Cheap flights from London Heathrow Airport to Los Angeles from $503
This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Los Angeles departing on 9/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Iberia flights from London Heathrow Airport to Ontario
Our best Iberia deals on London Heathrow Airport to Ontario flight tickets
Delta flights from London Heathrow Airport to Ontario
Our best Delta deals on London Heathrow Airport to Ontario flight tickets
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How to get the cheapest flight ticket from London Heathrow Airport 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
What is the cheapest month to fly to Ontario?
In general, February is the cheapest month to fly from London Heathrow Airport to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $589. If you aren’t able to travel during the month of February, then book flights to Ontario from London Heathrow Airport during July instead. Flights to Ontario in July, while not as cheap as those in February, still average around $601.
What is the cheapest day to depart on your flight to Ontario?
The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $602. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from London Heathrow Airport to Ontario for around $991.
What is the cheapest time of day to depart on your flight to Ontario?
In the afternoon is the cheapest time of day to fly from London Heathrow Airport to Ontario when you can find flight prices for as low as $602. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $814 on average. Flights to Ontario from London Heathrow Airport at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.
How far in advance should I book a flight to Ontario?
You are more likely to see cheaper flights to Ontario from London Heathrow Airport when booking 26 weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $712 when searching 26 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from London Heathrow Airport for as low as $550 on momondo.
What is the cheapest airline that flies from London Heathrow to Ontario?
British Airways, Iberia, and JetBlue are the most popular carriers operating from London Heathrow to Ontario
What airlines fly to Ontario?
British Airways, American Airlines and Delta are the top three most popular airlines that fly to Ontario from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 12 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.
When to book flights from London Heathrow Airport to Ontario
Cheap London Heathrow Airport to Ontario (LHR to ONT) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Ontario
How far is London Heathrow to Ontario by plane?
London Heathrow and Ontario are 5408.1 mi apart from one another. 13h 22m is a normal flight duration for this route.
When did momondo last update prices for flights from London Heathrow Airport to Ontario Airport?
Prices for flights from London Heathrow Airport to Ontario Airport are updated daily.
How many operators does momondo search for flights from London Heathrow Airport to Ontario Airport?
As of June 2025, there is 1 operator available to choose from for flights from London Heathrow Airport to Ontario Airport.
How old do you have to be to fly from London Heathrow Airport to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from London Heathrow Airport to Ontario?
momondo data reveals that the most frequently booked airline on the route from London Heathrow Airport to Ontario is United Airlines, representing 100% of all bookings.
Best airlines flying from London Heathrow Airport to Ontario
Compare and see reviews for airlines that fly from London Heathrow Airport to Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $560 | Free Cancellation | Rating 7.4 8,790 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from London to Ontario?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Ontario. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from London to Ontario with flexible booking policies on momondo?
Yes. All flights to Ontario from London on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from London to Ontario?
Once all potential London to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from London to Ontario right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Ontario from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.