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£294+ Cheap flights to Ontario

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 23/1. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
17 Jan — 24 Jan1
1 adult
1 adult, Economy, 0 bags

Flights to Ontario in 2025

Enter your travel dates to find the best prices.

Cheapest flights to Ontario
Explore the most affordable flight options available to Ontario. Find the lowest fares based on data from user searches, with prices last updated on 18 December 2025.

Thu 25/1211:55LHR - ONT
1 stop18h 19mIberia
Mon 12/110:58ONT - LHR
1 stop35h 52mIberia
Deal found 17/12£437
Fri 26/1209:55LHR - ONT
1 stop19h 03mBritish Airways
Sun 11/123:59ONT - LHR
1 stop22h 51mBritish Airways
Deal found 17/12£495
Wed 24/1210:45LHR - ONT
1 stop19h 48mVirgin Atlantic
Sat 31/112:41ONT - LHR
1 stop14h 59mVirgin Atlantic
Deal found 15/12£507
Thu 25/1212:20LHR - ONT
2 stops18h 13mVirgin Atlantic
Mon 12/113:11ONT - LHR
2 stops35h 34mVirgin Atlantic
Deal found 17/12£509
Thu 25/1211:15LHR - ONT
2 stops30h 23mMultiple Airlines
Mon 12/116:45ONT - LHR
1 stop12h 30mMultiple Airlines
Deal found 17/12£513
Thu 25/1210:05LHR - ONT
1 stop16h 13mBritish Airways
Wed 31/1212:45ONT - LHR
1 stop13h 15mBritish Airways
Deal found 17/12£523
Thu 25/1215:00LHR - ONT
1 stop15h 14mAmerican Airlines
Mon 12/116:45ONT - LHR
1 stop12h 30mAmerican Airlines
Deal found 17/12£526
Wed 24/1216:30LHR - ONT
1 stop29h 22mBritish Airways
Wed 31/1207:10ONT - LHR
1 stop15h 40mBritish Airways
Deal found 17/12£528
Wed 24/1210:45LHR - ONT
1 stop33h 44mDelta
Wed 7/122:30ONT - LHR
1 stop25h 20mDelta
Deal found 15/12£529
Tue 16/1214:45LHR - ONT
1 stop16h 02mVirgin Atlantic
Mon 22/1206:00ONT - LHR
1 stop20h 00mVirgin Atlantic
Deal found 15/12£539
Thu 25/1206:30LHR - ONT
2 stops21h 20mDelta
Wed 31/1207:05ONT - LHR
1 stop15h 20mDelta
Deal found 17/12£549
Sat 27/1210:45LHR - ONT
1 stop19h 43mVirgin Atlantic
Mon 12/106:00ONT - LHR
1 stop20h 00mVirgin Atlantic
Deal found 17/12£550

Find flight deals to Ontario

Find the latest flights to Ontario in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 18 December 2025.

Return from

£442

One-way from

£294

Popular in

December

Cheapest in

September

Average price

£591
British Airways
  • British Airways
  • 19/1-2/2
  • 2 total stops
  • 34h 00m total
  • London to Los Angeles
Search Deals
23/1
  • 23/1
  • 2 total stops
  • 41h 24m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£24 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for return flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Locate flights to Ontario that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 858,174 searches and data was last updated on 18 December 2025.
Use the filters below to find and compare flights to Ontario that are best for you.

Fly from

London

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 7/2

10:35-18:45

1 stop16h 10m

Ontario

Sat 14/2

15:19-12:15

1 stop12h 56m

£478

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 20/2

06:30-22:37

2 stops24h 07m

Ontario

Sun 22/2

07:30-10:30

1 stop19h 00m

£490

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 14/1

10:05-17:43

1 stop15h 38m

Ontario

Wed 4/2

13:24-09:40

1 stop12h 16m

£499

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 20/1

13:45-22:53

1 stop17h 08m

Ontario

Wed 23/9

13:00-09:40

1 stop12h 40m

£499

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 27/1

15:00-22:48

1 stop15h 48m

Ontario

Thu 12/2

17:06-13:15

1 stop12h 09m

£499

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 20/1

11:35-20:58

1 stop17h 23m

Ontario

Tue 6/10

13:33-11:10

1 stop13h 37m

£499

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 13/1

13:45-22:53

1 stop17h 08m

Ontario

Tue 3/2

13:53-12:00

1 stop14h 07m

£499

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 18/3

13:45-22:57

1 stop16h 12m

Ontario

Mon 23/3

13:50-09:40

1 stop12h 50m

£499

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 2/2

10:05-17:43

1 stop15h 38m

Ontario

Mon 16/2

13:50-12:00

1 stop14h 10m

£499

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 20/1

13:45-22:53

1 stop17h 08m

Ontario

Wed 7/10

13:00-09:40

1 stop12h 40m

£499

Flights are sorted by cheapest return flights first.

