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£297+ 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
27 ago — 3 set1
1 adult

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 22 agosto 2025.

Return from

£379

One-way from

£297

Popular in

December

Cheapest in

September

Average price

£578
Air Canada
  • Air Canada
  • 6/10-13/10
  • 4 total stops
  • 37h 13m total
  • London to Los Angeles
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3/9
  • 3/9
  • 2 total stops
  • 34h 33m total
  • London to Ontario
Search Deals
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 August 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 22 agosto 2025.

sáb 30/816:25LHR - ONT
1 stop27h 28mBritish Airways
qui 27/1113:31ONT - LHR
1 stop15h 44mBritish Airways
Deal found 21/8£404
sáb 30/817:25LHR - ONT
2 stops37h 15mVirgin Atlantic
qui 27/1106:43ONT - LHR
1 stop19h 47mVirgin Atlantic
Deal found 21/8£406
seg 15/910:30LHR - ONT
1 stop16h 24mBritish Airways
seg 22/914:54ONT - LHR
1 stop13h 51mBritish Airways
Deal found 21/8£410
ter 7/1008:20LHR - ONT
1 stop18h 32mBritish Airways
ter 14/1008:15ONT - LHR
1 stop14h 10mBritish Airways
Deal found 21/8£411
qua 10/908:20LHR - ONT
1 stop22h 13mBritish Airways
sex 26/914:54ONT - LHR
1 stop15h 31mBritish Airways
Deal found 21/8£412
qua 19/1106:20LHR - ONT
2 stops17h 54mVirgin Atlantic
qua 10/1212:00ONT - LHR
1 stop13h 00mVirgin Atlantic
Deal found 20/8£416
dom 5/1006:15LHR - ONT
2 stops25h 27mVirgin Atlantic
dom 12/1006:00ONT - LHR
1 stop24h 15mVirgin Atlantic
Deal found 21/8£417
sex 29/815:40LHR - ONT
1 stop13h 59mBritish Airways
ter 23/916:45ONT - LHR
1 stop13h 55mBritish Airways
Deal found 21/8£419
qua 12/1110:45LHR - ONT
1 stop13h 29mVirgin Atlantic
qua 19/1113:00ONT - LHR
1 stop13h 00mVirgin Atlantic
Deal found 20/8£421
qua 19/1110:45LHR - ONT
1 stop13h 29mVirgin Atlantic
sáb 22/1113:00ONT - LHR
1 stop13h 00mVirgin Atlantic
Deal found 21/8£425
sex 26/908:40LCY - ONT
2 stops22h 00mVirgin Atlantic
ter 7/1011:36ONT - LCY
2 stops21h 44mVirgin Atlantic
Deal found 20/8£448
qua 10/907:45LCY - ONT
2 stops22h 55mDelta
sex 26/913:15ONT - LCY
2 stops14h 25mDelta
Deal found 21/8£464

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 22 agosto 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

qua 10/9

19:15-22:40

2 stops35h 25m

Ontario

sex 26/9

11:55-06:45

1 stop34h 50m

£404

LondonOntario

LHR - ONT

LHRONT

London Heathrow

seg 26/1

12:20-22:38

1 stop18h 18m

Ontario

qui 5/2

06:45-10:30

1 stop19h 45m

£405

LondonOntario

LHR - ONT

LHRONT

London Heathrow

seg 15/9

10:30-18:54

1 stop16h 24m

Ontario

seg 22/9

14:54-12:45

1 stop13h 51m

£410

LondonOntario

LHR - ONT

LHRONT

London Heathrow

ter 7/10

08:20-18:52

1 stop18h 32m

Ontario

ter 14/10

08:15-06:25

1 stop14h 10m

£411

LondonOntario

LHR - ONT

LHRONT

London Heathrow

qua 10/9

08:20-22:33

1 stop22h 13m

Ontario

sex 26/9

14:54-14:25

1 stop15h 31m

£412

LondonOntario

LHR - ONT

LHRONT

London Heathrow

dom 5/10

16:25-23:59

1 stop15h 34m

Ontario

dom 12/10

16:49-12:50

1 stop12h 01m

£412

LondonOntario

LHR - ONT

LHRONT

London Heathrow

sáb 14/2

14:25-21:40

1 stop15h 15m

Ontario

sáb 28/2

17:03-13:15

1 stop12h 12m

£415

LondonOntario

LHR - ONT

LHRONT

London Heathrow

qua 19/11

06:20-16:14

2 stops17h 54m

Ontario

qua 10/12

12:00-09:00

1 stop13h 00m

£416

LondonOntario

LHR - ONT

LHRONT

London Heathrow

ter 7/10

06:10-22:42

2 stops24h 32m

Ontario

ter 14/10

10:57-10:50

1 stop15h 53m

£417

LondonOntario

LHR - ONT

LHRONT

London Heathrow

dom 5/10

06:15-23:42

2 stops25h 27m

Ontario

dom 12/10

06:00-14:15

1 stop24h 15m

£417

Flights are sorted by cheapest return flights first.

Deals found on 21/8

Showing 1-10 of 54 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 8 August 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 76 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 18 hours 37 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 £504
KLM
KLM
From £459
Lufthansa
Lufthansa
From £522

What are the cheapest airlines that fly to Ontario?

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

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 22 agosto 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
1,320 reviews
Check prices

Entertainment

6.9

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Overall

7.6

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
1,320 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Entertainment

6.9

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Overall

7.6

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
8,934 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Entertainment

6.9

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Overall

7.6

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
658 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Entertainment

6.9

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Overall

7.6

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
7,350 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Entertainment

6.9

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Overall

7.6

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
7,292 reviews
Finnair
7.6
Good
1,320 reviews
Check prices

Entertainment

6.9

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Overall

7.6

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 (14 hours 57 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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