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Cheap flights from Ontario (ONT) to Heathrow (LHR) from $401

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 11/13. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ONT — LHR
Jun 7 — Jun 141
From?
To?
Fri 6/7
Fri 6/14
1 adult, Economy
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The best prices from Ontario to London Heathrow are usually found in April or December, booked 27 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap flight deals from Ontario to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Heathrow (LHR). 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 June 2, 2024.

Popular in

July

Cheapest in

April

Round-trip from

$643

One-way from

$434
High demand for flights, 26% potential price rise
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Best time to find cheap flights, 13% potential price drop
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From Ontario to London Heathrow
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One-way flight from Ontario to London Heathrow
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What is the cheapest day to fly round-trip from Ontario to London Heathrow Airport?

Sunday flights are generally found to be more expensive for flights from Ontario to London Heathrow Airport. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London Heathrow Airport.

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

Find a great deal and save up to 27% by booking at least 15 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ontario to London Heathrow Airport within the next two weeks, with the cheapest ticket starting at $760.

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

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, October can be a great choice for travel to London Heathrow Airport. Flights to London Heathrow Airport from Ontario in October are about $714 on average during October, but can be found for as low as $433.

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

It’s typically best to fly out from Ontario to London Heathrow Airport in the morning. Doing so could potentially save you 31% on the flight price compared to flying in the evening, which is usually more expensive.

Cheap United Airlines flights from Ontario to Heathrow

Explore cheap flight options specifically provided by United Airlines for the route between Ontario and Heathrow. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
Consider these cheap United Airlines flights we've found departing from Ontario to London. Be sure to come back soon if the deals available don't appeal to you at this time.
Wed 7/311:30 pmONT - LHR
1 stop14h 50mUnited Airlines
Tue 8/272:50 pmLHR - ONT
1 stop14h 12mUnited Airlines
Deal found 6/1$629
Mon 9/21:35 pmONT - LHR
1 stop14h 45mUnited Airlines
Thu 9/1211:05 amLHR - ONT
1 stop14h 17mUnited Airlines
Deal found 6/1$637
Mon 8/197:40 amONT - LHR
1 stop15h 15mUnited Airlines
Wed 8/282:50 pmLHR - ONT
1 stop14h 12mUnited Airlines
Deal found 5/31$638
Sat 9/217:40 amONT - LHR
1 stop15h 15mUnited Airlines
Thu 10/34:15 pmLHR - ONT
1 stop14h 41mUnited Airlines
Deal found 6/1$652
Tue 8/131:47 pmONT - LHR
1 stop12h 38mUnited Airlines
Tue 8/201:40 pmLHR - ONT
1 stop15h 51mUnited Airlines
Deal found 6/1$672
Thu 8/81:45 pmONT - LHR
1 stop12h 40mUnited Airlines
Thu 8/291:40 pmLHR - ONT
1 stop15h 51mUnited Airlines
Deal found 6/1$687
Sat 8/101:45 pmONT - LHR
2 stops14h 35mUnited Airlines
Thu 8/2911:05 amLHR - ONT
1 stop14h 17mUnited Airlines
Deal found 5/31$688
Wed 10/161:30 pmONT - LHR
1 stop12h 10mUnited Airlines
Fri 10/254:15 pmLHR - ONT
1 stop14h 41mUnited Airlines
Deal found 6/1$802
Mon 6/106:25 pmONT - LHR
1 stop33h 55mUnited Airlines
Wed 6/194:15 pmLHR - ONT
1 stop14h 12mUnited Airlines
Deal found 6/1$835

