Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Ontario?

Flights via Seattle (SEA) offer the fastest connection on this route, with an average stopover time of 1h 25m.

What’s the fastest stopover option from London Heathrow Airport to Ontario?

Flights via Phoenix (PHX) have the shortest average one-way travel time for one-stop routes: 14h 21m.

What’s the cheapest stopover airport for flights from London Heathrow Airport to Ontario?

Lisbon (LIS) is the most affordable one-stop option, with an average return flight price of £395.

What’s the top stopover airport for flights from London Heathrow Airport to Ontario?

Seattle (SEA) – chosen by Cheapflights users on 26% of one-stop itineraries from London Heathrow Airport to Ontario on Cheapflights.

How long is the flight from London Heathrow Airport to Ontario?

Delta and Virgin Atlantic can get you from London Heathrow Airport to Ontario in just under 18h 03m. Your travel time can differ by up to 3h 31m. The distance between London Heathrow Airport and Ontario is about 5407 mi. This flight may include one or multiple stops.

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

Currently priced at £281, Finnair will fly you from London Heathrow Airport to Ontario and back. In addition to Finnair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Virgin Atlantic and British Airways - these airlines can fly you to your destination from £377 and £388, respectively. Users have found that Finnair is 48% cheaper than the other options available to this destination.

In terms of precipitation, rainfall in Ontario ranges from 3.0 - 86.0 inches per month. February is typically the wettest month, when rainfall can reach 86.0 mm. June is typically the driest time to visit Ontario when rainfall is around 3.0 mm.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 12.0 C).

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

Consider British Airways, Virgin Atlantic or Lufthansa when booking your flight. These represent the most popular airlines when flying from London Heathrow Airport to Ontario.

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

If you book a flight to Ontario from London Heathrow, you will be flying to 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 London Heathrow to Ontario per day from 6 different airlines.

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

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

How can I find direct flights from Heathrow to Ontario?

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

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

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

£308+ Flights from London Heathrow Airport to Ontario

Cheap flight deals from Heathrow to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Ontario
Explore the most affordable flight options available from Heathrow to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 December 2025.

Mon 8/1214:45LHR - ONT

1 stop16h 02mVirgin Atlantic

Mon 15/1213:29ONT - LHR

1 stop12h 31mVirgin Atlantic

Deal found 3/12£459

Mon 15/1214:45LHR - ONT

1 stop16h 02mVirgin Atlantic

Fri 16/113:11ONT - LHR

1 stop12h 49mVirgin Atlantic

Deal found 3/12£468

Thu 25/1210:45LHR - ONT

1 stop19h 48mVirgin Atlantic

Mon 2/206:00ONT - LHR

1 stop20h 00mVirgin Atlantic

Deal found 4/12£477

Sat 6/1215:05LHR - ONT

1 stop15h 42mVirgin Atlantic

Tue 9/1213:29ONT - LHR

1 stop12h 31mVirgin Atlantic

Deal found 3/12£480

Thu 11/1206:30LHR - ONT

2 stops21h 09mDelta

Wed 14/106:00ONT - LHR

2 stops16h 20mDelta

Deal found 4/12£495

Wed 24/1210:45LHR - ONT

1 stop19h 48mDelta

Sat 10/113:11ONT - LHR

1 stop12h 49mDelta

Deal found 3/12£501

Thu 11/1212:20LHR - ONT

1 stop18h 27mDelta

Tue 13/113:11ONT - LHR

1 stop12h 49mDelta

Deal found 4/12£508

Sun 7/1210:45LHR - ONT

1 stop16h 54mDelta

Sun 11/122:30ONT - LHR

1 stop25h 20mDelta

Deal found 4/12£510

Thu 4/1210:45LHR - ONT

1 stop21h 13mDelta

Sat 7/313:10ONT - LHR

1 stop12h 50mDelta

Deal found 4/12£510

Mon 8/1212:20LHR - ONT

1 stop18h 27mVirgin Atlantic

Mon 11/509:55ONT - LHR

1 stop15h 55mVirgin Atlantic

Deal found 3/12£514

Thu 4/1210:45LHR - ONT

1 stop21h 13mVirgin Atlantic

Tue 9/1213:29ONT - LHR

1 stop12h 31mVirgin Atlantic

Deal found 3/12£516

Thu 4/1210:45LHR - ONT

1 stop21h 13mVirgin Atlantic

Thu 11/1212:40ONT - LHR

1 stop13h 50mVirgin Atlantic

Deal found 3/12£517

Best flights from Heathrow to Ontario
Discover carefully curated flight deals from Heathrow to Ontario that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 December 2025.

