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 £121, while return flights cost around £63.

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 28 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).

£347+ Flights to Ontario, California

Flights to Ontario in 2025

Return from	£370
One-way from	£347
Popular in	August
Cheapest in	February
Average price	£491

Air France
25/8-22/9
Nonstop
21h 55m total
London to Los Angeles

Search Deals

9/9
2 total stops
32h 44m 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 13 June 2025.

Mon 8/915:05LGW - ONT

2 stops28h 51mMultiple Airlines

Mon 15/922:35ONT - LGW

2 stops25h 35mMultiple Airlines

Deal found 10/6£356

Tue 2/915:05LGW - ONT

2 stops28h 51mAmerican Airlines

Tue 9/916:45ONT - LGW

2 stops31h 25mAmerican Airlines

Deal found 11/6£364

Mon 1/916:25LHR - ONT

1 stop15h 42mBritish Airways

Tue 30/916:45ONT - LHR

1 stop13h 55mBritish Airways

Deal found 11/6£370

Wed 17/911:45LHR - ONT

2 stops20h 01mVirgin Atlantic

Wed 24/912:00ONT - LHR

1 stop17h 30mVirgin Atlantic

Deal found 10/6£372

Mon 8/906:30LHR - ONT

2 stops18h 41mKLM

Mon 15/909:55ONT - LHR

1 stop15h 55mKLM

Deal found 10/6£373

Tue 2/912:00LHR - ONT

1 stop14h 24mAmerican Airlines

Mon 8/914:54ONT - LHR

1 stop34h 06mAmerican Airlines

Deal found 11/6£387

Mon 18/806:30LHR - ONT

2 stops34h 25mDelta

Thu 11/911:29ONT - LHR

1 stop18h 46mDelta

Deal found 12/6£391

Wed 17/908:40LCY - ONT

2 stops23h 06mVirgin Atlantic

Wed 24/907:00ONT - LCY

2 stops18h 30mVirgin Atlantic

Deal found 10/6£423

Tue 8/710:30LHR - ONT

1 stop20h 04mFinnair

Tue 15/716:45ONT - LHR

1 stop13h 55mFinnair

Deal found 11/6£440

Mon 23/608:40LCY - ONT

2 stops23h 06mDelta

Mon 7/707:05ONT - LCY

2 stops17h 45mDelta

Deal found 12/6£476

Mon 23/611:15LHR - ONT

1 stop14h 57mRoyal Air Maroc

Mon 7/708:15ONT - LHR

1 stop16h 45mRoyal Air Maroc

Deal found 10/6£476

Mon 22/912:05LHR - ONT

2 stops18h 25mUnited Airlines

Mon 29/913:15ONT - LHR

1 stop12h 25mUnited Airlines

Deal found 11/6£486

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 13 June 2025.

Mon 8/915:05LGW - ONT

2 stops28h 51mMultiple Airlines

Mon 15/922:35ONT - LGW

2 stops25h 35mMultiple Airlines

Deal found 10/6£356

Tue 2/915:05LGW - ONT

2 stops28h 51mAmerican Airlines

Tue 9/916:45ONT - LGW

2 stops31h 25mAmerican Airlines

Deal found 11/6£364

Mon 1/908:20LHR - ONT

1 stop18h 04mBritish Airways

Tue 30/908:15ONT - LHR

1 stop14h 10mBritish Airways

Deal found 11/6£370

Wed 17/911:45LHR - ONT

2 stops20h 01mVirgin Atlantic

Wed 24/912:00ONT - LHR

1 stop17h 30mVirgin Atlantic

Deal found 10/6£372

Mon 8/906:30LHR - ONT

2 stops18h 41mKLM

Mon 15/909:55ONT - LHR

1 stop15h 55mKLM

Deal found 10/6£373

Mon 18/806:30LHR - ONT

2 stops34h 25mDelta

Thu 11/911:29ONT - LHR

1 stop18h 46mDelta

Deal found 12/6£391

Tue 8/710:30LHR - ONT

1 stop20h 04mFinnair

Tue 15/716:45ONT - LHR

1 stop13h 55mFinnair

Deal found 11/6£440

Mon 23/611:15LHR - ONT

1 stop14h 57mRoyal Air Maroc

Mon 7/708:15ONT - LHR

1 stop16h 45mRoyal Air Maroc

Deal found 10/6£476

Mon 22/912:05LHR - ONT

2 stops18h 25mUnited Airlines

Mon 29/913:15ONT - LHR

1 stop12h 25mUnited Airlines

Deal found 11/6£486

Thu 26/612:00LHR - ONT

1 stop15h 01mIberia

Wed 2/712:49ONT - LHR

1 stop14h 01mIberia

Deal found 10/6£489

Mon 25/811:25LCY - ONT

2 stops31h 10mAlaska Airlines

Mon 1/916:50ONT - LCY

3 stops30h 25mAlaska Airlines

Deal found 10/6£701

Tue 2/912:00LHR - ONT

1 stop14h 24mAmerican Airlines

Wed 10/913:10ONT - LHR

1 stop15h 40mAmerican Airlines

Deal found 11/6£387

Last-minute flights to Ontario
Discover last-minute flight deals to Ontario. Data last updated 13 June 2025 and is based on user searches.

