£87+ 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 30/12. 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
17 gen — 24 gen1
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 18 dicembre 2025.

Cheapest one-way flight

£27

Cheapest round-trip flight

£122

Cheapest airline

Alaska Airlines

Most popular destination

Newark (EWR)

Good round-trip deal

£65 or less

Good one-way deal

£147 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 Dallas/Fort Worth.
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On average, Alaska Airlines currently has the cheapest one-way flight from Ontario (avg. price of £88).
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Newark (EWR) is currently the most popular flight destination from Ontario (average return price of £168).
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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 18 dicembre 2025.

gio 15/116:45ONT - EDI
2 stops18h 00mBritish Airways
gio 22/109:25EDI - ONT
2 stops20h 48mBritish Airways
Deal found 15/12£456
mer 4/215:09ONT - MAN
2 stops15h 51mBritish Airways
mer 4/312:10MAN - ONT
2 stops18h 39mBritish Airways
Deal found 17/12£461
gio 29/105:05ONT - EDI
2 stops18h 50mUnited Airlines
gio 5/209:25EDI - ONT
2 stops20h 33mUnited Airlines
Deal found 15/12£464
mer 31/1210:47ONT - MAN
2 stops19h 08mAmerican Airlines
gio 15/105:40MAN - ONT
2 stops19h 42mAmerican Airlines
Deal found 17/12£464
ven 13/214:44ONT - EDI
2 stops19h 41mAmerican Airlines
lun 23/207:25EDI - ONT
2 stops19h 14mAmerican Airlines
Deal found 15/12£467
mer 14/115:09ONT - MAN
2 stops15h 51mBritish Airways
lun 19/120:05MAN - ONT
2 stops30h 40mBritish Airways
Deal found 17/12£468
mar 14/406:00ONT - EDI
2 stops17h 20mAir Canada
mer 22/409:00EDI - ONT
2 stops43h 46mAir Canada
Deal found 16/12£468
mar 3/306:10ONT - LHR
1 stop16h 40mIberia
mar 10/306:00LHR - ONT
2 stops23h 48mIberia
Deal found 17/12£468
mer 25/215:19ONT - MAN
2 stops17h 01mBritish Airways
lun 23/320:05MAN - ONT
2 stops30h 40mBritish Airways
Deal found 17/12£470
mer 14/113:11ONT - LHR
1 stop12h 49mDelta
mer 21/106:30LHR - ONT
2 stops22h 35mDelta
Deal found 17/12£470
mar 13/107:30ONT - LHR
1 stop20h 25mDelta
mar 20/106:30LHR - ONT
2 stops22h 35mDelta
Deal found 16/12£471
mer 22/412:55ONT - MAN
2 stops18h 40mBritish Airways
mar 28/407:55MAN - ONT
2 stops22h 01mBritish Airways
Deal found 16/12£472

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 18 dicembre 2025. In the last 7 days, Cheapflights users made a total of 858,174 searches

Fly to

Heathrow

Route

Depart

Return

Price

OntarioGlasgow

ONT - GLA

ONTGLA

Ontario

ven 20/2

17:06-18:00

2 stops16h 54m

Glasgow Intl

gio 26/2

20:20-22:04

2 stops33h 44m

£454

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

dom 1/2

15:09-15:15

2 stops16h 06m

Edinburgh Turnhouse

gio 12/2

06:50-22:04

2 stops23h 14m

£456

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

gio 15/1

16:45-18:45

2 stops18h 00m

Edinburgh Turnhouse

gio 22/1

09:25-22:13

2 stops20h 48m

£456

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

ven 16/1

16:45-18:25

2 stops17h 40m

Edinburgh Turnhouse

ven 23/1

07:25-22:13

2 stops22h 48m

£456

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

sab 31/1

07:16-10:10

2 stops18h 54m

Edinburgh Turnhouse

sab 7/2

14:05-22:13

2 stops40h 08m

£456

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

ven 13/2

17:06-18:25

2 stops17h 19m

Edinburgh Turnhouse

sab 21/2

16:10-22:04

2 stops37h 54m

£456

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

gio 29/1

05:05-07:55

2 stops18h 50m

Edinburgh Turnhouse

gio 5/2

09:25-21:58

2 stops20h 33m

£464

OntarioManchester

ONT - MAN

ONTMAN

Ontario

mer 31/12

10:47-13:55

2 stops19h 08m

Manchester

gio 15/1

05:40-17:22

2 stops19h 42m

£464

OntarioEdinburgh

ONT - EDI

ONTEDI

Ontario

mar 14/4

06:00-07:20

2 stops17h 20m

Edinburgh Turnhouse

mer 22/4

09:00-20:46

2 stops43h 46m

£468

OntarioManchester

ONT - MAN

ONTMAN

Ontario

gio 22/1

12:41-10:30

1 stop13h 49m

Manchester

mar 27/1

13:00-11:31

2 stops30h 31m

£469

Flights are sorted by cheapest return flights first.

Deals found on 16/12

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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 12 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 £351). Flying from Ontario in June will prove the most costly (average of £522). 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 Atlanta (72 flights per day), Seattle (58 flights per day) and Dallas (40 flights per day).

Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From £137
Portland
Portland
From £65
San Francisco
San Francisco
From £637
New York
New York
From £334

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is Portland, with prices starting at £65. Explore other affordable destinations below.

Portland
Portland
From £65
Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From £137
New York
New York
From £334
San Francisco
San Francisco
From £637

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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 18 dicembre 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 £65 to Portland (prices may vary depending on the airline and departure time). On average, users have booked flights for £358 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 £470 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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