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Lisbon

$356+ 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 7/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
Apr 18 — Apr 251
Sat 4/18
Sat 4/25
1 adult, Economy
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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 March 19, 2026.

This United Airlines deal was found by Cheapflights users on 3/15. 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 4/3010:45 am
ONT
-
LIS
2 stops28h 00m
United Airlines
Thu 5/711:25 am
LIS
-
ONT
2 stops43h 34m
United Airlines
Deal found 3/15$614
This United Airlines deal was found by Cheapflights users on 3/15. 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.
Fri 12/45:00 am
ONT
-
LIS
2 stops19h 10m
United Airlines
Tue 12/86:10 am
LIS
-
ONT
2 stops38h 23m
United Airlines
Deal found 3/15$621
This United Airlines deal was found by Cheapflights users on 3/15. 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 10/286:02 am
ONT
-
LIS
2 stops19h 08m
United Airlines
Fri 11/610:15 am
LIS
-
ONT
2 stops20h 51m
United Airlines
Deal found 3/15$631
This United Airlines deal was found by Cheapflights users on 3/14. 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 9/228:00 am
ONT
-
LIS
2 stops19h 00m
United Airlines
Tue 9/2911:25 am
LIS
-
ONT
2 stops40h 55m
United Airlines
Deal found 3/14$675
This Delta deal was found by Cheapflights users on 3/15. 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.
Tue 9/222:00 pm
ONT
-
LIS
2 stops19h 50m
Delta
Tue 9/295:35 am
LIS
-
ONT
2 stops25h 05m
Delta
Deal found 3/15$687
This Iberia deal was found by Cheapflights users on 3/18. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/212:08 pm
ONT
-
LIS
2 stops20h 17m
Iberia
Wed 5/66:35 am
LIS
-
ONT
2 stops25h 11m
Iberia
Deal found 3/18$695
This Ovago deal was found by Cheapflights users on 3/17. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/244:52 pm
ONT
-
LIS
2 stops22h 18m
Multiple Airlines
Sat 5/24:45 pm
LIS
-
ONT
2 stops39h 01m
Multiple Airlines
Deal found 3/17$697
This SmartFares deal was found by Cheapflights users on 3/17. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:30 am
ONT
-
LIS
2 stops26h 55m
Iberia
Sat 5/24:45 pm
LIS
-
ONT
2 stops39h 01m
Iberia
Deal found 3/17$702
This oojo deal was found by Cheapflights users on 3/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/264:59 pm
ONT
-
LIS
2 stops18h 56m
British Airways
Thu 11/57:00 am
LIS
-
ONT
2 stops23h 23m
British Airways
Deal found 3/17$721

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 March 19, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$614
(United Airlines)

One-way from

$352
(United Airlines)

Popular in

April

Cheapest in

March

Average price

$638
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 ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 19, 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 4/30

10:45 am-10:45 pm

2 stops28h 00m

Lisbon Humberto Delgado

Thu 5/7

11:25 am-10:59 pm

2 stops43h 34m

$614

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 8/10

5:45 am-8:20 am

2 stops18h 35m

Lisbon Humberto Delgado

Wed 8/19

10:25 am-9:59 pm

2 stops19h 34m

$791

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 7/27

6:30 am-10:30 am

2 stops44h 00m

Lisbon Humberto Delgado

Sun 8/9

1:00 pm-12:12 pm

2 stops55h 12m

$818

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 7/21

6:30 am-10:30 am

2 stops20h 00m

Lisbon Humberto Delgado

Thu 8/13

12:20 pm-10:58 pm

2 stops18h 38m

$876

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 7/27

2:00 pm-5:50 pm

2 stops19h 50m

Lisbon Humberto Delgado

Sun 8/9

5:35 am-11:44 pm

2 stops26h 09m

$942

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 7/7

6:30 am-10:30 am

2 stops20h 00m

Lisbon Humberto Delgado

Thu 7/23

12:20 pm-10:51 pm

2 stops18h 31m

$960

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 4/29

6:05 am-8:20 am

2 stops18h 15m

Lisbon Humberto Delgado

Tue 6/2

10:25 am-10:37 pm

2 stops20h 12m

$974
Quickest round-trip

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sat 8/1

5:45 am-8:20 am

2 stops18h 35m

Lisbon Humberto Delgado

Sat 8/22

10:25 am-8:52 pm

2 stops18h 27m

$1,050

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sun 5/24

6:30 pm-9:20 am

2 stops30h 50m

Lisbon Humberto Delgado

Tue 6/2

11:25 am-10:46 pm

2 stops43h 21m

$1,170
Cheapest one-way

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 4/8

5:10 am-1:40 pm

2 stops24h 30m

$403

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/18

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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 March.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Lisbon flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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

What is the cheapest month to book a flight from Ontario to Lisbon?

Currently, January is the cheapest month in which you can book a flight from Ontario to Lisbon (average of $431). Flying from Ontario to Lisbon in June is currently the most expensive (average of $712). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 March 19, 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
8,292 reviews

Food

7.2

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Overall

7.9

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
8,292 reviews
Delta
7.9
Good
8,292 reviews

Food

7.2

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Overall

7.9

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
9,439 reviews
Delta
7.9
Good
8,292 reviews

Food

7.2

Crew

8.5

Boarding

8.1

Entertainment

7.8

Comfort

7.9

Overall

7.9

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 18h 35m. United Airlines provides one of the quickest options available for as low as $791. 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 38% 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.

  • What is the cheapest month to book a flight from Ontario to Lisbon?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Lisbon (average of $431). Flying from Ontario to Lisbon in June is currently the most expensive (average of $712). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

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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 March 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$515Average$727FlexibilityNo cancel feeOn-time69%
DeltaCheapest$582Average$844FlexibilityNo cancel feeOn-timeN/A

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