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.

What is the cheapest month to fly to Ontario?

Currently, March is the cheapest month in which you can book a flight to Ontario . Flying to Ontario in August will prove the most costly. There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

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.

What is the cheapest airport to fly to in Ontario?

Ontario is currently the cheapest airport to fly to in Ontario. One-way flights to Ontario typically cost £131, while return flights cost around £64.

How much is a return flight to Ontario?

A return flight to Ontario will typically cost around £98, however they can be found for as little as £86.

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).

£379+ Flights to Ontario, California

Flights to Ontario in 2025

Return from	£376
One-way from	£421
Popular in	August
Cheapest in	February
Average price	£497

Air Canada
30/10-14/11
4 total stops
37h 32m total
London to Los Angeles

Search Deals

Iberia
1/9
1 total stop
15h 42m total
London to Ontario

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£40 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for return flights in June 2025

Search Deals

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 19 June 2025.

Tue 4/1114:55LHR - ONT

1 stop15h 05mBritish Airways

Tue 25/1117:01ONT - LHR

1 stop12h 19mBritish Airways

Deal found 17/6£379

Sat 1/1106:20LHR - ONT

2 stops23h 26mVirgin Atlantic

Sat 8/1113:00ONT - LHR

1 stop13h 00mVirgin Atlantic

Deal found 16/6£384

Mon 24/1106:30LHR - ONT

2 stops18h 47mDelta

Fri 5/1211:29ONT - LHR

1 stop15h 31mDelta

Deal found 18/6£395

Mon 25/815:05LGW - ONT

2 stops52h 27mMultiple Airlines

Sat 20/906:10ONT - LGW

2 stops18h 00mMultiple Airlines

Deal found 17/6£405

Thu 30/1009:20LHR - ONT

1 stop17h 22mKLM

Wed 12/1112:00ONT - LHR

1 stop14h 35mKLM

Deal found 17/6£409

Wed 27/812:00LGW - ONT

2 stops39h 11mKLM

Fri 5/907:05ONT - LGW

2 stops18h 55mKLM

Deal found 17/6£421

Sat 23/812:00LHR - ONT

1 stop14h 24mAmerican Airlines

Thu 4/912:46ONT - LHR

1 stop14h 04mAmerican Airlines

Deal found 16/6£428

Tue 15/710:05LHR - ONT

2 stops19h 33mFinnair

Mon 21/700:59ONT - LHR

2 stops21h 56mFinnair

Deal found 16/6£447

Tue 15/709:15LHR - ONT

1 stop20h 23mMultiple Airlines

Tue 22/710:53ONT - LHR

1 stop14h 07mMultiple Airlines

Deal found 17/6£461

Fri 4/710:30LHR - ONT

1 stop16h 31mIberia

Tue 8/712:46ONT - LHR

1 stop17h 39mIberia

Deal found 17/6£486

Fri 27/612:00LGW - ONT

2 stops18h 25mDelta

Sat 5/711:49ONT - LGW

2 stops38h 11mDelta

Deal found 18/6£492

Wed 29/1015:00LHR - ONT

2 stops38h 45mAir Canada

Wed 5/1105:40ONT - LHR

2 stops21h 40mAir Canada

Deal found 16/6£510

Best flights to Ontario
Discover carefully curated flight deals to Ontario that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 19 June 2025.

