HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Ontario (ONT) to Heathrow (LHR) from $348

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 9/30. 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.
ONT — LHR
May 3 — May 101
From?
To?
Fri 5/3
Fri 5/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

The best prices from Ontario to London Heathrow are usually found in February or January, booked 46 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Cheap flight deals from Ontario to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 28, 2024.

Popular in

July

Cheapest in

February

Round-trip from

$644

One-way from

$491
High demand for flights, 28% potential price rise
Search Deals
Best time to find cheap flights, 27% potential price drop
Search Deals
From Ontario to London Heathrow
Search Deals
One-way flight from Ontario to London Heathrow
Search Deals

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

Friday flights are generally found to be more expensive for flights from Ontario to London Heathrow Airport. 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 Heathrow Airport.

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

Find a great deal and save up to 58% by booking at least 59 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ontario to London Heathrow Airport within the next two weeks, with the cheapest ticket starting at $896.

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

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, October can be a great choice for travel to London Heathrow Airport. Flights to London Heathrow Airport from Ontario in October are about $787 on average during October, but can be found for as low as $419.

When is the cheapest time to fly from Ontario to London Heathrow Airport (ONT - LHR)?

It’s typically best to fly out from Ontario to London Heathrow Airport at noon. Doing so could potentially save you 26% on the flight price compared to flying in the evening, which is usually more expensive.

Cheap American Airlines flights from Ontario to Heathrow

Explore cheap flight options specifically provided by American Airlines for the route between Ontario and Heathrow. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.
Consider these cheap American Airlines flights we've found departing from Ontario to London. Be sure to come back soon if the deals available don't appeal to you at this time.
Tue 10/18:41 amONT - LHR
1 stop15h 19mAmerican Airlines
Tue 10/151:00 pmLHR - ONT
2 stops16h 44mAmerican Airlines
Deal found 4/27$673
Thu 10/172:52 pmONT - LHR
1 stop13h 53mAmerican Airlines
Thu 10/318:40 amLHR - ONT
1 stop18h 33mAmerican Airlines
Deal found 4/27$717
Thu 9/1912:40 pmONT - LHR
1 stop16h 55mAmerican Airlines
Mon 9/309:15 amLHR - ONT
1 stop20h 45mAmerican Airlines
Deal found 4/27$767
Tue 8/274:45 pmONT - LHR
1 stop12h 50mAmerican Airlines
Wed 9/183:15 pmLHR - ONT
1 stop14h 45mAmerican Airlines
Deal found 4/26$919
Tue 8/274:45 pmONT - LHR
1 stop12h 50mAmerican Airlines
Wed 9/183:15 pmLHR - ONT
1 stop14h 45mAmerican Airlines
Deal found 4/27$920
Wed 7/104:31 pmONT - LHR
1 stop13h 04mAmerican Airlines
Fri 7/261:10 pmLHR - ONT
2 stops16h 36mAmerican Airlines
Deal found 4/27$929
Sun 5/510:37 amONT - LHR
1 stop16h 08mAmerican Airlines
Tue 5/148:50 amLHR - ONT
2 stops17h 32mAmerican Airlines
Deal found 4/27$950
Sun 5/512:53 pmONT - LHR
2 stops15h 17mAmerican Airlines
Tue 5/148:50 amLHR - ONT
2 stops17h 32mAmerican Airlines
Deal found 4/27$953
Sun 9/14:45 pmONT - LHR
1 stop12h 50mAmerican Airlines
Sun 9/153:15 pmLHR - ONT
1 stop14h 45mAmerican Airlines
Deal found 4/26$969

