$326 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 8/2. 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.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Ontario to Portugal

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Lisbon
Lisbon2 stops$620
Porto
Porto2 stops$707
Lisbon
Lisbon2 stops$620
Porto
Porto2 stops$707

Book Cheap Ontario to Portugal Plane Tickets

 
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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Portugal

Tue, Apr 28 - Tue, May 5
Delta Logo
11:53 am - 5:50 pm
ONT
-
LIS
21h 57m
2 stops
Delta Logo
5:00 am - 10:37 pm
LIS
-
ONT
25h 37m
2 stops
$620Delta
Sat, Apr 25 - Fri, May 8
KLM Logo
7:05 am - 8:00 am
ONT
-
LIS
16h 55m
2 stops
KLM Logo
5:00 am - 5:10 pm
LIS
-
ONT
20h 10m
2 stops
$661KLM
Wed, Apr 8 - Wed, Apr 15
Lufthansa Logo
1:34 pm - 10:45 pm
ONT
-
LIS
25h 11m
2 stops
Lufthansa Logo
5:05 am - 5:47 pm
LIS
-
ONT
20h 42m
2 stops
$676Lufthansa
Sun, Aug 9 - Thu, Aug 20
United Airlines Logo
5:45 am - 8:20 am
ONT
-
LIS
18h 35m
2 stops
United Airlines Logo
10:25 am - 9:59 pm
LIS
-
ONT
19h 34m
2 stops
$692United Airlines
Fri, Apr 24 - Fri, May 1
Lufthansa Logo
7:00 am - 1:40 pm
ONT
-
LIS
22h 40m
2 stops
Lufthansa Logo
12:20 pm - 10:35 pm
LIS
-
ONT
18h 15m
2 stops
$695Lufthansa
Tue, Apr 28 - Tue, May 5
Delta Logo
11:53 am - 10:05 pm
ONT
-
OPO
26h 12m
2 stops
Delta Logo
5:00 am - 11:44 pm
OPO
-
ONT
26h 44m
2 stops
$707Delta
Tue, Apr 28 - Tue, May 5
United Airlines Logo
6:05 am - 8:20 am
ONT
-
LIS
18h 15m
2 stops
United Airlines Logo
11:25 am - 10:35 pm
LIS
-
ONT
43h 10m
2 stops
$711United Airlines
Sat, Aug 1 - Fri, Aug 21
United Airlines Logo
5:45 am - 8:20 am
ONT
-
LIS
18h 35m
2 stops
United Airlines Logo
10:25 am - 10:58 pm
LIS
-
ONT
20h 33m
2 stops
$737United Airlines
Sat, Sep 5 - Tue, Oct 13
Air Canada Logo
7:13 pm - 7:00 am
ONT
-
OPO
51h 47m
2 stops
Air Canada Logo
12:15 pm - 12:20 pm
OPO
-
ONT
32h 05m
2 stops
$819Air Canada
Sun, Aug 9 - Fri, Aug 14
Air Canada Logo
6:39 pm - 8:20 am
ONT
-
PDL
54h 41m
2 stops
Air Canada Logo
9:35 am - 8:52 pm
PDL
-
ONT
18h 17m
2 stops
$2,637Air Canada
Booking Insights

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.

Which airlines provide the cheapest flights from Ontario to Portugal?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Portugal were found on United Airlines ($692) and Delta ($707).

Good to know

Low seasonMarch
Cheapest flight$326
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from Ontario to Porto

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.

Reviews of the top airlines flying 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.
7.9
DeltaOverall score based on 8293 reviews
7.9Comfort
8.1Boarding
8.5Crew
7.8Entertainment
7.2Food
Airline reviews

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

2.0 MediocreIsabella, Mar 2026
SJC - SLC
Read more Delta reviews

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

The crew, and fellow passengers, were super gracious and kind. There seemed to be plenty of bin space even though the plane was full. It’s nice to get a glass of wine with dinner in Premiere seating, and there was a lot of food.

Everything I mentioned earlier - the airbus was more comfortable indeed and the experience was further enhanced.

The plane was an older model, so it wasn’t as comfortable as others. The flight attendants were not helpful during onboarding. It was a full flight so there was chaos finding space for baggage.

Awesome! On time flight, early arrival, and a complimentary upgrade!

It was nt delta. It was aeromexo. Service was awful. They served a very small drink and NO snack for a 3hr and 35min flight. Then for the first 30 min of the flight is was talk and talk over head interruption the movie/ show i picked to watch.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

The flight was delayed for about 2 hrs. Other than it, it was good.

The 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

We had turbulence ever 1/2 hr or so and the captains announcements were SOOOO LOUD

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

it was a very short flight so my expectations were low.

Entertainment kept turning itself off. Gave up on watching a movie.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

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

Information on your arrival and departure airports