HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Lisbon

$374+ Cheap flights from Ontario (ONT) to Lisbon (LIS)

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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
Jun 5 — Jun 121
Fri 6/5
Fri 6/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Lisbon with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Lisbon

Cheapest flights from Ontario to Lisbon
Explore the most affordable flight options available from Ontario to Lisbon. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 6, 2026.

This United Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:02 am
ONT
-
LIS
2 stops19h 08m
United Airlines
Wed 11/186:10 am
LIS
-
ONT
2 stops22h 10m
United Airlines
Deal found 5/2$833
This United Airlines deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:02 am
ONT
-
LIS
2 stops18h 08m
United Airlines
Fri 11/2710:15 am
LIS
-
ONT
2 stops20h 11m
United Airlines
Deal found 5/2$843
This United Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:02 am
ONT
-
LIS
2 stops19h 08m
United Airlines
Wed 11/46:10 am
LIS
-
ONT
2 stops22h 10m
United Airlines
Deal found 5/3$883
This Delta deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/301:00 pm
ONT
-
LIS
2 stops19h 10m
Delta
Fri 11/65:30 am
LIS
-
ONT
2 stops18h 42m
Delta
Deal found 4/30$889
This United Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/297:00 am
ONT
-
LIS
2 stops18h 10m
United Airlines
Fri 11/610:15 am
LIS
-
ONT
2 stops20h 11m
United Airlines
Deal found 4/30$893
This United Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:13 pm
ONT
-
LIS
2 stops30h 07m
United Airlines
Fri 8/2811:25 am
LIS
-
ONT
2 stops43h 33m
United Airlines
Deal found 5/3$912
This Air Canada deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:00 am
ONT
-
LIS
2 stops20h 20m
Air Canada
Wed 8/1912:55 pm
LIS
-
ONT
2 stops39h 57m
Air Canada
Deal found 5/5$917
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/95:00 am
ONT
-
LIS
2 stops21h 30m
United Airlines
Wed 8/1912:55 pm
LIS
-
ONT
2 stops37h 24m
United Airlines
Deal found 5/5$918
This Air Canada deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/81:18 pm
ONT
-
LIS
2 stops37h 47m
Air Canada
Wed 8/1912:55 pm
LIS
-
ONT
2 stops39h 57m
Air Canada
Deal found 5/5$922
This Delta deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/291:00 pm
ONT
-
LIS
2 stops19h 10m
Delta
Sat 11/75:00 am
LIS
-
ONT
2 stops21h 18m
Delta
Deal found 5/1$932
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/37:05 am
ONT
-
LIS
2 stops19h 40m
Delta
Thu 8/2012:45 pm
LIS
-
ONT
2 stops29h 57m
Delta
Deal found 5/5$933
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:10 am
ONT
-
LIS
2 stops19h 10m
United Airlines
Thu 8/2012:20 pm
LIS
-
ONT
2 stops18h 38m
United Airlines
Deal found 5/5$936

Find flight deals from Ontario to Lisbon

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Lisbon (LIS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 6, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$833
(United Airlines)

One-way from

$374
(oojo)

Popular in

April

Cheapest in

March

Average price

$727
Provider with most accurate pricing for Ontario-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Lisbon Humberto Delgado flights.
Search Deals
From Ontario to Lisbon Humberto Delgado
Search Deals
One-way flight from Ontario to Lisbon Humberto Delgado
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($12 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Lisbon that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 6, 2026.
Use the filters below to find and compare flights from Ontario to Lisbon that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Thu 10/29

1:00 pm-3:10 pm

2 stops19h 10m

Lisbon Humberto Delgado

Sat 11/7

5:00 am-6:18 pm

2 stops21h 18m

$932

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sun 8/9

9:43 am-2:55 pm

2 stops21h 12m

Lisbon Humberto Delgado

Sun 8/16

12:15 pm-4:24 pm

2 stops36h 09m

$1,045

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sun 8/2

10:00 pm-8:00 am

2 stops26h 00m

Lisbon Humberto Delgado

Thu 8/6

10:00 am-9:52 pm

2 stops19h 52m

$1,051

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sat 8/1

6:01 pm-10:45 am

2 stops32h 44m

Lisbon Humberto Delgado

Thu 8/6

12:45 pm-10:42 am

2 stops29h 57m

$1,051

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sat 8/8

5:45 am-10:30 am

2 stops44h 45m

Lisbon Humberto Delgado

Wed 8/12

11:25 am-12:12 pm

3 stops56h 47m

$1,058

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sat 7/25

5:00 am-10:35 am

2 stops21h 35m

Lisbon Humberto Delgado

Wed 8/5

12:55 pm-8:42 pm

2 stops39h 47m

$1,071

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Thu 7/23

6:10 am-10:30 am

2 stops20h 20m

Lisbon Humberto Delgado

Wed 8/5

12:55 pm-8:42 pm

2 stops39h 47m

$1,071

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Fri 8/7

7:05 am-8:50 am

2 stops17h 45m

Lisbon Humberto Delgado

Tue 8/11

12:45 pm-10:42 am

2 stops29h 57m

$1,073

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Fri 8/7

7:05 am-8:50 am

2 stops17h 45m

Lisbon Humberto Delgado

Wed 8/12

12:45 pm-6:29 pm

2 stops37h 44m

$1,073
Quickest round-trip

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 8/25

5:45 am-8:20 am

2 stops18h 35m

Lisbon Humberto Delgado

Fri 9/4

8:40 am-8:04 pm

2 stops19h 24m

$1,155

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/4

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Ontario to Lisbon

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Lisbon in May.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Lisbon flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Ontario-Lisbon flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from Ontario-Lisbon flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Lisbon flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Lisbon flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Lisbon

Have a flexible travel schedule? Discover the best time to fly to Lisbon from Ontario with our price prediction graph.
Estimated round-trip 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.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Lisbon

How much does it cost to fly round-trip from Ontario to Lisbon?

Reviews of airlines servicing Lisbon

Get insights into the airlines that provide service to Lisbon. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Lisbon. Reviews last updated May 6, 2026.
See what other customers who have flown with Delta and United Airlines from Ontario to Lisbon have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,456 reviews

Boarding

8.1

Overall

7.9

Food

7.2

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
7.9
Good
8,456 reviews
Delta
7.9
Good
8,456 reviews

Boarding

8.1

Overall

7.9

Food

7.2

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
9,684 reviews
Delta
7.9
Good
8,456 reviews

Boarding

8.1

Overall

7.9

Food

7.2

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Lisbon. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Lisbon?

    A quick flight from Ontario to Lisbon can take about 19h 10m. Delta provides one of the quickest options available for as low as $932. Airlines will cover a distance of 5634 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Ontario to Lisbon round-trip?

    Cheapflights users have booked flights from Ontario to Lisbon round-trip from $515. Another airline that can offer you cheap pricing is Delta. United Airlines is priced at 40% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Ontario to Lisbon that include hotel bookings?

    Yes. In addition to deals on Ontario to Lisbon flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Lisbon?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Lisbon.

  • Can I find deals for business class flights from Ontario to Lisbon?

    Yes. Cheapflights offers flight deals from Ontario to Lisbon by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near Lisbon?

Book flights to Lisbon if you plan to visit one of these locations
Fátima
Ericeira
Oeiras
Beja
Costa da Caparica
Torres Vedras
Nazaré
Colares
Sesimbra

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 2 airlines flying from Ontario to Lisbon

Discover the top 2 airlines that operate flights from Ontario to Lisbon. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$515Average$727FlexibilityNo cancel feeOn-time69%
DeltaCheapest$582Average$1,282FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.