Cheap Virgin Atlantic flights from Ontario to Heathrow

Explore cheap flight options specifically provided by Virgin Atlantic for the route between Ontario and Heathrow. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.
Browse through some of the cheapest Virgin Atlantic flights traveling from Ontario to London. Deals frequently update to provide users with more options.
Thu 8/812:45 pmONT - LHR
1 stop14h 25mVirgin Atlantic
Wed 8/219:55 amLHR - ONT
2 stops21h 49mVirgin Atlantic
Deal found 4/26$715
Sun 5/1211:20 amONT - LHR
1 stop14h 30mVirgin Atlantic
Tue 5/2810:55 amLHR - ONT
1 stop13h 41mVirgin Atlantic
Deal found 4/27$773
Wed 8/216:00 amONT - LHR
1 stop20h 00mVirgin Atlantic
Sun 8/256:15 amLHR - ONT
2 stops24h 23mVirgin Atlantic
Deal found 4/27$817

Cheap Ontario to Heathrow flights in April & May 2024

Find cheap flight options from Ontario to Heathrow specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,991,349 searches. Prices were last updated on April 28, 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.
Wed 5/81:20 pmONT - LHR
1 stop12h 40mKLM
Wed 5/1511:00 amLHR - ONT
1 stop13h 36mKLM
Deal found 4/26$634
Wed 5/151:20 pmONT - LHR
1 stop12h 40mKLM
Thu 5/3010:55 amLHR - ONT
1 stop13h 41mKLM
Deal found 4/26$669
Wed 5/151:20 pmONT - LHR
1 stop12h 40mKLM
Wed 5/2211:00 amLHR - ONT
1 stop13h 36mKLM
Deal found 4/27$706
Mon 5/202:50 pmONT - LHR
1 stop13h 25mIberia
Thu 6/611:30 amLHR - ONT
2 stops20h 29mIberia
Deal found 4/27$756
Wed 5/151:20 pmONT - LHR
1 stop12h 40mKLM
Tue 5/2810:55 amLHR - ONT
1 stop13h 41mKLM
Deal found 4/27$773
Sat 5/111:36 pmONT - LHR
1 stop14h 44mUnited Airlines
Sat 5/182:50 pmLHR - ONT
1 stop14h 03mUnited Airlines
Deal found 4/27$806
Sat 5/112:50 pmONT - LHR
1 stop13h 25mIberia
Sun 5/191:10 pmLHR - ONT
1 stop14h 58mIberia
Deal found 4/26$821
Tue 5/2112:53 pmONT - LHR
1 stop14h 12mBritish Airways
Mon 6/1011:00 amLHR - ONT
1 stop15h 37mBritish Airways
Deal found 4/27$823
Sat 5/185:15 amONT - LHR
2 stops17h 15mMultiple Airlines
Wed 5/298:30 amLHR - ONT
2 stops21h 59mMultiple Airlines
Deal found 4/26$829

Ontario to Heathrow 2024 flight deals

Discover exclusive flight deals for travel between Ontario and Heathrow in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 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.
Wed 5/81:20 pmONT - LHR
1 stop12h 40mKLM
Wed 5/1511:00 amLHR - ONT
1 stop13h 36mKLM
Deal found 4/26$634
Tue 10/152:52 pmONT - LHR
1 stop13h 53mBritish Airways
Wed 10/307:30 amLHR - ONT
2 stops23h 37mBritish Airways
Deal found 4/27$651
Tue 10/111:30 amONT - LHR
1 stop19h 20mDelta
Tue 10/89:00 amLHR - ONT
2 stops21h 28mDelta
Deal found 4/26$661
Tue 9/248:41 amONT - LHR
1 stop15h 19mBritish Airways
Tue 10/16:55 amLHR - ONT
2 stops22h 47mBritish Airways
Deal found 4/27$662
Tue 10/297:00 amONT - LHR
2 stops17h 55mDelta
Fri 11/86:20 amLHR - ONT
2 stops24h 13mDelta
Deal found 4/27$665
Tue 9/247:00 amONT - LHR
2 stops19h 15mDelta
Tue 10/16:15 amLHR - ONT
2 stops21h 07mDelta
Deal found 4/27$666
Tue 10/2910:56 amONT - LHR
1 stop18h 09mAmerican Airlines
Fri 11/88:40 amLHR - ONT
1 stop19h 33mAmerican Airlines
Deal found 4/27$667
Tue 10/152:52 pmONT - LHR
1 stop13h 53mBritish Airways
Tue 10/221:05 pmLHR - ONT
1 stop16h 37mBritish Airways
Deal found 4/27$668
Wed 5/151:20 pmONT - LHR
1 stop12h 40mKLM
Thu 5/3010:55 amLHR - ONT
1 stop13h 41mKLM
Deal found 4/26$669

