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 £386.

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

Seattle (SEA) – chosen by Cheapflights users on 24% of one-stop itineraries from London Heathrow Airport to Ontario on Cheapflights.

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 15m.

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 19m.

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

British Airways can get you from London Heathrow Airport to Ontario in just under 17h 26m. Your travel time can differ by up to . The distance between London Heathrow Airport and Ontario is about 5407 mi.

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

Currently priced at £275, 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 British Airways and United Airlines - these airlines can fly you to your destination from £380 and £380, respectively. Users have found that Finnair is 47% cheaper than the other options available to this destination.

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

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

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 Finnair, British Airways or KLM 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.

£246+ Flights from London Heathrow Airport to Ontario

Q: How much does it cost for a return flight from London Heathrow Airport to Ontario?

Airfare is below average for this route at the moment. London Heathrow Airport to Ontario flights typically cost between £405 and £507 in October. The cheapest return flight price found within the last 3 days was £375 on Virgin Atlantic (30 Oct-6 Nov).

Cheap flight deals from Heathrow to Ontario

Round-trip from	£375
One-way from	£246
Popular in	December
Cheapest in	September
Average price	£420

Virgin Atlantic
30/10-6/11
2 total stops
36h 11m total
London to Ontario

Search Deals

Iberia
31/10
1 total stop
24h 23m total
London to Ontario

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (£19 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£12 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from Heathrow to Ontario

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 17 September 2025.

Thu 30/1014:45LHR - ONT

1 stop14h 56mVirgin Atlantic

Thu 6/1107:35ONT - LHR

1 stop21h 15mVirgin Atlantic

Deal found 15/9£375

Sat 1/1112:20LHR - ONT

1 stop17h 21mVirgin Atlantic

Sat 8/1107:05ONT - LHR

1 stop15h 20mVirgin Atlantic

Deal found 17/9£377

Sat 15/1106:20LHR - ONT

2 stops23h 15mVirgin Atlantic

Sat 13/1213:20ONT - LHR

1 stop12h 40mVirgin Atlantic

Deal found 15/9£379

Sat 22/1116:25LHR - ONT

2 stops39h 27mVirgin Atlantic

Sat 29/1111:45ONT - LHR

1 stop36h 05mVirgin Atlantic

Deal found 14/9£381

Fri 26/913:25LHR - ONT

1 stop17h 15mVirgin Atlantic

Mon 6/1013:15ONT - LHR

1 stop12h 35mVirgin Atlantic

Deal found 16/9£389

Thu 30/1010:05LHR - ONT

1 stop19h 13mBritish Airways

Thu 6/1114:59ONT - LHR

1 stop12h 41mBritish Airways

Deal found 15/9£390

Wed 1/1010:30LHR - ONT

1 stop20h 03mBritish Airways

Wed 19/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 15/9£391

Mon 22/915:10LHR - ONT

1 stop15h 23mBritish Airways

Wed 8/1014:51ONT - LHR

1 stop15h 34mBritish Airways

Deal found 15/9£392

Mon 22/917:25LHR - ONT

2 stops38h 17mVirgin Atlantic

Tue 7/1013:15ONT - LHR

2 stops15h 55mVirgin Atlantic

Deal found 15/9£393

Thu 30/1006:30LHR - ONT

2 stops19h 49mDelta

Thu 6/1106:00ONT - LHR

2 stops18h 45mDelta

Deal found 15/9£394

Wed 1/1011:00LHR - ONT

1 stop18h 24mBritish Airways

Sat 22/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 15/9£398

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 17 September 2025.

