What is the cheapest airline that flies from London to Ontario?

United Airlines, JetBlue, and British Airways are the most popular carriers operating from London to Ontario

When did momondo last update prices for flights from London to Ontario Airport?

Prices for flights from London to Ontario Airport were last updated today.

How old do you have to be to fly from London to Ontario Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

€432 Cheap Flights from London to Ontario in 2026

Q: What is the typical price of a round-trip flight between London and Ontario?

Prices are currently low for flights on this route. Typical prices usually range from €777 to €748. The lowest price recently found on this route was €542.

1 adult

0 bags

Voted the Winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from London to Los Angeles

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

11:40 - 22:41

LHR

ONT

19h 01m

1 stop

13:00 - 13:05

ONT

LHR

16h 05m

2 stops

€542Virgin Atlantic

Fri, 19 Jun - Sat, 4 Jul

11:40 - 22:41

LHR

ONT

19h 01m

1 stop

06:20 - 12:05

ONT

LHR

21h 45m

1 stop

€545Virgin Atlantic

Fri, 19 Jun - Sat, 4 Jul

11:45 - 22:40

LHR

ONT

18h 55m

2 stops

11:55 - 15:35

ONT

LHR

19h 40m

1 stop

€550Virgin Atlantic

Thu, 24 Sep - Thu, 8 Oct

11:45 - 23:34

LHR

ONT

19h 49m

2 stops

11:56 - 13:15

ONT

LHR

17h 19m

1 stop

€551Virgin Atlantic

Wed, 5 Aug - Thu, 13 Aug

06:30 - 16:24

LHR

ONT

17h 54m

2 stops

09:43 - 13:15

ONT

LHR

19h 32m

2 stops

€553Virgin Atlantic

Thu, 13 Aug - Wed, 19 Aug

11:00 - 18:15

LHR

ONT

15h 15m

1 stop

14:27 - 12:10

ONT

LHR

13h 43m

1 stop

€560British Airways

Mon, 17 Aug - Wed, 2 Sep

09:55 - 22:34

LHR

ONT

20h 39m

2 stops

09:50 - 13:15

ONT

LHR

19h 25m

2 stops

€561Delta

Wed, 27 May - Tue, 2 Jun

11:45 - 23:34

LHR

ONT

19h 49m

2 stops

11:55 - 15:35

ONT

LHR

19h 40m

1 stop

€566Virgin Atlantic

Wed, 5 Aug - Thu, 13 Aug

13:25 - 21:48

LHR

ONT

16h 23m

1 stop

17:50 - 15:35

ONT

LHR

13h 45m

1 stop

€568Delta

Fri, 29 May - Thu, 4 Jun

06:30 - 18:01

LHR

ONT

19h 31m

2 stops

17:05 - 20:10

ONT

LHR

19h 05m

2 stops

€569Delta

Tue, 22 Sep - Tue, 29 Sep

British Airways flights from London to Ontario

Our best British Airways deals on London to Ontario flight tickets

British Airways

17 Aug

LHR11:00London Heathrow

15h 15m

1 stop

ONT18:15Ontario

2 Sept

ONT14:27Ontario

13h 43m

1 stop

LHR12:10London Heathrow

€560

British Airways

18 May

LHR16:25London Heathrow

15h 21m

1 stop

ONT23:46Ontario

23 Jul

ONT14:15Ontario

14h 35m

1 stop

LHR12:50London Heathrow

€571

British Airways

28 Sept

LHR08:55London Heathrow

18h 02m

1 stop

ONT18:57Ontario

4 Oct

ONT23:59Ontario

25h 01m

1 stop

LHR09:00London Heathrow

€575

United Airlines flights from London to Ontario

Our best United Airlines deals on London to Ontario flight tickets

United Airlines

10 Sept

LHR13:00London Heathrow

15h 01m

1 stop

ONT20:01Ontario

24 Sept

ONT13:18Ontario

12h 22m

1 stop

LHR09:40London Heathrow

€587

United Airlines

1 Oct

LHR14:50London Heathrow

14h 02m

1 stop

ONT20:52Ontario

9 Oct

ONT13:18Ontario

15h 07m

1 stop

LHR12:25London Heathrow

€589

United Airlines

6 Sept

LHR13:40London Heathrow

16h 19m

1 stop

ONT21:59Ontario

14 Sept

ONT09:01Ontario

14h 24m

1 stop

LHR07:25London Heathrow

€590

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 19/6

11:40-22:41

1 stop19h 01m

Ontario

Sat 4/7

13:00-13:05

2 stops16h 05m

€542

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 19/6

11:40-22:41

1 stop19h 01m

Ontario

Sat 4/7

06:20-12:05

1 stop21h 45m

€545

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 24/9

11:45-22:40

2 stops18h 55m

Ontario

Thu 8/10

11:55-15:35

1 stop19h 40m

€550

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 5/8

11:45-23:34

2 stops19h 49m

Ontario

Thu 13/8

11:56-13:15

1 stop17h 19m

€551

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 13/8

06:30-16:24

2 stops17h 54m

Ontario

Wed 19/8

09:43-13:15

2 stops19h 32m

€553

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 17/8

11:00-18:15

1 stop15h 15m

Ontario

Wed 2/9

14:27-12:10

1 stop13h 43m

€560

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 27/5

09:55-22:34

2 stops20h 39m

Ontario

Tue 2/6

09:50-13:15

2 stops19h 25m

€561

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 5/8

11:45-23:34

2 stops19h 49m

Ontario

Thu 13/8

11:55-15:35

1 stop19h 40m

€566

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 29/5

13:25-21:48

1 stop16h 23m

Ontario

Thu 4/6

17:50-15:35

1 stop13h 45m

€568

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 22/9

06:30-18:01

2 stops19h 31m

Ontario

Tue 29/9

17:05-20:10

2 stops19h 05m

€569

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from London to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between London and Ontario?

What is the cheapest month to fly to Ontario?

If you don’t want to visit Ontario in December, then you should wait until March to fly from London, when ticket prices are also cheap, with an average price of €340.

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

You are more likely to see cheaper flights to Ontario from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around €583 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from London for as low as €424 on momondo.

When to book flights from London to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from London to Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap London to Ontario (LON to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Ontario

Fastest flight time	36h 49m
Direct flights	None

The fastest flight from London to Ontario takes 36h 49m

There are no direct flights from London to Ontario. There are no popular flight routes from London to Ontario.

Search flight deals

Frequently asked questions about flying from London to Ontario

How far is London to Ontario by plane?
A flight from London to Ontario will travel around 8718.6 km. Typically, this will take 36h 49m by plane in normal conditions.
When did momondo last update prices for flights from London to Ontario Airport?
Prices for flights from London to Ontario Airport were last updated today.
How old do you have to be to fly from London to Ontario Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from London to Ontario?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from London.

Can I find flights from London to Ontario with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to Ontario flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Ontario?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from London.

I’m not ready to book a flight from London to Ontario right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario from London and alert you when they change.