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$562+ Cheap flights from Portugal to Ontario (ONT)

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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — ONT
Nov 18 — Nov 251
Tue 11/18
Tue 11/25
1 adult, Economy
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Cheap flight deals from Portugal to Ontario

Keep the following information in mind while searching for Portugal to Ontario flight deals. Data was last updated October 19, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$882
(American Airlines)

One-way from

$562
(Iberia)

Popular in

October

Cheapest in

February

Average price

$1,003
Provider with most accurate pricing for Lisbon Humberto Delgado-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Los Angeles flights.
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From Portugal to Ontario
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One-way flight from Portugal to Ontario
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Highest demand for flights based on searches. 1% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Portugal to Ontario

Cheapest flights from Portugal to Ontario
Explore the most affordable flight options available from Portugal to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 19, 2025.

This American Airlines deal was found by Cheapflights users on 10/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2811:05 amLIS - ONT
2 stops30h 02mAmerican Airlines
Sun 11/27:30 pmONT - LIS
2 stops29h 35mAmerican Airlines
Deal found 10/18$898
This Delta deal was found by Cheapflights users on 10/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/145:00 amLIS - ONT
2 stops25h 55mDelta
Mon 11/247:05 amONT - LIS
2 stops16h 55mDelta
Deal found 10/17$903
This KLM deal was found by Cheapflights users on 10/18. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/47:05 pmFAO - ONT
2 stops29h 04mKLM
Mon 12/810:25 pmONT - FAO
2 stops27h 05mKLM
Deal found 10/18$949
This British Airways deal was found by Cheapflights users on 10/18. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/26:50 pmFAO - ONT
2 stops35h 39mBritish Airways
Thu 11/612:46 pmONT - FAO
2 stops36h 09mBritish Airways
Deal found 10/18$1,160
This Delta deal was found by Cheapflights users on 10/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/285:30 amLIS - ONT
2 stops22h 50mDelta
Sun 11/27:05 amONT - LIS
2 stops17h 50mDelta
Deal found 10/17$1,165
This KLM deal was found by Cheapflights users on 10/19. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/67:05 pmFAO - ONT
2 stops28h 48mKLM
Tue 11/117:05 amONT - FAO
2 stops18h 25mKLM
Deal found 10/19$1,269
This American Airlines deal was found by Cheapflights users on 10/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2711:05 amLIS - ONT
2 stops19h 54mAmerican Airlines
Sun 11/29:59 amONT - LIS
2 stops15h 06mAmerican Airlines
Deal found 10/18$1,862
This United Airlines deal was found by Cheapflights users on 10/17. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1912:20 pmLIS - ONT
2 stops18h 32mUnited Airlines
Thu 10/306:05 amONT - LIS
2 stops19h 05mUnited Airlines
Deal found 10/17$2,064
This Air Canada deal was found by Cheapflights users on 10/19. 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.
Thu 11/1310:55 amLIS - ONT
2 stops19h 36mMultiple Airlines
Thu 11/277:00 amONT - LIS
2 stops18h 20mMultiple Airlines
Deal found 10/19$2,308
This American Airlines deal was found by Cheapflights users on 10/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/147:05 amLIS - ONT
2 stops23h 24mAmerican Airlines
Wed 11/267:00 amONT - LIS
2 stops17h 55mAmerican Airlines
Deal found 10/17$3,160
This Air Canada deal was found by Cheapflights users on 10/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/25:05 amFAO - ONT
3 stops22h 39mAir Canada
Thu 11/65:05 amONT - FAO
3 stops26h 40mAir Canada
Deal found 10/18$3,595
This Air Canada deal was found by Cheapflights users on 10/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1310:55 amLIS - ONT
2 stops33h 38mAir Canada
Tue 11/255:05 amONT - LIS
2 stops20h 15mAir Canada
Deal found 10/17$3,841

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portugal to Ontario 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 October 19, 2025.
Use the filters below to find and compare flights from Portugal to Ontario that are best for you.

Fly from

Portugal

Fly to

Ontario

Route

Depart

Return

Price

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Fri 2/20

11:05 am-11:43 pm

2 stops20h 38m

Ontario

Tue 2/24

11:05 am-5:40 pm

2 stops22h 35m

$882

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Mon 11/17

5:00 am-10:55 pm

2 stops25h 55m

Ontario

Mon 11/24

7:05 am-8:00 am

2 stops16h 55m

$903

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Fri 11/14

5:00 am-10:55 pm

2 stops25h 55m

Ontario

Mon 11/24

7:05 am-8:00 am

2 stops16h 55m

$903

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Tue 11/18

5:00 am-10:55 pm

2 stops25h 55m

Ontario

Mon 11/24

7:05 am-8:00 am

2 stops16h 55m

$903

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Thu 3/5

6:10 am-10:15 pm

2 stops24h 05m

Ontario

Mon 3/16

6:02 am-8:10 am

2 stops19h 08m

$908

FaroOntario

FAO - ONT

FAOONT

Faro

Thu 12/4

7:05 pm-4:09 pm

2 stops29h 04m

Ontario

Mon 12/8

10:25 pm-9:30 am

2 stops27h 05m

$949

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Fri 2/20

6:10 am-5:41 pm

2 stops19h 31m

Ontario

Tue 2/24

5:00 am-9:20 am

3 stops20h 20m

$952

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Sun 2/1

5:00 am-8:58 pm

2 stops23h 58m

Ontario

Thu 2/5

6:00 am-8:10 am

2 stops18h 10m

$987

FaroOntario

FAO - ONT

FAOONT

Faro

Sun 11/2

6:50 pm-10:29 pm

2 stops35h 39m

Ontario

Thu 11/6

12:46 pm-8:55 am

2 stops36h 09m

$1,160

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Fri 3/13

6:10 am-10:15 pm

2 stops23h 05m

Ontario

Fri 3/27

1:45 pm-8:20 am

2 stops35h 35m

$1,180

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/18

Showing 1-10 of 28 results
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Best time to book a flight from Portugal to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Portugal 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 Portugal to Ontario

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

Currently, May is the cheapest month in which you can book a flight from Portugal to Ontario (average of $292). Flying from Portugal to Ontario in August is currently the most expensive (average of $732). 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.

Related info for your journey

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

  • What airport do you fly into for flights to Ontario from Portugal?

    If you book a flight to Ontario from Portugal, you will be flying to Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • How long is the flight from Portugal to Ontario?

    There are many flights that can get you from Portugal to Ontario in 20h 38m. Fly via American Airlines, Delta, or KLM to get the fastest option. The distance from Portugal to Ontario is about 5634 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Portugal to Ontario one-way?

    The cheapest airlines for a one-way flight from Portugal to Ontario are Iberia ($562), British Airways ($575), and American Airlines ($587).

  • What are the most popular routes from Portugal to Ontario?

    The most popular route from Portugal to Ontario is Lisbon Humberto Delgado - Ontario. You may also consider Faro - Ontario or Ponta Delgada Nordela - Ontario.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portugal to Ontario 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 Portugal to Ontario?

    Currently, May is the cheapest month in which you can book a flight from Portugal to Ontario (average of $292). Flying from Portugal to Ontario in August is currently the most expensive (average of $732). 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

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