Question 1

What is the cheapest flight from London to Ontario?

Accepted Answer

In the last 7 days, the lowest price for a flight from London to Ontario was $473 for a one-way ticket and $660 for a round-trip. <a href='/flight-routes/London-LON/Ontario-ONT'>Visit our flight page for the latest deals!>/a>

Question 2

Do I need a passport to fly between London and Ontario?

Accepted Answer

A passport is required to fly from London to Ontario. <a href='/flight-routes/London-LON/Ontario-ONT'>Visit our flight page for the latest deals!>/a>

Question 3

Which airports will I be using when flying from London to Ontario?

Accepted Answer

London is served by 2 major airports and there is only 1 main airport in Ontario. You will leave London from one of these airports: London Gatwick or London Heathrow. You will be arriving at Ontario. <a href='/flight-routes/London-LON/Ontario-ONT'>Visit our flight page for the latest deals!>/a>

Question 4

Which airlines fly non-stop between London and Ontario?

Accepted Answer

There is just one airline that flies from London to Ontario direct and that is British Airways. The best round-trip deal found from British Airways for the route is $567.

Question 5

Which airlines fly non-stop between London and Ontario?

Accepted Answer

There is just one airline that flies from London to Ontario direct and that is British Airways. The best round-trip deal found from British Airways for the route is $567.

Question 6

Which aircraft models fly most regularly from London to Ontario?

Accepted Answer

We unfortunately don’t have that data for this specific route.

Question 7

Which airline alliances offer flights from London to Ontario?

Accepted Answer

oneworld is the only airline alliance operating flights between London and Ontario.

Question 8

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

Accepted Answer

The cheapest month for flights from London to Ontario is March, where tickets cost $398 (return) on average. On the other hand, the most expensive months are May and July, where the average cost of round-trip tickets is $566 and $521 respectively.

Question 9

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

Accepted Answer

The cheapest month for flights from London to Ontario is March, where tickets cost $398 (return) on average. On the other hand, the most expensive months are May and July, where the average cost of round-trip tickets is $566 and $521 respectively.

Question 10

How does KAYAK find such low prices on flights from London to Ontario?

Accepted Answer

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Ontario. <a href='/flight-routes/London-LON/Ontario-ONT'>Visit our flight page for the latest deals!>/a>

Question 11

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Ontario?

Accepted Answer

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from London is likely to change within 7 days, so travelers know whether to wait or book now. <a href='/flight-routes/London-LON/Ontario-ONT'>Visit our flight page for the latest deals!>/a>

Question 12

What is the Hacker Fare option on flights from London to Ontario?

Accepted Answer

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to London with another airline. <a href='/flight-routes/London-LON/Ontario-ONT'>Visit our flight page for the latest deals!>/a>

Question 13

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Ontario?

Accepted Answer

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. <a href='/flight-routes/London-LON/Ontario-ONT'>Visit our flight page for the latest deals!>/a>

Question 14

What is the cheapest layover airport when flying from London to Ontario?

Accepted Answer

Flights via Dallas (DFW) offer the most affordable fares, with an average round-trip price of $578.

Question 15

What is the most popular layover airport when flying from London to Ontario?

Accepted Answer

Dallas (DFW) is the top choice – 75% of KAYAK users who clicked on 1-stop flights from London to Ontario picked an itinerary connecting there.

Question 16

Which layover airport has the quickest connection when flying from London to Ontario?

Accepted Answer

If you prefer a quick connection, Salt Lake City (SLC) often has the shortest layovers from London to Ontario, with an average of 1h 31m.

Question 17

Which layover airport offers the shortest total travel time from London to Ontario?

Accepted Answer

Consider flying via Phoenix (PHX) for the shortest journey. The average one-way travel time for flights connecting there is 13h 41m.

Question 18

Which airlines provide the cheapest flights from London to Ontario?

Accepted Answer

In the past 7 days, the cheapest round-trip tickets from London to Ontario were found on United Airlines ($660) and American Airlines ($665).

