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Cheap flights from Ontario (ONT) to the United Kingdom 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
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How far in advance should I book a flight from Ontario to United Kingdom?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 59 days in advance, which can save you up to 58% on flights from Ontario to United Kingdom compared to booking the week you need them. Waiting 59 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $896. For sooner than that we have options available in the next 3 days from $1,251.

What is the cheapest month to fly from Ontario to United Kingdom?

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 United Kingdom. Flights to United Kingdom 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 United Kingdom (ONT - GB)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to United Kingdom as you normally would.

Cheap Air Canada flights from Ontario to United Kingdom

Explore cheap flight options specifically provided by Air Canada for the route between Ontario and United Kingdom. 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 2,944,896 searches. Data last updated April 28, 2024.
Find some of the cheapest Air Canada flights traveling from Ontario to United Kingdom. Make sure to double check the flight details before booking.
Sun 9/296:20 pmONT - LHR
2 stops28h 10mAir Canada
Wed 10/92:10 pmLHR - ONT
2 stops16h 46mAir Canada
Deal found 4/28$700
Tue 9/175:15 amONT - LHR
2 stops17h 20mAir Canada
Thu 9/262:05 pmLHR - ONT
2 stops35h 12mAir Canada
Deal found 4/27$749
Mon 9/305:15 amONT - LHR
2 stops17h 20mAir Canada
Thu 10/1012:05 pmLHR - ONT
2 stops18h 51mAir Canada
Deal found 4/28$774

Cheap Virgin Atlantic flights from Ontario to United Kingdom

Explore cheap flight options specifically provided by Virgin Atlantic for the route between Ontario and United Kingdom. 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 2,944,896 searches. Data last updated April 28, 2024.
Have a look at some of the cheapest available Virgin Atlantic flights departing from Ontario and landing in United Kingdom. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
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
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
Tue 5/75:45 amONT - LHR
2 stops16h 35mVirgin Atlantic
Tue 5/1412:45 pmLHR - ONT
2 stops18h 58mVirgin Atlantic
Deal found 4/28$985

Cheap Ontario to United Kingdom flights in April & May 2024

Find cheap flight options from Ontario to United Kingdom specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,944,896 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 United Kingdom in 2024. Check back in a little while for more flight options.
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
Thu 5/22:00 pmONT - LBA
2 stops35h 30mKLM
Mon 5/65:20 pmLBA - ONT
2 stops32h 42mKLM
Deal found 4/26$728
Fri 5/171:20 pmONT - LHR
1 stop12h 40mKLM
Tue 5/2110:55 amLHR - ONT
1 stop13h 41mKLM
Deal found 4/28$756
Sun 5/126:00 amONT - LHR
1 stop20h 25mUnited Airlines
Tue 5/282:50 pmLHR - ONT
1 stop13h 58mUnited Airlines
Deal found 4/28$763
Sun 5/126:00 amONT - LHR
2 stops17h 15mDelta
Tue 5/286:15 amLHR - ONT
2 stops19h 47mDelta
Deal found 4/28$771
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

Ontario to United Kingdom 2024 flight deals

Discover exclusive flight deals for travel between Ontario and United Kingdom in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,944,896 searches. Data last updated April 28, 2024.
Listed are some of the best fares we've found on flights departing from Ontario to United Kingdom in 2024. Check back in a little while for more flight options.
Wed 5/81:20 pmONT - LHR
1 stop12h 40mKLM
Wed 5/1511:00 amLHR - ONT
1 stop13h 36mKLM
Deal found 4/26$634
Tue 10/111:59 pmONT - LGW
2 stops24h 11mMultiple Airlines
Tue 10/153:05 pmLGW - ONT
2 stops28h 19mMultiple Airlines
Deal found 4/28$637
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 10/297:00 amONT - LHR
1 stop17h 45mDelta
Fri 11/86:20 amLHR - ONT
2 stops21h 02mDelta
Deal found 4/27$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 10/11:42 pmONT - LHR
2 stops15h 33mDelta
Tue 10/89:00 amLHR - ONT
2 stops21h 28mDelta
Deal found 4/26$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 10/1512:45 pmONT - LHR
1 stop14h 05mBritish Airways
Wed 10/238:40 amLHR - ONT
1 stop16h 53mBritish Airways
Deal found 4/28$668

Ontario to United Kingdom flights leaving soon

Find last-minute flight options from Ontario to United Kingdom 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 2,944,896 searches. Data last updated April 28, 2024.
Have a look at some of the flights available from Ontario to United Kingdom departing last-minute. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
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
Mon 4/2910:45 amONT - BHX
2 stops22h 40mUnited Airlines
Tue 5/79:10 amBHX - ONT
2 stops19h 43mUnited Airlines
Deal found 4/28$954
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
Sun 5/52:53 pmONT - LHR
1 stop13h 22mIberia
Thu 5/164:25 pmLHR - ONT
1 stop15h 31mIberia
Deal found 4/28$981
Tue 5/75:45 amONT - LHR
2 stops16h 35mVirgin Atlantic
Tue 5/1412:45 pmLHR - ONT
2 stops18h 58mVirgin Atlantic
Deal found 4/28$985
Fri 5/310:46 amONT - LHR
1 stop13h 14mIberia
Wed 9/114:25 pmLHR - ONT
1 stop15h 01mIberia
Deal found 4/26$988