Cheap American Airlines flights from Ontario to Heathrow

Explore cheap flight options specifically provided by American Airlines for the route between Ontario and Heathrow. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
Browse through some of the cheapest American Airlines flights traveling from Ontario to London. Deals frequently update to provide users with more options.
Tue 11/56:34 amONT - LHR
1 stop15h 46mAmerican Airlines
Thu 11/2111:50 amLHR - ONT
1 stop16h 23mAmerican Airlines
Deal found 5/31$561
Tue 11/511:11 pmONT - LHR
2 stops14h 59mAmerican Airlines
Thu 11/2111:15 amLHR - ONT
2 stops18h 28mAmerican Airlines
Deal found 5/31$566
Tue 10/2910:56 amONT - LHR
2 stops14h 49mAmerican Airlines
Fri 11/88:20 amLHR - ONT
1 stop23h 47mAmerican Airlines
Deal found 6/1$567
Wed 8/2110:46 amONT - LHR
2 stops15h 34mAmerican Airlines
Fri 9/131:05 pmLHR - ONT
1 stop14h 39mAmerican Airlines
Deal found 6/1$592
Thu 9/197:23 pmONT - LHR
2 stops15h 22mAmerican Airlines
Mon 9/308:10 amLHR - ONT
2 stops18h 20mAmerican Airlines
Deal found 6/1$667
Tue 10/14:53 pmONT - LHR
1 stop12h 42mAmerican Airlines
Tue 10/153:15 pmLHR - ONT
1 stop14h 45mAmerican Airlines
Deal found 6/2$725
Wed 8/2110:46 amONT - LHR
1 stop13h 09mAmerican Airlines
Mon 8/269:45 amLHR - ONT
1 stop14h 15mAmerican Airlines
Deal found 6/1$862
Sun 6/912:49 pmONT - LHR
1 stop17h 36mAmerican Airlines
Sun 6/1612:00 pmLHR - ONT
1 stop18h 09mAmerican Airlines
Deal found 6/2$1,089
Sat 6/82:44 pmONT - LHR
1 stop14h 01mAmerican Airlines
Sat 6/158:40 amLHR - ONT
1 stop18h 17mAmerican Airlines
Deal found 6/1$1,137

Cheap Ontario to Heathrow flights in June & July 2024

Find cheap flight options from Ontario to Heathrow specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,807,690 searches. Prices were last updated on June 2, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to London in 2024. For more flight deals, be sure to check back very soon.
Sun 6/231:29 pmONT - LHR
1 stop14h 51mUnited Airlines
Fri 9/204:15 pmLHR - ONT
1 stop16h 30mUnited Airlines
Deal found 6/1$808
Mon 6/246:00 amONT - LHR
1 stop17h 40mUnited Airlines
Fri 8/232:50 pmLHR - ONT
2 stops27h 17mUnited Airlines
Deal found 6/1$835
Mon 6/241:29 pmONT - LHR
1 stop14h 51mUnited Airlines
Fri 8/231:40 pmLHR - ONT
1 stop15h 51mUnited Airlines
Deal found 6/2$836
Wed 6/121:29 pmONT - LHR
1 stop14h 51mUnited Airlines
Wed 6/192:50 pmLHR - ONT
1 stop13h 58mUnited Airlines
Deal found 6/2$843
Sat 6/291:30 pmONT - LHR
1 stop14h 50mUnited Airlines
Tue 1/2110:05 amLHR - ONT
1 stop15h 55mUnited Airlines
Deal found 6/1$850
Mon 6/2412:49 pmONT - LHR
2 stops15h 26mAmerican Airlines
Fri 8/231:40 pmLHR - ONT
2 stops16h 00mAmerican Airlines
Deal found 6/2$851
Wed 6/261:29 pmONT - LHR
1 stop14h 51mUnited Airlines
Sun 10/2010:25 amLHR - ONT
1 stop15h 18mUnited Airlines
Deal found 6/1$858
Mon 6/247:05 amONT - LHR
2 stops17h 00mDelta
Fri 8/239:55 amLHR - ONT
2 stops22h 04mDelta
Deal found 6/1$874
Sat 6/81:29 pmONT - LHR
1 stop14h 51mUnited Airlines
Tue 6/1811:05 amLHR - ONT
1 stop14h 23mUnited Airlines
Deal found 6/1$886

Ontario to Heathrow 2024 flight deals

Discover exclusive flight deals for travel between Ontario and Heathrow in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to London in 2024. For more flight deals, be sure to check back very soon.
Tue 11/56:34 amONT - LHR
1 stop16h 46mIberia
Thu 11/2111:25 amLHR - ONT
2 stops20h 42mIberia
Deal found 5/31$545
Tue 11/56:34 amONT - LHR
1 stop15h 46mAmerican Airlines
Thu 11/2111:50 amLHR - ONT
1 stop16h 23mAmerican Airlines
Deal found 5/31$561
Tue 10/154:45 pmONT - LHR
1 stop12h 50mBritish Airways
Wed 11/1311:55 amLHR - ONT
1 stop13h 57mBritish Airways
Deal found 6/1$562
Tue 10/110:50 amONT - LHR
1 stop13h 10mIberia
Tue 10/84:25 pmLHR - ONT
1 stop15h 01mIberia
Deal found 5/31$563
Tue 11/511:11 pmONT - LHR
2 stops14h 59mAmerican Airlines
Thu 11/2111:15 amLHR - ONT
2 stops18h 28mAmerican Airlines
Deal found 5/31$566
Tue 10/2910:56 amONT - LHR
2 stops14h 49mAmerican Airlines
Fri 11/88:20 amLHR - ONT
1 stop23h 47mAmerican Airlines
Deal found 6/1$567
Sun 8/188:10 amONT - LHR
1 stop14h 15mIberia
Wed 8/2810:50 amLHR - ONT
2 stops19h 37mIberia
Deal found 6/2$570
Sun 9/18:10 amONT - LHR
1 stop18h 35mBritish Airways
Tue 10/18:20 amLHR - ONT
2 stops19h 24mBritish Airways
Deal found 6/1$577
Sat 8/3110:46 amONT - LHR
1 stop35h 39mBritish Airways
Tue 9/246:55 amLHR - ONT
2 stops20h 49mBritish Airways
Deal found 6/1$584

