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

American Airlines, at £495, was found to be the cheapest airline from Ontario to London.Alternate airlines flying return to your destination include United Airlines and British Airways. Users have found that American Airlines is 11% cheaper than the other options available to this destination.

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

£306 is the cheapest one-way deal found within the past few days, from Virgin Atlantic. You may also be able to find cheap deals on British Airways and KLM, with prices starting from £313 and £317, respectively.

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

Travellers seeking maximum savings on their Ontario to London flight should consider departing on Thursday at midday when fares are most often at their lowest. Thursday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular routes from Ontario to London?

When deciding which route to take from Ontario to London consider Ontario - London Heathrow, Ontario - London Gatwick or Ontario - London City as they are the most popular.

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

To save up to 16% on this flight, we recommend booking at least 31 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Ontario to London from £536 1-2 weeks out and tickets from £755 for flights departing within the next 72 hours.

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

Flights from Ontario to London lean towards being more expensive in June. Prices are generally better when you fly from Ontario to London in April, with the cheapest ticket starting at £351.

What airport do you fly from for flights from Ontario to London?

Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to London. 0 airlines have flights from Ontario to London on a regular basis. Booking flights from Ontario to London should not be difficult; the airport handles an average of 0 outbound flights to London per day.

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 holiday 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.

£154+ Flights from Ontario, California to London, England

Cheap flight deals from Ontario to London

Round-trip from	£487
One-way from	£154
Popular in	June
Cheapest in	April

16/1-19/1
2 total stops
34h 28m total
Ontario to London

Search Deals

3/11
1 total stop
14h 13m total
Ontario to London

Search Deals

High demand for flights, 34% potential price rise

Search Deals

Best time to find cheap flights, 15% potential price drop

Search Deals

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 30 October 2024.

Wed 4/1206:10ONT - LHR

1 stop17h 20mUnited Airlines

Thu 12/1215:00LHR - ONT

2 stops37h 47mUnited Airlines

Deal found 29/10£503

Tue 19/1111:53ONT - LHR

1 stop15h 47mKLM

Tue 26/1106:30LHR - ONT

2 stops18h 15mKLM

Deal found 29/10£511

Mon 18/1113:18ONT - LHR

1 stop12h 42mDelta

Wed 4/1210:45LHR - ONT

1 stop13h 34mDelta

Deal found 29/10£513

Sun 8/1206:10ONT - LGW

2 stops18h 50mAmerican Airlines

Sun 26/111:20LGW - ONT

2 stops30h 40mAmerican Airlines

Deal found 29/10£534

Thu 28/1113:55ONT - LHR

2 stops32h 35mAir Canada

Tue 10/1213:00LHR - ONT

2 stops33h 33mAir Canada

Deal found 29/10£537

Sun 1/1205:40ONT - LHR

1 stop23h 00mVirgin Atlantic

Sun 15/1209:10LHR - ONT

2 stops23h 03mVirgin Atlantic

Deal found 29/10£562

Thu 28/1107:10ONT - LCY

2 stops16h 05mDelta

Thu 12/1209:20LCY - ONT

2 stops21h 42mDelta

Deal found 29/10£592

Sat 16/1110:43ONT - LHR

1 stop12h 37mIberia

Sun 24/1113:50LHR - ONT

1 stop16h 24mIberia

Deal found 29/10£597

Sun 24/1110:35ONT - LHR

2 stops15h 35mMultiple Airlines

Wed 11/1211:10LHR - ONT

2 stops17h 37mMultiple Airlines

Deal found 29/10£601

Thu 7/1112:32ONT - LGW

1 stop14h 03mMultiple Airlines

Tue 19/1116:10LGW - ONT

2 stops57h 52mMultiple Airlines

Deal found 29/10£634

Tue 17/1216:25ONT - LHR

1 stop12h 55mBritish Airways

Wed 25/1209:25LHR - ONT

1 stop17h 09mBritish Airways

Deal found 28/10£689

Sun 10/1114:53ONT - LGW

2 stops19h 57mIberia

Fri 15/1111:00LGW - ONT

2 stops20h 57mIberia

Deal found 29/10£854

Best flights from Ontario to London
Discover carefully curated flight deals from Ontario to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 30 October 2024.