One-way flights to United Kingdom from Ontario

Search for one-way flight options from Ontario to United Kingdom. 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 2,944,896 searches. Data last updated April 28, 2024.
Take a look at some of the one-way flights we've detected from Ontario to United Kingdom. Those needing a return flight from Ontario to United Kingdom can use the search form above.
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
Tue 10/17:00 amONT - LGW
2 stops19h 00mVirgin Atlantic
Deal found 4/27$461
Wed 5/151:20 pmONT - LHR
1 stop12h 40mDelta
Deal found 4/26$463
Wed 10/161:42 pmONT - LHR
1 stop12h 18mKLM
Deal found 4/28$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

Find flights from Ontario to United Kingdom within your budget

Customize your flight search to find flights from Ontario to United Kingdom 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 2,944,896 searches. Data last updated April 28, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$634 - $715

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 Gatwick

ONT - LGW

ONTLGW

Ontario

Tue 10/1

2 stops24h 11m

London Gatwick

Tue 10/15

2 stops28h 19m

$637

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 Gatwick

ONT - LGW

ONTLGW

Ontario

Tue 10/1

2 stops15h 29m

London Gatwick

Tue 10/15

2 stops19h 29m

$672

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

Sun 9/29

1 stop12h 10m

London Heathrow

Fri 10/11

1 stop13h 42m

$688

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Sun 9/29

2 stops28h 10m

London Heathrow

Wed 10/9

2 stops16h 46m

$700

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

Thu 8/8

1 stop14h 25m

London Heathrow

Wed 8/21

2 stops21h 49m

$715

Flights are sorted by cheapest first

Deals found on 4/26

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. 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 United Kingdom. Reviews last updated April 28, 2024.
Get a feel of what it's like to fly with Air Canada, Virgin Atlantic and American Airlines from Ontario to United Kingdom by reading reviews from past customers. In addition to providing an overall rating, 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

Food

7.4

Boarding

8.2

Overall

8.1

Entertainment

8.0

Comfort

7.9

Crew

8.6

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

Food

7.4

Boarding

8.2

Overall

8.1

Entertainment

8.0

Comfort

7.9

Crew

8.6

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

Food

7.4

Boarding

8.2

Overall

8.1

Entertainment

8.0

Comfort

7.9

Crew

8.6

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

Food

7.4

Boarding

8.2

Overall

8.1

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

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

JetBlue
7.6
Good
4,582 reviews
Delta
8.1
Very good
10,932 reviews
Check prices

Food

7.4

Boarding

8.2

Overall

8.1

Entertainment

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

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

Avianca
7.5
Good
3,900 reviews
Delta
8.1
Very good
10,932 reviews
Check prices

Food

7.4

Boarding

8.2

Overall

8.1

Entertainment

8.0

Comfort

7.9

Crew

8.6

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 United Kingdom. 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 United Kingdom?

    If you book a flight to United Kingdom 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.

  • Can I find flights from Ontario to United Kingdom for under $700 on Cheapflights?

    Yes, there are multiple flights from Ontario to United Kingdom for under $700. The cheapest flight booked recently is on KLM for just $634, but on average you can expect to pay $678.

  • Are there last-minute flights available from Ontario to United Kingdom for under $700?

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

  • What are the cheapest airlines to fly from Ontario to United Kingdom one-way?

    The cheapest airline one-way is Air Canada, with whom users have recently found tickets for as low as $352. However, be on the lookout for offers from Virgin Atlantic and Delta, as they are both options that can get you from Ontario to United Kingdom for a low price.

  • What are the most popular routes from Ontario to United Kingdom?

    Most travelers choose Ontario - London Heathrow, Ontario - London Gatwick or Ontario - Edinburgh Turnhouse when deciding on the best route from Ontario to United Kingdom.

  • What are the most popular airlines that fly from Ontario to United Kingdom?

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

  • What does ONT to LHR mean?

    ONT and LHR are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. ONT to LHR refers to a flight route from Ontario Airport to London Heathrow Airport. Manchester Airport (MAN), Edinburgh Turnhouse Airport (EDI), London Gatwick Airport (LGW), Birmingham Airport (BHX), Glasgow Intl Airport (GLA) are other airports near this flight route and their unique identifiers/IATA codes.

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

    The amount of baggage you can bring on your Ontario to United Kingdom 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 United Kingdom with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to United Kingdom 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 United Kingdom that include hotel bookings?

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

  • How can I find direct flights from Ontario to United Kingdom?

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

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

    Yes. Cheapflights offers flight deals from Ontario to United Kingdom 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 United Kingdom that allow pets onboard?

    Many airlines flying from Ontario to United Kingdom 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 United Kingdom?

    Yes, you can often find last-minute deals on Ontario to United Kingdom 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 United Kingdom flight deals updated?

    The Ontario to United Kingdom flight deals you see on this page were last updated on 4/28.

See more FAQs

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Alternative routes for Ontario to United Kingdom
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Top 6 airlines flying from Ontario to United Kingdom

Discover the top 6 airlines that operate flights from Ontario to United Kingdom. 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 2,944,896 searches. Data last updated April 28, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$482Average$954FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Virgin AtlanticCheapest$590Average$666FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest$597Average$975FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest$602Average$956FlexibilityNo 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
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Search flights from Ontario to United Kingdom by cabin class

Find flights from Ontario to United Kingdom, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
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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 United Kingdom?

Cheapflights helps you search for flights from Ontario to United Kingdom via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ontario to United Kingdom.

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

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

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

Yes, Cheapflights offers price alerts on Ontario to United Kingdom flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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