Sat 28/306:30LHR - ONT

2 stops21h 34mDelta

Sat 11/422:30ONT - LHR

1 stop24h 15mDelta

Deal found 4/12£462

Sat 28/310:45LHR - ONT

1 stop18h 03mVirgin Atlantic

Sat 11/413:20ONT - LHR

2 stops16h 40mVirgin Atlantic

Deal found 4/12£474

Fri 3/411:20LHR - ONT

1 stop13h 53mDelta

Mon 13/413:00ONT - LHR

1 stop12h 50mDelta

Deal found 3/12£477

Sat 17/106:30LHR - ONT

2 stops24h 21mVirgin Atlantic

Sat 24/113:10ONT - LHR

1 stop12h 50mVirgin Atlantic

Deal found 3/12£484

Sun 5/410:55LHR - ONT

1 stop18h 09mDelta

Wed 15/411:55ONT - LHR

1 stop13h 05mDelta

Deal found 3/12£477

Sun 18/106:30LHR - ONT

2 stops22h 35mDelta

Sun 25/122:30ONT - LHR

2 stops26h 15mDelta

Deal found 3/12£484

Thu 2/413:05LHR - ONT

1 stop15h 59mDelta

Tue 14/407:00ONT - LHR

1 stop15h 30mDelta

Deal found 3/12£492

Wed 1/410:55LHR - ONT

1 stop18h 09mDelta

Mon 13/422:59ONT - LHR

1 stop23h 31mDelta

Deal found 3/12£492

Mon 6/410:55LHR - ONT

1 stop18h 09mDelta

Thu 16/412:00ONT - LHR

1 stop17h 30mDelta

Deal found 3/12£492

Fri 3/413:05LHR - ONT

1 stop15h 59mDelta

Fri 17/422:59ONT - LHR

1 stop30h 31mDelta

Deal found 3/12£492

Thu 2/411:20LHR - ONT

1 stop13h 53mDelta

Sun 12/411:59ONT - LHR

1 stop13h 01mDelta

Deal found 3/12£492

Mon 6/417:25LHR - ONT

1 stop25h 54mDelta

Fri 17/417:55ONT - LHR

1 stop31h 05mDelta

Deal found 3/12£492

Last-minute flights from Heathrow to Ontario
Discover last-minute flight deals from Heathrow to Ontario. Data last updated 5 December 2025 and is based on user searches.