Ontario to Heathrow flights leaving soon

Find last-minute flight options from Ontario to Heathrow for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.
Have a look at some of the flights available from Ontario to London departing last-minute. Tip: verify your flight details before completing your reservation.
Wed 5/81:20 pmONT - LHR
1 stop12h 40mKLM
Wed 5/1511:00 amLHR - ONT
1 stop13h 36mKLM
Deal found 4/26$634
Sun 5/510:37 amONT - LHR
1 stop16h 08mAmerican Airlines
Tue 5/148:50 amLHR - ONT
2 stops17h 32mAmerican Airlines
Deal found 4/27$950
Sun 5/512:53 pmONT - LHR
2 stops15h 17mAmerican Airlines
Tue 5/148:50 amLHR - ONT
2 stops17h 32mAmerican Airlines
Deal found 4/27$953
Sun 5/52:53 pmONT - LHR
1 stop13h 22mAmerican Airlines
Tue 5/149:15 amLHR - ONT
1 stop17h 44mAmerican Airlines
Deal found 4/27$979
Sun 5/512:53 pmONT - LHR
1 stop13h 52mBritish Airways
Tue 5/2110:05 amLHR - ONT
1 stop16h 17mBritish Airways
Deal found 4/27$980
Fri 5/310:46 amONT - LHR
1 stop13h 14mIberia
Wed 9/114:25 pmLHR - ONT
1 stop15h 01mIberia
Deal found 4/26$988
Fri 5/31:36 pmONT - LHR
1 stop12h 04mUnited Airlines
Fri 5/102:50 pmLHR - ONT
1 stop14h 03mUnited Airlines
Deal found 4/26$989
Sun 5/55:15 amONT - LHR
2 stops17h 15mMultiple Airlines
Tue 5/218:30 amLHR - ONT
2 stops22h 34mMultiple Airlines
Deal found 4/27$992
Sun 5/510:37 amONT - LHR
1 stop13h 23mIberia
Tue 5/2111:30 amLHR - ONT
2 stops20h 26mIberia
Deal found 4/27$1,028

One-way flights to Heathrow from Ontario

Search for one-way flight options from Ontario to Heathrow. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.
Users in need of a one-way flight from Ontario to London can choose from these deals. Users in need of a round-trip flight from Ontario to London instead should update the search form at the top of page.
Mon 9/3012:49 amONT - LHR
2 stops27h 06mMultiple Airlines
Deal found 4/27$348
Tue 10/15:15 amONT - LHR
2 stops17h 15mAir Canada
Deal found 4/27$352
Mon 9/305:15 amONT - LHR
2 stops17h 20mAir Canada
Deal found 4/27$396
Tue 10/112:45 pmONT - LHR
1 stop14h 25mVirgin Atlantic
Deal found 4/27$461
Wed 5/151:20 pmONT - LHR
1 stop12h 40mDelta
Deal found 4/26$463
Wed 10/231:42 pmONT - LHR
1 stop12h 18mKLM
Deal found 4/27$477
Sun 10/64:45 pmONT - LHR
1 stop12h 50mBritish Airways
Deal found 4/27$483
Mon 9/302:52 pmONT - LHR
1 stop13h 53mBritish Airways
Deal found 4/27$488
Sat 10/1911:00 pmONT - LHR
1 stop24h 30mAmerican Airlines
Deal found 4/27$491

Find flights from Ontario to Heathrow within your budget

Customize your flight search to find flights from Ontario to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$634 - $749

