Cheap Flights from London to Ontario, CA from $317

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On Cheapflightsplus.com you will find 469 connecting flights from London to Ontario. You can compare airfare deals from 23 airlines and multiple travel sites from $317, book and save on cheap plane tickets and last minute offers. Also check out LON-ONT flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip London to Ontario Flight Deals

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $317 (one-way), $544 (round-trip).

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Best Flights from London to Ontario Today

Take a look at the list of non stop flights and flights with layovers from London to Ontario with the lowest price of $317. Take a look at the list of flights with layovers from London to Ontario from $317. There’re no direct flights. The fastest connecting flight – 13h 21m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $335 Find flight	11:15 London Heathrow	16:36 Ontario Ontario Int.	13h 21m layover 1h 0m - Phoenix	British Airways	BA1526 BA6916
from $335 Find flight	10:30 London Heathrow	17:40 Ontario Ontario Int.	15h 10m layover 1h 55m - Dallas	British Airways	BA1590 BA2434
from $335 Find flight	08:20 London Heathrow	16:06 Ontario Ontario Int.	15h 46m layover 2h 44m - Dallas	British Airways	BA1504 BA5135
from $335 Find flight	08:20 London Heathrow	17:40 Ontario Ontario Int.	17h 20m layover 4h 10m - Dallas	British Airways	BA1504 BA2434
from $356 Find flight	16:25 London Heathrow	23:36 Ontario Ontario Int.	15h 11m layover 1h 55m - Dallas	British Airways	BA1530 BA2432
from $356 Find flight	08:20 London Heathrow	21:56 Ontario Ontario Int.	21h 36m layover 8h 15m - Dallas	British Airways	BA1504 BA2431
from $369 Find flight	12:00 London Heathrow	21:56 Ontario Ontario Int.	17h 56m layover 4h 30m - Dallas	British Airways	BA1520 BA2431
from $375 Find flight	10:30 London Heathrow	22:14 Ontario Ontario Int.	19h 44m layover 6h 27m - Dallas	British Airways	BA1590 BA2433
from $384 Find flight	10:30 London Heathrow	21:56 Ontario Ontario Int.	19h 26m layover 6h 0m - Dallas	British Airways	BA1590 BA2431
from $419 Find flight	15:10 London Heathrow	22:10 Ontario Ontario Int.	15h 0m layover 1h 50m - Dallas	British Airways	BA1573 BA2431
from $462 Find flight	15:10 London Heathrow	22:08 Ontario Ontario Int.	14h 58m layover 1h 44m - Dallas	Iberia	IB4739 IB4226
from $317 Find flight	11:35 London Gatwick	22:48 Ontario Ontario Int.	19h 13m layover 1h 0m - Madrid 1h 38m - Dallas	British Airways	BA7195 BA4299 BA2433
from $320 Find flight	10:50 London Heathrow	22:48 Ontario Ontario Int.	19h 58m layover 1h 45m - Madrid 1h 38m - Dallas	British Airways	BA7055 BA4299 BA2433
from $320 Find flight	09:15 London Heathrow	22:48 Ontario Ontario Int.	21h 33m layover 3h 20m - Madrid 1h 38m - Dallas	British Airways	BA7053 BA4299 BA2433
from $320 Find flight	06:15 London Heathrow	22:48 Ontario Ontario Int.	24h 33m layover 6h 20m - Madrid 1h 38m - Dallas	British Airways	BA456 BA4299 BA2433
from $384 Find flight	07:45 London Heathrow	22:00 Ontario Ontario Int.	22h 15m layover 1h 30m - Madrid 4h 18m - Dallas	British Airways	BA458 BA1513 BA2431

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on July 03, 2025

Flight Schedule London to Ontario (California)

Full flight schedule will help you in detecting at what time planes fly from London to Ontario. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.

