£69+ Cheap flights from Ontario

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ONT — LHR
27 Dec — 3 Jan1
1 adult
1 adult, Economy, 0 bags

What to know about flights from Ontario

Discover essential information about flights departing from Ontario, including flight schedules, destinations, airlines operating at the Ontario airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 27 November 2025.

Cheapest one-way flight

£25

Cheapest round-trip flight

£67

Cheapest airline

Alaska Airlines

Most popular destination

London Heathrow (LHR)

Good round-trip deal

£66 or less

Good one-way deal

£139 or less
The cheapest one-way flight from Ontario is currently to Las Vegas Harry Reid Intl.
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The cheapest round-trip flight from Ontario is currently to Las Vegas Harry Reid Intl.
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On average, Alaska Airlines currently has the cheapest one-way flight from Ontario (avg. price of £90).
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London Heathrow (LHR) is currently the most popular flight destination from Ontario (average return price of £358).
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Price to beat on a round-trip flight from Ontario.
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Price to beat on a one-way flight from Ontario.
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Find flights from Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Ontario
Explore the most affordable flight options available from Ontario. Find the lowest fares based on data from user searches, with prices last updated on 27 November 2025.

Mon 2/315:19ONT - EDI
2 stops15h 56mBritish Airways
Mon 9/319:20EDI - ONT
2 stops33h 47mBritish Airways
Deal found 26/11£422
Tue 3/207:16ONT - EDI
2 stops22h 04mBritish Airways
Tue 24/210:55EDI - ONT
2 stops19h 56mBritish Airways
Deal found 25/11£426
Wed 14/116:45ONT - MAN
2 stops18h 00mBritish Airways
Wed 28/112:10MAN - ONT
2 stops18h 38mBritish Airways
Deal found 27/11£426
Tue 20/116:45ONT - MAN
2 stops16h 50mBritish Airways
Wed 28/109:50MAN - ONT
2 stops20h 58mBritish Airways
Deal found 25/11£430
Wed 31/1210:47ONT - MAN
2 stops21h 33mMultiple Airlines
Thu 15/105:40MAN - ONT
2 stops25h 08mMultiple Airlines
Deal found 25/11£431
Fri 16/116:45ONT - GLA
2 stops17h 15mBritish Airways
Fri 23/111:40GLA - ONT
2 stops19h 08mBritish Airways
Deal found 26/11£437
Wed 31/1216:47ONT - MAN
2 stops18h 53mBritish Airways
Thu 15/107:45MAN - ONT
2 stops22h 28mBritish Airways
Deal found 26/11£439
Tue 20/116:45ONT - LHR
1 stop12h 30mBritish Airways
Tue 3/215:00LHR - ONT
1 stop15h 48mBritish Airways
Deal found 25/11£446
Tue 24/217:06ONT - MAN
2 stops18h 24mBritish Airways
Wed 18/318:00MAN - ONT
2 stops35h 30mBritish Airways
Deal found 26/11£451
Mon 8/1206:40ONT - LHR
1 stop19h 50mKLM
Tue 23/1214:45LHR - ONT
1 stop16h 04mKLM
Deal found 26/11£451
Tue 24/213:15ONT - MAN
1 stop13h 15mMultiple Airlines
Wed 18/313:30MAN - ONT
1 stop29h 05mMultiple Airlines
Deal found 26/11£453
Tue 24/213:15ONT - LHR
1 stop14h 25mVirgin Atlantic
Tue 17/314:30LHR - ONT
1 stop15h 04mVirgin Atlantic
Deal found 26/11£453

Find flights from Ontario within your budget

 
Find flights departing from Ontario that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 27 November 2025. In the last 7 days, Cheapflights users made a total of 858,174 searches

