HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Ontario (ONT) to the United Kingdom from $341

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 7/29. 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. 18 — may. 251
From?
To?
sáb. 5/18
sáb. 5/25
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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 15 days in advance, which can save you up to 31% on flights from Ontario to United Kingdom compared to booking the week you need them. Waiting 15 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 $758. For sooner than that we have options available in the next 3 days from $1,025.

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 $715 on average during October, but can be found for as low as $429.

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 Iberia flights from Ontario to United Kingdom

Explore cheap flight options specifically provided by Iberia 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 2,633,403 searches. Data last updated mayo 13, 2024.
Find some of the cheapest Iberia flights traveling from Ontario to United Kingdom. Make sure to double check the flight details before booking.
dom. 9/2212:45 pmONT - LHR
1 stop17h 40mIberia
mar. 10/19:15 amLHR - ONT
2 stops22h 11mIberia
Deal found 5/12$611
mié. 10/910:50 amONT - LHR
1 stop13h 10mIberia
mié. 10/234:25 pmLHR - ONT
1 stop15h 01mIberia
Deal found 5/13$632
dom. 9/2210:50 amONT - LHR
1 stop13h 10mIberia
mié. 10/29:15 amLHR - ONT
2 stops22h 11mIberia
Deal found 5/12$646
mar. 10/110:50 amONT - LHR
1 stop13h 10mIberia
mar. 10/84:25 pmLHR - ONT
1 stop15h 01mIberia
Deal found 5/13$663
jue. 9/192:52 pmONT - LHR
1 stop15h 33mIberia
mar. 10/19:15 amLHR - ONT
2 stops22h 11mIberia
Deal found 5/12$696
lun. 9/210:46 amONT - LHR
1 stop13h 14mIberia
jue. 9/124:25 pmLHR - ONT
1 stop15h 01mIberia
Deal found 5/12$701
mié. 9/1810:50 amONT - LHR
1 stop17h 55mIberia
mié. 10/29:15 amLHR - ONT
2 stops22h 11mIberia
Deal found 5/12$719
jue. 9/192:52 pmONT - LHR
1 stop15h 33mIberia
mié. 10/29:15 amLHR - ONT
2 stops22h 11mIberia
Deal found 5/12$731
mar. 7/3010:48 amONT - LHR
1 stop13h 12mIberia
jue. 8/2212:00 pmLHR - ONT
1 stop14h 48mIberia
Deal found 5/12$773

Cheap Delta flights from Ontario to United Kingdom

Explore cheap flight options specifically provided by Delta 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 2,633,403 searches. Data last updated mayo 13, 2024.
Have a look at some of the cheapest available Delta 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.
mar. 10/292:00 pmONT - LHR
1 stop14h 40mDelta
vie. 11/86:20 amLHR - ONT
2 stops21h 02mDelta
Deal found 5/13$622
mar. 10/291:42 pmONT - LHR
2 stops16h 48mDelta
vie. 11/86:20 amLHR - ONT
2 stops19h 43mDelta
Deal found 5/13$626
jue. 9/197:00 amONT - LGW
2 stops19h 00mDelta
lun. 9/3012:00 pmLGW - ONT
2 stops18h 28mDelta
Deal found 5/13$697
vie. 11/111:30 amONT - LHR
1 stop13h 15mDelta
sáb. 11/96:20 amLHR - ONT
2 stops19h 43mDelta
Deal found 5/13$722
vie. 11/111:30 amONT - LHR
2 stops19h 00mDelta
sáb. 11/96:20 amLHR - ONT
2 stops17h 52mDelta
Deal found 5/13$726
sáb. 5/181:20 pmONT - LHR
1 stop12h 40mDelta
mié. 5/2211:00 amLHR - ONT
1 stop13h 36mDelta
Deal found 5/12$1,046

