Cheap Flights from Ontario, CA to London from $191

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On Cheapflightsplus.com you will find 138 connecting flights from Ontario to London. You can compare airfare deals from 7 airlines and multiple travel sites from $191, book and save on cheap plane tickets and last minute offers. Also check out ONT-LON flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Ontario to London 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: $191 (one-way), $328 (round-trip).

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Best Flights from Ontario to London Today

Take a look at the list of non stop flights and flights with layovers from Ontario to London with the lowest price of $191. Take a look at the list of flights with layovers from Ontario to London from $191. There’re no direct flights. The fastest connecting flight – 12h 55m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $388 Find flight	16:25 Ontario Ontario Int.	13:20+1 день London Heathrow	12h 55m layover 1h 49m - Phoenix	British Airways	BA6797 BA288
from $388 Find flight	11:04 Ontario Ontario Int.	09:40+1 день London Heathrow	14h 36m layover 2h 35m - Dallas	British Airways	BA5109 BA192
from $388 Find flight	07:00 Ontario Ontario Int.	06:20+1 день London Heathrow	15h 20m layover 3h 18m - Dallas	British Airways	BA5107 BA1589
from $388 Find flight	06:05 Ontario Ontario Int.	06:20+1 день London Heathrow	16h 15m layover 4h 13m - Dallas	British Airways	BA5110 BA1589
from $388 Find flight	07:00 Ontario Ontario Int.	07:20+1 день London Heathrow	16h 20m layover 4h 18m - Dallas	British Airways	BA5107 BA1505
from $191 Find flight	12:34 Ontario Ontario Int.	10:00+2 дня London Gatwick	37h 26m layover 9h 54m - Las Vegas 13h 45m - Orlando	Frontier Airlines	F92232 F91876 Z0784
from $235 Find flight	19:59 Ontario Ontario Int.	06:00+2 дня London Gatwick	26h 1m layover 1h 27m - Las Vegas 11h 46m - New York	Frontier Airlines	F94206 F93238 Z0702
from $258 Find flight	07:45 Ontario Ontario Int.	10:50+1 день London Heathrow	19h 5m layover 4h 30m - Denver 1h 30m - Reykjavik	Frontier Airlines	F91262 FI670 FI450
from $258 Find flight	07:45 Ontario Ontario Int.	10:55+1 день London Gatwick	19h 10m layover 4h 30m - Denver 1h 35m - Reykjavik	Frontier Airlines	F91262 FI670 FI470
from $271 Find flight	08:04 Ontario Ontario Int.	12:50+2 дня London Heathrow	44h 46m layover 9h 14m - Las Vegas 22h 45m - Calgary	Frontier Airlines	F91358 WS1585 WS18
from $311 Find flight	06:00 Ontario Ontario Int.	12:50+1 день London Heathrow	22h 50m layover 6h 21m - Seattle 3h 3m - Calgary	Alaska Airlines	AS1091 WS3613 WS18
from $319 Find flight	06:00 Ontario Ontario Int.	10:50+1 день London Heathrow	20h 50m layover 5h 45m - Seattle 1h 20m - Reykjavik	Alaska Airlines	AS1091 FI680 FI450
from $319 Find flight	06:00 Ontario Ontario Int.	10:55+1 день London Gatwick	20h 55m layover 5h 45m - Seattle 1h 25m - Reykjavik	Alaska Airlines	AS1091 FI680 FI470
from $330 Find flight	20:27 Ontario Ontario Int.	10:55+2 дня London Gatwick	30h 28m layover 15h 41m - Denver 1h 35m - Reykjavik	Frontier Airlines	F92908 FI670 FI470
from $331 Find flight	20:27 Ontario Ontario Int.	10:50+2 дня London Heathrow	30h 23m layover 15h 41m - Denver 1h 30m - Reykjavik	Frontier Airlines	F92908 FI670 FI450
from $333 Find flight	17:44 Ontario Ontario Int.	10:00+2 дня London Gatwick	32h 16m layover 11h 5m - Portland 5h 15m - Orlando	Alaska Airlines	AS3498 AS300 Z0784

