$426 Find Cheap Flights from Ontario to Portugal

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Portugal departing on 7/5. 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.
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Best Portugal Flight Deals from Ontario

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Lisbon
Lisbon2 stops$666
Porto
Porto2 stops$802
Lisbon
Lisbon2 stops$666
Porto
Porto2 stops$802

Cheap Flight Deals from Ontario to Portugal (ONT-PT0)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Portugal 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.

Recent round-trip flight deals from Ontario to Portugal

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Ontario to Portugal.
Discover the best prices for you by selecting your travel dates on KAYAK.
United Airlines Logo
6:38 pm - 9:20 amONT-LIS
54h 42m2 stops
United Airlines Logo
11:55 am - 8:17 pmLIS-ONT
40h 22m2 stops
$666United Airlines
Find Deal
Sat, Oct 11 - Fri, Nov 21
United Airlines Logo
9:35 am - 9:20 amONT-LIS
15h 45m2 stops
United Airlines Logo
10:15 am - 10:35 pmLIS-ONT
19h 20m2 stops
$717United Airlines
Find Deal
Tue, Oct 14 - Wed, Oct 29
British Airways Logo
5:02 pm - 11:10 pmONT-LIS
22h 08m2 stops
British Airways Logo
6:45 pm - 5:45 pmLIS-ONT
31h 00m2 stops
$813British Airways
Find Deal
Mon, Oct 6 - Mon, Oct 13
Air Canada Logo
1:34 pm - 11:05 amONT-LIS
37h 31m2 stops
Air Canada Logo
12:50 pm - 5:25 pmLIS-ONT
36h 35m2 stops
$818Air Canada
Find Deal
Mon, Jun 30 - Wed, Jul 9
Delta Logo
7:00 am - 8:00 amONT-LIS
17h 00m2 stops
Delta Logo
10:00 am - 10:41 pmLIS-ONT
20h 41m2 stops
$827Delta
Find Deal
Sun, Aug 31 - Tue, Sep 9
Iberia Logo
3:00 pm - 8:05 pmONT-LIS
21h 05m2 stops
Iberia Logo
9:00 am - 12:02 amLIS-ONT
23h 02m2 stops
$921Iberia
Find Deal
Mon, Sep 29 - Wed, Oct 8
Delta Logo
5:08 pm - 6:40 pmONT-LIS
17h 32m2 stops
Delta Logo
11:40 am - 11:42 pmLIS-ONT
20h 02m2 stops
$939Delta
Find Deal
Wed, Jul 2 - Wed, Jul 9
Iberia Logo
3:00 pm - 3:55 pmONT-OPO
16h 55m2 stops
Iberia Logo
12:20 pm - 11:36 pmOPO-ONT
19h 16m2 stops
$952Iberia
Find Deal
Wed, Sep 3 - Thu, Sep 25
British Airways Logo
3:00 pm - 5:45 pmONT-LIS
19h 45m2 stops
British Airways Logo
12:30 pm - 5:49 pmLIS-ONT
37h 19m2 stops
$1,488British Airways
Find Deal
Sun, Oct 26 - Mon, Nov 10
Air Canada Logo
5:05 am - 9:20 amONT-LIS
20h 15m2 stops
Air Canada Logo
11:25 am - 8:54 pmLIS-ONT
17h 29m2 stops
$1,683Air Canada
Find Deal
Wed, Jul 2 - Tue, Jul 8
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KAYAK's insights & trends for Ontario to Portugal flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Portugal, 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 Ontario to Portugal is March, when tickets cost $708 (return) on average. On the other hand, the most expensive months are February and July, when the average cost of round-trip tickets is $2,482 and $1,765 respectively.

What’s the cheapest day of the week to fly from Ontario to Portugal?

The average price of all round-trip flights from Ontario to Portugal clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Portugal on a Tuesday and more expensive on a Saturday. On your return trip to Ontario, you should consider flying back on a Thursday, and avoid Tuesdays for better deals.


Good to know

Low seasonAugust
High seasonJune
Cheapest flight$426
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from Ontario to Lisbon

FAQs - booking Portugal flights

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

    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 Ontario to Portugal.

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

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

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Ontario to Portugal 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 Ontario to Portugal?

    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 Ontario to Portugal up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Portugal?

