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, KLM 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 £442, while return flights cost around £64.

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).

£352+ Flights to Ontario, California

Flights to Ontario in 2025

Return from	£374
One-way from	£352
Popular in	August
Cheapest in	February
Average price	£477

SWISS
9/5-16/5
2 total stops
31h 35m total
London to Los Angeles

Search Deals

10/5
3 total stops
36h 10m total
London to Ontario

Search Deals

Highest demand for flights based on searches. 9% 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 April 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 29 April 2025.

Sat 10/507:30LHR - ONT

2 stops21h 23mUnited Airlines

Sat 17/506:08ONT - LHR

2 stops21h 17mUnited Airlines

Deal found 28/4£397

Sat 10/514:50LHR - ONT

1 stop14h 03mLufthansa

Sat 17/506:00ONT - LHR

1 stop24h 10mLufthansa

Deal found 28/4£408

Wed 10/911:20LHR - ONT

1 stop16h 22mKLM

Wed 17/913:00ONT - LHR

1 stop12h 50mKLM

Deal found 28/4£416

Fri 12/915:40LHR - ONT

1 stop14h 00mBritish Airways

Fri 26/917:09ONT - LHR

1 stop13h 31mBritish Airways

Deal found 28/4£432

Sat 10/515:05LGW - ONT

2 stops28h 45mMultiple Airlines

Mon 26/506:01ONT - LGW

2 stops18h 09mMultiple Airlines

Deal found 28/4£456

Sat 10/508:45LHR - ONT

2 stops19h 49mMultiple Airlines

Mon 26/506:00ONT - LHR

1 stop17h 40mMultiple Airlines

Deal found 28/4£460

Sat 10/509:30LHR - ONT

2 stops19h 23mAir Canada

Mon 26/506:00ONT - LHR

2 stops20h 00mAir Canada

Deal found 28/4£469

Sun 7/911:35LGW - ONT

2 stops20h 01mIberia

Wed 17/915:00ONT - LGW

2 stops21h 00mIberia

Deal found 28/4£472

Thu 8/510:55LHR - ONT

1 stop20h 47mVirgin Atlantic

Tue 10/613:15ONT - LHR

1 stop12h 35mVirgin Atlantic

Deal found 28/4£486

Mon 8/911:30LHR - ONT

2 stops20h 06mIberia

Mon 15/912:49ONT - LHR

1 stop14h 01mIberia

Deal found 28/4£489

Mon 8/911:20LHR - ONT

1 stop16h 22mDelta

Sat 13/922:59ONT - LHR

1 stop23h 46mDelta

Deal found 28/4£504

Mon 5/515:40LHR - ONT

1 stop14h 17mAmerican Airlines

Sun 18/516:35ONT - LHR

1 stop12h 15mAmerican Airlines

Deal found 28/4£586

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 29 April 2025.

Sat 10/507:30LHR - ONT

2 stops21h 23mUnited Airlines

Sat 17/506:08ONT - LHR

2 stops21h 17mUnited Airlines

Deal found 28/4£397

Sat 10/514:50LHR - ONT

1 stop14h 03mLufthansa

Sat 17/506:00ONT - LHR

1 stop24h 10mLufthansa

Deal found 28/4£408

Wed 10/911:20LHR - ONT

1 stop16h 22mKLM

Wed 17/913:00ONT - LHR

1 stop12h 50mKLM

Deal found 28/4£416

Fri 12/915:40LHR - ONT

1 stop14h 00mBritish Airways

Fri 26/917:09ONT - LHR

1 stop13h 31mBritish Airways

Deal found 28/4£432

Sat 10/515:05LGW - ONT

2 stops28h 45mMultiple Airlines

Mon 26/506:01ONT - LGW

2 stops18h 09mMultiple Airlines

Deal found 28/4£456

Sat 10/513:25LHR - ONT

1 stop17h 10mVirgin Atlantic

Mon 26/511:46ONT - LHR

1 stop15h 34mVirgin Atlantic

Deal found 28/4£469

Sun 7/911:35LGW - ONT

2 stops20h 01mIberia

Wed 17/915:00ONT - LGW

2 stops21h 00mIberia

Deal found 28/4£472

Mon 8/911:20LHR - ONT

1 stop16h 22mDelta

Sat 13/922:59ONT - LHR

1 stop23h 46mDelta

Deal found 28/4£504

Tue 27/514:05LHR - ONT

2 stops35h 20mAir Canada

Tue 10/605:10ONT - LHR

2 stops43h 25mAir Canada

Deal found 28/4£544

Mon 15/911:55LHR - ONT

1 stop17h 46mJetBlue

Sun 21/923:00ONT - LHR

1 stop13h 45mJetBlue

Deal found 28/4£602

Tue 3/610:55LHR - ONT

1 stop13h 22mAir France

Tue 10/613:15ONT - LHR

1 stop12h 35mAir France

Deal found 28/4£611

Thu 11/908:25LHR - ONT

2 stops21h 16mIcelandair

Sun 21/923:00ONT - LHR

1 stop13h 45mIcelandair

Deal found 28/4£632

Last-minute flights to Ontario
Discover last-minute flight deals to Ontario. Data last updated 29 April 2025 and is based on user searches.

