Cheap Flights from London Heathrow to Ontario International

Compare London Heathrow to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from London Heathrow to Ontario International

Looking for a cheap last-minute deal or the best return flight from London Heathrow Airport to Ontario International Airport? If you want to travel next month, return fares start from Rs197,364. Find the lowest prices on one-way and return tickets right here.

Ontario.Rs136,626 per passenger.Departing Sat, 31 Oct.One-way flight with Iberia.Outbound indirect flight with Iberia, departs from London Heathrow on Sat, 31 Oct, arriving in Ontario International.Price includes taxes and charges.From Rs136,626, select.

Ontario.Rs137,389 per passenger.Departing Sat, 6 Mar.One-way flight with British Airways.Outbound indirect flight with British Airways, departs from London Heathrow on Sat, 6 Mar, arriving in Ontario International.Price includes taxes and charges.From Rs137,389, select.

Ontario.Rs137,389 per passenger.Departing Mon, 2 Nov.One-way flight with British Airways.Outbound indirect flight with British Airways, departs from London Heathrow on Mon, 2 Nov, arriving in Ontario International.Price includes taxes and charges.From Rs137,389, select.

Ontario.Rs137,389 per passenger.Departing Tue, 1 Sep.One-way flight with British Airways.Outbound indirect flight with British Airways, departs from London Heathrow on Tue, 1 Sep, arriving in Ontario International.Price includes taxes and charges.From Rs137,389, select.

Ontario.Rs137,389 per passenger.Departing Sat, 9 Jan.One-way flight with British Airways.Outbound indirect flight with British Airways, departs from London Heathrow on Sat, 9 Jan, arriving in Ontario International.Price includes taxes and charges.From Rs137,389, select.

Ontario.Rs137,389 per passenger.Departing Fri, 21 Aug.One-way flight with British Airways.Outbound indirect flight with British Airways, departs from London Heathrow on Fri, 21 Aug, arriving in Ontario International.Price includes taxes and charges.From Rs137,389, select.

Ontario.Rs137,389 per passenger.Departing Tue, 1 Dec.One-way flight with British Airways.Outbound indirect flight with British Airways, departs from London Heathrow on Tue, 1 Dec, arriving in Ontario International.Price includes taxes and charges.From Rs137,389, select.

Ontario.Rs138,932 per passenger.Departing Sat, 24 Apr.One-way flight with British Airways.Outbound indirect flight with British Airways, departs from London Heathrow on Sat, 24 Apr, arriving in Ontario International.Price includes taxes and charges.From Rs138,932, select.

Ontario.Rs139,938 per passenger.Departing Mon, 22 Feb.One-way flight with United.Outbound indirect flight with United, departs from London Heathrow on Mon, 22 Feb, arriving in Ontario International.Price includes taxes and charges.From Rs139,938, select.

Ontario.Rs156,708 per passenger.Departing Tue, 23 Jun.One-way flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Tue, 23 Jun, arriving in Ontario International.Price includes taxes and charges.From Rs156,708, select.

Ontario.Rs162,896 per passenger.Departing Wed, 1 Jul.One-way flight with Aer Lingus.Outbound indirect flight with Aer Lingus, departs from London Heathrow on Wed, 1 Jul, arriving in Ontario International.Price includes taxes and charges.From Rs162,896, select.

Ontario.Rs936,843 per passenger.Departing Sat, 1 May.One-way flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from London Heathrow on Sat, 1 May, arriving in Ontario International.Price includes taxes and charges.From Rs936,843, select.

Find the cheapest month to fly from London Heathrow to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London Heathrow to Ontario International flights are currently cheapest in October.

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London Heathrow to Ontario International: Alternative routes

Compare routes from London Heathrow to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier than Ontario International.

London to Ontario: Flight information

The things to know before you go.

Cheapest flight found	Rs137,122
Cheapest month to fly	October

Finding cheap flights from London Heathrow to Ontario International: Frequently asked questions

How much are return flights from London Heathrow to Ontario International?

The best price we found for a return flight from London Heathrow to Ontario International is Rs190,755. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from London Heathrow to Ontario International?

Currently, there are no airlines that fly direct from London Heathrow to Ontario International. But we found flights with one or more stops from Rs190,755.

How many flights are there a week from London Heathrow to Ontario International?

As of June 2026, there are no flights flying from London Heathrow to Ontario International.

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

The cheapest month to fly from London Heathrow to Ontario International is usually September.

