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£246+ 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 31/10. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Flights to Ontario in 2025

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 September 2025.

Return from

£349

One-way from

£246

Popular in

December

Cheapest in

September

Average price

£399
Virgin Atlantic
  • Virgin Atlantic
  • 6/10-15/10
  • 1 total stop
  • 33h 25m total
  • London to Los Angeles
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Iberia
  • Iberia
  • 31/10
  • 1 total stop
  • 24h 23m total
  • London to Ontario
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Highest demand for flights based on searches. 3% potential increase in price (£12 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
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Average for return flights in September 2025
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Find flight deals to Ontario

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 September 2025.

Thu 30/1014:45LHR - ONT
1 stop14h 56mVirgin Atlantic
Thu 6/1107:35ONT - LHR
1 stop21h 15mVirgin Atlantic
Deal found 15/9£375
Sat 1/1112:20LHR - ONT
1 stop17h 21mVirgin Atlantic
Sat 8/1107:05ONT - LHR
1 stop15h 20mVirgin Atlantic
Deal found 17/9£377
Wed 1/1012:20LGW - ONT
2 stops40h 51mAmerican Airlines
Sun 5/1023:59ONT - LGW
2 stops24h 11mAmerican Airlines
Deal found 15/9£377
Sat 15/1106:20LHR - ONT
2 stops23h 15mVirgin Atlantic
Sat 13/1213:20ONT - LHR
1 stop12h 40mVirgin Atlantic
Deal found 15/9£379
Sat 22/1116:25LHR - ONT
2 stops39h 27mVirgin Atlantic
Sat 29/1111:45ONT - LHR
1 stop36h 05mVirgin Atlantic
Deal found 14/9£381
Tue 18/1115:00LHR - ONT
1 stop15h 29mBritish Airways
Tue 25/1116:47ONT - LHR
1 stop12h 28mBritish Airways
Deal found 17/9£388
Fri 26/913:25LHR - ONT
1 stop17h 15mVirgin Atlantic
Mon 6/1013:15ONT - LHR
1 stop12h 35mVirgin Atlantic
Deal found 16/9£389
Thu 30/1010:05LHR - ONT
1 stop19h 13mBritish Airways
Thu 6/1114:59ONT - LHR
1 stop12h 41mBritish Airways
Deal found 15/9£390
Wed 1/1010:30LHR - ONT
1 stop20h 03mBritish Airways
Wed 19/1116:47ONT - LHR
1 stop12h 28mBritish Airways
Deal found 15/9£391
Mon 22/915:10LHR - ONT
1 stop15h 23mBritish Airways
Wed 8/1014:51ONT - LHR
1 stop15h 34mBritish Airways
Deal found 15/9£391
Thu 2/1012:00LHR - ONT
1 stop14h 54mBritish Airways
Mon 20/1014:51ONT - LHR
1 stop13h 54mBritish Airways
Deal found 17/9£392
Mon 22/917:25LHR - ONT
2 stops38h 17mVirgin Atlantic
Tue 7/1013:15ONT - LHR
2 stops15h 55mVirgin Atlantic
Deal found 15/9£393

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 September 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

LGW - ONT

LGWONT

London Gatwick

Thu 26/2

12:30-13:44

2 stops33h 14m

Ontario

Mon 2/3

20:04-07:30

2 stops27h 26m

£359

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Wed 1/10

12:20-21:11

2 stops40h 51m

Ontario

Sun 5/10

23:59-08:10

2 stops24h 11m

£377

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/10

10:30-22:33

1 stop20h 03m

Ontario

Wed 19/11

16:47-13:15

1 stop12h 28m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 16/11

16:30-23:57

1 stop15h 27m

Ontario

Tue 25/11

12:49-11:40

1 stop14h 51m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 15/11

11:45-21:11

1 stop17h 26m

Ontario

Tue 25/11

16:47-13:15

1 stop12h 28m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/10

12:00-18:54

1 stop14h 54m

Ontario

Mon 24/11

15:19-12:15

1 stop12h 56m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/10

12:00-18:54

1 stop14h 54m

Ontario

Tue 25/11

14:59-11:40

1 stop12h 41m

£391

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 4/10

15:10-22:33

1 stop15h 23m

Ontario

Sat 18/10

16:49-12:50

1 stop12h 01m

£392

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 22/11

15:00-23:57

1 stop16h 57m

Ontario

Fri 5/12

12:46-10:00

1 stop13h 14m

£392

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 4/10

12:00-18:54

1 stop14h 54m

Ontario

Sun 19/10

16:49-12:50

1 stop12h 01m

£392

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 57 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 September 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 3 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 £501
Virgin Atlantic
Virgin Atlantic
From £483
Lufthansa
Lufthansa
From £522
United Airlines
United Airlines
From £475

What are the cheapest airlines that fly to Ontario?

The cheapest airlines flying from London to Ontario are Finnair, British Airways and United Airlines.

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 September 2025.
Get a feel of what it's like to fly with Finnair, United Airlines, andVirgin Atlantic 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
1,324 reviews
Check prices

Boarding

7.6

Overall

7.6

Comfort

7.5

Crew

8.1

Entertainment

6.9

Food

6.7

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
1,324 reviews
Finnair
7.6
Good
1,324 reviews
Check prices

Boarding

7.6

Overall

7.6

Comfort

7.5

Crew

8.1

Entertainment

6.9

Food

6.7

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
8,926 reviews
Finnair
7.6
Good
1,324 reviews
Check prices

Boarding

7.6

Overall

7.6

Comfort

7.5

Crew

8.1

Entertainment

6.9

Food

6.7

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
7.4
Good
664 reviews
Finnair
7.6
Good
1,324 reviews
Check prices

Boarding

7.6

Overall

7.6

Comfort

7.5

Crew

8.1

Entertainment

6.9

Food

6.7

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
7,409 reviews
Finnair
7.6
Good
1,324 reviews
Check prices

Boarding

7.6

Overall

7.6

Comfort

7.5

Crew

8.1

Entertainment

6.9

Food

6.7

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
7,367 reviews
Finnair
7.6
Good
1,324 reviews
Check prices

Boarding

7.6

Overall

7.6

Comfort

7.5

Crew

8.1

Entertainment

6.9

Food

6.7

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 53 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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