Sat 6/1215:05LHR - ONT

1 stop15h 42mVirgin Atlantic

Tue 9/1213:29ONT - LHR

1 stop12h 31mVirgin Atlantic

Deal found 3/12£480

Mon 8/1214:45LHR - ONT

1 stop16h 02mVirgin Atlantic

Mon 15/1213:29ONT - LHR

1 stop12h 31mVirgin Atlantic

Deal found 3/12£459

Mon 15/1214:45LHR - ONT

1 stop16h 02mVirgin Atlantic

Fri 16/113:11ONT - LHR

1 stop12h 49mVirgin Atlantic

Deal found 3/12£468

Thu 25/1210:45LHR - ONT

1 stop19h 48mVirgin Atlantic

Mon 2/206:00ONT - LHR

1 stop20h 00mVirgin Atlantic

Deal found 4/12£477

Sat 10/110:45LHR - ONT

1 stop19h 03mVirgin Atlantic

Sun 18/112:41ONT - LHR

1 stop35h 09mVirgin Atlantic

Deal found 3/12£477

Thu 15/110:45LHR - ONT

1 stop13h 27mVirgin Atlantic

Fri 23/112:41ONT - LHR

1 stop33h 44mVirgin Atlantic

Deal found 4/12£465

Thu 15/110:45LHR - ONT

1 stop19h 53mVirgin Atlantic

Sat 24/112:41ONT - LHR

1 stop14h 59mVirgin Atlantic

Deal found 4/12£486

Sat 17/115:05LHR - ONT

1 stop15h 46mVirgin Atlantic

Sat 24/106:00ONT - LHR

1 stop20h 00mVirgin Atlantic

Deal found 3/12£475

Tue 20/110:45LHR - ONT

1 stop13h 30mVirgin Atlantic

Sat 28/213:10ONT - LHR

1 stop12h 50mVirgin Atlantic

Deal found 3/12£467

Tue 27/115:00LHR - ONT

1 stop15h 48mBritish Airways

Tue 3/216:45ONT - LHR

1 stop12h 30mBritish Airways

Deal found 4/12£478

Sat 31/108:20LHR - ONT

1 stop18h 25mBritish Airways

Fri 6/215:09ONT - LHR

1 stop13h 06mBritish Airways

Deal found 2/12£444

One-way flights from Heathrow to Ontario
Search for one-way flight options from Heathrow to Ontario. Find affordable one-way fares based on user searches. Data last updated 5 December 2025.

Mon 26/118:45LHR - ONT

2 stops27h 33mBritish Airways

Deal found 4/12£308

Tue 17/208:20LHR - ONT

1 stop16h 04mBritish Airways

Deal found 2/12£310

Wed 14/106:30LHR - ONT

2 stops23h 28mUnited Airlines

Deal found 3/12£319

Tue 20/108:30LHR - ONT

2 stops22h 23mUnited Airlines

Deal found 4/12£320

Mon 26/115:00LHR - ONT

1 stop27h 08mMultiple Airlines

Deal found 2/12£322

Mon 13/416:25LHR - ONT

1 stop15h 15mBritish Airways

Deal found 3/12£322

Tue 17/209:55LHR - ONT

1 stop18h 02mMultiple Airlines

Deal found 3/12£323

Tue 27/115:00LHR - ONT

1 stop15h 48mBritish Airways

Deal found 4/12£328

Tue 13/115:00LHR - ONT

2 stops29h 47mAir Canada

Deal found 3/12£329

Find flight deals from Heathrow to Ontario

Round-trip from	£435
One-way from	£308
Popular in	December
Cheapest in	September
Average price	£767

Virgin Atlantic
10/2-3/3
2 total stops
26h 20m total
London to Ontario

Search Deals

British Airways
26/1
2 total stops
27h 33m total
London to Ontario

Search Deals

Highest demand for flights based on searches. 8% potential increase in price (£38 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£16 potential savings vs. average return price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 28/3

06:30-21:04

2 stops21h 34m

Ontario

Sat 11/4

22:30-06:45

1 stop24h 15m

£462

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 28/3

10:45-21:48

1 stop18h 03m

Ontario

Sat 11/4

13:20-14:00

2 stops16h 40m

£474

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 3/4

11:20-17:13

1 stop13h 53m

Ontario

Mon 13/4

13:00-09:50

1 stop12h 50m

£477

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 5/4

10:55-21:04

1 stop18h 09m

Ontario

Wed 15/4

11:55-09:00

1 stop13h 05m

£477

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 17/1

06:30-22:51

2 stops24h 21m

Ontario

Sat 24/1

13:10-10:00

1 stop12h 50m

£484

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 18/1

06:30-21:05

2 stops22h 35m

Ontario

Sun 25/1

22:30-08:45

2 stops26h 15m

£484

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 2/4

13:05-21:04

1 stop15h 59m

Ontario

Tue 14/4

07:00-06:30

1 stop15h 30m

£492

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/4

10:55-21:04

1 stop18h 09m

Ontario

Mon 13/4

22:59-06:30

1 stop23h 31m

£492

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 6/4

10:55-21:04

1 stop18h 09m

Ontario

Thu 16/4

12:00-13:30

1 stop17h 30m

£492

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 3/4

13:05-21:04

1 stop15h 59m

Ontario

Fri 17/4

22:59-13:30

1 stop30h 31m

£492

Flights are sorted by cheapest return flights first.

Deals found on 4/12

Showing 1-10 of 24 results

Best time to book a flight from Heathrow to Ontario

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

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Ontario

Prices

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

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Ontario, you should look to book at least 75 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 London Heathrow Airport to Ontario?