Cheap Ontario to United Kingdom flights in May & June 2024

Find cheap flight options from Ontario to United Kingdom specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,633,403 searches. Prices were last updated on mayo 13, 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.
lun. 5/136:00 amONT - LHR
1 stop16h 55mUnited Airlines
mar. 5/284:15 pmLHR - ONT
1 stop14h 14mUnited Airlines
Deal found 5/13$766
mar. 5/141:36 pmONT - LHR
1 stop12h 04mUnited Airlines
mar. 5/281:40 pmLHR - ONT
1 stop15h 34mUnited Airlines
Deal found 5/12$773
mié. 5/151:20 pmONT - LHR
1 stop12h 40mKLM
mar. 6/410:55 amLHR - ONT
1 stop13h 41mKLM
Deal found 5/12$793
lun. 5/136:00 amONT - LHR
1 stop16h 55mUnited Airlines
lun. 5/2711:05 amLHR - ONT
1 stop14h 23mUnited Airlines
Deal found 5/12$816
vie. 5/171:36 pmONT - LHR
1 stop14h 44mUnited Airlines
vie. 5/3111:05 amLHR - ONT
1 stop14h 23mUnited Airlines
Deal found 5/13$817
dom. 5/1910:34 amONT - LHR
1 stop13h 31mIberia
lun. 5/274:25 pmLHR - ONT
1 stop15h 31mIberia
Deal found 5/13$823
vie. 5/171:20 pmONT - LHR
1 stop12h 40mKLM
vie. 5/3112:45 pmLHR - ONT
1 stop15h 21mKLM
Deal found 5/12$824
dom. 5/191:36 pmONT - LHR
1 stop12h 04mUnited Airlines
vie. 10/251:40 pmLHR - ONT
1 stop15h 41mUnited Airlines
Deal found 5/12$829
lun. 5/131:36 pmONT - LHR
1 stop14h 44mUnited Airlines
mié. 5/224:15 pmLHR - ONT
1 stop14h 49mUnited Airlines
Deal found 5/11$836

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 2,633,403 searches. Data last updated mayo 13, 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.
dom. 9/2212:45 pmONT - LHR
1 stop17h 40mIberia
mar. 10/19:15 amLHR - ONT
2 stops22h 11mIberia
Deal found 5/12$611
mar. 10/292:00 pmONT - LHR
1 stop14h 40mDelta
vie. 11/86:20 amLHR - ONT
2 stops21h 02mDelta
Deal found 5/13$622
dom. 12/111:30 amONT - LHR
1 stop16h 10mVirgin Atlantic
lun. 12/98:25 pmLHR - ONT
2 stops27h 47mVirgin Atlantic
Deal found 5/13$624
mar. 10/291:42 pmONT - LHR
2 stops16h 48mDelta
vie. 11/86:20 amLHR - ONT
2 stops19h 43mDelta
Deal found 5/13$626
mar. 10/296:48 amONT - LHR
1 stop22h 22mAmerican Airlines
vie. 11/811:50 amLHR - ONT
1 stop16h 23mAmerican Airlines
Deal found 5/12$627
mié. 10/1612:40 pmONT - LHR
1 stop14h 25mBritish Airways
mié. 10/3010:40 amLHR - ONT
1 stop20h 27mBritish Airways
Deal found 5/13$628
mié. 10/910:50 amONT - LHR
1 stop13h 10mIberia
mié. 10/234:25 pmLHR - ONT
1 stop15h 01mIberia
Deal found 5/13$632
dom. 10/137:18 amONT - LHR
2 stops18h 42mMultiple Airlines
mar. 10/296:00 pmLHR - ONT
2 stops25h 38mMultiple Airlines
Deal found 5/13$634
lun. 10/145:15 amONT - LHR
2 stops17h 20mMultiple Airlines
vie. 11/16:00 pmLHR - ONT
2 stops25h 38mMultiple Airlines
Deal found 5/13$640