Departure	Flight Details	Flight Duration	Price
08:20 — 16:06	08:20 — 12:20 BA1504 British Airways London — Dallas 2h 44m stop 22:55 — 23:59 BA5135 British Airways Dallas — Ontario	15h 46m including layover	Find flight from$335
08:20 — 17:40	08:20 — 12:30 BA1504 British Airways London — Dallas 4h 10m stop 17:30 — 18:36 BA2434 British Airways Dallas — Ontario	17h 20m including layover	Find flight from$335
09:50 — 18:28	09:50 — 11:35 BA53 British Airways London — Seattle 4h 13m stop 15:48 — 18:28 HA6668 Hawaiian Airlines Seattle — Ontario	16h 38m including layover	Find flight from$515
09:50 — 23:59	09:50 — 11:35 BA53 British Airways London — Seattle 9h 42m stop 21:30 — 00:13 HA6811 Hawaiian Airlines Seattle — Ontario	22h 9m including layover	Find flight from$515
10:30 — 17:40	10:30 — 14:35 BA1590 British Airways London — Dallas 1h 55m stop 18:00 — 19:01 BA2434 British Airways Dallas — Ontario	15h 10m including layover	Find flight from$335
10:30 — 22:14	10:30 — 14:40 BA1590 British Airways London — Dallas 6h 27m stop 21:48 — 22:48 BA2433 British Airways Dallas — Ontario	19h 44m including layover	Find flight from$375
11:15 — 16:36	11:15 — 14:20 BA1526 British Airways London — Phoenix 1h stop 17:10 — 18:23 BA6916 British Airways Phoenix — Ontario	13h 21m including layover	Find flight from$335
11:15 — 21:38	11:15 — 14:20 BA1526 British Airways London — Phoenix 6h 15m stop 20:43 — 21:57 BA6915 British Airways Phoenix — Ontario	18h 23m including layover	Find flight from$432
12:00 — 21:56	12:00 — 16:05 BA1520 British Airways London — Dallas 4h 30m stop 21:00 — 22:14 BA2431 British Airways Dallas — Ontario	17h 56m including layover	Find flight from$369
12:00 — 22:34	12:00 — 16:15 BA1520 British Airways London — Dallas 5h 23m stop 22:41 — 23:43 BA2432 British Airways Dallas — Ontario	18h 34m including layover	Find flight from$419
13:25 — 23:59	13:25 — 15:45 KL4818 KLM London — Seattle 5h 32m stop 21:17 — 23:59 AS1040 Alaska Airlines Seattle — Ontario	18h 34m including layover	Find flight from$556
13:35 — 23:50	13:35 — 16:25 BA219 British Airways London — Denver 6h 4m stop 22:29 — 23:50 F91499 Frontier Airlines Denver — Ontario	18h 15m including layover	Find flight from$627
15:10 — 22:14	15:10 — 19:20 BA1573 British Airways London — Dallas 1h 47m stop 21:48 — 22:48 BA2433 British Airways Dallas — Ontario	15h 4m including layover	Find flight from$375
15:10 — 22:10	15:10 — 19:20 BA1573 British Airways London — Dallas 1h 50m stop 21:00 — 22:14 BA2431 British Airways Dallas — Ontario	15h including layover	Find flight from$419
16:25 — 23:36	16:25 — 20:39 BA1530 British Airways London — Dallas 1h 55m stop 22:41 — 23:43 BA2432 British Airways Dallas — Ontario	15h 11m including layover	Find flight from$356
16:25 — 23:54	16:25 — 20:35 BA1530 British Airways London — Dallas 2h 20m stop 22:55 — 23:59 BA5135 British Airways Dallas — Ontario	15h 29m including layover	Find flight from$419
17:25 — 10:44 +1 day	17:25 — 19:50 AF3586 Air France London — Seattle 12h 5m stop 07:55 — 10:44 AS1254 Alaska Airlines Seattle — Ontario	25h 19m including layover	Find flight from$535
17:25 — 11:05 +1 day	17:25 — 19:45 KL6022 KLM London — Seattle 12h 42m stop 08:27 — 11:05 AS1254 Alaska Airlines Seattle — Ontario	25h 40m including layover	Find flight from$612
18:30 — 16:36 +1 day	18:00 — 20:20 VS4036 Virgin Atlantic Airways London — Seattle 16h 52m stop 13:50 — 16:26 F93163 Frontier Airlines Seattle — Ontario	30h 6m including layover	Find flight from$626
18:30 — 11:05 +1 day	18:00 — 20:20 VS4036 Virgin Atlantic Airways London — Seattle 11h 37m stop 08:26 — 10:57 HA6814 Hawaiian Airlines Seattle — Ontario	24h 35m including layover	Find flight from$661