Route

Depart

Return

Price

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Wed 5/8

1 stop12h 40m

London Heathrow

Wed 5/15

1 stop13h 36m

$634

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Tue 10/15

1 stop13h 53m

London Heathrow

Wed 10/30

2 stops23h 37m

$651

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Tue 10/1

1 stop19h 20m

London Heathrow

Tue 10/8

2 stops21h 28m

$661

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Tue 10/1

1 stop15h 19m

London Heathrow

Tue 10/15

2 stops16h 44m

$673

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Tue 10/15

1 stop13h 44m

London Heathrow

Thu 10/24

2 stops22h 11m

$686

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Tue 10/1

1 stop14h 50m

London Heathrow

Tue 10/8

1 stop14h 12m

$688

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Tue 10/15

2 stops17h 15m

London Heathrow

Tue 10/29

2 stops25h 33m

$694

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Thu 8/8

1 stop14h 25m

London Heathrow

Wed 8/21

2 stops21h 49m

$715

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Tue 9/17

2 stops17h 20m

London Heathrow

Thu 9/26

2 stops35h 12m

$749

Flights are sorted by cheapest first

Deals found on 4/26

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

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Heathrow. Price data was last updated on January 28, 2024.
The price you pay for your flight from Ontario to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 46 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

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

Use this chart to determine the cheapest time to fly round-trip from Ontario to Heathrow. Price data was last updated on April 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ontario to London Heathrow Airport flight should consider departing on Thursday afternoons when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Heathrow by month

Plan your trip from Ontario to Heathrow by taking into account the cheapest months to travel. The average price of a one-way flight from Ontario to Heathrow is currently $440 while a round-trip flight costs $683. Price data was last updated on April 21, 2024.

Currently, November is the cheapest month in which you can book a flight from Ontario to London Heathrow Airport (average of $653). Flying from Ontario to London Heathrow Airport in June is currently the most expensive (average of $1,173). 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

$675

February

$664

March

$715

April

$700

May

$748

June

$1,173

July

$987

August

$779

September

$748

October

$712

November

$653

December

$672

Temperature and rainfall in Heathrow by month

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

LON

Temperature

39.2 - 62.6 °F

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated April 28, 2024.
See what other customers who have flown with American Airlines, Virgin Atlantic and Delta from Ontario to London have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,932 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Crew

8.6

Food

7.4

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Delta
8.1
Very good
10,932 reviews
Delta
8.1
Very good
10,932 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Crew

8.6

Food

7.4

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

KLM
7.9
Good
1,623 reviews
Delta
8.1
Very good
10,932 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Crew

8.6

Food

7.4

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Virgin Atlantic
7.7
Good
745 reviews
Delta
8.1
Very good
10,932 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Crew

8.6

Food

7.4

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Avianca
7.5
Good
3,909 reviews
Delta
8.1
Very good
10,932 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Crew

8.6

Food

7.4

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

United Airlines
7.4
Good
11,221 reviews
Delta
8.1
Very good
10,932 reviews
Check prices

Comfort

7.9

Entertainment

8.0

Crew

8.6

Food

7.4

Overall

8.1

Boarding

8.2

Reviews

1 / 10

Not sufficient leg room and three seats are very tigh.t on 737 in economy main cabin

Related info for your journey

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

    If you book a flight to London Heathrow from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario. There are 0 flights from Ontario to London Heathrow per day from 6 different airlines.

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

    Yes, there are multiple flights from Ontario to London Heathrow Airport for under $700. The cheapest flight booked recently is on KLM for just $634, but on average you can expect to pay $685.

  • Are there last-minute flights available from Ontario to London Heathrow Airport for under $700?

    There are currently 20+ open flights from Ontario to London Heathrow Airport within the next 7 days for less than $700.

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

    According to our current data, KLM ($634), British Airways ($651), and Delta ($661) offers the cheapest pricing from Ontario to London Heathrow Airport. KLM is 24% cheaper than the average price of flights available within the next 90 days to this destination.

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

    To fly one-way, consider booking your trip with Air Canada, which is currently one of the cheapest options available, starting at $352. Virgin Atlantic flights start at $461 while deals on Delta start at $463 one-way.

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

    When booking a flight from Ontario to London Heathrow Airport, you may want to consider flying on American Airlines, British Airways or Delta as they are the most popular for this route.