Fri 21/1111:45LHR - ONT

1 stop17h 26mBritish Airways

Sun 30/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 14/9£390

Sat 1/1110:05LHR - ONT

1 stop15h 47mMultiple Airlines

Fri 7/1115:08ONT - LHR

1 stop13h 07mMultiple Airlines

Deal found 14/9£390

Thu 30/1006:30LHR - ONT

2 stops19h 49mDelta

Thu 6/1106:00ONT - LHR

2 stops18h 45mDelta

Deal found 15/9£394

Fri 26/911:15LHR - ONT

1 stop15h 01mBritish Airways

Wed 8/1014:51ONT - LHR

1 stop15h 34mBritish Airways

Deal found 14/9£391

Wed 1/1010:30LHR - ONT

1 stop20h 03mBritish Airways

Wed 19/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 15/9£391

Sun 16/1116:30LHR - ONT

1 stop15h 27mBritish Airways

Tue 25/1112:49ONT - LHR

1 stop14h 51mBritish Airways

Deal found 14/9£391

Sat 15/1111:45LHR - ONT

1 stop17h 26mBritish Airways

Tue 25/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 14/9£391

Wed 1/1012:00LHR - ONT

1 stop14h 54mBritish Airways

Mon 24/1115:19ONT - LHR

1 stop12h 56mBritish Airways

Deal found 15/9£391

Wed 1/1011:00LHR - ONT

1 stop18h 24mBritish Airways

Sun 23/1112:49ONT - LHR

1 stop13h 11mBritish Airways

Deal found 15/9£391

Wed 1/1012:00LHR - ONT

1 stop14h 54mBritish Airways

Tue 25/1114:59ONT - LHR

1 stop12h 41mBritish Airways

Deal found 15/9£391

Wed 1/1011:00LHR - ONT

1 stop18h 24mBritish Airways

Sat 22/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 15/9£398

Last-minute flights from Heathrow to Ontario
Discover last-minute flight deals from Heathrow to Ontario. Data last updated 17 September 2025 and is based on user searches.

Mon 22/915:10LHR - ONT

1 stop15h 23mBritish Airways

Wed 8/1014:51ONT - LHR

1 stop15h 34mBritish Airways

Deal found 15/9£392

Mon 22/917:25LHR - ONT

2 stops38h 17mVirgin Atlantic

Tue 7/1013:15ONT - LHR

2 stops15h 55mVirgin Atlantic

Deal found 15/9£393

Wed 24/909:55LHR - ONT

2 stops21h 47mVirgin Atlantic

Wed 1/1006:00ONT - LHR

1 stop24h 15mVirgin Atlantic

Deal found 16/9£399

Fri 26/913:25LHR - ONT

1 stop17h 15mVirgin Atlantic

Mon 6/1013:15ONT - LHR

1 stop12h 35mVirgin Atlantic

Deal found 16/9£389

Wed 1/1010:30LHR - ONT

1 stop20h 03mBritish Airways

Wed 19/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 15/9£391

Wed 1/1011:00LHR - ONT

1 stop18h 24mBritish Airways

Sat 22/1116:47ONT - LHR

1 stop12h 28mBritish Airways

Deal found 15/9£398

Wed 29/1020:25LHR - ONT

2 stops33h 16mVirgin Atlantic

Wed 5/1106:00ONT - LHR

2 stops17h 05mVirgin Atlantic

Deal found 14/9£361

Thu 30/1014:45LHR - ONT

1 stop14h 56mVirgin Atlantic

Thu 6/1107:35ONT - LHR

1 stop21h 15mVirgin Atlantic

Deal found 15/9£375

Thu 30/1010:05LHR - ONT

1 stop19h 13mBritish Airways

Thu 6/1114:59ONT - LHR

1 stop12h 41mBritish Airways

Deal found 15/9£390

Thu 30/1006:30LHR - ONT

2 stops19h 49mDelta

Thu 6/1106:00ONT - LHR

2 stops18h 45mDelta

Deal found 15/9£394

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 17 September 2025.

