£165 Find Cheap Flights from Cardiff to Ontario – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Cardiff to Ontario departing on 22/9. 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.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Cardiff to Ontario

Cheapest return prices found by our users on KAYAK in the last 72 hours
Ottawa
Ottawa1 stop£679
London
London3 stops£838
Ottawa
Ottawa1 stop£679
London
London3 stops£838

Book Cheap Cardiff to Ontario Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Cardiff to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Cardiff to Ontario

Tue, 22 Sep - Wed, 30 Sep
Multiple Airlines Logo
23:15 - 15:00
CWL
-
YYZ
20h 45m
2 stops
Multiple Airlines Logo
21:35 - 22:25
YYZ
-
CWL
19h 50m
1 stop
£347Multiple Airlines
Tue, 8 Sep - Tue, 15 Sep
Multiple Airlines Logo
23:15 - 13:20
CWL
-
YYZ
19h 05m
1 stop
Multiple Airlines Logo
21:35 - 23:25
YYZ
-
CWL
20h 50m
1 stop
£351Multiple Airlines
Tue, 8 Sep - Wed, 16 Sep
Multiple Airlines Logo
23:15 - 13:20
CWL
-
YYZ
19h 05m
1 stop
Multiple Airlines Logo
21:55 - 22:25
YYZ
-
CWL
19h 30m
2 stops
£360Multiple Airlines
Thu, 27 Aug - Mon, 7 Sep
Multiple Airlines Logo
22:50 - 14:55
CWL
-
YYZ
21h 05m
1 stop
Multiple Airlines Logo
21:35 - 22:50
YYZ
-
CWL
20h 15m
1 stop
£362Multiple Airlines
Thu, 27 Aug - Fri, 4 Sep
WestJet Logo
11:35 - 14:45
CWL
-
YYZ
8h 10mdirect
WestJet Logo
22:10 - 10:15
YYZ
-
CWL
7h 05mdirect
£387WestJet
Sat, 5 Sep - Fri, 11 Sep
WestJet Logo
11:35 - 14:45
CWL
-
YYZ
8h 10mdirect
WestJet Logo
22:10 - 10:15
YYZ
-
CWL
7h 05mdirect
£414WestJet
Thu, 10 Sep - Fri, 11 Sep
WestJet Logo
11:35 - 14:45
CWL
-
YYZ
8h 10mdirect
WestJet Logo
22:10 - 10:15
YYZ
-
CWL
7h 05mdirect
£420WestJet
Wed, 23 Sep - Wed, 7 Oct
KLM Logo
09:45 - 19:15
CWL
-
YYZ
14h 30m
1 stop
KLM Logo
21:05 - 16:45
YYZ
-
CWL
14h 40m
1 stop
£615KLM
Mon, 16 Nov - Mon, 23 Nov
KLM Logo
10:20 - 15:40
CWL
-
YYZ
10h 20m
1 stop
KLM Logo
18:30 - 17:00
YYZ
-
CWL
17h 30m
2 stops
£636KLM
Mon, 26 Oct - Sun, 1 Nov
KLM Logo
17:30 - 16:40
CWL
-
YYZ
27h 10m
1 stop
KLM Logo
17:55 - 09:50
YYZ
-
CWL
10h 55m
1 stop
£637KLM
Booking Insights

KAYAK's insights & trends for Cardiff to Ontario flights

Get data-powered insights and trends into flights from Cardiff to Ontario to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from Cardiff to Region of Ontario?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Cardiff to Region of Ontario departing in September.

Flight prices are below average for this route right now.

Flights to Region of Ontario from Cardiff usually cost between £433 and £637 in September.
The lowest price found in the past 5 days was £347 on Multiple Airlines (22 Sept–30 Sept).

What is the cheapest Cardiff to Ontario flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Ontario from Cardiff found in the last 5 days was to Toronto, at £321 return. The most popular route is from Cardiff (CWL) to Toronto Pearson Intl Airport (YYZ), and the cheapest return airline ticket found on this route in the last 5 days was £321.

What is the cheapest time of day to fly to Ontario?

The average price for all round-trip flights from Cardiff to Ontario depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Ontario is generally in the morning, when retur flights cost £494 on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is £494.

Can I save money by flying with a stopover from Cardiff to Ontario?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of £553, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Cardiff to Ontario?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Cardiff to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Cardiff to Ontario is March, when tickets cost £0 (return) on average. On the other hand, the most expensive months are December and April, when the average cost of return tickets is £788 and £709 respectively.