Currently, December is the cheapest month in which you can book a flight from London Heathrow Airport to Ontario (average of £341). Flying from London Heathrow Airport to Ontario in July is currently the most expensive (average of £405). 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 LHR to ONT?

It’s optimal to fly from London Heathrow Airport to Ontario in the evening. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight at midday.

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown with KLM, Finnair, andVirgin Atlantic from London Heathrow Airport to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

KLM

7.7

Good

1,430 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

KLM

7.7

Good

1,430 reviews

KLM

7.7

Good

1,430 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

Finnair

7.6

Good

1,334 reviews

KLM

7.7

Good

1,430 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

Virgin Atlantic

7.5

Good

675 reviews

KLM

7.7

Good

1,430 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

Lufthansa

6.8

Okay

7,612 reviews

KLM

7.7

Good

1,430 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

British Airways

6.7

Okay

7,562 reviews

KLM

7.7

Good

1,430 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

Related info for your journey

What airport do you fly into for flights to Ontario from London Heathrow?
If you book a flight to Ontario from London Heathrow, you will be flying to 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 London Heathrow to Ontario per day from 6 different airlines.
How long is the flight from London Heathrow Airport to Ontario?
Delta and Virgin Atlantic can get you from London Heathrow Airport to Ontario in just under 18h 03m. Your travel time can differ by up to 3h 31m. The distance between London Heathrow Airport and Ontario is about 5407 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from London Heathrow Airport to Ontario round-trip?
Currently priced at £281, Finnair will fly you from London Heathrow Airport to Ontario and back. In addition to Finnair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Virgin Atlantic and British Airways - these airlines can fly you to your destination from £377 and £388, respectively. Users have found that Finnair is 48% cheaper than the other options available to this destination.
Can I find deals for flights from Heathrow to Ontario that include hotel bookings?
Yes. In addition to deals on Heathrow to Ontario flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Ontario?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Ontario.
Can I find deals for business class flights from Heathrow to Ontario?
Yes. Cheapflights offers flight deals from Heathrow to Ontario 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 London Heathrow Airport to Ontario?
Currently, December is the cheapest month in which you can book a flight from London Heathrow Airport to Ontario (average of £341). Flying from London Heathrow Airport to Ontario in July is currently the most expensive (average of £405). 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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Top 6 airlines flying from Heathrow to Ontario

Airline	Cheapest	Average	Flexibility	On-time
Finnair	Cheapest£281	Average£498	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Virgin Atlantic	Cheapest£377	Average£500	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£388	Average£476	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£388	Average£563	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
KLM	Cheapest£397	Average£602	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Lufthansa	Cheapest£434	Average£583	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights

Fly with Cheapflights

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

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

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

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

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

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

Yes, Cheapflights offers price alerts on Heathrow to Ontario flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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Cheap flights from London Heathrow Airport to Ontario from £308

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 26/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Ontario

Cheapest flights from Heathrow to OntarioExplore the most affordable flight options available from Heathrow to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 December 2025.

Explore the most affordable flight options available from Heathrow to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 December 2025.

Find flight deals from Heathrow to Ontario

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from London Heathrow Airport to Ontario that are best for you.

Best time to book a flight from Heathrow to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Heathrow with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Ontario

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

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

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

What’s the top stopover airport for flights from London Heathrow Airport to Ontario?

What’s the cheapest stopover airport for flights from London Heathrow Airport to Ontario?

What’s the fastest stopover option from London Heathrow Airport to Ontario?

Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Ontario?

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown with KLM, Finnair, andVirgin Atlantic from London Heathrow Airport to Ontario. Users can see the overall rating for each airline as well as how each is rated 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 Heathrow to Ontario. 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 into for flights to Ontario from London Heathrow?

How long is the flight from London Heathrow Airport to Ontario?

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

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

How can I find direct flights from Heathrow to Ontario?

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

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

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 Heathrow to Ontario

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

Top 6 airlines flying from Heathrow to Ontario

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 Heathrow to Ontario?

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

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

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

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Cheapest flights from Heathrow to Ontario
Explore the most affordable flight options available from Heathrow to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 December 2025.