Tue 4/1114:55LHR - ONT

1 stop15h 05mBritish Airways

Tue 25/1117:01ONT - LHR

1 stop12h 19mBritish Airways

Deal found 17/6£379

Sat 1/1106:20LHR - ONT

2 stops23h 26mVirgin Atlantic

Sat 8/1113:00ONT - LHR

1 stop13h 00mVirgin Atlantic

Deal found 16/6£384

Mon 24/1106:30LHR - ONT

2 stops24h 12mDelta

Fri 5/1206:00ONT - LHR

2 stops22h 15mDelta

Deal found 18/6£395

Mon 25/815:05LGW - ONT

2 stops52h 27mMultiple Airlines

Sat 20/906:10ONT - LGW

2 stops18h 00mMultiple Airlines

Deal found 17/6£405

Thu 30/1009:20LHR - ONT

1 stop17h 22mKLM

Wed 12/1112:00ONT - LHR

1 stop14h 35mKLM

Deal found 17/6£409

Sat 23/812:00LHR - ONT

1 stop14h 24mAmerican Airlines

Thu 4/912:46ONT - LHR

1 stop14h 04mAmerican Airlines

Deal found 16/6£428

Tue 15/710:05LHR - ONT

2 stops19h 33mFinnair

Mon 21/700:59ONT - LHR

2 stops21h 56mFinnair

Deal found 16/6£447

Fri 4/710:30LHR - ONT

1 stop16h 31mIberia

Tue 8/712:46ONT - LHR

1 stop17h 39mIberia

Deal found 17/6£486

Wed 29/1015:00LHR - ONT

2 stops38h 45mAir Canada

Wed 5/1105:40ONT - LHR

2 stops21h 40mAir Canada

Deal found 16/6£510

Fri 26/914:50LHR - ONT

1 stop13h 34mUnited Airlines

Wed 8/1013:53ONT - LHR

1 stop12h 32mUnited Airlines

Deal found 17/6£528

Thu 11/908:15LHR - ONT

1 stop21h 14mJetBlue

Sun 21/922:56ONT - LHR

1 stop13h 49mJetBlue

Deal found 18/6£566

Wed 27/812:00LGW - ONT

2 stops39h 11mKLM

Fri 5/907:05ONT - LGW

2 stops18h 55mKLM

Deal found 17/6£421

Last-minute flights to Ontario
Discover last-minute flight deals to Ontario. Data last updated 19 June 2025 and is based on user searches.

Mon 23/611:55LHR - ONT

1 stop18h 04mJetBlue

Sat 28/623:59ONT - LHR

1 stop25h 31mJetBlue

Deal found 16/6£790

Tue 24/616:25LHR - ONT

1 stop15h 34mIberia

Mon 30/610:54ONT - LHR

1 stop14h 06mIberia

Deal found 16/6£490

Wed 25/611:15LHR - ONT

1 stop18h 23mBritish Airways

Mon 30/616:50ONT - LHR

1 stop12h 00mBritish Airways

Deal found 17/6£432

Wed 25/611:00LHR - ONT

1 stop13h 28mVirgin Atlantic

Sun 29/607:05ONT - LHR

1 stop22h 25mVirgin Atlantic

Deal found 16/6£447

Wed 25/606:30LHR - ONT

2 stops17h 58mDelta

Mon 7/722:05ONT - LHR

1 stop31h 25mDelta

Deal found 18/6£449

Wed 25/611:35LGW - ONT

2 stops19h 27mIberia

Fri 4/712:49ONT - LGW

2 stops47h 11mIberia

Deal found 18/6£649

Wed 25/609:55LHR - ONT

2 stops20h 51mDelta

Fri 4/707:05ONT - LHR

2 stops16h 10mDelta

Deal found 18/6£449

Wed 25/611:35LGW - ONT

2 stops19h 27mIberia

Sat 5/710:53ONT - LGW

2 stops25h 07mIberia

Deal found 18/6£649

Thu 26/611:15LHR - ONT

1 stop14h 57mAmerican Airlines

Wed 9/716:45ONT - LHR

1 stop12h 05mAmerican Airlines

Deal found 18/6£463

Thu 26/611:55LHR - ONT

1 stop18h 04mIcelandair

Sat 28/623:59ONT - LHR

1 stop25h 31mIcelandair

Deal found 18/6£858

Fri 27/612:00LGW - ONT

2 stops18h 25mDelta

Sat 5/711:49ONT - LGW

2 stops38h 11mDelta

Deal found 18/6£492

Fri 27/612:00LGW - ONT

2 stops18h 25mKLM

Fri 4/707:05ONT - LGW

2 stops42h 55mKLM

Deal found 18/6£568

One-way flights to Ontario
Search for one-way flight options to Ontario. Find affordable one-way fares based on user searches. Data last updated 19 June 2025.

Mon 1/916:25LHR - ONT

1 stop15h 42mIberia

Deal found 17/6£421

Tue 19/812:00LHR - ONT

1 stop14h 24mBritish Airways

Deal found 17/6£444

Mon 14/706:45LCY - ONT

2 stops23h 25mMultiple Airlines

Deal found 18/6£520

Mon 1/906:00LHR - ONT

2 stops25h 40mMultiple Airlines

Deal found 17/6£538

Wed 17/911:55LHR - ONT

1 stop17h 34mJetBlue

Deal found 16/6£588

Mon 29/922:05LHR - ONT

2 stops31h 50mAvianca

Deal found 16/6£643

Fri 28/1111:20LGW - ONT

2 stops20h 25mMultiple Airlines

Deal found 17/6£668

Sun 9/1110:45LHR - ONT

1 stop13h 29mVirgin Atlantic

Deal found 16/6£686

Sat 29/1114:55LHR - ONT

1 stop15h 05mAmerican Airlines

Deal found 18/6£701

Thu 6/1110:45LHR - ONT

1 stop13h 29mKLM

Deal found 17/6£707

Wed 17/907:10LGW - ONT

2 stops23h 23mIberia

Deal found 18/6£742

Thu 16/1009:20LCY - ONT

2 stops21h 22mVirgin Atlantic

Deal found 17/6£763

Cheapflights Fare Finder

Use the filters below to find and compare flights to Ontario that are best for you.

