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Cheap flights from Ontario to the United Kingdom from $246

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to the United Kingdom departing on 1/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ontario to the United Kingdom

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
4:45 pm - 4:30 pmONT-MAN
15h 45m2 stops
British Airways Logo
9:45 am - 10:13 pmMAN-ONT
20h 28m2 stops
$615British Airways
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Thu, Jan 22 - Thu, Feb 5
Air Canada Logo
5:05 am - 11:20 amONT-LHR
22h 15m2 stops
Air Canada Logo
2:30 pm - 10:53 pmLHR-ONT
40h 23m2 stops
$616Air Canada
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Fri, Jan 9 - Sun, Jan 18
United Airlines Logo
6:10 am - 7:55 amONT-EDI
17h 45m2 stops
United Airlines Logo
9:25 am - 8:58 pmEDI-ONT
19h 33m2 stops
$618United Airlines
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Fri, Feb 6 - Tue, Feb 10
American Airlines Logo
12:45 pm - 1:55 pmONT-MAN
17h 10m2 stops
American Airlines Logo
5:40 am - 6:45 pmMAN-ONT
21h 05m2 stops
$618American Airlines
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Wed, Dec 31 - Thu, Jan 15
Delta Logo
6:00 am - 6:20 amONT-LHR
16h 20m2 stops
Delta Logo
6:30 am - 10:51 pmLHR-ONT
24h 21m2 stops
$621Delta
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Wed, Jan 28 - Sun, Feb 1
Delta Logo
3:30 pm - 12:50 pmONT-LHR
13h 20m1 stop
Delta Logo
6:30 am - 9:05 pmLHR-ONT
22h 35m2 stops
$626Delta
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Tue, Jan 6 - Sun, Feb 8
United Airlines Logo
6:39 pm - 9:40 amONT-LHR
55h 01m2 stops
United Airlines Logo
8:30 am - 9:58 pmLHR-ONT
21h 28m2 stops
$627United Airlines
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Mon, Jan 5 - Tue, Jan 20
American Airlines Logo
10:59 am - 3:10 pmONT-GLA
20h 11m2 stops
American Airlines Logo
6:35 am - 8:15 pmGLA-ONT
20h 40m2 stops
$714American Airlines
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Thu, Mar 5 - Thu, Mar 19
Iberia Logo
10:58 am - 2:35 pmONT-LCY
19h 37m2 stops
Iberia Logo
7:50 am - 10:48 pmLCY-ONT
22h 58m2 stops
$915Iberia
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Mon, Jan 19 - Thu, Feb 5
Iberia Logo
7:16 am - 8:50 amONT-LCY
17h 34m2 stops
Iberia Logo
7:15 pm - 10:48 pmLCY-ONT
35h 33m2 stops
$926Iberia
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Sun, Jan 11 - Sun, Jan 25

Air Canada flights from Ontario to United Kingdom

Our best Air Canada deals on Ontario to United Kingdom flight tickets
Air Canada
Jan 9
ONT5:05 amOntario
22h 15m
2 stops
LHR11:20 amLondon Heathrow
Jan 18
LHR2:30 pmLondon Heathrow
40h 23m
2 stops
ONT10:53 pmOntario
$616
Find similar
Air Canada
Dec 29
ONT5:05 amOntario
41h 25m
2 stops
LHR6:30 amLondon Heathrow
Jan 11
LHR1:25 pmLondon Heathrow
39h 33m
2 stops
ONT8:58 pmOntario
$642
Find similar
Air Canada
Jan 20
ONT5:05 amOntario
18h 05m
2 stops
LHR7:10 amLondon Heathrow
Feb 2
LHR2:30 pmLondon Heathrow
16h 23m
2 stops
ONT10:53 pmOntario
$668
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Iberia flights from Ontario to United Kingdom

Our best Iberia deals on Ontario to United Kingdom flight tickets
Iberia
Jan 22
ONT10:58 amOntario
13h 37m
1 stop
LHR8:35 amLondon Heathrow
Jan 28
LHR3:00 pmLondon Heathrow
15h 48m
1 stop
ONT10:48 pmOntario
$654
Find similar
Iberia
Feb 26
ONT10:59 amOntario
13h 16m
1 stop
LHR8:15 amLondon Heathrow
Mar 5
LHR3:00 pmLondon Heathrow
15h 31m
1 stop
ONT10:31 pmOntario
$669
Find similar
Iberia
Mar 18
ONT10:57 amOntario
12h 53m
1 stop
LHR6:50 amLondon Heathrow
Mar 25
LHR3:00 pmLondon Heathrow
15h 43m
1 stop
ONT11:43 pmOntario
$682
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momondo Fare Finder

 
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, momondo users made 832,500 searches. Data last updated November 20, 2025.
Use the filters below to find and compare flights from Ontario to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioManchester

ONT - MAN

ONTMAN

Ontario

Thu 1/22

4:45 pm-4:30 pm

2 stops15h 45m

Manchester

Thu 2/5

9:45 am-10:13 pm

2 stops20h 28m

$615

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Fri 1/9

5:05 am-11:20 am

2 stops22h 15m

London Heathrow

Sun 1/18

2:30 pm-10:53 pm

2 stops40h 23m

$616

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Fri 2/6

6:10 am-7:55 am

2 stops17h 45m

Edinburgh Turnhouse

Tue 2/10

9:25 am-8:58 pm

2 stops19h 33m

$618

OntarioManchester

ONT - MAN

ONTMAN

Ontario

Wed 12/31

12:45 pm-1:55 pm

2 stops17h 10m

Manchester

Thu 1/15

5:40 am-6:45 pm

2 stops21h 05m

$618

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 1/28

6:00 am-6:20 am

2 stops16h 20m

London Heathrow

Sun 2/1

6:30 am-10:51 pm

2 stops24h 21m

$621

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Tue 1/6

3:30 pm-12:50 pm

1 stop13h 20m

London Heathrow

Sun 2/8

6:30 am-9:05 pm

2 stops22h 35m

$626

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Mon 1/5

6:39 pm-9:40 am

2 stops55h 01m

London Heathrow

Tue 1/20

8:30 am-9:58 pm

2 stops21h 28m

$627

OntarioGlasgow

ONT - GLA

ONTGLA

Ontario

Thu 3/5

10:59 am-3:10 pm

2 stops20h 11m

Glasgow Intl

Thu 3/19

6:35 am-8:15 pm

2 stops20h 40m

$714

OntarioLondon

ONT - LCY

ONTLCY

Ontario

Mon 1/19

10:58 am-2:35 pm

2 stops19h 37m

London City

Thu 2/5

7:50 am-10:48 pm

2 stops22h 58m

$915

OntarioLondon

ONT - LCY

ONTLCY

Ontario

Sun 1/11

7:16 am-8:50 am

2 stops17h 34m

London City

Sun 1/25

7:15 pm-10:48 pm

2 stops35h 33m

$926

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to the United Kingdom from

How to get the cheapest flight ticket from Ontario to United Kingdom

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to United Kingdom?

In general, October is the cheapest month to fly from Ontario to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $679. If you aren’t able to travel to United Kingdom during the month of October, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $684.

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from Ontario to United Kingdom is on a Wednesday when prices can be found for as low as $668. The most expensive day to fly to United Kingdom is Saturday, with ticket prices averaging around $1,112.

What is the cheapest time of day to depart on your flight to United Kingdom?

According to our data, the cheapest time of day to fly to United Kingdom is in the evening. momondo users have found flights departing from Ontario to United Kingdom in the evening for as low as $662. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to United Kingdom are more costly in the morning, with an average ticket price of $871. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to United Kingdom?

You are more likely to see cheaper flights to United Kingdom from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to United Kingdom for around $834 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United Kingdom from Ontario for as low as $606 on momondo.

Can stopping save me money on Ontario to United Kingdom flights?

You could potentially save up to 13% on your flight if you consider stops on a Ontario to United Kingdom flight.

Cheap Ontario to United Kingdom flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to United Kingdom

Direct flights

None
There are no direct flights from Ontario to United Kingdom. There are no popular flight routes from Ontario to United Kingdom.
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  • When did momondo last update prices for flights from Ontario Airport to United Kingdom?

    Prices for flights from Ontario Airport to United Kingdom were last updated today.

  • How many operators does momondo search for flights from Ontario Airport to United Kingdom?

  • How old do you have to be to fly from Ontario Airport to United Kingdom?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to United Kingdom.

  • What documentation or ID do you need to fly to United Kingdom?

    The travel and health documents required for your trip to United Kingdom can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to United Kingdom

Compare and see reviews for airlines that fly from Ontario to United Kingdom with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $543Free CancellationRating
7.9
8,002 reviews
Search Delta flights
KLMPriceFrom $580Free CancellationRating
7.7
1,414 reviews
Search KLM flights
IberiaPriceFrom $615Free CancellationRating
7.0
3,027 reviews
Search Iberia flights
American AirlinesPriceFrom $626Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
British AirwaysPriceFrom $660Free CancellationRating
6.7
7,533 reviews
Search British Airways flights
United AirlinesPriceFrom $675Free CancellationRating
7.4
9,028 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to United Kingdom?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to United Kingdom for you.

Can I find flights from Ontario to United Kingdom with flexible booking policies on momondo?

momondo does allow users to show only those flights to United Kingdom from Ontario which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Ontario to United Kingdom?

momondo provides multiple filters to help you find the best flight to United Kingdom from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to United Kingdom right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Ontario to United Kingdom now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to United Kingdom and let you know when they change.

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Find better results for your trip to the United Kingdom

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to Londonfrom $328
Flights to Manchesterfrom $372
Flights to Edinburghfrom $385
Flights to Glasgowfrom $394
Flights to Birminghamfrom $390
Flights to Newcastle upon Tynefrom $424
Flights to Belfastfrom $510
Flights to Bristolfrom $427
Flights to Invernessfrom $425
Flights to Liverpoolfrom $416
Flights to Aberdeenfrom $516
Flights to Leedsfrom $425