£58+ 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 4/12. 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
29 Nov — 6 Dec1
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 30 October 2025.

Cheapest one-way flight

£33

Cheapest round-trip flight

£92

Cheapest airline

Alaska Airlines

Most popular destination

London Heathrow (LHR)

Good round-trip deal

£65 or less
The cheapest one-way flight from Ontario is currently to San Francisco.
Search Deals
The cheapest round-trip flight from Ontario is currently to San Francisco.
Search Deals
On average, Alaska Airlines currently has the cheapest one-way flight from Ontario (avg. price of £93).
Search Deals
London Heathrow (LHR) is currently the most popular flight destination from Ontario (average return price of £358).
Search Deals
Price to beat on a round-trip flight from Ontario.
Search Deals

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 30 October 2025.

Sat 29/1106:00ONT - YVR
1 stop7h 39mUnited Airlines
Tue 2/1215:00YVR - ONT
1 stop7h 49mUnited Airlines
Deal found 27/10£241
Wed 26/1106:45ONT - YVR
1 stop7h 58mDelta
Tue 2/1206:45YVR - ONT
1 stop5h 49mDelta
Deal found 30/10£253
Thu 20/1117:49ONT - YVR
1 stop6h 10mDelta
Tue 25/1106:15YVR - ONT
1 stop4h 51mDelta
Deal found 30/10£268
Mon 2/307:00ONT - YVR
2 stops17h 10mAlaska Airlines
Tue 3/306:00YVR - ONT
1 stop4h 39mAlaska Airlines
Deal found 27/10£274
Tue 23/1211:42ONT - YVR
1 stop6h 57mDelta
Tue 30/1206:00YVR - ONT
1 stop5h 02mDelta
Deal found 30/10£275
Tue 23/1206:38ONT - YVR
1 stop16h 25mDelta
Wed 31/1206:00YVR - ONT
1 stop6h 32mDelta
Deal found 30/10£287
Tue 18/1111:59ONT - YVR
1 stop6h 46mAlaska Airlines
Fri 21/1117:45YVR - ONT
1 stop6h 14mAlaska Airlines
Deal found 27/10£289
Mon 12/119:56ONT - YVR
2 stops16h 34mAlaska Airlines
Thu 15/106:00YVR - ONT
2 stops13h 16mAlaska Airlines
Deal found 29/10£296
Wed 26/1113:29ONT - YVR
1 stop7h 41mUnited Airlines
Sat 29/1108:45YVR - ONT
1 stop16h 37mUnited Airlines
Deal found 28/10£298
Mon 24/1118:38ONT - WAW
2 stops18h 52mUnited Airlines
Wed 3/1206:30WAW - ONT
2 stops20h 07mUnited Airlines
Deal found 30/10£376
Sun 22/313:49ONT - WAW
2 stops42h 26mUnited Airlines
Tue 7/406:40WAW - ONT
2 stops40h 54mUnited Airlines
Deal found 28/10£377
Sun 22/313:49ONT - WAW
2 stops48h 41mUnited Airlines
Fri 10/409:40WAW - ONT
2 stops38h 38mUnited Airlines
Deal found 28/10£377

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

Fly to

Heathrow

Route

Depart

Return

Price

OntarioVancouver

ONT - YVR

ONTYVR

Ontario

Sat 29/11

06:00-13:39

1 stop7h 39m

Vancouver Intl

Tue 2/12

15:00-22:49

1 stop7h 49m

£241

OntarioVancouver

ONT - YVR

ONTYVR

Ontario

Mon 2/3

07:00-18:45

2 stops11h 45m

Vancouver Intl

Tue 3/3

06:00-10:39

1 stop4h 39m

£274

OntarioVancouver

ONT - YVR

ONTYVR

Ontario

Sat 17/1

16:03-20:55

1 stop4h 52m

Vancouver Intl

Mon 19/1

06:00-10:59

1 stop4h 59m

£282

OntarioVancouver

ONT - YVR

ONTYVR

Ontario

Fri 5/12

12:13-20:55

1 stop8h 42m

Vancouver Intl

Sat 6/12

06:00-11:19

1 stop5h 19m

£282

OntarioVancouver

ONT - YVR

ONTYVR

Ontario

Tue 23/12

06:38-23:03

1 stop16h 25m

Vancouver Intl

Wed 31/12

06:00-12:32

1 stop6h 32m

£287

OntarioVancouver

ONT - YVR

ONTYVR

Ontario

Tue 18/11

11:59-18:45

1 stop6h 46m

Vancouver Intl

Fri 21/11

17:45-23:59

1 stop6h 14m

£289

OntarioVancouver

ONT - YVR

ONTYVR

Ontario

Wed 19/11

11:59-18:45

1 stop6h 46m

Vancouver Intl

Fri 21/11

19:35-23:59

1 stop4h 24m

£289

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 24/11

18:38-22:30

2 stops18h 52m

Warsaw Frederic Chopin

Wed 3/12

06:30-17:37

2 stops20h 07m

£376

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Mon 24/11

18:38-22:30

2 stops18h 52m

Warsaw Frederic Chopin

Thu 4/12

09:30-20:42

2 stops20h 12m

£376

OntarioWarsaw

ONT - WAW

ONTWAW

Ontario

Tue 24/3

13:45-22:30

2 stops24h 45m

Warsaw Frederic Chopin

Tue 7/4

14:15-12:19

2 stops31h 04m

£377

Flights are sorted by cheapest return flights first.

Deals found on 30/10

Showing 1-10 of 60 results
1
2
3
...
6

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 24 October 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, January is the cheapest month in which you can book a flight from Ontario (average of £330). Flying from Ontario in June will prove the most costly (average of £529). 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 Dallas (71 flights per day), Seattle (69 flights per day) and Atlanta (54 flights per day).

Portland
Portland
From £65
Dallas/Fort Worth
Dallas/Fort Worth
From £220
Phoenix Sky Harbor Intl
Phoenix Sky Harbor Intl
From £190
San Francisco
San Francisco
From £644

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 £190
Dallas/Fort Worth
Dallas/Fort Worth
From £220
San Francisco
San Francisco
From £644

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.

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 30 October 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 £399 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 January; 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 £452 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!

See more FAQs

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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

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.