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£71+ Direct flights from Ontario

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/5. 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
21 May — 28 May1
1 adult
1 adult, Economy, 0 bags

Find direct flights from Ontario within your budget

 
Use the slider to find direct flights from Ontario within your budget. Price data is based on user searches made on Cheapflights. Over the past seven days, Cheapflights users made 858,174 searches. This data was last updated on 21 April 2026.

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 9/5

05:40-06:55

Nonstop1h 15m

Phoenix Sky Harbor Intl

Tue 26/5

13:55-15:05

Nonstop1h 10m

£131

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 7/5

15:00-16:20

Nonstop1h 20m

Phoenix Sky Harbor Intl

Mon 11/5

20:05-21:15

Nonstop1h 10m

£131

OntarioDenver

ONT - DEN

ONTDEN

Ontario

Sat 23/5

05:00-08:20

Nonstop2h 20m

Denver Intl

Tue 26/5

19:20-20:42

Nonstop2h 22m

£154

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 16/5

05:40-06:55

Nonstop1h 15m

Phoenix Sky Harbor Intl

Sat 23/5

19:05-20:15

Nonstop1h 10m

£161

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 16/6

19:20-20:35

Nonstop1h 15m

Phoenix Sky Harbor Intl

Sat 20/6

12:30-13:40

Nonstop1h 10m

£161

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 20/5

14:25-15:40

Nonstop1h 15m

Phoenix Sky Harbor Intl

Fri 22/5

20:05-21:15

Nonstop1h 10m

£161

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 23/6

19:20-20:35

Nonstop1h 15m

Phoenix Sky Harbor Intl

Fri 26/6

22:55-00:05

Nonstop1h 10m

£161

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 1/6

05:15-06:30

Nonstop1h 15m

Phoenix Sky Harbor Intl

Wed 3/6

10:40-11:55

Nonstop1h 15m

£168

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 29/5

15:00-16:20

Nonstop1h 20m

Phoenix Sky Harbor Intl

Tue 2/6

10:40-11:55

Nonstop1h 15m

£182

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 9/5

08:40-09:55

Nonstop1h 15m

Phoenix Sky Harbor Intl

Tue 12/5

10:40-11:55

Nonstop1h 15m

£183

Flights are sorted by cheapest return flights first.

Deals found on 19/4

Showing 1-10 of 60 resultsSorted by cheapest first
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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.

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 21 April 2026.

  • Where can you fly direct from Ontario?

    Currently, the most popular direct flight destination from Ontario is Portland.

  • How much are direct flights from Ontario?

    On average, a one-way direct flight from Ontario will cost users approximately £149. If you're looking for a direct round-trip flight from Ontario, you can expect to pay around £205.

  • How long is a direct flight from Ontario?

    While the flight duration depends heavily on the destination, on average, travelers can expect non-stop flights from Ontario to last approximately 9h 24m on average. The quickest direct flight from Ontario at this time departs from Ontario (9h 24m), while the longest leaves from Ontario (9h 24m).

  • What is the best time of year to fly direct from Ontario?

    If you're seeking the lowest price on a direct flight from Ontario, October is worth consideration as prices are at their lowest, on average. In terms of the number of daily non-stop flights, February offers travelers the most options.

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