlines
$900
Check
Outbound flight: 09/24/21
16:42 ONT
06:25 LHR
Ontario-CA
London Heathrow
1 Stopover
American Airlines
Return flight: 10/07/21
11:00 LHR
23:37 ONT
London Heathrow
Ontario-CA
1 Stopover
American Airlines
$906
Check
Outbound flight: 09/24/21
00:45 ONT
06:25 LHR
Ontario-CA
London Heathrow
1 Stopover
British Airways
Return flight: 10/07/21
17:15 LHR
19:20 ONT
London Heathrow
Ontario-CA
direct
American Airlines
$921
Check
Outbound flight: 09/04/21
22:25 ONT
08:00 LHR
Ontario-CA
London Heathrow
1 Stopover
American Airlines
Return flight: 09/09/21
11:00 LHR
11:19 ONT
London Heathrow
Ontario-CA
1 Stopover
Westjet
$1,299
Check
Outbound flight: 09/04/21
12:15 ONT
11:55 LHR
Ontario-CA
London Heathrow
2 Stopovers
Alaska Airlines, Icelandair
Return flight: 09/09/21
13:10 LHR
00:35 ONT
London Heathrow
Ontario-CA
2 Stopovers
Icelandair
$1,537
Check
Outbound flight: 06/01/21
16:15 ONT
09:40 LHR
Ontario-CA
London Heathrow
1 Stopover
United Airlines
$829
Offers unavailable
Outbound flight: 06/14/21
09:45 ONT
06:55 LHR
Ontario-CA
London Heathrow
1 Stopover
United Airlines
$1,283
Offers unavailable
Outbound flight: 06/14/21
09:45 ONT
06:55 LHR
Ontario-CA
London Heathrow
1 Stopover
United Airlines
$1,289
Offers unavailable
Outbound flight: 06/14/21
09:45 ONT
14:10 LHR
Ontario-CA
London Heathrow
1 Stopover
United Airlines
$1,345
Offers unavailable
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from Ontario to London-Heathrow

Favorite airline: United Airlines
70 % of flights booked on the route from Ontario to London Heathrow are booked with United Airlines, American Airlines and British Airways.
United Airlines
50 %
American Airlines
15 %
British Airways
5 %
Favourite connection: via Denver
Flights with a stopover in Denver are the most popular connection for this route.
Route
bookings
1 stopover Denver International Airport, CO
12h 20min, from $523
45 %
2 stopovers Seattle-Tacoma International Airport, WA Reykjavik-Keflavik International
17h 50min, from $1,492
36 %
1 stopover Phoenix - Sky Harbor International Airport
13h 34min, from $367
18 %
Flight information Ontario - London Heathrow
Alternative flight routes
Cheap direct flights
Flight details Ontario - London Heathrow
  • Distance: 8717 km
Top Flight Routes