Thu 16/108:06ONT - LGW

1 stop18h 29mMultiple Airlines

Sun 19/112:00LGW - ONT

1 stop15h 59mMultiple Airlines

Deal found 27/10£487

Wed 4/1206:05ONT - LGW

2 stops18h 55mAmerican Airlines

Thu 12/1212:30LGW - ONT

2 stops29h 21mAmerican Airlines

Deal found 28/10£495

Wed 4/1206:10ONT - LHR

1 stop20h 40mUnited Airlines

Thu 12/1215:00LHR - ONT

2 stops37h 47mUnited Airlines

Deal found 28/10£503

Tue 11/216:25ONT - LHR

1 stop12h 55mBritish Airways

Tue 25/214:30LHR - ONT

1 stop15h 13mBritish Airways

Deal found 28/10£507

Wed 26/205:05ONT - LHR

2 stops18h 05mAir Canada

Thu 6/315:00LHR - ONT

2 stops37h 17mAir Canada

Deal found 28/10£511

Mon 11/1113:18ONT - LHR

1 stop12h 42mDelta

Tue 26/1110:45LHR - ONT

1 stop13h 34mDelta

Deal found 28/10£512

Sun 8/1212:11ONT - LHR

1 stop14h 24mKLM

Tue 4/210:45LHR - ONT

1 stop13h 38mKLM

Deal found 28/10£520

Mon 11/1110:43ONT - LHR

1 stop12h 37mIberia

Tue 22/412:00LHR - ONT

1 stop16h 03mIberia

Deal found 28/10£522

Sun 1/1205:40ONT - LHR

1 stop23h 00mVirgin Atlantic

Sun 15/1209:10LHR - ONT

2 stops23h 03mVirgin Atlantic

Deal found 29/10£562

Wed 12/216:25ONT - LHR

1 stop12h 55mAmerican Airlines

Wed 19/214:30LHR - ONT

1 stop15h 13mAmerican Airlines

Deal found 28/10£521

Thu 14/1114:53ONT - LGW

2 stops19h 57mIberia

Thu 21/1111:00LGW - ONT

2 stops20h 57mIberia

Deal found 28/10£553

Mon 20/110:51ONT - LHR

1 stop14h 49mMultiple Airlines

Mon 27/114:30LHR - ONT

1 stop26h 39mMultiple Airlines

Deal found 29/10£563

Last-minute flights from Ontario to London
Discover last-minute flight deals from Ontario to London. Data last updated 30 October 2024 and is based on user searches.