Ontario to Heathrow flights leaving soon

Find last-minute flight options from Ontario to Heathrow for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
Have a look at some of the flights available from Ontario to London departing last-minute. Tip: verify your flight details before completing your reservation.
Mon 6/106:25 pmONT - LHR
1 stop33h 55mUnited Airlines
Wed 6/194:15 pmLHR - ONT
1 stop14h 12mUnited Airlines
Deal found 6/1$835
Wed 6/121:29 pmONT - LHR
1 stop14h 51mUnited Airlines
Wed 6/192:50 pmLHR - ONT
1 stop13h 58mUnited Airlines
Deal found 6/2$843
Sat 6/81:29 pmONT - LHR
1 stop14h 51mUnited Airlines
Tue 6/1811:05 amLHR - ONT
1 stop14h 23mUnited Airlines
Deal found 6/1$886
Sun 6/91:29 pmONT - LHR
1 stop14h 51mUnited Airlines
Sun 6/164:15 pmLHR - ONT
1 stop14h 12mUnited Airlines
Deal found 6/2$893
Wed 6/121:29 pmONT - LHR
1 stop14h 51mUnited Airlines
Thu 6/202:50 pmLHR - ONT
1 stop13h 58mUnited Airlines
Deal found 6/1$906
Sat 6/81:29 pmONT - LHR
1 stop14h 51mUnited Airlines
Sat 6/154:15 pmLHR - ONT
1 stop14h 12mUnited Airlines
Deal found 6/1$936
Tue 6/116:00 amONT - LHR
1 stop21h 35mUnited Airlines
Fri 6/212:50 pmLHR - ONT
1 stop13h 58mUnited Airlines
Deal found 6/1$1,014
Tue 6/115:15 amONT - LHR
2 stops19h 05mUnited Airlines
Fri 6/2810:25 amLHR - ONT
1 stop20h 20mUnited Airlines
Deal found 6/2$1,019
Tue 6/116:00 amONT - LHR
1 stop17h 40mUnited Airlines
Wed 6/1911:05 amLHR - ONT
1 stop14h 23mUnited Airlines
Deal found 6/1$1,043

One-way flights to Heathrow from Ontario

Search for one-way flight options from Ontario to Heathrow. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,807,690 searches. Data last updated June 2, 2024.
Users in need of a one-way flight from Ontario to London can choose from these deals. Users in need of a round-trip flight from Ontario to London instead should update the search form at the top of page.
Wed 11/136:34 amONT - LHR
1 stop15h 46mIberia
Deal found 6/1$401
Wed 10/22:44 pmONT - LHR
1 stop14h 01mAmerican Airlines
Deal found 6/1$408
Sun 9/17:40 amONT - LHR
1 stop22h 30mUnited Airlines
Deal found 5/31$413
Sun 8/2510:49 amONT - LHR
1 stop15h 36mUnited Airlines
Deal found 6/1$414
Mon 9/97:40 amONT - LHR
1 stop22h 30mUnited Airlines
Deal found 6/1$415
Mon 8/126:00 amONT - LHR
1 stop17h 40mUnited Airlines
Deal found 6/2$418
Sat 8/246:45 pmONT - LHR
1 stop35h 25mUnited Airlines
Deal found 6/1$420
Wed 11/136:00 amONT - LHR
2 stops17h 30mUnited Airlines
Deal found 6/1$422
Sun 10/65:15 amONT - LHR
2 stops16h 40mUnited Airlines
Deal found 6/1$428

Find flights from Ontario to Heathrow within your budget

Customize your flight search to find flights from Ontario to Heathrow 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 2,807,690 searches. Data last updated June 2, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$545 - $905

Route

Depart

Return

Price

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Tue 11/5

1 stop16h 46m

London Heathrow

Thu 11/21

2 stops20h 42m

$545

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Tue 11/5

1 stop15h 46m

London Heathrow

Thu 11/21

1 stop16h 23m

$561

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Tue 10/15

1 stop12h 50m

London Heathrow

Wed 11/13

1 stop13h 57m

$562

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Wed 10/9

1 stop12h 18m

London Heathrow

Wed 10/16

1 stop15h 47m

$602

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Tue 11/5

2 stops15h 48m

London Heathrow

Tue 11/26

2 stops19h 21m

$607

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Wed 7/31

1 stop14h 50m

London Heathrow

Tue 8/27

1 stop14h 12m

$629

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Mon 9/16

2 stops18h 20m

London Heathrow

Thu 9/26

2 stops21h 16m

$643

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Fri 9/20

1 stop13h 09m

London Heathrow

Fri 10/11

1 stop18h 26m

$743

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Thu 7/4

2 stops33h 00m

London Heathrow

Thu 7/11

2 stops36h 03m

$905

Flights are sorted by cheapest first

Deals found on 5/31

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Heathrow. Price data was last updated on May 31, 2024.
The price you pay for your flight from Ontario to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 27 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

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

Use this chart to determine the cheapest time to fly round-trip from Ontario to Heathrow. Price data was last updated on May 26, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ontario to London Heathrow Airport flight should consider departing on Thursday mornings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Ontario to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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.

Temperature and rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature and rainfall totals by month.

LON

Temperature

39.2 - 62.6 °F

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated June 2, 2024.
See what other customers who have flown with United Airlines, American Airlines and KLM from Ontario to London have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,402 reviews
Check prices

Food

7.4

Entertainment

8.0

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

7.9

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
10,402 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Food

7.4

Entertainment

8.0

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

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

KLM
7.9
Good
1,507 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Food

7.4

Entertainment

8.0

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

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

JetBlue
7.6
Good
4,346 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Food

7.4

Entertainment

8.0

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

7.9

Reviews

1 / 10

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

Avianca
7.5
Good
3,630 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Food

7.4

Entertainment

8.0

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

7.9

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
10,755 reviews
Delta
8.0
Very good
10,402 reviews
Check prices

Food

7.4

Entertainment

8.0

Overall

8.0

Crew

8.6

Boarding

8.2

Comfort

7.9

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

Find useful and relevant information for your journey from Ontario to Heathrow. 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 Heathrow?

    If you book a flight to London Heathrow from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. There are 0 flights from Ontario to London Heathrow per day from 6 different airlines.

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

    Yes, there are multiple flights from Ontario to London Heathrow Airport for under $600. The cheapest flight booked recently is on Iberia for just $545, but on average you can expect to pay $589.

  • Are there last-minute flights available from Ontario to London Heathrow Airport for under $900?

    There are currently 20+ open flights from Ontario to London Heathrow Airport within the next 7 days for less than $900.

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

    According to our current data, Iberia ($545), American Airlines ($561), and British Airways ($562) offers the cheapest pricing from Ontario to London Heathrow Airport. Iberia is 24% cheaper than the average price of flights available within the next 90 days to this destination.

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

    To fly one-way, consider booking your trip with Iberia, which is currently one of the cheapest options available, starting at $401. American Airlines flights start at $408 while deals on United Airlines start at $413 one-way.

  • What does ONT to LHR mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Ontario Airport to London Heathrow Airport flight would often be abbreviated as a ONT to LHR flight.

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

    The amount of baggage you can bring on your Ontario to Heathrow 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 Heathrow with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to Heathrow 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 Heathrow that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Heathrow 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 Heathrow that allow pets onboard?

    Many airlines flying from Ontario to Heathrow 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 Heathrow?

    Yes, you can often find last-minute deals on Ontario to Heathrow 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 Heathrow Airport flight deals updated?

    The Ontario to London Heathrow Airport flight deals you see on this page were last updated on 6/2.

  • What are the most popular airlines that fly from Ontario to London Heathrow Airport?

    When booking a flight from Ontario to London Heathrow Airport, you may want to consider flying on American Airlines, British Airways or Delta as they are the most popular for this route.

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

    Currently, November is the cheapest month in which you can book a flight from Ontario to London Heathrow Airport (average of $652). Flying from Ontario to London Heathrow Airport in June is currently the most expensive (average of $1,114). 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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Top 6 airlines flying from Ontario to Heathrow

Discover the top 6 airlines that operate flights from Ontario to Heathrow. 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 2,807,690 searches. Data last updated June 2, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$482Average$691FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Virgin AtlanticCheapest$591Average$666FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest$597Average$879FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest$598Average$820FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$629Average$718FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest$642Average$805FlexibilityNo cancel feeOn-time77%
Search Iberia flights
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Search flights from Ontario to Heathrow by cabin class

Find flights from Ontario to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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How does Cheapflights help users find flights from Ontario to Heathrow?

Cheapflights makes it easy to find Ontario to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

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

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

Certainly. Search results for flights to Heathrow from Ontario shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes! Start tracking prices for Ontario to Heathrow 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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