London

$161+ Cheap flights from Ontario (ONT) to London (LON)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LON
Nov 11 — Nov 181
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to London with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Ontario to London are usually found in January or April, booked 72 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Ontario to London

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 6, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

January

Round-trip from

$501
(Trip.com)

One-way from

$161
(Trip.com)
Provider with most accurate pricing for Ontario-London (LON) flight deals.
Provider most trusted by Cheapflights users for Ontario-London (LON) flights.
High demand for flights, 34% potential price rise
Best time to find cheap flights, 15% potential price drop
From Ontario to London (LON)
One-way flight from Ontario to London (LON)

Find flight deals from Ontario to London

Cheapest flights from Ontario to London
Explore the most affordable flight options available from Ontario to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 6, 2024.

This Trip.com deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/512:38 pmONT - LGW
1 stop13h 57mMultiple Airlines
Thu 12/1212:00 pmLGW - ONT
1 stop27h 14mMultiple Airlines
Deal found 11/5$501
This Delta deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/181:18 pmONT - LHR
1 stop12h 42mDelta
Wed 12/410:45 amLHR - ONT
1 stop13h 34mDelta
Deal found 11/6$637
This KLM deal was found by Cheapflights users on 11/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1112:11 pmONT - LHR
1 stop14h 24mKLM
Wed 12/183:50 pmLHR - ONT
1 stop14h 52mKLM
Deal found 11/6$646
This Iberia deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/97:16 amONT - LHR
1 stop15h 04mIberia
Wed 1/297:25 amLHR - ONT
2 stops22h 51mIberia
Deal found 11/5$656
This Virgin Atlantic deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/197:10 amONT - LHR
1 stop15h 10mVirgin Atlantic
Thu 12/56:30 amLHR - ONT
2 stops24h 15mVirgin Atlantic
Deal found 11/5$663
This Booking.com deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/45:05 amONT - LHR
2 stops18h 05mAir Canada
Wed 12/111:00 pmLHR - ONT
2 stops18h 58mAir Canada
Deal found 11/4$666
This American Airlines deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/206:05 amONT - LGW
2 stops18h 00mAmerican Airlines
Thu 12/512:30 pmLGW - ONT
2 stops33h 23mAmerican Airlines
Deal found 11/5$679
This British Airways deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/114:25 pmONT - LHR
1 stop12h 55mBritish Airways
Tue 1/288:10 amLHR - ONT
2 stops22h 06mBritish Airways
Deal found 11/5$691
This Trip.com deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/512:38 pmONT - LHR
2 stops20h 12mMultiple Airlines
Thu 12/1212:10 pmLHR - ONT
2 stops27h 04mMultiple Airlines
Deal found 11/5$834
This Iberia deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/910:41 amONT - LGW
2 stops24h 09mIberia
Thu 1/3010:55 amLGW - ONT
2 stops21h 03mIberia
Deal found 11/5$867
This United Airlines deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/46:10 amONT - LHR
3 stops20h 05mUnited Airlines
Thu 12/129:30 amLHR - ONT
2 stops22h 28mUnited Airlines
Deal found 11/4$994
This British Airways deal was found by Cheapflights users on 11/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/512:53 pmONT - LGW
2 stops45h 57mBritish Airways
Thu 12/127:35 pmLGW - ONT
2 stops50h 18mBritish Airways
Deal found 11/5$1,004

Find flights from Ontario to London within your budget

Customize your flight search to find flights from Ontario to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,552,551 searches. Data last updated November 6, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Mon 12/9

9:23 pm-10:35 am

1 stop29h 12m

$161

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 1/15

1:00 pm-11:40 am

1 stop14h 40m

$398

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 12/4

11:53 am-10:35 am

1 stop14h 42m

$402

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 11/26

2:53 pm-12:05 pm

1 stop13h 12m

$411

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 11/26

10:43 am-7:20 am

1 stop12h 37m

$412

OntarioLondon

ONT - LCY

ONTLCY

Ontario

Wed 12/4

7:10 am-9:30 am

2 stops18h 20m

$446

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 12/5

8:59 pm-12:50 pm

2 stops55h 51m

$254

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 11/12

10:10 am-10:25 am

2 stops16h 15m

$544

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 2/20

7:45 am-12:50 pm

3 stops21h 05m

$578

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 4/7

11:30 pm-3:35 pm

2 stops32h 05m

$753

Flights are sorted by cheapest first

Deals found on 11/5

Showing 1-10 of 31 results
1
2
3
4

Compare providers for flights from Ontario to London

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to London in November.
ProviderPrice AccuracyTrust Score*Cancellation Policy
ExpediaPrice Accuracy1 starTrust Score*3 starsCancellation PolicyAirline Policy
FlightHubPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy
AranGrantPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy
eDreamsPrice Accuracy3 starsTrust Score*3 starsCancellation PolicyAirline Policy

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.