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on January 22, 2025

Flight Schedule Ontario (California) to London

Full flight schedule will help you in detecting at what time planes fly from Ontario to London. 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
05:05 — 09:40 +1 day	05:05 — 08:24 UA1575 United Airlines Ontario — Denver 9h 11m stop 17:35 — 09:40 UA27 United Airlines Denver — London	20h 35m including layover	Find flight from$707
05:10 — 09:40 +1 day	05:10 — 08:29 UA2317 United Airlines Ontario — Denver 9h 6m stop 17:35 — 09:40 UA27 United Airlines Denver — London	20h 30m including layover	Find flight from$786
11:04 — 09:40 +1 day	10:43 — 15:38 BA5109 British Airways Ontario — Dallas 2h 35m stop 18:30 — 09:40 BA192 British Airways Dallas — London	14h 36m including layover	Find flight from$388
11:04 — 12:05 +1 day	10:43 — 15:38 BA5109 British Airways Ontario — Dallas 5h stop 21:00 — 12:05 BA1521 British Airways Dallas — London	17h 1m including layover	Find flight from$388
14:01 — 12:10 +1 day	14:01 — 16:14 F93335 Frontier Airlines Ontario — Portland 2h 16m stop 18:30 — 12:10 BA266 British Airways Portland — London	14h 9m including layover	Find flight from$549
15:09 — 12:05 +1 day	14:53 — 19:48 BA5111 British Airways Ontario — Dallas 55m stop 21:00 — 12:05 BA1521 British Airways Dallas — London	12h 56m including layover	Find flight from$435
15:09 — 07:20 +2 days	14:53 — 19:48 BA5111 British Airways Ontario — Dallas 20h 15m stop 16:20 — 07:20 BA1505 British Airways Dallas — London	32h 11m including layover	Find flight from$458
16:06 — 12:15 +2 days	16:06 — 18:59 AS1119 Alaska Airlines Ontario — Seattle 23h 51m stop 18:50 — 12:15 IB3506 Iberia Seattle — London	36h 9m including layover	Find flight from$506
16:25 — 13:20 +1 day	16:25 — 18:49 BA6797 British Airways Ontario — Phoenix 1h 49m stop 20:30 — 13:20 BA288 British Airways Phoenix — London	12h 55m including layover	Find flight from$388
22:45 — 16:55 +2 days	22:45 — 05:30 CI23 China Airlines Ontario — Taipei 2h 50m stop 08:30 — 17:05 CI81 China Airlines Taipei — London	34h 10m including layover	Find flight from$4940
06:00 — 12:50 +1 day	06:00 — 08:54 AS1091 Alaska Airlines Ontario — Seattle 6h 21m stop 15:15 — 18:07 WS3613 WestJet Seattle — Calgary 3h 3m stop 21:10 — 12:50 WS18 WestJet Calgary — London	22h 50m including layover	Find flight from$311
06:00 — 10:50 +1 day	06:00 — 08:49 AS1091 Alaska Airlines Ontario — Seattle 5h 45m stop 14:35 — 06:15 FI680 Icelandair Seattle — Reykjavik 1h 20m stop 07:35 — 10:50 FI450 Icelandair Reykjavik — London	20h 50m including layover	Find flight from$319
07:45 — 10:50 +1 day	06:45 — 10:10 F91262 Frontier Airlines Ontario — Denver 4h 30m stop 15:40 — 06:05 FI670 Icelandair Denver — Reykjavik 1h 30m stop 07:35 — 10:50 FI450 Icelandair Reykjavik — London	19h 5m including layover	Find flight from$258
07:45 — 10:55 +1 day	06:45 — 10:10 F91262 Frontier Airlines Ontario — Denver 4h 30m stop 15:40 — 06:05 FI670 Icelandair Denver — Reykjavik 1h 35m stop 07:40 — 10:55 FI470 Icelandair Reykjavik — London	19h 10m including layover	Find flight from$258
08:04 — 12:50 +2 days	08:04 — 09:16 F91358 Frontier Airlines Ontario — Las Vegas 9h 14m stop 18:30 — 22:25 WS1585 WestJet Las Vegas — Calgary 22h 45m stop 21:10 — 12:50 WS18 WestJet Calgary — London	44h 46m including layover	Find flight from$271
10:51 — 16:05 +1 day	10:43 — 15:38 BA5109 British Airways Ontario — Dallas 1h 31m stop 17:20 — 09:25 BA1512 British Airways Dallas — Madrid 5h 10m stop 14:35 — 16:05 BA469 British Airways Madrid — London	21h 14m including layover	Find flight from$401
10:51 — 17:15 +1 day	10:51 — 15:49 BA5109 British Airways Ontario — Dallas 1h 31m stop 17:20 — 09:25 BA1512 British Airways Dallas — Madrid 6h 25m stop 15:50 — 17:15 BA7068 British Airways Madrid — London	22h 24m including layover	Find flight from$401
12:34 — 10:00 +2 days	12:34 — 13:46 F92232 Frontier Airlines Ontario — Las Vegas 9h 54m stop 23:40 — 07:10 F91876 Frontier Airlines Las Vegas — Orlando 13h 45m stop 20:55 — 10:00 Z0784 Z0 Orlando — London	37h 26m including layover	Find flight from$191
12:34 — 12:50 +2 days	12:34 — 13:46 F92232 Frontier Airlines Ontario — Las Vegas 23h 34m stop 13:20 — 17:20 WS1401 WestJet Las Vegas — Calgary 3h 50m stop 21:10 — 12:50 WS18 WestJet Calgary — London	40h 16m including layover	Find flight from$263
17:30 — 12:50 +3 days	17:30 — 18:43 F92232 Frontier Airlines Ontario — Las Vegas 23h 47m stop 18:30 — 22:25 WS1585 WestJet Las Vegas — Calgary 22h 45m stop 21:10 — 12:50 WS18 WestJet Calgary — London	59h 20m including layover	Find flight from$295
17:44 — 10:00 +2 days	17:44 — 20:10 AS3498 Alaska Airlines Ontario — Portland 11h 5m stop 07:15 — 15:40 AS300 Alaska Airlines Portland — Orlando 5h 15m stop 20:55 — 10:00 Z0784 Z0 Orlando — London	32h 16m including layover	Find flight from$333
19:59 — 06:00 +2 days	19:58 — 21:04 F94206 Frontier Airlines Ontario — Las Vegas 1h 27m stop 22:37 — 06:30 F93238 Frontier Airlines Las Vegas — New York 11h 46m stop 18:15 — 06:00 Z0702 Z0 New York — London	26h 1m including layover	Find flight from$235
19:59 — 06:25 +2 days	22:58 — 23:59 F94206 Frontier Airlines Ontario — Las Vegas 1h 27m stop 22:34 — 06:30 F93238 Frontier Airlines Las Vegas — New York 12h 1m stop 18:30 — 06:25 VS4 Virgin Atlantic Airways New York — London	26h 26m including layover	Find flight from$274
20:27 — 10:55 +2 days	18:13 — 21:35 F92908 Frontier Airlines Ontario — Denver 15h 41m stop 15:40 — 06:05 FI670 Icelandair Denver — Reykjavik 1h 35m stop 07:40 — 10:55 FI470 Icelandair Reykjavik — London	30h 28m including layover	Find flight from$330
20:35 — 12:50 +3 days	20:35 — 21:54 F94206 Frontier Airlines Ontario — Las Vegas 20h 36m stop 18:30 — 22:25 WS1585 WestJet Las Vegas — Calgary 22h 45m stop 21:10 — 12:50 WS18 WestJet Calgary — London	56h 15m including layover	Find flight from$295

