Which airlines fly to Ontario?

There may be other airlines that fly to Ontario from United Kingdom, but the most popular among our users are British Airways, Virgin Atlantic, Lufthansa and KLM. These airlines should offer flights to Ontario on a routine basis if you’re flying from one of the more popular airports in United Kingdom.

KLM Flights to Ontario

KLM is a popular choice for users travelling to Ontario. It operates 14 flights every week to Ontario, most often flying from Seattle/Tacoma Intl. KLM ticket prices will depend on when and where you need to fly from - deals as low as £390 (from London Heathrow) have been found by momondo users. In 1,385 reviews, momondo users have rated KLM at an average score of 7.8/10.

United Airlines Flights to Ontario

United Airlines flights to Ontario can start from as low as £381 (round-trip, from London Heathrow, found in the last 72 hours). Over 18 flights that United Airlines operates to Ontario in a normal week, prices can vary significantly. The most popular United Airlines flight to Ontario is from Denver Intl. United Airlines has been rated 7.4/10 by momondo users, in 8,929 reviews.

How long does it take to fly to Ontario?

On average, it takes 11h 15m to fly from United Kingdom to Ontario if you fly out of London Heathrow (the most popular airport in United Kingdom) and into Los Angeles (the most popular airport in Ontario). If you’re flying out of Manchester and into Los Angeles, then the flight time is around 14h 10m.

£247 Cheap Flights to Ontario in 2025/26

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Find the cheapest flights from the United Kingdom to Ontario

Round-trip

One-way

Last minute

Cheap return flights

12:30 - 20:24LGW-ONT

39h 54m2 stops

06:47 - 09:00ONT-LGW

18h 13m2 stops

£361American Airlines

Find Deal

Thu, 26 Feb - Mon, 2 Mar

12:30 - 09:31LGW-ONT

29h 01m2 stops

20:04 - 07:30ONT-LGW

27h 26m2 stops

£361American Airlines

Find Deal

Thu, 26 Feb - Mon, 2 Mar

20:25 - 22:41LHR-ONT

33h 16m2 stops

07:05 - 09:00ONT-LHR

17h 55m1 stop

£363Virgin Atlantic

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Wed, 29 Oct - Wed, 5 Nov

12:20 - 22:41LHR-ONT

17h 21m1 stop

07:05 - 07:50ONT-LHR

16h 45m1 stop

£376Virgin Atlantic

Find Deal

Wed, 29 Oct - Wed, 5 Nov

15:00 - 22:02LHR-ONT

15h 02m1 stop

17:03 - 13:15ONT-LHR

12h 12m1 stop

£378British Airways

Find Deal

Sat, 7 Feb - Sat, 21 Feb

10:05 - 22:18LHR-ONT

19h 13m1 stop

14:59 - 11:40ONT-LHR

12h 41m1 stop

£391British Airways

Find Deal

Thu, 30 Oct - Thu, 6 Nov

12:35 - 22:23MAN-ONT

17h 48m1 stop

13:15 - 20:05ONT-MAN

22h 50m2 stops

£515KLM

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Sun, 28 Sep - Sun, 12 Oct

12:35 - 22:23MAN-ONT

17h 48m1 stop

06:00 - 16:45ONT-MAN

26h 45m2 stops

£516KLM

Find Deal

Fri, 26 Sep - Thu, 23 Oct

06:00 - 22:51MAN-ONT

23h 51m2 stops

07:00 - 08:40ONT-MAN

17h 40m2 stops

£590United Airlines

Find Deal

Wed, 29 Oct - Wed, 5 Nov

09:25 - 22:53MAN-ONT

21h 28m2 stops

07:00 - 08:45ONT-MAN

17h 45m2 stops

£606United Airlines

Find Deal

Tue, 13 Jan - Mon, 19 Jan

Fly from

Route

Depart

Return

Price

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Thu 26/2

12:30-20:24

2 stops39h 54m

Ontario

Mon 2/3

06:47-09:00

2 stops18h 13m

£361

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Thu 26/2

12:30-09:31

2 stops29h 01m

Ontario

Mon 2/3

20:04-07:30

2 stops27h 26m

£361

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 29/10

20:25-22:41

2 stops33h 16m

Ontario

Wed 5/11

07:05-09:00

1 stop17h 55m

£363

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 29/10

12:20-22:41

1 stop17h 21m

Ontario

Wed 5/11

07:05-07:50

1 stop16h 45m

£376

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 7/2

15:00-22:02

1 stop15h 02m

Ontario

Sat 21/2

17:03-13:15

1 stop12h 12m

£378

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 30/10

10:05-22:18

1 stop19h 13m

Ontario

Thu 6/11

14:59-11:40

1 stop12h 41m

£391

ManchesterOntario

MAN - ONT

MANONT

Manchester

Sun 28/9

12:35-22:23

1 stop17h 48m

Ontario

Sun 12/10

13:15-20:05

2 stops22h 50m

£515

ManchesterOntario

MAN - ONT

MANONT

Manchester

Fri 26/9

12:35-22:23

1 stop17h 48m

Ontario

Thu 23/10

06:00-16:45

2 stops26h 45m

£516

ManchesterOntario

MAN - ONT

MANONT

Manchester

Wed 29/10

06:00-22:51

2 stops23h 51m

Ontario

Wed 5/11

07:00-08:40

2 stops17h 40m

£590

ManchesterOntario

MAN - ONT

MANONT

Manchester

Tue 13/1

09:25-22:53

2 stops21h 28m

Ontario

Mon 19/1

07:00-08:45

2 stops17h 45m

£606

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

Ontario flights insights and trends

Explore insights for your Ontario flight to craft the best travel plan

Prices

Other information

What is the cheapest month to fly to Ontario?