Fri 31/1016:30LHR - ONT

1 stop24h 23mIberia

Deal found 15/9£246

Fri 31/1019:10LHR - ONT

2 stops25h 33mMultiple Airlines

Deal found 15/9£259

Mon 10/1108:25LHR - ONT

2 stops22h 04mAmerican Airlines

Deal found 13/9£310

Tue 20/106:05LHR - ONT

2 stops23h 57mBritish Airways

Deal found 14/9£312

Mon 23/215:00LHR - ONT

1 stop14h 57mBritish Airways

Deal found 16/9£313

Wed 18/206:20LHR - ONT

2 stops17h 59mVirgin Atlantic

Deal found 14/9£315

Mon 10/1114:45LHR - ONT

1 stop16h 10mVirgin Atlantic

Deal found 14/9£318

Wed 3/1211:00LHR - ONT

2 stops19h 28mMultiple Airlines

Deal found 15/9£319

Mon 9/215:00LHR - ONT

1 stop15h 02mBritish Airways

Deal found 16/9£320

Wed 10/1209:55LHR - ONT

1 stop17h 44mBritish Airways

Deal found 15/9£321

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

Fri 21/11

11:45-21:11

1 stop17h 26m

Ontario

Sun 30/11

16:47-13:15

1 stop12h 28m

£390

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 1/11

10:05-18:52

1 stop15h 47m

Ontario

Fri 7/11

15:08-12:15

1 stop13h 07m

£390

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 26/9

11:15-18:16

1 stop15h 01m

Ontario

Wed 8/10

14:51-14:25

1 stop15h 34m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/10

10:30-22:33

1 stop20h 03m

Ontario

Wed 19/11

16:47-13:15

1 stop12h 28m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 16/11

16:30-23:57

1 stop15h 27m

Ontario

Tue 25/11

12:49-11:40

1 stop14h 51m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 15/11

11:45-21:11

1 stop17h 26m

Ontario

Tue 25/11

16:47-13:15

1 stop12h 28m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/10

12:00-18:54

1 stop14h 54m

Ontario

Mon 24/11

15:19-12:15

1 stop12h 56m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/10

11:00-21:24

1 stop18h 24m

Ontario

Sun 23/11

12:49-10:00

1 stop13h 11m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/10

12:00-18:54

1 stop14h 54m

Ontario

Tue 25/11

14:59-11:40

1 stop12h 41m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 30/10

06:30-19:19

2 stops19h 49m

Ontario

Thu 6/11

06:00-08:45

2 stops18h 45m

£394

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 19 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 80 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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Ontario (average of £516). Flying from London Heathrow Airport to Ontario in August is currently the most expensive (average of £827). 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 afternoon. By choosing this option you can save up to 24% on the cost of your flight, compared to a flight at midday.

How much does it cost for a return flight from London Heathrow Airport to Ontario?

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown with Finnair, United Airlines, 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.

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

Finnair

7.6

Good

1,324 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

United Airlines

7.4

Good

8,924 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Virgin Atlantic

7.4

Good

664 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

Lufthansa

6.8

Okay

7,407 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

British Airways

6.7

Okay

7,363 reviews

Finnair

7.6

Good

1,324 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Anonymous,May 2025

FRA - DFW

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?
British Airways can get you from London Heathrow Airport to Ontario in just under 17h 26m. Your travel time can differ by up to . The distance between London Heathrow Airport and Ontario is about 5407 mi.
What are the cheapest airlines flying from London Heathrow Airport to Ontario round-trip?
Currently priced at £275, 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 British Airways and United Airlines - these airlines can fly you to your destination from £380 and £380, respectively. Users have found that Finnair is 47% 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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Ontario (average of £516). Flying from London Heathrow Airport to Ontario in August is currently the most expensive (average of £827). 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£275	Average£431	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
British Airways	Cheapest£380	Average£459	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£380	Average£636	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
KLM	Cheapest£388	Average£589	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Virgin Atlantic	Cheapest£402	Average£501	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Lufthansa	Cheapest£424	Average£568	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 £246

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 31/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Ontario

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 17 September 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 17 September 2025.

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?

How much does it cost for a return flight from London Heathrow Airport to Ontario?

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

What’s the fastest stopover option 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

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 17 September 2025.