Question 1

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

Accepted Answer

Flying on United Airlines is currently your cheapest option to London, with prices starting at $652. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at $662 and $667, respectively. You may be able to fly from Ontario to London for 13% less than the average price by searching for these airlines.

Question 2

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

Accepted Answer

The cheapest airlines for a one-way flight from Ontario to London are United Airlines ($477), British Airways ($492), and Iberia ($495).

Question 3

E

Accepted Answer

Currently, November is the cheapest month in which you can book a flight from Ontario to London (average of $653). Flying from Ontario to London in June is currently the most expensive (average of $1,158). 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.

January

$673

February

$663

March

$715

April

$692

May

$735

June

$1,158

July

$980

August

$776

September

$743

October

$710

November

$653

December

$671

Question 4

When is the best time to book a flight from Ontario to London?

Accepted Answer

To ensure you get the cheapest price possible for a flight from Ontario to London, you should look to book at least 72 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.

Question 5

When is the cheapest time to fly from Ontario to London?

Accepted Answer

Travelers seeking maximum savings on their Ontario to London flight should consider departing on Tuesday at noon when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

How recently were the Ontario to London flight deals updated?

Accepted Answer

The Ontario to London flight deals you see on this page were last updated on 5/6.

Question 7

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

Accepted Answer

Before booking your flight from Ontario to London check out the most popular airlines for this route: American Airlines, British Airways or Delta.

Question 8

What are the most popular routes from Ontario to London?

Accepted Answer

The most popular flight routes from Ontario to London are Ontario - London Heathrow, Ontario - London Gatwick and Ontario - London City.

Question 9

Can I find flights from Ontario to London for under $700 on Cheapflights?

Accepted Answer

Yes, there are multiple flights from Ontario to London for under $700. The cheapest flight booked recently is on Multiple Airlines for just $646, but on average you can expect to pay $693.

Question 10

Are there last-minute flights available from Ontario to London for under $800?

Accepted Answer

There are currently 20+ open flights from Ontario to London within the next 7 days for less than $800.

Question 11

What is the cheapest day to fly round-trip from Ontario to London?

Accepted Answer

Friday flights are found to be more expensive to fly from Ontario to London. 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.

Question 12

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

Accepted Answer

To save on the cost of your flight from Ontario to London, book at least 15 days before your planned departure. Booking around this time can save you about 40% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $755 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $1,026.

Question 13

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

Accepted Answer

Our data shows that October tends to be the cheapest month to fly to London from Ontario. Users have commonly found prices around $715 for the month, but tickets can be as low as $429. Due to multiple factors, prepare for potentially higher prices in June.

Question 14

When is the cheapest time to fly from Ontario to London (ONT - LON)?

Accepted Answer

It’s optimal to fly from Ontario to London at noon. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the morning.

Question 15

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

Accepted Answer

Most people fly from Ontario (ONT) if they book a flight from Ontario to London. On average, Ontario has 0 outbound flights to London per day from 6 airlines. Ontario is conveniently located just 3.1 mi from Ontario’s city center.

Question 16

What does ONT to LHR mean?

Accepted Answer

ONT stands for Ontario Airport, while LHR stands for London Heathrow Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. London Gatwick Airport (LGW), London Stansted Airport (STN), London Luton Airport (LTN), London City Airport (LCY), London Southend Airport (SEN) are some additional IATA codes for airports related to your trip.

Question 17

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

Accepted Answer

The amount of baggage you can bring on your Ontario to London 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.

Question 18

Can I find deals on flights from Ontario to London with specific airlines?

Accepted Answer

Yes, Cheapflights allows you to browse and filter Ontario to London flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

Question 19

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

Accepted Answer

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

Question 20

How can I find direct flights from Ontario to London?

Accepted Answer

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

Question 21

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

Accepted Answer

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

Question 22

Can I find deals for flights from Ontario to London that allow pets onboard?

Accepted Answer

Many airlines flying from Ontario to London 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.