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 2,633,403 searches. Data last updated mayo 13, 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.
dom. 5/191:36 pmONT - LHR
1 stop12h 04mUnited Airlines
jue. 5/301:40 pmLHR - ONT
1 stop15h 34mUnited Airlines
Deal found 5/12$766
mar. 5/141:36 pmONT - LHR
1 stop12h 04mUnited Airlines
mar. 5/281:40 pmLHR - ONT
1 stop15h 34mUnited Airlines
Deal found 5/12$773
mié. 5/151:20 pmONT - LHR
1 stop12h 40mKLM
mar. 6/410:55 amLHR - ONT
1 stop13h 41mKLM
Deal found 5/12$793
vie. 5/171:36 pmONT - LHR
1 stop14h 44mUnited Airlines
vie. 5/314:15 pmLHR - ONT
1 stop14h 14mUnited Airlines
Deal found 5/13$816
vie. 5/171:36 pmONT - LHR
1 stop14h 44mUnited Airlines
vie. 5/3111:05 amLHR - ONT
1 stop14h 23mUnited Airlines
Deal found 5/13$817
dom. 5/1910:34 amONT - LHR
1 stop13h 31mIberia
dom. 5/264:25 pmLHR - ONT
1 stop15h 31mIberia
Deal found 5/12$823
vie. 5/171:20 pmONT - LHR
1 stop12h 40mKLM
vie. 5/3112:45 pmLHR - ONT
1 stop15h 21mKLM
Deal found 5/12$824
dom. 5/191:36 pmONT - LHR
1 stop12h 04mUnited Airlines
vie. 10/251:40 pmLHR - ONT
1 stop15h 41mUnited Airlines
Deal found 5/12$829
mar. 5/141:36 pmONT - LHR
1 stop12h 04mUnited Airlines
mar. 5/214:15 pmLHR - ONT
1 stop14h 49mUnited Airlines
Deal found 5/13$836

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 2,633,403 searches. Data last updated mayo 13, 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.
lun. 7/2912:49 amONT - LGW
3 stops48h 01mMultiple Airlines
Deal found 5/11$341
lun. 10/2812:49 amONT - LHR
2 stops27h 06mMultiple Airlines
Deal found 5/13$343
lun. 10/2812:49 amONT - LGW
2 stops27h 06mMultiple Airlines
Deal found 5/13$343
mar. 10/2912:00 pmONT - LGW
1 stop15h 35mMultiple Airlines
Deal found 5/13$346
jue. 9/191:10 pmONT - LGW
1 stop13h 25mMultiple Airlines
Deal found 5/13$351
dom. 7/2811:22 pmONT - LGW
3 stops37h 08mMultiple Airlines
Deal found 5/11$373
lun. 7/2912:49 amONT - LHR
3 stops32h 31mMultiple Airlines
Deal found 5/11$382
lun. 7/2912:49 amONT - LCY
3 stops32h 41mMultiple Airlines
Deal found 5/11$410
vie. 7/2612:49 amONT - EDI
3 stops35h 01mMultiple Airlines
Deal found 5/13$414

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 2,633,403 searches. Data last updated mayo 13, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$611 - $741

Route

Depart

Return

Price

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

dom. 9/22

1 stop17h 40m

London Heathrow

mar. 10/1

2 stops22h 11m

$611

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

mar. 10/29

1 stop14h 40m

London Heathrow

vie. 11/8

2 stops21h 02m

$622

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

mar. 10/29

1 stop22h 22m

London Heathrow

vie. 11/8

1 stop16h 23m

$627

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

mié. 10/16

1 stop14h 25m

London Heathrow

mié. 10/30

1 stop20h 27m

$628

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

dom. 10/13

2 stops18h 42m

London Heathrow

mar. 10/29

2 stops25h 38m

$634

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

mié. 9/18

1 stop14h 45m

London Heathrow

mié. 9/25

1 stop14h 17m

$660

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

mar. 9/17

2 stops19h 15m

London Heathrow

jue. 9/26

2 stops18h 31m

$706

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

dom. 9/8

2 stops28h 10m

London Heathrow

mar. 9/17

2 stops32h 27m

$714

OntarioLondon Heathrow

ONT - LHR

ONTLHR

Ontario

mié. 8/21

1 stop12h 18m

London Heathrow

jue. 8/29

1 stop13h 12m

$741

Flights are sorted by cheapest first

Deals found on 5/12

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 mayo 13, 2024.
Get a feel of what it's like to fly with Iberia, Delta 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
8.0
Very good
10,736 reviews
Check prices

Overall

8.0

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.4

Reviews

1 / 10

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

Delta
8.0
Very good
10,736 reviews
Delta
8.0
Very good
10,736 reviews
Check prices

Overall

8.0

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.4

Reviews

1 / 10

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

KLM
7.9
Good
1,574 reviews
Delta
8.0
Very good
10,736 reviews
Check prices

Overall

8.0

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.4

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
738 reviews
Delta
8.0
Very good
10,736 reviews
Check prices

Overall

8.0

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.4

Reviews

1 / 10

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

JetBlue
7.6
Good
4,497 reviews
Delta
8.0
Very good
10,736 reviews
Check prices

Overall

8.0

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.4

Reviews

1 / 10

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

Avianca
7.5
Good
3,782 reviews
Delta
8.0
Very good
10,736 reviews
Check prices

Overall

8.0

Entertainment

8.0

Boarding

8.2

Comfort

7.9

Crew

8.6

Food

7.4

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 Iberia for just $611, but on average you can expect to pay $654.