Mon 5/515:40LHR - ONT

1 stop14h 17mAmerican Airlines

Sun 18/516:35ONT - LHR

1 stop12h 15mAmerican Airlines

Deal found 28/4£586

Mon 5/508:15LHR - ONT

1 stop21h 10mJetBlue

Tue 13/522:59ONT - LHR

1 stop13h 46mJetBlue

Deal found 28/4£680

Mon 5/522:05LHR - ONT

2 stops31h 50mMultiple Airlines

Mon 12/516:35ONT - LHR

1 stop12h 15mMultiple Airlines

Deal found 29/4£1,001

Mon 5/522:05LHR - ONT

2 stops31h 50mAvianca

Tue 13/523:25ONT - LHR

2 stops32h 10mAvianca

Deal found 28/4£1,215

Mon 5/512:20LHR - ONT

1 stop16h 14mLufthansa

Sat 10/505:05ONT - LHR

1 stop20h 35mLufthansa

Deal found 28/4£1,749

Mon 5/511:40LCY - ONT

2 stops19h 03mVirgin Atlantic

Sat 10/513:10ONT - LCY

2 stops20h 10mVirgin Atlantic

Deal found 28/4£1,780

Wed 7/511:00LHR - ONT

1 stop13h 17mKLM

Wed 21/513:10ONT - LHR

1 stop12h 40mKLM

Deal found 28/4£552

Thu 8/513:40LHR - ONT

1 stop16h 20mUnited Airlines

Sun 11/516:15ONT - LHR

1 stop12h 05mUnited Airlines

Deal found 28/4£419

Thu 8/510:55LHR - ONT

1 stop20h 47mVirgin Atlantic

Tue 10/613:15ONT - LHR

1 stop12h 35mVirgin Atlantic

Deal found 28/4£486

Thu 8/515:40LHR - ONT

1 stop14h 17mBritish Airways

Sun 18/516:35ONT - LHR

1 stop14h 05mBritish Airways

Deal found 28/4£625

Fri 9/515:05LGW - ONT

2 stops30h 47mMultiple Airlines

Sun 25/506:15ONT - LGW

2 stops17h 35mMultiple Airlines

Deal found 28/4£486

Fri 9/508:15LHR - ONT

1 stop20h 56mIcelandair

Sat 10/522:59ONT - LHR

1 stop26h 31mIcelandair

Deal found 28/4£718

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 29 April 2025.

Sat 10/507:05LHR - ONT

3 stops36h 10mMultiple Airlines

Deal found 28/4£352

Fri 13/614:00LGW - ONT

2 stops27h 01mMultiple Airlines

Deal found 28/4£381

Fri 13/610:00LHR - ONT

1 stop19h 10mLufthansa

Deal found 28/4£511

Fri 6/616:25LHR - ONT

1 stop15h 34mBritish Airways

Deal found 28/4£518

Fri 13/619:10LCY - ONT

2 stops34h 00mLufthansa

Deal found 28/4£582

Fri 6/615:10LHR - ONT

1 stop15h 52mIberia

Deal found 28/4£584

Wed 14/508:15LHR - ONT

1 stop20h 56mJetBlue

Deal found 28/4£585

Wed 27/811:45LHR - ONT

2 stops19h 58mVirgin Atlantic

Deal found 28/4£621

Wed 17/910:40LGW - ONT

2 stops20h 56mFinnair

Deal found 28/4£621

Wed 27/810:00LCY - ONT

2 stops21h 43mVirgin Atlantic

Deal found 28/4£627

Wed 17/913:05LHR - ONT

1 stop17h 36mAir France

Deal found 28/4£647

Wed 4/622:05LHR - ONT

2 stops31h 50mAvianca

Deal found 28/4£683

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

Sat 10/5

07:30-20:53

2 stops21h 23m

Ontario

Sat 17/5

06:08-11:25

2 stops21h 17m

£397

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 10/5

14:50-20:53

1 stop14h 03m

Ontario

Sat 17/5

06:00-14:10

1 stop24h 10m

£408

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 10/9

11:20-19:42

1 stop16h 22m

Ontario

Wed 17/9

13:00-09:50

1 stop12h 50m

£416

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 12/9

15:40-21:40

1 stop14h 00m

Ontario

Fri 26/9

17:09-14:40

1 stop13h 31m

£432

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Sat 10/5

15:05-11:50

2 stops28h 45m

Ontario

Mon 26/5

06:01-08:10

2 stops18h 09m

£456

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 10/5

08:45-20:34

2 stops19h 49m

Ontario

Mon 26/5

06:00-07:40

1 stop17h 40m

£460

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 10/5

13:25-22:35

1 stop17h 10m

Ontario

Mon 26/5

11:46-11:20

1 stop15h 34m

£469

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Sun 7/9

11:35-23:36

2 stops20h 01m

Ontario

Wed 17/9

15:00-20:00

2 stops21h 00m

£472

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 8/9

11:30-23:36

2 stops20h 06m

Ontario

Mon 15/9

12:49-10:50

1 stop14h 01m

£489

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 8/9

11:20-19:42

1 stop16h 22m

Ontario

Sat 13/9

22:59-06:45

1 stop23h 46m

£504

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 48 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 18 hours 11 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

From £546

Virgin Atlantic

From £546

Lufthansa

From £591

United Airlines

From £531

What are the cheapest airlines that fly to Ontario?

The cheapest airlines flying from London to Ontario are Finnair, KLM and United Airlines.

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

7,929 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

7,929 reviews

Delta

8.0

Very Good

7,929 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

1,333 reviews

Delta

8.0

Very Good

7,929 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

1,273 reviews

Delta

8.0

Very Good

7,929 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

7.4

Good

1,444 reviews

Delta

8.0

Very Good

7,929 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

8,696 reviews

Delta

8.0

Very Good

7,929 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, KLM 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 £442, while return flights cost around £64.
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

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.

£352+ 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 10/5. 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 29 April 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 29 April 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 29 April 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 29 April 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 25 April 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?

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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Travel Smart

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 29 April 2025.