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£310+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
26 Jan — 2 Feb1
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 27 December 2025.

Mon 29/1206:30LHR - ONT
2 stops18h 38mDelta
Thu 8/117:07ONT - LHR
2 stops29h 43mDelta
Deal found 27/12£481
Tue 30/1210:45LHR - ONT
1 stop33h 44mDelta
Thu 8/122:30ONT - LHR
2 stops25h 35mDelta
Deal found 27/12£493
Sun 28/1212:20LHR - ONT
1 stop18h 29mVirgin Atlantic
Thu 15/107:30ONT - LHR
1 stop20h 25mVirgin Atlantic
Deal found 27/12£523
Tue 30/1210:45LHR - ONT
1 stop13h 27mVirgin Atlantic
Sat 10/106:00ONT - LHR
1 stop20h 00mVirgin Atlantic
Deal found 26/12£590
Fri 26/1206:30LHR - ONT
2 stops24h 53mDelta
Fri 16/106:00ONT - LHR
2 stops17h 05mDelta
Deal found 24/12£598
Sun 28/1210:45LHR - ONT
1 stop13h 27mDelta
Tue 6/107:30ONT - LHR
1 stop19h 00mDelta
Deal found 26/12£610
Sat 27/1210:45LHR - ONT
1 stop13h 27mVirgin Atlantic
Thu 8/107:30ONT - LHR
1 stop19h 00mVirgin Atlantic
Deal found 26/12£620
Fri 26/1210:45LHR - ONT
1 stop20h 38mKLM
Fri 16/122:30ONT - LHR
1 stop29h 10mKLM
Deal found 24/12£621
Wed 31/1212:20LHR - ONT
1 stop32h 12mDelta
Fri 9/115:30ONT - LHR
1 stop35h 00mDelta
Deal found 27/12£641
Wed 31/1207:35LHR - ONT
2 stops38h 17mBritish Airways
Thu 8/106:00ONT - LHR
1 stop18h 35mBritish Airways
Deal found 26/12£652
Fri 26/1215:50LHR - ONT
1 stop26h 10mDelta
Tue 30/1211:10ONT - LHR
1 stop13h 50mDelta
Deal found 26/12£659
Tue 30/1219:15LCY - ONT
2 stops50h 37mBritish Airways
Wed 14/110:58ONT - LCY
2 stops19h 07mBritish Airways
Deal found 26/12£818

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 27 December 2025.

Return from

£403

One-way from

£310

Popular in

December

Cheapest in

September

Average price

£590
Virgin Atlantic
  • Virgin Atlantic
  • 20/1-27/1
  • 4 total stops
  • 36h 19m total
  • London to Los Angeles
Search Deals
British Airways
  • British Airways
  • 3/3
  • 2 total stops
  • 24h 49m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£26 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 27 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

Wed 11/3

12:20-22:33

1 stop17h 13m

Ontario

Thu 26/3

11:59-10:30

1 stop15h 31m

£358

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/3

06:30-22:57

2 stops23h 27m

Ontario

Thu 26/3

13:50-09:40

1 stop12h 50m

£364

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 22/1

07:30-21:58

2 stops22h 28m

Ontario

Mon 26/1

05:05-06:20

2 stops17h 15m

£368

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 9/3

11:25-13:57

2 stops33h 32m

Ontario

Tue 24/3

17:02-13:15

1 stop13h 13m

£378

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 12/3

07:30-22:30

2 stops22h 00m

Ontario

Tue 24/3

17:02-13:15

1 stop13h 13m

£378

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 10/3

08:55-21:04

1 stop19h 09m

Ontario

Tue 24/3

12:50-09:00

1 stop13h 10m

£381

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 9/3

14:30-22:33

1 stop15h 03m

Ontario

Tue 24/3

11:59-10:30

1 stop15h 31m

£381

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 8/1

12:05-21:58

1 stop17h 53m

Ontario

Wed 14/1

13:24-09:40

1 stop12h 16m

£387

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 12/3

11:35-20:50

1 stop16h 15m

Ontario

Tue 24/3

13:50-09:40

1 stop12h 50m

£387

LondonOntario

LCY - ONT

LCYONT

London City

Mon 9/2

07:45-21:05

2 stops21h 20m

Ontario

Mon 16/2

13:15-16:35

2 stops19h 20m

£413

Flights are sorted by cheapest return flights first.

Deals found on 24/12

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 19 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 23 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 £366
Virgin Atlantic
Virgin Atlantic
From £358
KLM
KLM
From £366
Lufthansa
Lufthansa
From £387

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 27 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
1,339 reviews
Check prices

Overall

7.6

Crew

8.1

Entertainment

6.9

Food

6.7

Boarding

7.6

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
1,339 reviews
Finnair
7.6
Good
1,339 reviews
Check prices

Overall

7.6

Crew

8.1

Entertainment

6.9

Food

6.7

Boarding

7.6

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
677 reviews
Finnair
7.6
Good
1,339 reviews
Check prices

Overall

7.6

Crew

8.1

Entertainment

6.9

Food

6.7

Boarding

7.6

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
9,116 reviews
Finnair
7.6
Good
1,339 reviews
Check prices

Overall

7.6

Crew

8.1

Entertainment

6.9

Food

6.7

Boarding

7.6

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
7,656 reviews
Finnair
7.6
Good
1,339 reviews
Check prices

Overall

7.6

Crew

8.1

Entertainment

6.9

Food

6.7

Boarding

7.6

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
7,618 reviews
Finnair
7.6
Good
1,339 reviews
Check prices

Overall

7.6

Crew

8.1

Entertainment

6.9

Food

6.7

Boarding

7.6

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 19 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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