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Ontario

$572+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
LIS — ONT
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
1 adult, Economy
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Cheap 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 January 20, 2026.

This British Airways deal was found by Cheapflights users on 1/19. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/137:05 am
LIS
-
ONT
2 stops23h 02m
British Airways
Sun 2/225:02 pm
ONT
-
LIS
2 stops20h 43m
British Airways
Deal found 1/19$781
This Iberia deal was found by Cheapflights users on 1/18. 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.
Sat 2/146:45 pm
LIS
-
ONT
2 stops35h 44m
Iberia
Sat 2/217:00 am
ONT
-
LIS
2 stops25h 05m
Iberia
Deal found 1/18$784
This Rumbo deal was found by Cheapflights users on 1/18. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/310:35 am
LIS
-
ONT
2 stops31h 33m
British Airways
Sat 2/73:09 pm
ONT
-
LIS
2 stops39h 41m
British Airways
Deal found 1/18$797
This British Airways deal was found by Cheapflights users on 1/19. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/137:05 am
LIS
-
ONT
2 stops23h 02m
British Airways
Sat 2/2111:58 pm
ONT
-
LIS
2 stops37h 47m
British Airways
Deal found 1/19$799
This Iberia deal was found by Cheapflights users on 1/18. 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 2/38:20 am
LIS
-
ONT
2 stops22h 28m
Iberia
Sat 2/710:58 am
ONT
-
LIS
2 stops36h 42m
Iberia
Deal found 1/18$807
This Iberia deal was found by Cheapflights users on 1/19. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/157:45 am
LIS
-
ONT
2 stops22h 44m
Iberia
Sat 2/216:00 am
ONT
-
LIS
2 stops21h 50m
Iberia
Deal found 1/19$817
This British Airways deal was found by Cheapflights users on 1/19. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/137:05 am
LIS
-
ONT
2 stops23h 02m
British Airways
Fri 2/205:02 pm
ONT
-
LIS
2 stops16h 53m
British Airways
Deal found 1/19$828
This Iberia deal was found by Cheapflights users on 1/18. 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.
Sat 2/144:45 pm
LIS
-
ONT
2 stops37h 44m
Iberia
Fri 2/2010:56 am
ONT
-
LIS
2 stops45h 09m
Iberia
Deal found 1/18$842
This United Airlines deal was found by Cheapflights users on 1/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/135:00 am
LIS
-
ONT
2 stops25h 57m
United Airlines
Sat 2/215:00 am
ONT
-
LIS
2 stops21h 15m
United Airlines
Deal found 1/19$889
This United Airlines deal was found by Cheapflights users on 1/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/155:00 am
LIS
-
ONT
2 stops25h 57m
United Airlines
Sat 2/216:10 am
ONT
-
LIS
2 stops20h 05m
United Airlines
Deal found 1/19$912
This United Airlines deal was found by Cheapflights users on 1/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/145:00 am
LIS
-
ONT
2 stops20h 41m
United Airlines
Fri 2/205:00 am
ONT
-
LIS
2 stops21h 15m
United Airlines
Deal found 1/19$935
This United Airlines deal was found by Cheapflights users on 1/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/1410:15 am
LIS
-
ONT
2 stops19h 44m
United Airlines
Sun 2/155:00 am
ONT
-
LIS
2 stops19h 10m
United Airlines
Deal found 1/19$939

Find flight deals from Portugal to Ontario

Keep the following information in mind while searching for Portugal to Ontario flight deals. Data was last updated January 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$781
(British Airways)

One-way from

$572
(American Airlines)

Popular in

August

Cheapest in

September

Average price

$900
Provider with most accurate pricing for Lisbon Humberto Delgado-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lisbon Humberto Delgado-Los Angeles flights.
Search Deals
From Portugal to Ontario
Search Deals
One-way flight from Portugal to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($41 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 20, 2026.
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

Sat 2/14

6:40 pm-10:07 pm

2 stops35h 27m

Ontario

Sun 2/22

5:02 pm-5:45 pm

2 stops16h 43m

$781

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Sun 2/15

7:05 am-10:07 pm

2 stops23h 02m

Ontario

Sun 2/22

12:18 pm-9:45 pm

2 stops25h 27m

$781

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Sun 2/15

7:05 am-10:07 pm

2 stops23h 02m

Ontario

Sat 2/21

11:58 pm-5:45 pm

2 stops33h 47m

$799

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Fri 2/13

7:05 am-10:07 pm

2 stops23h 02m

Ontario

Sat 2/21

11:58 pm-9:45 pm

2 stops37h 47m

$799

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Fri 2/13

5:00 am-10:57 pm

2 stops25h 57m

Ontario

Sat 2/21

5:00 am-10:15 am

2 stops21h 15m

$889

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Thu 2/19

5:00 am-5:41 pm

2 stops20h 41m

Ontario

Thu 3/19

6:00 am-10:15 am

2 stops21h 15m

$935

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Sat 2/14

5:00 am-5:41 pm

2 stops20h 41m

Ontario

Fri 2/20

5:00 am-10:15 am

2 stops21h 15m

$935

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Sat 2/14

10:15 am-9:59 pm

2 stops19h 44m

Ontario

Sun 2/15

5:00 am-8:10 am

2 stops19h 10m

$939

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Sun 2/15

7:05 am-10:29 pm

2 stops23h 24m

Ontario

Fri 2/20

5:02 pm-5:55 pm

2 stops16h 53m

$1,169

LisbonOntario

LIS - ONT

LISONT

Lisbon Humberto Delgado

Tue 2/17

6:30 am-10:49 pm

2 stops24h 19m

Ontario

Sun 3/1

2:39 pm-5:45 pm

2 stops19h 06m

$3,011

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 30 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 $279). Flying from Portugal to Ontario in August is currently the most expensive (average of $737). 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 25h 57m. Fly via British Airways or United Airlines 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 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 $279). Flying from Portugal to Ontario in August is currently the most expensive (average of $737). 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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