    The cheapest time of day to fly to Portugal is generally in the evening, when round-trip flights cost $1,054 on average. Morning departures are around 5% more expensive than evening flights, on average. The most expensive time of day to fly to Portugal is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,230.

Top 3 airlines serving from Ontario to Portugal

Need help choosing which airline to fly with from Ontario to Portugal? 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.
8.0
DeltaOverall score based on 7936 reviews
7.9Comfort
8.2Boarding
7.9Entertainment
7.3Food
8.5Crew
Airline reviews

Delta flight was on time, seats were comfortable, and crew was nice.

8.0 ExcellentAnonymous, Apr 2025LAX - DEN
Read more Delta reviews

Delta flight was on time, seats were comfortable, and crew was nice.

Bathrooms dirty sinks clogged. No one seemed to clean them. Plane very old

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

Horrible. Grateful to be alive but spent 13 hours at airport only to return back to my familys house and flight changed to next day. They tried to fix a part on plane, had no back up plane and after 10 hours , reattempted the flight and it STILL wasn't fixed. We got a meal voucher and rescheduled flight but there should be some other compensation for the 15 hours spent in airport

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

The gate was too far away for the connecting flight

Compared with other carriers business class for an overnight was not worth the extra expense.

Seats were comfortable. It’s was so cold and very uncomfortable. I paid 2000 miles for wifi service that was choppy the whole flight. Would like to be reimbursed for my miles Food was so disappointing. Three cold and terrible meals for $3000 round trip. This needs to be better.

Easy to board. Flight was super crowded though so I didn't sleep well on that cross country red-eye flight. The aisles seem ot have gotten narrower and the seat smaller whn luggage and people are getting bigger so it would be AWESOME to have more space and breathing room in general ;)

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

Plenty of room for me and the cat in Premium Economy. Seat was comfortable. Boarding was a breeze. The lady at the special check-in desk was great, super helpful and professional.

Smooth flight. As always dinner could have been more generous. Breakfast was great.

AWFUL. I have had the experience of traveling with many airlines across the world, and hands down United Airlines is the worst. Not one flight was on time, and I don’t think I met one crew member or staff member who wasn’t rude.

Old and out of date plane, it seem like every time I fly with united there’s and issue. We were delayed,

Short flight so no food or entertainment. Good landing at SFO and on time. We were told no carryon luggage yet lots of people were puting bags in overhead compartments. The rules need to be made more clear. I was on the first leg of an international flight and this is the first time I could not have carryon luggage.

Poor air traffic controller staffing led to a 50%reduction on flights so we got to wait 4 hrs for our flight! Very disorganized at the gate Poor communication with customers

No Charging ports for personal electronics, which were required to use wifi entertainment.

They are a great airline, and i enjoying flying with them. However my experience with booking through Kayak was a horrible experience. With all the restrictions and glitches of website. My entire bookings by kayak was wrong. And there was no possible way of fixing anything with them, because they hand over responsibility to the airline after purchase is made. Will not be booking through Kayak again and will inform my family and friends not to as well.

I liked nothing about this flight nor the incredible lack of service and communication on this flight from the Captain to every staff member. Arrogant, entitled and lacking any kind of basic customer service

I booked my flight ni November and was placed on standby? How does this happen. Flight was 1 1/2 hours late departure plane was switched to a smaller plane easy to tell this is a government run company they don’t care about anyone

Plane was old, cabin was small, overhead bins were small, seats really uncomfortable, no seat-back entertainment

Excellent crew, great food despite catering issues. We need more people like this.

1. The PA system was painfully loud. 2. Overhead bin #33 was missing—I find this troubling.

I had a disappointing experience at the San Diego airport with one of your gate agents. Despite being in Zone 4 and traveling with a standard carry-on bag that has never been an issue (30 flights in Q4 alone), the tall, blonde gentleman forced me to gate-check my bag. When I politely asked if we could verify the bag’s size, he became confrontational, even threatening to deny me boarding twice. His behavior appeared erratic and unprofessional, projecting a negative attitude onto passengers, as if he was going through something mentally. Notably, there was ample overhead space once all passengers had boarded. In contrast, the tall, older Asian agent handled the situation with professionalism and calmness, making a clear effort to de-escalate. As an avid traveler, this unnecessary inconvenience set a frustrating tone for my trip to Asia.

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

Information on your arrival and departure airports

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