£88+ 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 24/1. 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
24 Jan — 31 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 25 December 2025.

Cheapest one-way flight

£27

Cheapest round-trip flight

£162

Cheapest airline

Alaska Airlines

Most popular destination

Newark (EWR)

Good round-trip deal

£64 or less

Good one-way deal

£331 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 Honolulu.
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On average, Alaska Airlines currently has the cheapest one-way flight from Ontario (avg. price of £85).
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Newark (EWR) is currently the most popular flight destination from Ontario (average return price of £163).
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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 25 December 2025.

Wed 21/116:45ONT - EDI
2 stops16h 20mBritish Airways
Sun 25/109:15EDI - ONT
2 stops20h 58mBritish Airways
Deal found 24/12£451
Wed 21/106:00ONT - LHR
2 stops17h 05mVirgin Atlantic
Wed 28/106:30LHR - ONT
2 stops24h 21mVirgin Atlantic
Deal found 23/12£451
Sun 1/314:44ONT - EDI
2 stops16h 31mBritish Airways
Sat 7/314:05EDI - ONT
2 stops39h 02mBritish Airways
Deal found 25/12£452
Fri 27/217:06ONT - MAN
2 stops15h 29mBritish Airways
Thu 26/311:40MAN - ONT
2 stops19h 19mBritish Airways
Deal found 25/12£453
Wed 21/115:09ONT - MAN
2 stops15h 51mBritish Airways
Wed 18/209:50MAN - ONT
2 stops20h 29mBritish Airways
Deal found 24/12£455
Mon 23/215:19ONT - MAN
2 stops15h 51mBritish Airways
Wed 4/319:30MAN - ONT
2 stops34h 34mBritish Airways
Deal found 24/12£456
Wed 21/106:00ONT - LHR
1 stop20h 00mKLM
Wed 28/106:30LHR - ONT
2 stops22h 35mKLM
Deal found 23/12£463
Wed 21/115:09ONT - MAN
2 stops15h 51mBritish Airways
Wed 4/212:10MAN - ONT
2 stops18h 38mBritish Airways
Deal found 24/12£463
Thu 5/307:30ONT - LHR
1 stop19h 00mKLM
Thu 12/306:30LHR - ONT
2 stops17h 42mKLM
Deal found 24/12£466
Thu 22/106:00ONT - EDI
2 stops20h 40mDelta
Thu 29/105:50EDI - ONT
2 stops23h 15mDelta
Deal found 25/12£468
Wed 21/106:00ONT - LHR
2 stops20h 15mDelta
Wed 28/106:30LHR - ONT
2 stops24h 21mDelta
Deal found 23/12£469
Thu 5/306:00ONT - LHR
2 stops18h 45mDelta
Thu 12/306:30LHR - ONT
2 stops21h 34mDelta
Deal found 25/12£470

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 25 December 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

Sat 7/2

07:16-11:50

2 stops20h 34m

Edinburgh Turnhouse

Sat 14/2

14:05-22:04

2 stops39h 59m

£451

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Wed 21/1

16:45-17:05

2 stops16h 20m

Edinburgh Turnhouse

Sun 25/1

09:15-22:13

2 stops20h 58m

£451

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Fri 6/2

16:45-17:00

2 stops16h 15m

Edinburgh Turnhouse

Fri 13/2

09:55-22:04

2 stops20h 09m

£451

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Wed 21/1

16:45-17:05

2 stops16h 20m

Edinburgh Turnhouse

Mon 26/1

11:00-22:48

2 stops19h 48m

£451

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Thu 26/2

17:06-17:40

2 stops16h 34m

Edinburgh Turnhouse

Thu 5/3

08:35-22:04

2 stops21h 29m

£451

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Fri 23/1

16:45-17:00

2 stops16h 15m

Edinburgh Turnhouse

Fri 30/1

06:05-22:13

2 stops24h 08m

£451

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Tue 3/2

16:45-16:50

2 stops16h 05m

Edinburgh Turnhouse

Tue 10/2

10:00-22:48

2 stops20h 48m

£451

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

Sun 1/3

14:44-15:15

2 stops16h 31m

Edinburgh Turnhouse

Sat 7/3

14:05-21:07

2 stops39h 02m

£452

OntarioManchester

ONT - MAN

ONTMAN

Ontario

Fri 27/2

17:06-16:35

2 stops15h 29m

Manchester

Thu 26/3

11:40-23:59

2 stops19h 19m

£453

OntarioLondon

ONT - LHR

ONTLHR

Ontario

Thu 5/3

07:30-10:30

1 stop19h 00m

London Heathrow

Thu 12/3

06:30-17:12

2 stops17h 42m

£467

Flights are sorted by cheapest return flights first.

Deals found on 22/12

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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 19 December 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 £347). Flying from Ontario in June will prove the most costly (average of £517). 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 (112 flights per day), Dallas (102 flights per day) and Atlanta (89 flights per day).

Portland
Portland
From £64
San Francisco
San Francisco
From £630
New York
New York
From £331

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is Portland, with prices starting at £64. Explore other affordable destinations below.

Portland
Portland
From £64
New York
New York
From £331
San Francisco
San Francisco
From £630

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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 25 December 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 £64 to Portland (prices may vary depending on the airline and departure time). On average, users have booked flights for £348 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 £465 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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