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

*Departure and arrival times - local. Updated on January 22, 2025

Flight Information

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

Distance between Ontario and London is 8723 miles. Time difference between the cities is 8h. Airplanes depart 00:58 to 22:59 from 2 Ontario airports and arrive 00:58 to 22:59 to 10 London airports. Average flight time is 22h 7m.

The fastest flight 12h 55m
Average flight time 22h 7m
The earliest flight 00:58
The latest flight 22:59
Distance 5421 ml

The cheapest months to travel to London are january (from 191 $), february (from 235 $), november (from 296 $).

The most expensive months are december (from 411 $), november (from 296 $), february (from 235 $).

What is the lowest airfare Ontario to London?

The cheapest plane ticket found by our users is $191. This airfare is for economy class on one-way F92232 flight by Frontier Airlines for January 22, 2025 which leaves Ontario Int. in Ontario at 12:34 am and arrives at London Gatwick at 10:00.

Economy class

$191

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Business class

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First class

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Popular Airlines on the Route

The flight Ontario — London is served by 7 regular airlines and 2 low-cost airlines. Most of the flights on this route are operated by Air Canada - 30 departures per week at the price of from $ 446 . And the most expensive tickets are offered by China Airlines airline - from $ 4940.

Direct flights

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

Connecting Flights

There are 138 flights with layovers on the route. The fastest connecting flight is BA6797 by British Airways takes 12h 55m and the cheapest is F92232 by Frontier Airlines for $191.

AS - Alaska Airlines

from $311

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AC - Air Canada

from $446

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F9 - Frontier Airlines

from $191

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CI - China Airlines

from $4940

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Y4 - Volaris

from $490

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UA - United Airlines

from $707

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BA - British Airways

from $388

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Airports

You can fly from Ontario to London from 2 airports (Ontario Int., International Heliport).

Ontario airports

Ontario Int.-ONT

from $191
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International Heliport-JIO

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London airports

London City-LCY

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London-Waterloo-QQW

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Heathrow-LHR

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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

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Gatwick-LGW

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Ebbsfleet International Rail St-XQE

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Stratford International Rail St-XOF

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Airplanes

There are flights to London from Ontario by 7 airlines that use 1 aircraft brands. They range from huge modern airplanes to small-sized.

Airbus A320-100/200

from $451

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Top Domestic Destinations from Ontario

You may also consider searching for discounted plane tickets to some other popular places from Ontario within United States.

Ontario — Tampa

from $54

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Ontario — Pittsburgh

from $70

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Ontario — Indianapolis

from $62

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Ontario — Cleveland

from $63

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Ontario — Norfolk

from $79

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Ontario — Tucson

from $80

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Ontario — New Orleans

from $63

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Ontario — San Jose

from $61

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Ontario — Honolulu

from $63

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Ontario — Austin

from $67

Find

Top International Destinations from Ontario

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.

Ontario — San Jose

from $61

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Ontario — Guadalajara

from $70

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Ontario — Mexico City

from $58

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Ontario — Cancun

from $74

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Ontario — Toronto

from $70

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Ontario — London

from $62

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Ontario — Vancouver

from $61

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How to book a plane ticket yourself?

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