Wed 30/1011:15ONT - LHR

1 stop18h 25mKLM

Thu 5/1206:30LHR - ONT

2 stops18h 15mKLM

Deal found 29/10£718

Thu 31/1006:15ONT - LHR

1 stop21h 55mVirgin Atlantic

Sat 2/1106:20LHR - ONT

2 stops23h 19mVirgin Atlantic

Deal found 28/10£788

Mon 4/1105:45ONT - LHR

1 stop19h 50mMultiple Airlines

Mon 11/1112:25LHR - ONT

2 stops28h 08mMultiple Airlines

Deal found 28/10£649

Tue 5/1107:04ONT - LCY

2 stops17h 46mDelta

Tue 26/1110:00LCY - ONT

2 stops21h 01mDelta

Deal found 29/10£1,537

Thu 7/1112:32ONT - LGW

1 stop14h 03mMultiple Airlines

Tue 19/1116:10LGW - ONT

2 stops57h 52mMultiple Airlines

Deal found 29/10£634

Thu 7/1107:15ONT - LGW

2 stops43h 00mIberia

Tue 19/1111:00LGW - ONT

2 stops43h 14mIberia

Deal found 29/10£957

Thu 7/1106:00ONT - LCY

2 stops26h 40mMultiple Airlines

Tue 19/1117:15LCY - ONT

2 stops36h 47mMultiple Airlines

Deal found 29/10£1,305

Sun 10/1114:53ONT - LGW

2 stops19h 57mIberia

Fri 15/1111:00LGW - ONT

2 stops20h 57mIberia

Deal found 29/10£854

Mon 11/1113:18ONT - LHR

1 stop12h 42mDelta

Tue 26/1110:45LHR - ONT

1 stop13h 34mDelta

Deal found 28/10£512

Mon 11/1110:43ONT - LHR

1 stop12h 37mIberia

Tue 22/412:00LHR - ONT

1 stop16h 03mIberia

Deal found 28/10£522

Mon 11/1106:05ONT - LHR

1 stop17h 15mBritish Airways

Mon 18/1108:20LHR - ONT

1 stop18h 13mBritish Airways

Deal found 28/10£558

Tue 12/1105:05ONT - LHR

2 stops18h 05mAir Canada

Tue 19/1114:30LHR - ONT

2 stops38h 14mAir Canada

Deal found 29/10£503

One-way flights from Ontario to London
Search for one-way flight options from Ontario to London. Find affordable one-way fares based on user searches. Data last updated 30 October 2024.

Sun 3/1112:22ONT - LGW

1 stop14h 13mMultiple Airlines

Deal found 28/10£154

Sat 1/208:04ONT - LHR

2 stops20h 46mMultiple Airlines

Deal found 29/10£216

Sat 1/219:59ONT - LCY

3 stops31h 01mMultiple Airlines

Deal found 29/10£263

Tue 12/1105:40ONT - LHR

1 stop21h 30mVirgin Atlantic

Deal found 29/10£306

Mon 25/1116:25ONT - LHR

1 stop12h 55mBritish Airways

Deal found 29/10£313

Sun 2/212:39ONT - LHR

1 stop13h 56mKLM

Deal found 28/10£317

Sun 27/415:03ONT - LHR

2 stops19h 12mIberia

Deal found 28/10£327

Sun 17/1112:53ONT - LGW

2 stops21h 57mIberia

Deal found 28/10£327

Sat 30/1113:18ONT - LHR

1 stop12h 42mDelta

Deal found 28/10£353

Wed 27/1113:55ONT - LHR

1 stop14h 05mUnited Airlines

Deal found 28/10£367

Fri 31/107:00ONT - LCY

2 stops17h 10mDelta

Deal found 29/10£390

Sat 1/207:45ONT - LHR

3 stops21h 05mWestJet

Deal found 29/10£397

Find flights from Ontario to London within your budget

Fly from

Fly to

Budget

£487 - £563

Route

Depart

Return

Price

OntarioLondon Gatwick

ONT - LGW

ONTLGW

Ontario

Thu 16/1

1 stop18h 29m

London Gatwick

Sun 19/1

1 stop15h 59m

£487

OntarioLondon Gatwick

ONT - LGW

ONTLGW

Ontario

Wed 4/12

2 stops18h 55m

London Gatwick

Thu 12/12

2 stops29h 21m

£495

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Wed 4/12

1 stop20h 40m

London Heathrow

Thu 12/12

2 stops37h 47m

£503

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Tue 11/2

1 stop12h 55m

London Heathrow

Tue 25/2

1 stop15h 13m

£507

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Wed 26/2

2 stops18h 05m

London Heathrow

Thu 6/3

2 stops37h 17m

£511

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Mon 11/11

1 stop12h 42m

London Heathrow

Tue 26/11

1 stop13h 34m

£512

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Sun 8/12

1 stop14h 24m

London Heathrow

Tue 4/2

1 stop13h 38m

£520

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Wed 12/2

1 stop12h 55m

London Heathrow

Wed 19/2

1 stop15h 13m

£521

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Mon 11/11

1 stop12h 37m

London Heathrow

Tue 22/4

1 stop16h 03m

£522

OntarioLondon Gatwick

ONT - LGW

ONTLGW

Ontario

Thu 14/11

2 stops19h 57m

London Gatwick

Thu 21/11

2 stops20h 57m

£553

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Sun 1/12

1 stop23h 00m

London Heathrow

Sun 15/12

2 stops23h 03m

£562

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Mon 20/1

1 stop14h 49m

London Heathrow

Mon 27/1

1 stop26h 39m

£563

Flights are sorted by cheapest first

Deals found on 27/10

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 return 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?

