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£68+ 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 24/2. 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
26 Feb — 5 Mar1
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 January 2026.

Cheapest one-way flight

£24

Cheapest round-trip flight

£37

Cheapest airline

Alaska Airlines

Most popular destination

London Heathrow (LHR)

Good round-trip deal

£63 or less

Good one-way deal

£327 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 £83).
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London Heathrow (LHR) is currently the most popular flight destination from Ontario (average return price of £390).
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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 January 2026.

Wed 6/508:30
ONT
-
HNL
Nonstop6h 05m
Alaska Airlines
Wed 13/513:31
HNL
-
ONT
Nonstop5h 36m
Alaska Airlines
Deal found 26/1£225
Tue 24/208:41
ONT
-
HNL
Nonstop6h 04m
Alaska Airlines
Tue 3/314:40
HNL
-
ONT
Nonstop5h 35m
Alaska Airlines
Deal found 26/1£228
Tue 3/306:10
ONT
-
HNL
1 stop9h 09m
United Airlines
Tue 10/307:00
HNL
-
ONT
1 stop7h 41m
United Airlines
Deal found 25/1£231
Thu 16/408:32
ONT
-
HNL
Nonstop6h 03m
Alaska Airlines
Tue 21/414:25
HNL
-
ONT
Nonstop5h 34m
Alaska Airlines
Deal found 26/1£232
Sun 22/208:41
ONT
-
HNL
Nonstop6h 04m
Alaska Airlines
Tue 24/214:40
HNL
-
ONT
Nonstop5h 35m
Alaska Airlines
Deal found 26/1£234
Wed 25/212:02
ONT
-
HNL
1 stop12h 04m
Multiple Airlines
Mon 2/314:40
HNL
-
ONT
Nonstop5h 35m
Multiple Airlines
Deal found 26/1£235
Fri 6/308:41
ONT
-
HNL
Nonstop6h 04m
Hawaiian Airlines
Mon 9/312:20
HNL
-
ONT
Nonstop5h 35m
Hawaiian Airlines
Deal found 26/1£236
Fri 17/414:20
ONT
-
HNL
1 stop10h 00m
Delta
Wed 6/522:45
HNL
-
ONT
1 stop11h 04m
Delta
Deal found 26/1£238
Fri 1/508:30
ONT
-
HNL
Nonstop6h 05m
Alaska Airlines
Mon 4/512:35
HNL
-
ONT
Nonstop5h 35m
Alaska Airlines
Deal found 26/1£239
Sun 8/308:45
ONT
-
HNL
Nonstop6h 04m
Alaska Airlines
Wed 11/312:20
HNL
-
ONT
Nonstop5h 35m
Alaska Airlines
Deal found 27/1£241
Fri 6/308:41
ONT
-
HNL
Nonstop6h 04m
Alaska Airlines
Tue 10/312:20
HNL
-
ONT
Nonstop5h 35m
Alaska Airlines
Deal found 26/1£242
Wed 25/214:39
ONT
-
EDI
2 stops16h 31m
British Airways
Fri 6/310:55
EDI
-
ONT
2 stops21h 04m
British Airways
Deal found 26/1£447

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 January 2026. In the last 7 days, Cheapflights users made a total of 858,174 searches

Fly to

Heathrow

Route

Depart

Return

Price

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Tue 10/3

08:45-11:49

Nonstop6h 04m

Honolulu

Tue 17/3

12:20-20:55

Nonstop5h 35m

£228

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Wed 25/2

08:41-12:45

Nonstop6h 04m

Honolulu

Fri 27/2

14:40-22:15

Nonstop5h 35m

£234

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Thu 23/4

15:26-22:29

1 stop10h 03m

Honolulu

Mon 27/4

12:35-21:10

Nonstop5h 35m

£235

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Mon 27/4

06:00-21:20

2 stops18h 20m

Honolulu

Wed 6/5

22:45-12:49

1 stop11h 04m

£236

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Fri 6/3

08:41-12:45

Nonstop6h 04m

Honolulu

Mon 9/3

12:20-20:55

Nonstop5h 35m

£242

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Fri 6/3

08:41-12:45

Nonstop6h 04m

Honolulu

Tue 10/3

12:20-20:55

Nonstop5h 35m

£242

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Wed 15/4

11:05-19:49

2 stops11h 44m

Honolulu

Fri 17/4

07:00-22:45

2 stops12h 45m

£260

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Wed 8/4

08:32-11:35

Nonstop6h 03m

Honolulu

Tue 14/4

14:25-22:59

Nonstop5h 34m

£260

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Mon 23/2

11:00-21:00

2 stops12h 00m

Honolulu

Thu 26/2

06:25-19:15

2 stops10h 50m

£268

OntarioHonolulu

ONT - HNL

ONTHNL

Ontario

Sun 1/3

08:41-12:45

Nonstop6h 04m

Honolulu

Thu 5/3

13:21-23:52

1 stop8h 31m

£271

Flights are sorted by cheapest return flights first.

Deals found on 26/1

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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 23 January 2026.

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 £343). Flying from Ontario in June will prove the most costly (average of £511). 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 (97 flights per day), Seattle (87 flights per day) and Phoenix (71 flights per day).

Portland
Portland
From £63
New York
New York
From £327

What is the cheapest place to fly to from Ontario?

The cheapest city to fly to from Ontario is Portland, with prices starting at £63. Explore other affordable destinations below.

Portland
Portland
From £63
New York
New York
From £327

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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 January 2026.

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

    This month, the top selected destinations from Ontario are Guadalajara, Dallas/Fort Worth Airport, Honolulu. 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 £63 to Portland (prices may vary depending on the airline and departure time). On average, users have booked flights for £195 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 £461 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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