  • What does ONT to LHR mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Ontario Airport to London Heathrow Airport flight would often be abbreviated as a ONT to LHR flight.

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

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

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

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

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

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

  • How can I find direct flights from Ontario to Heathrow?

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

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

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

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

    Many airlines flying from Ontario to Heathrow 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.

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

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

  • How recently were the Ontario to London Heathrow Airport flight deals updated?

    The Ontario to London Heathrow Airport flight deals you see on this page were last updated on 4/27.

See more FAQs

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 Heathrow
See prices for flight routes from nearby airports that may be better suited for you.

Los Angeles to Heathrow flights
San Francisco to Heathrow flights
Los Angeles to London City flights
San Francisco to London City flights
San Francisco to Gatwick flights
Los Angeles to Gatwick flights
San Diego to Heathrow flights
Los Angeles to Luton flights
Oakland to Heathrow flights
San Jose to Heathrow flights
Burbank to Heathrow flights
Santa Ana to Heathrow flights
San Diego to Gatwick flights
Oakland to Gatwick flights
San Diego to London City flights
San Jose to Gatwick flights
Burbank to Gatwick flights
Santa Ana to Gatwick flights
San Jose to London City flights
Los Angeles to Southend flights
Sacramento to Heathrow flights
Sacramento to Gatwick flights
Santa Ana to London City flights
Sacramento to London City flights
Santa Barbara to Heathrow flights
Ontario to Gatwick flights
Los Angeles to Stansted flights
Reno to Heathrow flights
Santa Rosa to Heathrow flights
Reno to Gatwick flights
San Francisco to Luton flights
Fresno to Heathrow flights
Long Beach to Heathrow flights
Arcata to Heathrow flights
San Diego to Stansted flights
Monterey to Heathrow flights
Burbank to London City flights
Palm Springs to Heathrow flights
Reno to London City flights
Oakland to London City flights
San Francisco to Stansted flights
Ontario to London City flights
San Luis Obispo to Heathrow flights
Palm Springs to London City flights
Fresno to Gatwick flights
Fresno to London City flights
Sacramento to Stansted flights
Oakland to Stansted flights

Top 6 airlines flying from Ontario to Heathrow

Discover the top 6 airlines that operate flights from Ontario to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,991,349 searches. Data last updated April 28, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$482Average$691FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Virgin AtlanticCheapest$590Average$666FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest$597Average$931FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest$602Average$831FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$612Average$670FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest$742Average$1,012FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Atlanta to Cancún flights
Phoenix to Houston flights
San Jose to Las Vegas flights
Portland to Denver flights
San Francisco to Puerto Vallarta flights
San Francisco to Amsterdam flights
Chicago to Guadalajara flights
Phoenix to Salt Lake City flights
Atlanta to Los Angeles flights
Chicago to Dubai flights
Pittsburgh to Chicago flights
Ontario to Lihue flights

Search flights from Ontario to Heathrow by cabin class

Find flights from Ontario to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy 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
Flights to Perugia Sant Egidio
Flights to Biarritz Parme
Flights to Argostoli Cephalonia
Flights to Melilla
Flights to Milas–Bodrum
Flights to Girona Costa Brava
Flights to Hakodate
Flights to Fez Sais
Flights to Constantine Ain El Bey
Flights to Zakynthos Dionsios Salomos
Flights to Bourgas
Flights to Bodø
Flights to Reggio Calabria Tito Menniti
Flights to Bastia Poretta
Flights to Skiathos
Flights to Kalamata
Flights to Batumi
Flights to Menorca/Mahon
Flights to Kristiansand Kjevik
Flights to Champaign University-Willard
Flights to Kagoshima
Flights to Ohrid
Flights to Clermont-Ferrand Aulnat
Flights to Parikia Paros

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 Heathrow?

Cheapflights makes it easy to find Ontario to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to Heathrow for you. Better yet — we are completely free to use.

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

Certainly. Search results for flights to Heathrow from Ontario shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes! Start tracking prices for Ontario to Heathrow flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines