London

$172+ 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 11/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LON
Nov 9 — Nov 161
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1. Tell us where you want to go
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The best prices from Ontario to London are usually found in January or April, booked 72 days in advance, depart on a Tuesday or Thursday 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 4, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

June

Cheapest in

January

Round-trip from

$548
(Kiwi.com)

One-way from

$172
(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 4, 2024.

This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/199:26 amONT - LGW
1 stop17h 09mMultiple Airlines
Tue 11/2612:00 pmLGW - ONT
1 stop29h 04mMultiple Airlines
Deal found 11/3$548
This United 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/410:35 amONT - LHR
1 stop17h 25mMultiple Airlines
Wed 12/111:00 pmLHR - ONT
2 stops42h 58mMultiple Airlines
Deal found 11/4$652
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.
Tue 12/36:10 amONT - LHR
1 stop17h 20mUnited Airlines
Tue 12/106:00 pmLHR - ONT
3 stops37h 58mUnited Airlines
Deal found 11/4$658
This Delta 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 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 11/4$662
This KLM deal was found by Cheapflights users on 11/3. 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.
Sun 11/1711:53 amONT - LHR
1 stop14h 42mKLM
Thu 3/2012:30 pmLHR - ONT
1 stop17h 28mKLM
Deal found 11/3$674
This Air Canada 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2510:35 amONT - LHR
2 stops15h 35mAir Canada
Sun 12/811:10 amLHR - ONT
2 stops20h 48mAir Canada
Deal found 11/4$721
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1910:38 pmONT - LGW
2 stops25h 27mAmerican Airlines
Tue 11/2611:20 amLGW - ONT
2 stops30h 27mAmerican Airlines
Deal found 11/4$742
This British Airways deal was found by Cheapflights users on 11/3. 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 12/47:15 amONT - LHR
1 stop15h 05mBritish Airways
Wed 12/117:25 amLHR - ONT
2 stops22h 48mBritish Airways
Deal found 11/3$756
This Iberia deal was found by Cheapflights users on 11/3. 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.
Wed 12/410:43 amONT - LHR
1 stop12h 37mIberia
Sun 12/86:20 amLHR - ONT
2 stops23h 53mIberia
Deal found 11/3$806
This Gurufare 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/26:05 amONT - LCY
2 stops20h 45mBritish Airways
Mon 12/162:45 pmLCY - ONT
2 stops35h 53mBritish Airways
Deal found 11/4$890
This Orbitz 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2011:29 amONT - LCY
2 stops22h 01mMultiple Airlines
Wed 11/276:50 amLCY - ONT
2 stops25h 09mMultiple Airlines
Deal found 11/4$961
This Virgin Atlantic deal was found by Cheapflights users on 11/3. 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 11/125:40 amONT - LHR
1 stop21h 30mVirgin Atlantic
Mon 12/21:15 pmLHR - ONT
1 stop17h 30mVirgin Atlantic
Deal found 11/3$1,007

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 2,455,398 searches. Data last updated November 4, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Sat 11/16

7:54 pm-10:35 am

1 stop30h 41m

$172

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 11/19

10:43 am-7:20 am

1 stop12h 37m

$402

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 12/8

5:50 am-11:10 am

1 stop21h 20m

$407

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 12/8

12:11 pm-10:35 am

1 stop14h 24m

$408

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 12/11

7:16 am-6:20 am

1 stop15h 04m

$411

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 12/3

1:18 pm-10:00 am

1 stop12h 42m

$412

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 11/18

6:00 am-11:05 am

2 stops21h 05m

$477

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 12/4

7:45 am-7:30 pm

2 stops27h 45m

$255

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 2/2

6:00 am-12:50 pm

3 stops22h 50m

$525

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 3/11

11:30 pm-2:35 pm

2 stops32h 05m

$773

Flights are sorted by cheapest first

Deals found on 11/4

Showing 1-10 of 29 results
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2
3

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.

  • Most accurate provider: When it comes to deals on Ontario-London flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-London flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-London flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to London

Have a flexible travel schedule? Discover the best time to fly to London from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Ontario to London

Get recent, data-driven insights about flights from Ontario to London including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Ontario to London?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to London. Price data was last updated on November 1, 2024.

To ensure you get the cheapest price possible for a flight from Ontario to London, you should look to book at least 72 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Ontario to London?

Currently, November is the cheapest month in which you can book a flight from Ontario to London (average of $649). Flying from Ontario to London in June is currently the most expensive (average of $1,089). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to LON?

Find hourly flight availability from Ontario to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 4, 2024.

It’s optimal to fly from Ontario to London in the evening. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Ontario to London?

Use this chart to determine the cheapest time to fly round-trip from Ontario to London. Price data was last updated on November 3, 2024.

Travelers seeking maximum savings on their Ontario to London flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated November 4, 2024.
Get a feel of what it's like to fly with Delta, KLM and Iberia from Ontario to London by reading reviews from past customers. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good
8,829 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

8.0
Very good
8,829 reviews
8.0
Very good
8,829 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

7.8
Good
1,350 reviews
8.0
Very good
8,829 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

7.6
Good
666 reviews
8.0
Very good
8,829 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

7.4
Good
1,532 reviews
8.0
Very good
8,829 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

7.4
Good
9,226 reviews
8.0
Very good
8,829 reviews

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Ontario to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from Ontario to London?

    Most people fly from Ontario (ONT) if they book a flight from Ontario to London. On average, Ontario has 0 outbound flights to London per day from 5 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

  • Can I find flights from Ontario to London for under $600 on Cheapflights?

    Yes, there are multiple flights from Ontario to London for under $600. The cheapest flight booked recently is on Multiple Airlines for just $548, but on average you can expect to pay $848.

  • Are there last-minute flights available from Ontario to London for under $1,000?

    There are currently 9+ open flights from Ontario to London within the next 7 days for less than $1,000.

  • What are the cheapest airlines flying from Ontario to London round-trip?

    Flying on United Airlines is currently your cheapest option to London, with prices starting at $652. Additional round-trip tickets that might be worth considering are offered by Delta and British Airways, with the lowest prices starting at $663 and $666, respectively. You may be able to fly from Ontario to London for 11% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Ontario to London one-way?

    The cheapest airlines for a one-way flight from Ontario to London are British Airways ($402), Virgin Atlantic ($407), and Delta ($408).

  • What are the most popular routes from Ontario to London?

  • What does ONT to LHR mean?

    ONT stands for Ontario Airport, while LHR stands for London Heathrow Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. London Gatwick Airport (LGW), London Stansted Airport (STN), London Luton Airport (LTN), London City Airport (LCY), London Southend Airport (SEN) are some additional IATA codes for airports related to your trip.

  • Can I find deals for flights from Ontario to London that include extra baggage allowance?

    The amount of baggage you can bring on your Ontario to London flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ontario to London with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to London flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Ontario to London that include hotel bookings?

    Yes. In addition to deals on Ontario to London flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to London.

  • Can I find deals for business class flights from Ontario to London?

    Yes. Cheapflights offers flight deals from Ontario to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Ontario to London that allow pets onboard?

    Many airlines flying from Ontario to London offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ontario to London?

    Yes, you can often find last-minute deals on Ontario to London flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Ontario to London flight deals updated?

    The Ontario to London flight deals you see on this page were last updated on 11/4.

  • What is the cheapest month to book a flight from Ontario to London?

    Currently, November is the cheapest month in which you can book a flight from Ontario to London (average of $649). Flying from Ontario to London in June is currently the most expensive (average of $1,089). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Ontario to London

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Ontario to London

Discover the top 5 airlines that operate flights from Ontario to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,455,398 searches. Data last updated November 4, 2024.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest$455Average$628FlexibilityNo cancel feeOn-time72%
DeltaCheapest$482Average$686FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$597Average$800FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$602Average$794FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$619Average$805FlexibilityNo cancel feeOn-time69%
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