Question 19

Which airlines provide the cheapest flights from London to Ontario?

Accepted Answer

In the past 7 days, the cheapest round-trip tickets from London to Ontario were found on United Airlines ($660) and American Airlines ($665).

Question 20

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

Accepted Answer

To get a below average price on the flight from London to Ontario, you should book around 2 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Question 21

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

Accepted Answer

To get a below average price on the flight from London to Ontario, you should book around 2 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Question 22

How much is a round-trip flight from London to Ontario?

Accepted Answer

Flight prices are below average for this route right now.Flights to Ontario from London usually cost between $848 and $722 in October.
The lowest price found in the past 7 days was $660 on United Airlines (Oct 7-Nov 20).

Question 23

What are the most popular airlines flying to Ontario?

Accepted Answer

The most popular airline among KAYAK users flying to Ontario is British Airways, followed by American Airlines and Virgin Atlantic.

Low season	January
High season	December
Cheapest flight	$473

LON - ONT

$473 Find Cheap Flights from London to Ontario

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

Everything you should know

Cheap Flights from London to Ontario (LON-ONT)

Recent round-trip flight deals from London to Ontario

Recent one-way flight deals from London to Ontario

Recent last minute flight deals from London to Ontario

KAYAK's insights & trends for London to Ontario flights

Get data-powered insights and trends into flights from London to Ontario to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from London to Ontario?

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

The cheapest month for flights from London to Ontario is March, where tickets cost $398 (return) on average. On the other hand, the most expensive months are May and July, where the average cost of round-trip tickets is $566 and $521 respectively.

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

To get a below average price on the flight from London to Ontario, you should book around 2 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Which airlines provide the cheapest flights from London to Ontario?

In the past 7 days, the cheapest round-trip tickets from London to Ontario were found on United Airlines ($660) and American Airlines ($665).

Which airlines fly non-stop between London and Ontario?

There is just one airline that flies from London to Ontario direct and that is British Airways. The best round-trip deal found from British Airways for the route is $567.

What is the most popular layover airport when flying from London to Ontario?

Dallas (DFW) is the top choice – 75% of KAYAK users who clicked on 1-stop flights from London to Ontario picked an itinerary connecting there.

What is the cheapest layover airport when flying from London to Ontario?

Flights via Dallas (DFW) offer the most affordable fares, with an average round-trip price of $578.

Which layover airport offers the shortest total travel time from London to Ontario?

Consider flying via Phoenix (PHX) for the shortest journey. The average one-way travel time for flights connecting there is 13h 41m.

Which layover airport has the quickest connection when flying from London to Ontario?

If you prefer a quick connection, Salt Lake City (SLC) often has the shortest layovers from London to Ontario, with an average of 1h 31m.

Good to know

When to book flights from London to Ontario

FAQs for booking flights from London to Ontario

What is the cheapest flight from London to Ontario?

In the last 7 days, the lowest price for a flight from London to Ontario was $473 for a one-way ticket and $660 for a round-trip.

Do I need a passport to fly between London and Ontario?

A passport is required to fly from London to Ontario.

Which airports will I be using when flying from London to Ontario?

London is served by 2 major airports and there is only 1 main airport in Ontario. You will leave London from one of these airports: London Gatwick or London Heathrow. You will be arriving at Ontario.

Which aircraft models fly most regularly from London to Ontario?

We unfortunately don’t have that data for this specific route.

Which airline alliances offer flights from London to Ontario?

oneworld is the only airline alliance operating flights between London and Ontario.

How does KAYAK find such low prices on flights from London to Ontario?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London to Ontario.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London to Ontario?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from London is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from London to Ontario?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to London with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London to Ontario?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Everything you need to know for your flight from London to Ontario

Information on your arrival and departure airports

Cabin class types available on flights from London to Ontario

Complete your trip to Ontario with a hotel stay or car rental

Find direct flights to and from London and Ontario

Flights to other popular destinations

Flights from domestic origins to Ontario

Choose which airport to fly into in Ontario

Find deals for your return flight