  • Are there last-minute flights available from Ontario to United Kingdom for under $800?

    There are currently 20+ open flights from Ontario to United Kingdom within the next 7 days for less than $800.

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

    The cheapest airline one-way is KLM, with whom users have recently found tickets for as low as $457. However, be on the lookout for offers from United Airlines and JetBlue, 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 - London Gatwick 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 5/13.

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 United Kingdom
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 Charles de Gaulle flights
San Francisco to Charles de Gaulle flights
San Francisco to Leonardo da Vinci/Fiumicino flights
Los Angeles to Istanbul flights
Los Angeles to London City flights
Los Angeles to Leonardo da Vinci/Fiumicino flights
Los Angeles to Madrid flights
Los Angeles to Barcelona-El Prat flights
San Francisco to London City flights
Los Angeles to Frankfurt flights
Los Angeles to Orly flights
San Francisco to Gatwick flights
San Francisco to Barcelona-El Prat flights
Los Angeles to Gatwick flights
San Francisco to Istanbul flights
San Diego to Heathrow flights
Los Angeles to Athens flights
San Francisco to Lisbon flights
San Francisco to Frankfurt flights
San Francisco to Amsterdam flights
Los Angeles to Amsterdam flights
Los Angeles to Zurich flights
Los Angeles to Dublin flights
San Francisco to Dublin flights
San Francisco to Madrid flights
San Francisco to Zurich flights
San Francisco to Athens flights
Los Angeles to Lisbon flights
Ontario to Heathrow flights
San Francisco to Orly flights
Los Angeles to Munich flights
Ontario to Charles de Gaulle flights
Los Angeles to Luton flights
San Francisco to Copenhagen flights
San Francisco to Munich flights
Los Angeles to Sabiha Gokcen flights
Los Angeles to Copenhagen flights
Las Vegas to Heathrow flights
Los Angeles to Frederic Chopin flights
Ontario to Leonardo da Vinci/Fiumicino flights
San Francisco to Malpensa flights
Los Angeles to Malpensa flights
Burbank to Heathrow flights
San Diego to Gatwick flights
San Francisco to Linate flights
San Francisco to Vicenza flights
Los Angeles to Linate flights
San Francisco to Sabiha Gokcen flights

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 2,633,403 searches. Data last updated mayo 13, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$482Average$954FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Virgin AtlanticCheapest$591Average$667FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest$597Average$986FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest$598Average$912FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$620Average$671FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IberiaCheapest$642Average$805FlexibilityNo cancel feeOn-time77%
Search Iberia flights
New York to Denver flights
Austin to Seattle flights
New Orleans to Dallas flights
Chicago to Houston flights
Seattle to Dallas flights
Dallas to Paris flights
Boston to Puerto Rico flights
Hawaii to Japan flights
Boston to Los Angeles flights
Ohio to Florida flights
Los Angeles to Philadelphia flights
Ontario to Gaborone flights

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
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 Ordu/Giresun
Flights to Hakodate
Flights to Gazipasa
Flights to Kirkwall Arpt
Flights to Skiathos
Flights to Bourgas
Flights to Kalamata
Flights to Menorca/Mahon
Flights to Mytilene
Flights to Mason City
Flights to Pau Pyrénées
Flights to Neiva La Marguita
Flights to Cortez Montezuma County
Flights to Biarritz Parme
Flights to Parikia Paros
Flights to Ohrid
Flights to Edremit/Korfez
Flights to Naxos
Flights to Dalaman
Flights to Lublin
Flights to Miyakojima Hirara
Flights to Champaign University-Willard
Flights to Kagoshima
Flights to Constanţa Mihail Kogalniceanu

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.

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