The month of February is, on average, the cheapest month to fly to Ontario from United Kingdom, with most prices found around £402. If you’re not able to fly to Ontario in February, then January is your next best option. Flight prices from United Kingdom to Ontario during January average around £410.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as £484. This is often the case because there is less demand to fly during this day of the week. Flights from United Kingdom to Ontario on a Sunday will generally be more expensive and average around £559. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Flying to Ontario from United Kingdom in the evening is the least expensive time of day to depart. momondo users have found prices as low as £473 when looking at flights departing in the evening. In contrast, the most expensive time of day to depart to Ontario is at midday when prices are around £556.

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around £528 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from United Kingdom for as low as £429 on momondo.

Cheapest flights to Ontario

Find the cheapest flights to Ontario from your nearest city or airport

Find flights from London Heathrow Airport to Ontario

CHEAPEST MONTH TO FLY TO ONTARIO FROM LONDON HEATHROW AIRPORT	September	21% cheaper	Flying from London Heathrow Airport to Ontario costs on average just £422 in September
MOST EXPENSIVE MONTH TO FLY TO ONTARIO FROM LONDON HEATHROW AIRPORT	December	30% more expensive	It costs about £691 for flights to Ontario from London Heathrow Airport in December
MOST POPULAR MONTH TO FLY TO ONTARIO FROM LONDON HEATHROW AIRPORT	November	631% more users visited	More momondo users searched in flights to Ontario from London Heathrow Airport in November than any other month

Cheap Ontario flight deals and tips

Summary info about Ontario flight prices, duration and airlines

Best One-Way Price	£247
Best Round-Trip Price	£361
Fastest flight time	15h 29m
Popular in	August

The best one-way flight price to Ontario from United Kingdom in the last 72 hours is £247 (London Heathrow to Ontario).

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The best round-trip flight price to Ontario from United Kingdom in the last 72 hours is £361 (London Gatwick to Ontario).

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The fastest flight to Ontario from United Kingdom takes 15h 29m (London Heathrow to Ontario).

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August has the highest demand for flights to Ontario, with a 19% price increase on average.

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Frequently asked questions about flying to Ontario

How far in advance should I book a flight to Ontario?

Most flyers found that booking tickets 81 days in advance of their planned departure date is the best time to get cheap flights to Ontario. During this timeframe, flight prices are around £538. However, in the past 72 hours, people saw flights from United Kingdom for as low as £381.

Is there an alternative airport near Ontario?

Ontario Airport, San Bernardino Int Airport, Santa Ana J. Wayne/Orange Cnty Airport, Long Beach Municipal Airport or Burbank Bob Hope Airport can be an alternative airport used for travel to Ontario.

Is there a cheaper alternative to flying into Ontario?

The cheapest airport near Ontario is typically Santa Ana J. Wayne/Orange Cnty Airport, with an average price of £198/person. These prices vary based on where travellers are coming from. It is suggested that travellers looking to save money try momondo’s Airport-to-Airport Pricing Tool.

What is the absolute cheapest flight to Ontario?

The best deal found on momondo in the last two weeks was a flight to Ontario from Phoenix for £29. This is 90% cheaper than most flight deals to Ontario. To find the cheapest price to Ontario from your area, use momondo’s Airport-to-Airport Pricing Tool.

When did momondo last update prices for flights to Ontario Airport?

Prices for flights to Ontario Airport are updated daily.

How many operators does momondo search for flights to Ontario Airport?

The number of operators available for flights to Ontario Airport is 6 as of September 2025.

How old do you have to be to fly to Ontario Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario.

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

Yes. momondo allows you to filter the results for flights to Ontario to just show those with flexible booking policies.

How can momondo help me find flights to Ontario?

momondo helps you find the best flight to Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select fights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario and alert you when they change.

An easier way to manage your Ontario trip

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£247 Cheap flights to Ontario

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Ontario departing on 31/10. 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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Filter for what you want

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Price Alerts

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Find the cheapest flights from the United Kingdom to Ontario

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Use the filters below to find and compare flights to Ontario that are best for you.

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Ontario flights insights and trends

Explore insights for your Ontario flight to craft the best travel plan

What is the cheapest month to fly to Ontario?

What is the cheapest day to depart on your flight to Ontario?

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

How far in advance should I book a flight to Ontario?

How long does it take to fly to Ontario?

Cheapest flights to Ontario

Find the cheapest flights to Ontario from your nearest city or airport

Cheap Ontario flight deals and tips

Summary info about Ontario flight prices, duration and airlines

Best One-Way Price

Best Round-Trip Price

Fastest flight time

Popular in

Frequently asked questions about flying to Ontario

How far in advance should I book a flight to Ontario?

Is there an alternative airport near Ontario?

Is there a cheaper alternative to flying into Ontario?

What is the absolute cheapest flight to Ontario?

When did momondo last update prices for flights to Ontario Airport?

How many operators does momondo search for flights to Ontario Airport?

How old do you have to be to fly to Ontario Airport?

What documentation or ID do you need to fly to Ontario Airport?

Why use momondo?

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

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

How can momondo help me find flights to Ontario?

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

An easier way to manage your Ontario trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Ontario

Popular Flights to Ontario

Popular routes according to searches in the past day on momondo