Question 23

Can I find deals on last-minute flights from Ontario to London?

Accepted Answer

Yes, you can often find last-minute deals on Ontario to London 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.

Question 24

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

Accepted Answer

Deals for Ontario to London flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Question 25

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

Accepted Answer

Cheapflights simply makes it quick and affordable to book flights from Ontario to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Question 26

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

Accepted Answer

Yes, we can. To see specific flights from Ontario to London with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Question 27

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

Accepted Answer

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

Popular in	June
Cheapest in	April
Round-trip from	$643
One-way from	$527

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$482	Average$691	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Virgin Atlantic	Cheapest$590	Average$666	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest$597	Average$931	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
American Airlines	Cheapest$597	Average$782	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights
United Airlines	Cheapest$615	Average$671	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Iberia	Cheapest$642	Average$805	FlexibilityNo cancel fee	On-time77%	Search Iberia flights

Cheap flights from Ontario (ONT) to London (LON) from $397

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 6/30. 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.

The best prices from Ontario to London are usually found in April or January, booked 72 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Ontario to London

Popular in

Cheapest in

Round-trip from

One-way from

What is the cheapest day to fly round-trip from Ontario to London?

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

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

When is the cheapest time to fly from Ontario to London (ONT - LON)?

Cheap United Airlines flights from Ontario to London

Check out some of the cheapest United Airlines flights we've come across from Ontario to London. Make sure to check back often as deals are often changing.

Cheap Delta flights from Ontario to London

Some of the best deals we've found on Delta flights traveling from Ontario to London. Ensure the flight price, dates, time, and airline match your criteria before you book.

Cheap Ontario to London flights in May & June 2024

Find cheap flight options from Ontario to London specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,689,106 searches. Prices were last updated on May 6, 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.

Ontario to London 2024 flight deals

Discover exclusive flight deals for travel between Ontario and London in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,689,106 searches. Data last updated May 6, 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.

Ontario to London flights leaving soon

Consider one of these great deals we found on last-minute flights from Ontario to London. Users should examine the flight details to ensure there are no surprises.

One-way flights to London from Ontario

Users in need of a one-way flight from Ontario to London can choose from these deals. Those seeking round-trip flights from Ontario to London should utilize the search form at the the top of the page.

Find flights from Ontario to London within your budget

When is the best time to book a flight from Ontario to London?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to London. Price data was last updated on May 3, 2024.

To ensure you get the cheapest price possible for a flight from Ontario to London, you should look to book at least 72 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.

When is the cheapest time to fly from Ontario to London?

Use this chart to determine the cheapest time to fly round-trip from Ontario to London. Price data was last updated on April 28, 2024.

Average price of flights to London by month

Plan your trip from Ontario to London by taking into account the cheapest months to travel. The average price of a one-way flight from Ontario to London is currently $466 while a round-trip flight costs $703. Price data was last updated on April 28, 2024.

Temperature and rainfall in London by month

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

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated May 6, 2024.

Get a feel of what it's like to fly with United Airlines, Delta and American Airlines from Ontario to London by reading reviews from past customers. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

Can I find flights from Ontario to London for under $700 on Cheapflights?

Are there last-minute flights available from Ontario to London for under $800?

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

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

What are the most popular routes from Ontario to London?

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

What does ONT to LHR mean?

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

Can I find deals on flights from Ontario to London with specific airlines?

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

How can I find direct flights from Ontario to London?

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

Can I find deals for flights from Ontario to London that allow pets onboard?

Can I find deals on last-minute flights from Ontario to London?

How recently were the Ontario to London flight deals updated?

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 Ontario to LondonSee prices for flight routes from nearby airports that may be better suited for you.

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Top 6 airlines flying from Ontario to London

Popular flight searches

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Search flights from Ontario to London by cabin class

Find flights from Ontario to London, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

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

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

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

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Alternative routes for Ontario to London
See prices for flight routes from nearby airports that may be better suited for you.