Tue 17/610:55LHR - ONT

1 stop13h 33mKLM

Wed 25/613:15ONT - LHR

1 stop12h 35mKLM

Deal found 10/6£412

Tue 17/615:40LHR - ONT

1 stop13h 58mBritish Airways

Tue 24/614:40ONT - LHR

1 stop14h 05mBritish Airways

Deal found 10/6£415

Tue 17/611:45LHR - ONT

2 stops20h 01mVirgin Atlantic

Tue 24/607:05ONT - LHR

1 stop22h 25mVirgin Atlantic

Deal found 10/6£418

Thu 19/615:40LHR - ONT

1 stop13h 58mAmerican Airlines

Sat 5/716:45ONT - LHR

1 stop12h 05mAmerican Airlines

Deal found 10/6£493

Thu 19/610:55LHR - ONT

1 stop13h 33mKLM

Mon 23/613:15ONT - LHR

1 stop12h 35mKLM

Deal found 12/6£460

Fri 20/610:40LGW - ONT

2 stops42h 58mAmerican Airlines

Sun 6/706:10ONT - LGW

2 stops42h 25mAmerican Airlines

Deal found 12/6£431

Fri 20/616:25LHR - ONT

1 stop15h 34mIberia

Tue 29/712:46ONT - LHR

1 stop14h 04mIberia

Deal found 12/6£532

Fri 20/608:15LHR - ONT

1 stop21h 44mIcelandair

Mon 7/723:59ONT - LHR

1 stop25h 31mIcelandair

Deal found 12/6£708

Fri 20/612:00LGW - ONT

2 stops39h 54mKLM

Fri 4/711:49ONT - LGW

2 stops38h 11mKLM

Deal found 12/6£802

Sat 21/614:50LHR - ONT

1 stop14h 14mUnited Airlines

Thu 26/613:34ONT - LHR

1 stop12h 06mUnited Airlines

Deal found 11/6£806

Sat 21/608:15LHR - ONT

1 stop21h 44mJetBlue

Thu 26/623:59ONT - LHR

1 stop25h 31mJetBlue

Deal found 12/6£1,019

Sun 22/610:55LHR - ONT

1 stop13h 33mDelta

Thu 17/706:25ONT - LHR

1 stop23h 50mDelta

Deal found 11/6£487

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 13 June 2025.

Tue 9/910:00LGW - ONT

2 stops32h 44mMultiple Airlines

Deal found 12/6£347

Tue 9/906:15LHR - ONT

3 stops22h 27mMultiple Airlines

Deal found 12/6£428

Tue 16/912:00LHR - ONT

1 stop14h 54mBritish Airways

Deal found 12/6£436

Tue 1/715:10LHR - ONT

1 stop15h 01mIberia

Deal found 12/6£463

Mon 15/908:15LHR - ONT

1 stop21h 14mJetBlue

Deal found 11/6£583

Wed 12/1106:20LHR - ONT

2 stops17h 54mVirgin Atlantic

Deal found 11/6£622

Mon 10/1106:30LHR - ONT

2 stops24h 12mDelta

Deal found 11/6£637

Wed 18/622:05LHR - ONT

2 stops31h 50mAvianca

Deal found 12/6£646

Wed 22/1011:35LGW - ONT

2 stops20h 27mBritish Airways

Deal found 12/6£717

Wed 17/907:10LGW - ONT

2 stops19h 50mIberia

Deal found 12/6£734

Thu 9/1010:55LHR - ONT

1 stop13h 19mAir France

Deal found 10/6£780

Tue 9/908:10LCY - ONT

2 stops34h 34mMultiple Airlines

Deal found 12/6£812

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

LGW - ONT

LGWONT

London Gatwick

Mon 8/9

15:05-11:56

2 stops28h 51m

Ontario

Mon 15/9

22:35-08:10

2 stops25h 35m

£356

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Tue 2/9

15:05-11:56

2 stops28h 51m

Ontario

Tue 9/9

16:45-08:10

2 stops31h 25m

£364

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 1/9

16:25-00:07

1 stop15h 42m

Ontario

Tue 30/9

16:45-14:40

1 stop13h 55m

£370

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 17/9

11:45-23:46

2 stops20h 01m

Ontario

Wed 24/9

12:00-13:30

1 stop17h 30m

£372

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 8/9

06:30-17:11

2 stops18h 41m

Ontario

Mon 15/9

09:55-09:50

1 stop15h 55m

£373

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 2/9

12:00-18:24

1 stop14h 24m

Ontario

Tue 9/9

16:45-12:50

1 stop12h 05m

£387

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 18/8

06:30-08:55

2 stops34h 25m

Ontario

Thu 11/9

11:29-14:15

1 stop18h 46m

£391

LondonOntario

LCY - ONT

LCYONT

London City

Wed 17/9

08:40-23:46

2 stops23h 06m

Ontario

Wed 24/9

07:00-09:30

2 stops18h 30m

£423

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 8/7

10:30-22:34

1 stop20h 04m

Ontario

Tue 15/7

16:45-14:40

1 stop13h 55m

£440

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 23/6

11:15-18:12

1 stop14h 57m

Ontario

Mon 7/7

08:15-09:00

1 stop16h 45m

£476

Flights are sorted by cheapest return flights first.

Deals found on 12/6

Showing 1-10 of 41 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 17 hours 31 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, Alaska Airlines and KLM to Ontario. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,950 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

7,950 reviews

Delta

8.0

Very Good

7,950 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

Alaska Airlines

8.0

Very Good

10,000 reviews

Delta

8.0

Very Good

7,950 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

1,358 reviews

Delta

8.0

Very Good

7,950 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

1,290 reviews

Delta

8.0

Very Good

7,950 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

1,463 reviews

Delta

8.0

Very Good

7,950 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 £121, while return flights cost around £63.
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 28 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.

£347+ 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 9/9. 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 13 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 13 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 13 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 13 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 9 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, Alaska Airlines and KLM 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 13 June 2025.