Deals found on 17/12

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

Have a flexible travel schedule? Discover the best time to fly to Ontario with our price prediction graph.
Estimated return 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.

Cheapflights Insights

Everything you need to know about your flight to Ontario

When is the best time to book a flight to Ontario?

Use this chart to determine the optimal time to book a return flight from London to Ontario. Price data was last updated on 12 December 2025.

The price you pay for your flight to Ontario may vary depending on when you book. For the best chance of a lower fare, look to book 81 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

How long is the flight to Ontario?

On average, a flight from London to Ontario takes 17 hours 52 minutes. Flights to Ontario from other popular cities in United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

What are the most popular airlines that fly to Ontario?

The most popular airlines flying from London to Ontario are British Airways, Virgin Atlantic and Lufthansa.

British Airways
British Airways
From £370
Virgin Atlantic
Virgin Atlantic
From £361
Lufthansa
Lufthansa
From £390
KLM
KLM
From £370

What are the cheapest airlines that fly to Ontario?

The cheapest airlines flying from London to Ontario are Finnair, Virgin Atlantic and British Airways.

Rainfall in Ontario by month

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

In terms of precipitation, rainfall in Ontario ranges from 3.0 - 86.0 inches per month. February is typically the wettest month, when rainfall can reach 86.0 mm. June is typically the driest time to visit Ontario when rainfall is around 3.0 mm.

Temperature in Ontario by month

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

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 26.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 12.0 C).

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated 18 December 2025.
Get a feel of what it's like to fly with Finnair, Virgin Atlantic, andUnited Airlines to the United States by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,338 reviews
Check prices

Crew

8.1

Boarding

7.6

Food

6.7

Overall

7.6

Entertainment

6.9

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,338 reviews
Finnair
7.6
Good
1,338 reviews
Check prices

Crew

8.1

Boarding

7.6

Food

6.7

Overall

7.6

Entertainment

6.9

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Virgin Atlantic
7.5
Good
675 reviews
Finnair
7.6
Good
1,338 reviews
Check prices

Crew

8.1

Boarding

7.6

Food

6.7

Overall

7.6

Entertainment

6.9

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
United Airlines
7.4
Good
9,093 reviews
Finnair
7.6
Good
1,338 reviews
Check prices

Crew

8.1

Boarding

7.6

Food

6.7

Overall

7.6

Entertainment

6.9

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Lufthansa
6.8
Okay
7,635 reviews
Finnair
7.6
Good
1,338 reviews
Check prices

Crew

8.1

Boarding

7.6

Food

6.7

Overall

7.6

Entertainment

6.9

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,585 reviews
Finnair
7.6
Good
1,338 reviews
Check prices

Crew

8.1

Boarding

7.6

Food

6.7

Overall

7.6

Entertainment

6.9

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

FAQs about flying to Ontario

Ontario airport overview

At just 3.7km (2.3 miles) east of downtown Ontario, Ontario International Airport  is a small but well-equipped alternative to Los Angeles Airport and John Wayne Airport for passengers flying to California.

The number of flights to Ontario International Airport has been declining steadily in recent years (there were 4.8 million passengers in 2010, but the terminals are built to handle twice that) – some say due to the lack of direct flights to major destinations, in comparison with other airports nearby. However, those who use the airport agree that it is a convenient alternative, well connected to nearby air fields and towns, easy to get in and out of, clean and with good basic facilities.

  • What airport do you fly into for flights to Ontario?

    If you book a flight to Ontario, you will be flying into Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • Can I find cheaper flights to Ontario if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Ontario on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Ontario?

    Based on reviews from Cheapflights users, Finnair is rated the highest out of the airlines that fly to Ontario.

  • Where does the fastest flight to Ontario depart from?

    For those looking to save time traveling to Ontario, London offers the quickest one-way flight (13 hours 27 minutes).

  • Does Ontario have car hire?

    Yes. Those touching down at Ontario can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Ontario?

    Yes. Ontario has hotels nearby for those requiring accommodations. Delta Hotels by Marriott Ontario Airport is the closest property to Ontario (0.0 mi away from Ontario).

See more FAQs

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How does Cheapflights help users find flights to Ontario?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights to Ontario. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Ontario.

Can Cheapflights find flights to Ontario with no change fees?

Yes, we can. To see specific flights to Ontario 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 to Ontario become cheaper?

Yes, Cheapflights offers price alerts on Ontario flights so you can book your flight when prices are ideal. Enable price alerts 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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