Fly to

Heathrow

Route

Depart

Return

Price

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Mon 2/3

15:19-15:15

2 stops15h 56m

Edinburgh Turnhouse

Mon 9/3

19:20-22:07

2 stops33h 47m

£422

OntarioManchester

ONT - MAN

ONTMAN

Ontario

Wed 18/2

17:06-18:45

2 stops17h 39m

Manchester

Wed 25/2

12:10-22:51

2 stops18h 41m

£430

OntarioManchester

ONT - MAN

ONTMAN

Ontario

Tue 20/1

16:45-17:35

2 stops16h 50m

Manchester

Wed 28/1

09:50-22:48

2 stops20h 58m

£430

OntarioManchester

ONT - MAN

ONTMAN

Ontario

Wed 31/12

10:47-16:20

2 stops21h 33m

Manchester

Thu 15/1

05:40-22:48

2 stops25h 08m

£431

OntarioGlasgow

ONT - GLA

ONTGLA

Ontario

Fri 23/1

16:45-18:00

2 stops17h 15m

Glasgow Intl

Fri 30/1

11:40-22:48

2 stops19h 08m

£437

OntarioGlasgow

ONT - GLA

ONTGLA

Ontario

Fri 16/1

16:45-18:00

2 stops17h 15m

Glasgow Intl

Fri 23/1

11:40-22:48

2 stops19h 08m

£437

OntarioManchester

ONT - MAN

ONTMAN

Ontario

Tue 24/2

13:15-10:30

1 stop13h 15m

Manchester

Wed 18/3

13:30-11:35

1 stop29h 05m

£453

OntarioManchester

ONT - MAN

ONTMAN

Ontario

Tue 13/1

16:45-18:45

2 stops18h 00m

Manchester

Tue 20/1

06:15-18:45

2 stops20h 30m

£454

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Wed 28/1

06:00-08:05

2 stops18h 05m

London Heathrow

Sun 1/2

08:40-21:05

2 stops20h 25m

£458

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Fri 6/2

06:10-07:55

2 stops17h 45m

Edinburgh Turnhouse

Tue 10/2

09:25-20:58

2 stops19h 33m

£467

Flights are sorted by cheapest return flights first.

Deals found on 25/11

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Best time to book a flight from Ontario

Have a flexible travel schedule? Discover the best time to fly from 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.

Travel insights for flights from Ontario

Get recent, data-driven insights about flights from Ontario including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a return flight from Ontario to Heathrow. Price data was last updated on 21 November 2025.

Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ontario?

Currently, December is the cheapest month in which you can book a flight from Ontario (average of £355). Flying from Ontario in June will prove the most costly (average of £530). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

What are popular destinations to fly to from Ontario?

If you’re flying from Ontario, these routes are more frequently taken by airlines Seattle (104 flights per day), Dallas (78 flights per day) and Atlanta (67 flights per day).

Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From £103
Portland
Portland
From £66
Dallas/Fort Worth
Dallas/Fort Worth
From £143
San Francisco
San Francisco
From £645

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is Portland, with prices starting at £66. Explore other affordable destinations below.

Portland
Portland
From £66
Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From £103
Dallas/Fort Worth
Dallas/Fort Worth
From £143
New York
New York
From £339

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Related info for your journey

Access useful and relevant information related to your journey from Ontario. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 27 November 2025.

  • What are the most popular destinations to fly to from Ontario?

    This month, the top selected destinations from Ontario are Dallas/Fort Worth Airport, Denver, Guadalajara. Throughout the year, Dallas/Fort Worth Airport, Denver, Guadalajara are some of the top choices made by users flying from Ontario.

  • What is the cheapest flight from Ontario to anywhere?

    Users have flown out of Ontario for as low as £66 to Portland (prices may vary depending on the airline and departure time). On average, users have booked flights for £330 to fly from Ontario.

  • What is the cheapest month to fly from Ontario?

    At the present moment the cheapest month to fly from Ontario is currently December; with June being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

  • Where are the cheapest places to fly to from Ontario?

    Check out the cheapest flights from Ontario to embark to:
    Travel from Ontario to London from £446 round trip

  • How does Cheapflights help users find flights from Ontario?

    Deals for flights from Ontario are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

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

    It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ontario.

  • Can Cheapflights find flights from Ontario with no change fees?

    Yes! Cheapflights helps users easily find flights from Ontario with no change fees.

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

    Yes, Cheapflights has a feature called Price Alerts, which offers users the ability to be notified when flight prices change. Track prices for your flight from Ontario today and book when you’re ready!

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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 from Ontario?

Deals for flights from Ontario are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose to your preference, such as price, airport, cabin class, and plenty of other options.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ontario.

Can Cheapflights find flights from Ontario with no change fees?

Yes! Cheapflights helps users easily find flights from Ontario with no change fees.

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

Yes, Cheapflights has a feature called Price Alerts, which offers users the ability to be notified when flight prices change. Track prices for your flight from Ontario today and book when you’re ready!

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