Fly from

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 4/11

14:55-22:00

1 stop15h 05m

Ontario

Tue 25/11

17:01-13:20

1 stop12h 19m

£379

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 1/11

06:20-22:46

2 stops23h 26m

Ontario

Sat 8/11

13:00-10:00

1 stop13h 00m

£384

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 24/11

06:30-22:42

2 stops24h 12m

Ontario

Fri 5/12

06:00-12:15

2 stops22h 15m

£395

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Mon 25/8

15:05-11:32

2 stops52h 27m

Ontario

Sat 20/9

06:10-08:10

2 stops18h 00m

£405

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 30/10

09:20-19:42

1 stop17h 22m

Ontario

Wed 12/11

12:00-10:35

1 stop14h 35m

£409

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Wed 27/8

12:00-19:11

2 stops39h 11m

Ontario

Fri 5/9

07:05-10:00

2 stops18h 55m

£421

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 23/8

12:00-18:24

1 stop14h 24m

Ontario

Thu 4/9

12:46-10:50

1 stop14h 04m

£428

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 15/7

10:05-21:38

2 stops19h 33m

Ontario

Tue 22/7

08:15-06:25

1 stop14h 10m

£447

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 15/7

09:15-21:38

1 stop20h 23m

Ontario

Tue 22/7

10:53-09:00

1 stop14h 07m

£461

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 4/7

10:30-19:01

1 stop16h 31m

Ontario

Tue 8/7

12:46-14:25

1 stop17h 39m

£486

Flights are sorted by cheapest return flights first.

Deals found on 17/6

Showing 1-10 of 39 results

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?

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 77 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 16 hours 35 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.

What are the cheapest airlines that fly to Ontario?

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

Rainfall in Ontario 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

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

Read reviews from past customers who have flown Delta, KLM and Finnair to Ontario. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,964 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

7,964 reviews

Delta

8.0

Very Good

7,964 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,365 reviews

Delta

8.0

Very Good

7,964 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair

7.6

Good

1,292 reviews

Delta

8.0

Very Good

7,964 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Air France

7.5

Good

1,467 reviews

Delta

8.0

Very Good

7,964 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines

7.4

Good

8,810 reviews

Delta

8.0

Very Good

7,964 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.
What is the cheapest airport to fly to in Ontario?
Ontario is currently the cheapest airport to fly to in Ontario. One-way flights to Ontario typically cost £131, while return flights cost around £64.
How much is a return flight to Ontario?
A return flight to Ontario will typically cost around £98, however they can be found for as little as £86.
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

Browse thousands of different options on Cheapflights for your next trip

Fly with Cheapflights

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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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

£379+ Cheap flights to Ontario

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/11. Fares are subject to change and may not be available on all flights or dates of travel.

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 19 June 2025.

Return from

One-way from

Popular in

Cheapest in

Average price

Find flight deals to Ontario

Cheapest flights to OntarioExplore the most affordable flight options available to Ontario. Find the lowest fares based on data from user searches, with prices last updated on 19 June 2025.

Explore the most affordable flight options available to Ontario. Find the lowest fares based on data from user searches, with prices last updated on 19 June 2025.

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 19 June 2025.

Use the filters below to find and compare flights to Ontario that are best for you.

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.

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 13 June 2025.

How long is the flight to Ontario?

What are the most popular airlines that fly to Ontario?

What are the cheapest airlines that fly to Ontario?

Rainfall in Ontario by month

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

Temperature in Ontario by month

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

Reviews of airlines servicing Ontario

Read reviews from past customers who have flown Delta, KLM and Finnair to Ontario. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

FAQs about flying to Ontario

Ontario airport overview

What airport do you fly into for flights to Ontario?

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

What is the best airline to fly to Ontario?

What is the cheapest airport to fly to in Ontario?

How much is a return flight to Ontario?

Where does the fastest flight to Ontario depart from?

Does Ontario have car hire?

Are there hotels close to Ontario?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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.

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?

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

Can Cheapflights find flights to Ontario with no change fees?

Can Cheapflights notify me if prices for flights to Ontario become cheaper?

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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 19 June 2025.