Departure	Arrival	Flight Details	Flight Time	Price
		stop stop	including layover	Find flight from$

*Departure and arrival times - local. Updated on July 3, 2025

Flight Information

Below we will explain in detail what the flights cost on the destination from London to Ontario depends on and how to choose the most interesting flight option for you.

Distance between London and Ontario is 8723 miles. Time difference between the cities is 8h. Airplanes depart 06:00 to 22:30 from 10 London airports and arrive 06:00 to 22:30 to 2 Ontario airports. Average flight time is 26h 56m.

The fastest flight 13h 21m
Average flight time 26h 56m
The earliest flight 06:00
The latest flight 22:30
Distance 5421 ml

The cheapest months to travel to Ontario are may (from 395 $), august (from 423 $), june (from 427 $).

The most expensive months are november (from 4 199 $), february (from 1 949 $), january (from 1 372 $).

What is the lowest airfare London to Ontario?

The cheapest plane ticket found by our users is $317. This airfare is for economy class on one-way BA7195 flight by British Airways for August 27, 2025 which leaves Gatwick in London at 11:35 am and arrives at Ontario Ontario Int. at 22:48.

Economy class

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First class

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Popular Airlines on the Route

The flight London — Ontario is served by 23 regular airlines and 4 low-cost airlines. Most of the flights on this route are operated by KLM - 33 departures per week at the price of from $ 468 . And the most expensive tickets are offered by Air Canada airline - from $ 4759.

Direct flights

There’re no direct flights on this route. Try flights with stops.

Connecting Flights

There are 469 flights with layovers on the route. The fastest connecting flight is BA1526 by British Airways takes 13h 21m and the cheapest is BA7195 by British Airways for $317.

KL - KLM

from $468

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W9 - Wizz Air UK

from $717

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AC - Air Canada

from $1209

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VY - Vueling

from $540

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FI - Icelandair

from $618

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EI - Aer Lingus

from $516

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OS - Austrian Airlines

from $1398

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AF - Air France

from $474

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CI - China Airlines

from $3361

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AM - Aeromexico

from $702

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UA - United Airlines

from $831

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LX - SWISS International Air Lines

from $1314

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See more connecting flights

Airports

You can fly from London to Ontario from 10 airports (London City, London-Waterloo, Heathrow, Luton, British Rail Terminal, London Biggin Hill, Stansted, Gatwick, Ebbsfleet International Rail St, Stratford International Rail St).

London airports

London City-LCY

from $1329
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London-Waterloo-QQW

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Heathrow-LHR

from $320
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Luton-LTN

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British Rail Terminal-ZLX

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London Biggin Hill-BQH

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Stansted-STN

from $569
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Gatwick-LGW

from $317
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Ebbsfleet International Rail St-XQE

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Stratford International Rail St-XOF

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Ontario airports

Ontario Int.-ONT

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International Heliport-JIO

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Airplanes

There are flights to Ontario from London by 23 airlines that use 0 aircraft brands. They range from huge modern airplanes to small-sized.

Top International Destinations from London

Our state-of-the art metasearch will definitely provide you with the best airfare on international flights. We’re proud to partner with many reliable travel suppliers located outside the US what gives us an opportunity to offer the most competitive prices on far destinations.

London — Miami

from $55

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London — Boston

from $75

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London — Los Angeles

from $313

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London — Chicago

from $70

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London — Las Vegas

from $60

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London — Orlando

from $79

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London — Seattle

from $57

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London — San Francisco

from $58

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London — Atlanta

from $69

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London — Denver

from $59

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How to book a plane ticket yourself?

Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
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That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.
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