Booking 72 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Find deals

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

Currently, January is the cheapest month in which you can book a flight from Ontario to London (average of £112). Flying from Ontario to London in July is currently the most expensive (average of £159). 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?

One of the essential ways to save on airfare from Ontario to London is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the morning could potentially save you up to 20% on airfare.

Rainfall in London by month

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Temperature in London 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing London

Get a feel of what it's like to fly with United Airlines, British Airways and Air Canada from Ontario to London by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

8,845 reviews

Check prices

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Delta

8.0

Very Good

8,845 reviews

Delta

8.0

Very Good

8,845 reviews

Check prices

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

KLM

7.8

Good

1,352 reviews

Delta

8.0

Very Good

8,845 reviews

Check prices

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Virgin Atlantic

7.6

Good

667 reviews

Delta

8.0

Very Good

8,845 reviews

Check prices

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

United Airlines

7.4

Good

9,249 reviews

Delta

8.0

Very Good

8,845 reviews

Check prices

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

WestJet

7.3

Good

2,804 reviews

Delta

8.0

Very Good

8,845 reviews

Check prices

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Related info for your journey

What airport do you fly from for flights from Ontario to London?
Ontario (ONT), located 3.1 mi from the city center, is the airport you fly out of when you book flights from Ontario to London. 0 airlines have flights from Ontario to London on a regular basis. Booking flights from Ontario to London should not be difficult; the airport handles an average of 0 outbound flights to London per day.
What are the cheapest airlines flying from Ontario to London round-trip?
American Airlines, at £495, was found to be the cheapest airline from Ontario to London.Alternate airlines flying return to your destination include United Airlines and British Airways. Users have found that American Airlines is 11% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from Ontario to London one-way?
£306 is the cheapest one-way deal found within the past few days, from Virgin Atlantic. You may also be able to find cheap deals on British Airways and KLM, with prices starting from £313 and £317, respectively.
What are the most popular routes from Ontario to London?
When deciding which route to take from Ontario to London consider Ontario - London Heathrow, Ontario - London Gatwick or Ontario - London City as they are the most popular.
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 holiday 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.
What is the cheapest month to book a flight from Ontario to London?
Currently, January is the cheapest month in which you can book a flight from Ontario to London (average of £112). Flying from Ontario to London in July is currently the most expensive (average of £159). 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

Browse thousands of different options on Cheapflights for your next trip

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How does Cheapflights help users find flights from Ontario to London?

Cheapflights helps you search for flights from Ontario to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Ontario to London?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to London for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ontario to London with no change fees?

Yes! Cheapflights helps users easily find flights from Ontario to London with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to London become cheaper?

Yes! Start tracking prices for Ontario to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from Ontario to London from £154

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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to London

Round-trip from

One-way from

Popular in

Cheapest in

Find flight deals from Ontario to London

Cheapest flights from Ontario to LondonExplore 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 30 October 2024.

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 30 October 2024.

Find flights from Ontario to London within your budget

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.

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 return flight from Ontario to London. Price data was last updated on 25 October 2024.

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

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 30 October 2024.

Rainfall in London by month

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

Temperature in London by month

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

Reviews of airlines servicing London

Get a feel of what it's like to fly with United Airlines, British Airways and Air Canada from Ontario to London by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

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

What are the most popular routes from Ontario to London?

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

How can I find direct flights from Ontario to London?

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to London

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

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to London?

Why should you use Cheapflights to find cheap flight tickets from Ontario to London?

Can Cheapflights find flights from Ontario to London with no change fees?

Can Cheapflights notify me if prices for flights from Ontario to London become cheaper?

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Travel Smart

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 30 October 2024.