Which upcoming date is cheapest to fly from London Heathrow Airport to Ontario International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to Ontario International Airport on Sunday, 6 September 2026.

Can I get a direct flight from London Heathrow Airport to Ontario International Airport?

No airlines currently offer direct flights between London Heathrow Airport and Ontario International Airport. Most routes have one or more stops.

How can I find the best flight deal to Ontario International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Ontario?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from London Heathrow Airport to Ontario International with?

Currently, United offers the cheapest flight tickets to Ontario International.

Travelling from London Heathrow Airport (LHR) to Ontario International Airport (ONT): what you need to know

The timezone in Ontario is UTC-7, which is seven hours behind London.
Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules worth sticking to. Be at the airport on time to board your LHR to ONT flight.
During popular months such as July, it's a good idea to get to the airport earlier than normal. Plan to arrive two hours before domestic departures and four hours ahead for international flights whenever you're flying during peak periods in general.
Consider adding a stopover when booking your ticket from London Heathrow Airport to Ontario International Airport. Simply deselect 'Direct flights only' to break up your journey, or perhaps see a new city along the way. Here are some options between LHR and ONT:
- Harry Reid Airport (formerly McCarran Airport)
- Denver International Airport
- Portland International Airport

How to find the cheapest flights from London Heathrow Airport (LHR) to Ontario International Airport (ONT)

Rs137,122 is currently the best price for a one-way London Heathrow Airport to Ontario International Airport flight. Return flights start from Rs191,448. These fares may change depending on availability.
To get your hands on cheap tickets from LHR to ONT, book ahead. Airlines typically offer their most competitively priced fares when flights are first made available.
The 'Whole month' search tool shows you the cheapest flights from London Heathrow Airport to Ontario International Airport across each month. It's a great way to snap up a bargain if your trip dates are flexible.
There's no need to check every day to see if fares have gone down when you set up a Price Alert. We'll notify you as soon as there's a better deal on cheap flights from LHR to ONT.
Lock in the perfect flight for you by using the filters. To see the 'Fastest,' 'Cheapest' or 'Best' flights from London Heathrow Airport to Ontario International Airport, use the 'Sort by' tool. You can also filter results by departure and arrival times, airline, and journey duration.

Handy information about London Heathrow Airport (LHR)

When it comes to the on-time performance of London Heathrow Airport, data shows 68.18% of flights meet their scheduled arrival time.
To reach London Heathrow Airport from central London, it'll take around 55 minutes if you're going by car. Of course, this depends on traffic conditions. It's approximately 31 kilometres from the airport to the city centre.
Expect a journey time of about 1 hour on public transport.
Need a convenient hotel close to LHR? If you're boarding an early flight from London Heathrow Airport to Ontario International Airport, these stays will have you moments from check-in:

Arriving at Ontario International Airport (ONT)

The last thing you need is a long journey to your hotel if you're getting in late on a London Heathrow Airport to Ontario International Airport flight. Stay at one of these accommodation options near ONT instead:
Say yes to new adventures by picking up an Ontario International Airport rental car. Grab your wheels from Dollar, Fox - Rent A Car or Thrifty and explore beyond Ontario's main sights.
Reserving your ride from Ontario International Airport about three weeks ahead can help you get the best possible rate.

Getting from Ontario International Airport (ONT) to central Ontario

You'll find ONT at 2900 E. Airport Drive.
Ontario International Airport is roughly 6 kilometres from the centre of Ontario. The drive time takes about 10 minutes.
Getting there on public transport takes about 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

It's time to work out your travel dates for your flight from London Heathrow Airport to Ontario International Airport. August is the busiest month to visit Ontario. If you prefer a more relaxed vibe, go in May.
Book your flight from London Heathrow Airport to Ontario International Airport for August if you'd like to go to Ontario during its warmest month. Expect temperatures of between 15ºC and 35ºC.
If you want cooler conditions, search for a cheap ticket from LHR to ONT in January. Average temperatures are between 4ºC and 23ºC then.

Explore more of United States

Los Angeles is just one of the many cities in United States waiting to be discovered after you've seen Ontario. Around 56 kilometres away to the west, popular attractions include Griffith Observatory, The Broad and La Brea Tar Pits & Museum.
San Diego is another sought-after destination in United States and is around 153 kilometres south of Ontario. No journey is complete without seeing San Diego Zoo, USS Midway Museum and SeaWorld San Diego.