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$257+ Cheap flights from Ontario (ONT) to the United Kingdom

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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LHR
Feb 3 — Feb 101
Mon 2/3
Mon 2/10
1 adult, Economy
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Cheap flight deals from Ontario to United Kingdom

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to United Kingdom (GB0). 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 January 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$606
(oojo)

One-way from

$268
(Trip.com)

Popular in

June

Cheapest in

October

Average price

$686
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From Ontario to United Kingdom
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One-way flight from Ontario to United Kingdom
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Highest demand for flights based on searches. 16% potential increase in price ($146 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Find flight deals from Ontario to United Kingdom

Cheapest flights from Ontario to United Kingdom
Explore the most affordable flight options available from Ontario to United Kingdom. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2025.

This oojo deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/276:05 amONT - MAN
2 stops20h 55mBritish Airways
Thu 3/69:45 amMAN - ONT
2 stops20h 15mBritish Airways
Deal found 1/27$606
This Iberia deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/110:51 amONT - LHR
1 stop13h 24mIberia
Tue 3/182:10 pmLHR - ONT
1 stop15h 17mIberia
Deal found 1/28$641
This Trip.com deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/28:01 amONT - LGW
1 stop18h 34mMultiple Airlines
Sun 2/912:00 pmLGW - ONT
1 stop15h 59mMultiple Airlines
Deal found 1/28$643
This oojo deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2710:51 amONT - GLA
2 stops18h 04mBritish Airways
Thu 3/68:55 amGLA - ONT
2 stops22h 58mBritish Airways
Deal found 1/28$647
This Cheapflightsfares deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/55:01 pmONT - LHR
1 stop12h 19mBritish Airways
Wed 11/1910:40 amLHR - ONT
1 stop15h 09mBritish Airways
Deal found 1/28$649
This Delta deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/187:05 amONT - MAN
2 stops18h 35mDelta
Wed 3/512:00 pmMAN - ONT
1 stop18h 52mDelta
Deal found 1/29$650
This oojo deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/272:54 pmONT - ABZ
2 stops16h 41mBritish Airways
Thu 3/69:05 amABZ - ONT
2 stops20h 55mBritish Airways
Deal found 1/28$650
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/26:00 amONT - LHR
2 stops17h 10mUnited Airlines
Tue 3/113:00 pmLHR - ONT
2 stops36h 57mUnited Airlines
Deal found 1/28$652
This Delta deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/16:00 amONT - LHR
1 stop21h 10mDelta
Mon 3/316:30 amLHR - ONT
2 stops23h 52mDelta
Deal found 1/29$660
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/286:00 amONT - MAN
2 stops22h 05mUnited Airlines
Thu 3/66:25 amMAN - ONT
2 stops22h 32mUnited Airlines
Deal found 1/28$673
This KLM deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/71:00 pmONT - LHR
1 stop13h 35mKLM
Mon 2/102:30 pmLHR - ONT
1 stop16h 22mKLM
Deal found 1/28$673
This Iberia deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/63:00 pmONT - MAN
2 stops22h 30mIberia
Fri 9/2610:30 amMAN - ONT
2 stops21h 06mIberia
Deal found 1/28$680

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 2,558,603 searches. Data last updated January 29, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioManchester

ONT - MAN

ONTMAN

Ontario

Thu 2/27

6:05 am-11:00 am

2 stops20h 55m

Manchester

Thu 3/6

9:45 am-10:00 pm

2 stops20h 15m

$606

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sat 3/1

10:51 am-8:15 am

1 stop13h 24m

London Heathrow

Tue 3/18

2:10 pm-10:27 pm

1 stop15h 17m

$641

OntarioLondon

ONT - LGW

ONTLGW

Ontario

Sun 2/2

8:01 am-10:35 am

1 stop18h 34m

London Gatwick

Sun 2/9

12:00 pm-7:59 pm

1 stop15h 59m

$643

OntarioGlasgow

ONT - GLA

ONTGLA

Ontario

Thu 2/27

10:51 am-12:55 pm

2 stops18h 04m

Glasgow Intl

Thu 3/6

8:55 am-11:53 pm

2 stops22h 58m

$647

OntarioManchester

ONT - MAN

ONTMAN

Ontario

Tue 2/18

7:05 am-9:40 am

2 stops18h 35m

Manchester

Tue 3/4

12:00 pm-10:52 pm

1 stop18h 52m

$650

OntarioAberdeen

ONT - ABZ

ONTABZ

Ontario

Thu 2/27

2:54 pm-3:35 pm

2 stops16h 41m

Aberdeen Dyce

Thu 3/6

9:05 am-10:00 pm

2 stops20h 55m

$650

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sun 3/2

5:05 am-9:40 am

1 stop20h 35m

London Heathrow

Tue 3/11

3:00 pm-8:57 pm

2 stops36h 57m

$652

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Sat 3/1

6:00 am-11:10 am

1 stop21h 10m

London Heathrow

Mon 3/31

6:30 am-10:22 pm

2 stops23h 52m

$660

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 2/27

1:05 pm-10:35 am

1 stop13h 30m

London Heathrow

Thu 3/6

2:30 pm-10:52 pm

1 stop16h 22m

$673

OntarioManchester

ONT - MAN

ONTMAN

Ontario

Fri 2/28

6:00 am-12:05 pm

2 stops22h 05m

Manchester

Thu 3/6

6:25 am-8:57 pm

2 stops22h 32m

$673

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to United Kingdom

Have a flexible travel schedule? Discover the best time to fly to United Kingdom from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Ontario to United Kingdom

Get recent, data-driven insights about flights from Ontario to United Kingdom including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Ontario to United Kingdom?

Currently, November is the cheapest month in which you can book a flight from Ontario to United Kingdom (average of $661). Flying from Ontario to United Kingdom in June is currently the most expensive (average of $1,138). 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.

What is the cheapest time of day to fly from ONT to GB?

Find hourly flight availability from Ontario to United Kingdom. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 29, 2025.

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.

Rainfall in United Kingdom by month

Plan your trip to United Kingdom by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in United Kingdom ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit United Kingdom when rainfall is around 1.6 in.

Temperature in United Kingdom by month

Plan your trip to United Kingdom by taking into account the average temperature totals by month.

If weather is an important factor for your trip to United Kingdom, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 January 29, 2025.
Get a feel of what it's like to fly with Delta, KLM and Virgin Atlantic 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
8.0
Very good
8,456 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,456 reviews
Delta
8.0
Very good
8,456 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,335 reviews
Delta
8.0
Very good
8,456 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic
7.5
Good
658 reviews
Delta
8.0
Very good
8,456 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

JetBlue
7.4
Good
3,163 reviews
Delta
8.0
Very good
8,456 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines
7.4
Good
8,922 reviews
Delta
8.0
Very good
8,456 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

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

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $333. However, be on the lookout for offers from JetBlue and Iberia, 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 - Edinburgh Turnhouse or Ontario - Manchester when deciding on the best route from Ontario to United Kingdom.

  • 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.

  • What is the cheapest month to book a flight from Ontario to United Kingdom?

    Currently, November is the cheapest month in which you can book a flight from Ontario to United Kingdom (average of $661). Flying from Ontario to United Kingdom in June is currently the most expensive (average of $1,138). 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.

See more FAQs

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Alternative routes for Ontario to United Kingdom

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Ontario to United Kingdom

Discover the top 7 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 2,558,603 searches. Data last updated January 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest$455Average$889FlexibilityNo cancel feeOn-time72%
KLMCheapest$481Average$767FlexibilityNo cancel feeOn-time75%
DeltaCheapest$481Average$1,009FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$582Average$651FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$611Average$986FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$619Average$757FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$629Average$859FlexibilityNo cancel feeOn-time71%
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