Cheap Flights from Ontario, CA to London from $314

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On Cheapflightsplus.com you will find 57 connecting flights from Ontario to London. You can compare airfare deals from 5 airlines and multiple travel sites from $314, 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: $314 (one-way), $538 (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 $314. Take a look at the list of flights with layovers from Ontario to London from $314. There’re no direct flights. The fastest connecting flight – 12h 55m.

Price	Departure	Arrival	Flight Duration	Airline	Flight
from $410 Find flight	15:09 Ontario Ontario Int.	12:05+1 день London Heathrow	12h 56m layover 0h 55m - Dallas	British Airways	BA5111 BA1521
from $410 Find flight	11:04 Ontario Ontario Int.	09:40+1 день London Heathrow	14h 36m layover 2h 35m - Dallas	British Airways	BA5109 BA192
from $410 Find flight	11:04 Ontario Ontario Int.	12:05+1 день London Heathrow	17h 1m layover 5h 0m - Dallas	British Airways	BA5109 BA1521
from $414 Find flight	16:25 Ontario Ontario Int.	13:20+1 день London Heathrow	12h 55m layover 1h 49m - Phoenix	British Airways	BA6797 BA288
from $436 Find flight	11:04 Ontario Ontario Int.	06:20+2 дня London Heathrow	35h 16m layover 23h 20m - Dallas	British Airways	BA5109 BA1589
from $460 Find flight	11:04 Ontario Ontario Int.	08:15+1 день London Heathrow	13h 11m layover 1h 10m - Dallas	British Airways	BA5109 BA1531
from $504 Find flight	06:00 Ontario Ontario Int.	07:25+1 день London Heathrow	17h 25m layover 5h 21m - San Francisco	United Airlines	UA277 UA901
from $511 Find flight	20:27 Ontario Ontario Int.	09:35+2 дня London Heathrow	29h 8m layover 17h 31m - Denver	Frontier Airlines	F92908 BA218
from $314 Find flight	20:35 Ontario Ontario Int.	12:50+3 дня London Heathrow	56h 15m layover 20h 36m - Las Vegas 22h 45m - Calgary	Frontier Airlines	F94206 WS1585 WS18
from $314 Find flight	17:30 Ontario Ontario Int.	12:50+3 дня London Heathrow	59h 20m layover 23h 47m - Las Vegas 22h 45m - Calgary	Frontier Airlines	F92232 WS1585 WS18
from $340 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 $373 Find flight	07:36 Ontario Ontario Int.	12:50+1 день London Heathrow	21h 14m layover 4h 53m - San Francisco 3h 25m - Calgary	Frontier Airlines	F92677 WS1509 WS18
from $423 Find flight	11:04 Ontario Ontario Int.	14:00+1 день London Heathrow	18h 56m layover 1h 30m - Dallas 3h 5m - Madrid	British Airways	BA5109 BA1512 BA467
from $471 Find flight	06:00 Ontario Ontario Int.	07:10+1 день London Heathrow	17h 10m layover 1h 1m - San Francisco 2h 17m - Montreal	Air Canada	AC4080 AC760 AC866
from $476 Find flight	06:00 Ontario Ontario Int.	06:30+1 день London Heathrow	16h 30m layover 0h 56m - San Francisco 1h 53m - Toronto	Air Canada	AC4080 AC738 AC854
from $476 Find flight	06:00 Ontario Ontario Int.	08:30+1 день London Heathrow	18h 30m layover 0h 56m - San Francisco 3h 53m - Toronto	Air Canada	AC4080 AC738 AC856

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*Departure and arrival times - local. Prices indicated for one-way flights. Information updated on February 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$753
07:36 — 15:15 +1 day	07:36 — 09:02 F92677 Frontier Airlines Ontario — San Francisco 11h 38m stop 20:40 — 15:15 IB3627 Iberia San Francisco — London	23h 39m including layover	Find flight from$528
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$410
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$410
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$585
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$410
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$414
16:48 — 06:55 +2 days	16:48 — 21:52 F93132 Frontier Airlines Ontario — Houston 18h 3m stop 15:55 — 06:55 BA194 British Airways Houston — London	30h 7m including layover	Find flight from$567
17:30 — 14:55 +1 day	15:56 — 17:09 F92232 Frontier Airlines Ontario — Las Vegas 2h 12m stop 20:55 — 14:55 IB3617 Iberia Las Vegas — London	13h 25m including layover	Find flight from$788
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$340
06:00 — 10:55 +1 day	06:00 — 08:49 AS1091 Alaska Airlines Ontario — Seattle 5h 45m stop 14:35 — 06:15 FI680 Icelandair Seattle — Reykjavik 1h 25m stop 07:40 — 10:55 FI470 Icelandair Reykjavik — London	20h 55m including layover	Find flight from$340
07:36 — 12:50 +1 day	06:00 — 07:35 F92677 Frontier Airlines Ontario — San Francisco 4h 53m stop 13:55 — 17:44 WS1509 WestJet San Francisco — Calgary 3h 25m stop 21:10 — 12:50 WS18 WestJet Calgary — London	21h 14m including layover	Find flight from$373
10:06 — 12:50 +1 day	10:06 — 12:53 F93164 Frontier Airlines Ontario — Seattle 2h 22m stop 15:15 — 17:55 WS1553 WestJet Seattle — Calgary 3h 15m stop 21:10 — 12:50 WS18 WestJet Calgary — London	18h 44m including layover	Find flight from$505
15:09 — 18:15 +1 day	14:44 — 19:44 BA5111 British Airways Ontario — Dallas 1h 25m stop 22:05 — 14:25 BA4296 British Airways Dallas — Madrid 3h stop 16:45 — 18:15 BA7050 British Airways Madrid — London	19h 6m including layover	Find flight from$427
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$314
19:15 — 06:30 +2 days	18:28 — 20:01 AC4112 Air Canada Ontario — San Francisco 2h 1m stop 22:45 — 06:43 AC746 Air Canada San Francisco — Toronto 11h 27m stop 18:05 — 06:30 AC854 Air Canada Toronto — London	27h 15m including layover	Find flight from$476
19:15 — 06:30 +2 days	18:28 — 20:01 AC4112 Air Canada Ontario — San Francisco 2h 47m stop 23:27 — 07:30 AC4067 Air Canada San Francisco — Toronto 10h 40m stop 18:05 — 06:30 AC854 Air Canada Toronto — London	27h 15m including layover	Find flight from$546
20:27 — 10:50 +2 days	18:13 — 21:35 F92908 Frontier Airlines Ontario — Denver 15h 41m stop 15:40 — 06:05 FI670 Icelandair Denver — Reykjavik 1h 30m stop 07:35 — 10:50 FI450 Icelandair Reykjavik — London	30h 23m including layover	Find flight from$332
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$314
22:59 — 09:35 +2 days	22:59 — 01:27 F92404 Frontier Airlines Ontario — Phoenix 5h 18m stop 06:45 — 08:43 F91376 Frontier Airlines Phoenix — Denver 8h 47m stop 17:30 — 09:35 BA218 British Airways Denver — London	26h 36m including layover	Find flight from$563
22:59 — 06:50 +2 days	22:59 — 01:27 F92404 Frontier Airlines Ontario — Phoenix 4h 53m stop 06:20 — 10:42 F91736 Frontier Airlines Phoenix — Chicago 6h 18m stop 17:00 — 06:50 IB3633 Iberia Chicago — London	23h 51m including layover	Find flight from$597

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

*Departure and arrival times - local. Updated on February 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 05:05 to 22:59 from 2 Ontario airports and arrive 05:05 to 22:59 to 10 London airports. Average flight time is 23h 51m.

The fastest flight 12h 55m
Average flight time 23h 51m
The earliest flight 05:05
The latest flight 22:59
Distance 5421 ml

The cheapest months to travel to London are february (from 314 $), november (from 332 $), january (from 340 $).

The most expensive months are december (from 438 $), january (from 340 $), november (from 332 $).

What is the lowest airfare Ontario to London?

The cheapest plane ticket found by our users is $314. This airfare is for economy class on one-way F92232 flight by Frontier Airlines for February 21, 2025 which leaves Ontario Int. in Ontario at 17:30 am and arrives at London Heathrow at 12:50.

Economy class

$314

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First class

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Popular Airlines on the Route

The flight Ontario — London is served by 5 regular airlines and 1 low-cost airline. Most of the flights on this route are operated by Alaska Airlines - 6 departures per week at the price of from $ 340 . And the most expensive tickets are offered by Frontier Airlines airline - from $ 788.

Direct flights

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

Connecting Flights

There are 57 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 $314.

AS - Alaska Airlines

from $340

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AC - Air Canada

from $471

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F9 - Frontier Airlines

from $314

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UA - United Airlines

from $504

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BA - British Airways

from $410

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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 $314
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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 5 airlines that use 0 aircraft brands. They range from huge modern airplanes to small-sized.

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

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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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