How far in advance should I book a flight from Cardiff to Ontario?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Cardiff to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on a flight from Cardiff to Ontario, you should book around 2 weeks before departure, which saves you about 21% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 3 weeks before departure.

Good to know - Cheap tickets from Cardiff to Ontario

Low season

July

Cheapest flight

£165
Best time to beat the crowds (35% less expensive on average)
Most popular time to fly and prices are also 33% lower on average.
Flight from Cardiff to Toronto

FAQs - booking Ontario flights

  • How does KAYAK find such low prices on flights from Cardiff to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Cardiff to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Cardiff to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Cardiff to Ontario is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Cardiff to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from Cardiff to Ontario with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Cardiff to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Cardiff to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many flights are there between Cardiff and Ontario per day?

    There is a maximum of 1 direct flight a day that takes off from Cardiff and lands in Ontario, with an average flight time of 8h 10m. The most common departure time is 11:00 and most flights take off in the morning. Each week, there are 4 flights.

Top tips for finding a cheap flight from Cardiff to Ontario

  • Looking for a cheap flight from Cardiff to Ontario? 25% of our users found tickets from Cardiff to Ontario for the following prices or less: Toronto £135 one-way - £431 round-trip

Reviews of the top airlines flying from Cardiff to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Cardiff to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Cardiff to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
KLMOverall score based on 1551 reviews
7.8Boarding
8.4Crew
7.3Food
7.7Comfort
7.2Entertainment
Airline reviews

The flight was 45 mins late leaving, we sat without a/c for some of this, 2nd Meal was a slice of pizza. Movies were good.

8.0 ExcellentAnonymous, Jun 2026
LHR - AMS
Read more KLM reviews

The flight was 45 mins late leaving, we sat without a/c for some of this, 2nd Meal was a slice of pizza. Movies were good.

Outstanding even though the 330 was one of the oldest in the fleet. The difference was the attentiveness and responsiveness of a really experienced flight attendant. For airline food great variety of interesting choices and good tastes supported by a good wine selection.

I’m grateful for the KLM Air France shuttle bus service to Ottawa. However due to construction and other issues related to the chaotic Uber pickup system at YUL, it’s a challenge to find the Kelios bus service to Ottawa. The signs are not clear or even available. No staff to guide passengers. It’s a stressful experience.

Flight was on time, staff are friendly and helpful onboard.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

Klm start boarding while somw air issue in the plan

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Good food. Excellent crew service. Clean aircraft. Narrow seats and isle.

It’s chaotic at the bus stop outside of the airport because of the Uber meeting point. You need to be alert and look for the KLM bus which is not branded or labeled. Incorrect information was provided to go to gate 28, when in fact the bus was at gate 27. On the plus side the bus left early and arrived early to Ottawa.

Great flight because I upgraded to Premium Comfort. Made a huge difference in the experience.

Westjet never disappoint always terrible small plane ,crowded cheap snack if you can call it snack

Westjet was late and we missed our connecting flight with Cathay. Had to wait 8 hours. Westjet only allows 1 checked in baggage for international flights- it’s always been 2. Canada allows only 1 sandwhich bag size full off small liquids. Everything else will be tossed. Awful trip. Will never fly west jet or go to Toronto to connect flights!

I didn’t have any food but my Prosecco hit the spot. We left on time and the crew was friendly.

I thought the coffee was excellent! The wait for the luggage was acceptable.. It left and arrived on time. My son found that his device worked very well and he really enjoyed his flight! The stewardess moved him up to the emergency exit and he very much appreciated that!

I wasn’t able to book or pay for a seat and they forgot to check me in for my third flight so I spent 24 hours in Toronto waiting for another one.

Everything was good except for flight delay, but it was because of the snow storm in the arrival airport.

The flight was cancelled less than 24 hours before departure. The alternate flight was a day later going from Grenada to Toronto to Vancouver to Calgary to Montreal. 2 days in the air. Not serious, Very bad service

I like the wider seats, Plus lots of legroom, Lacking entertainment, no tv or screen to play with

Liked in-flight wifi Did not like - nothing to complain, really. All good

The keg from Edmonton to Toronto My wife found it very cold. Other than that great flight.

Everything you need to know for your flight from Cardiff to Ontario

Information on your arrival and departure airports