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£364+ 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
— ONT
21 Jun — 28 Jun1
1 adult
1 adult, Economy, 0 bags

Flights to Ontario in 2026

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 22 May 2026.

Wed 2/1215:00
LHR
-
ONT
1 stop15h 19m
British Airways
Tue 8/1214:56
ONT
-
LHR
1 stop13h 04m
British Airways
Deal found 17/5£463
Wed 4/1115:00
LHR
-
ONT
1 stop15h 23m
British Airways
Tue 10/1116:47
ONT
-
LHR
1 stop12h 28m
British Airways
Deal found 17/5£484
Tue 17/1116:30
LHR
-
ONT
1 stop15h 27m
Iberia
Tue 8/1210:47
ONT
-
LHR
1 stop13h 28m
Iberia
Deal found 18/5£488
Wed 15/708:55
LHR
-
ONT
1 stop19h 04m
American Airlines
Wed 29/710:25
ONT
-
LHR
1 stop14h 35m
American Airlines
Deal found 17/5£491
Wed 7/1006:55
LHR
-
ONT
2 stops18h 56m
United Airlines
Fri 20/1118:53
ONT
-
LHR
2 stops29h 37m
United Airlines
Deal found 20/5£491
Mon 17/816:25
LHR
-
ONT
1 stop34h 22m
Iberia
Mon 31/810:29
ONT
-
LHR
1 stop14h 31m
Iberia
Deal found 17/5£492
Mon 16/1115:00
LHR
-
ONT
1 stop15h 23m
British Airways
Mon 7/1216:47
ONT
-
LHR
1 stop12h 28m
British Airways
Deal found 18/5£494
Mon 10/812:00
LHR
-
ONT
1 stop17h 11m
American Airlines
Thu 27/806:00
ONT
-
LHR
2 stops20h 15m
American Airlines
Deal found 19/5£495
Thu 19/1115:00
LHR
-
ONT
1 stop15h 23m
British Airways
Thu 26/1116:47
ONT
-
LHR
1 stop12h 28m
British Airways
Deal found 18/5£499
Wed 27/511:00
LHR
-
ONT
1 stop15h 22m
British Airways
Tue 16/613:11
ONT
-
LHR
1 stop13h 39m
British Airways
Deal found 17/5£500
Wed 8/719:45
LHR
-
ONT
2 stops34h 58m
Virgin Atlantic
Tue 14/718:01
ONT
-
LHR
1 stop13h 34m
Virgin Atlantic
Deal found 17/5£501
Tue 9/616:25
LHR
-
ONT
1 stop15h 34m
British Airways
Tue 16/613:11
ONT
-
LHR
1 stop13h 39m
British Airways
Deal found 17/5£503

Find flight deals to Ontario

Find the latest flights to Ontario in 2026, 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 May 2026.

Return from

£473

One-way from

£364

Popular in

December

Cheapest in

September

Average price

£474
Virgin Atlantic
  • Virgin Atlantic
  • 28/8-13/9
  • 1 total stop
  • 26h 35m total
  • London to Los Angeles
Search Deals
9/11
  • 9/11
  • 2 total stops
  • 21h 58m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£21 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for return flights in May 2026
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 22 May 2026.
Use the filters below to find and compare flights to Ontario that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 24/9

14:50-20:52

1 stop14h 02m

Ontario

Fri 2/10

13:18-09:40

1 stop12h 22m

£506

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 7/10

14:50-20:52

1 stop14h 02m

Ontario

Fri 20/11

18:53-11:20

2 stops32h 27m

£516

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 13/8

06:30-16:24

2 stops17h 54m

Ontario

Wed 19/8

12:32-13:15

1 stop16h 43m

£551

LondonOntario

LCY - ONT

LCYONT

London City

Fri 5/6

09:20-22:32

2 stops21h 12m

Ontario

Mon 8/6

17:21-16:40

2 stops15h 19m

£570

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 2/7

13:40-21:55

1 stop16h 15m

Ontario

Wed 23/9

13:18-12:35

1 stop15h 17m

£593

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 5/8

09:50-23:11

1 stop21h 21m

Ontario

Wed 12/8

12:33-10:55

1 stop14h 22m

£596

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 16/6

13:40-21:55

1 stop16h 15m

Ontario

Tue 7/7

16:20-14:10

1 stop13h 50m

£615

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 26/10

12:05-21:21

1 stop16h 16m

Ontario

Thu 29/10

13:00-09:40

1 stop13h 40m

£617

LondonOntario

LCY - ONT

LCYONT

London City

Tue 2/6

10:00-22:32

2 stops20h 32m

Ontario

Wed 10/6

13:00-16:40

2 stops19h 40m

£623

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Wed 17/6

10:25-22:41

2 stops20h 16m

Ontario

Thu 2/7

06:20-09:25

2 stops19h 05m

£636

Flights are sorted by cheapest return flights first.

Deals found on 21/5

Showing 1-10 of 59 resultsSorted by cheapest first
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6

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

How long is the flight to Ontario?

On average, a flight from London to Ontario takes 17 hours 12 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 United Airlines.

British Airways
British Airways
From £368
Virgin Atlantic
Virgin Atlantic
From £373
United Airlines
United Airlines
From £365

What are the cheapest airlines that fly to Ontario?

The cheapest airlines flying from London to Ontario are United Airlines, 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).

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

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 54 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 May 2026.
Get a feel of what it's like to fly with Virgin Atlantic,United Airlines, andBritish Airways 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.
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
689 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
United Airlines
7.4
Good
9,750 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
7,991 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Boarding

7.7

Crew

8.1

Comfort

7.3

Entertainment

7.5

Food

6.9

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

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, United Airlines 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 52 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

Browse thousands of different options on Cheapflights for your next trip

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Search flights to Ontario by cabin class

Find flights to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class flights to Ontario
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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