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Portugal

$346+ Cheap flights from Ontario (ONT) to Portugal

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
Jul 29 — Aug 51
Wed 7/29
Wed 8/5
1 adult, Economy
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Cheap flight deals from Ontario to Portugal

Cheapest flights from Ontario to Portugal
Explore the most affordable flight options available from Ontario to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 29, 2026.

This United Airlines deal was found by Cheapflights users on 6/27. 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 12/96:00 am
ONT
-
OPO
2 stops19h 30m
United Airlines
Wed 12/2312:35 pm
OPO
-
ONT
2 stops18h 31m
United Airlines
Deal found 6/27$745
This United Airlines deal was found by Cheapflights users on 6/26. 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 12/95:00 am
ONT
-
LIS
2 stops17h 55m
United Airlines
Wed 12/236:10 am
LIS
-
ONT
2 stops19h 37m
United Airlines
Deal found 6/26$794
This United Airlines deal was found by Cheapflights users on 6/25. 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 10/218:03 am
ONT
-
LIS
2 stops17h 17m
United Airlines
Thu 10/2910:15 am
LIS
-
ONT
2 stops18h 35m
United Airlines
Deal found 6/25$804
This United Airlines deal was found by Cheapflights users on 6/24. 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 12/16:00 am
ONT
-
LIS
2 stops18h 10m
United Airlines
Wed 12/1610:15 am
LIS
-
ONT
2 stops18h 05m
United Airlines
Deal found 6/24$807
This British Airways deal was found by Cheapflights users on 6/27. 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 10/1810:25 am
ONT
-
OPO
2 stops17h 20m
Multiple Airlines
Sat 10/318:40 pm
OPO
-
ONT
2 stops21h 17m
Multiple Airlines
Deal found 6/27$810
This KLM deal was found by Cheapflights users on 6/27. 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.
Fri 10/1612:18 pm
ONT
-
LIS
2 stops22h 27m
KLM
Fri 10/235:00 am
LIS
-
ONT
2 stops25h 43m
KLM
Deal found 6/27$843
This United Airlines deal was found by Cheapflights users on 6/24. 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 12/286:00 am
ONT
-
OPO
2 stops19h 30m
United Airlines
Thu 1/76:00 am
OPO
-
ONT
2 stops22h 20m
United Airlines
Deal found 6/24$858
This Air Canada deal was found by Cheapflights users on 6/24. 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.
Tue 8/117:00 am
ONT
-
OPO
2 stops16h 00m
Multiple Airlines
Thu 8/2711:50 am
OPO
-
ONT
2 stops18h 45m
Multiple Airlines
Deal found 6/24$865
This United Airlines deal was found by Cheapflights users on 6/25. 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 7/156:00 am
ONT
-
PDL
2 stops19h 40m
United Airlines
Wed 7/229:35 am
PDL
-
ONT
2 stops43h 20m
United Airlines
Deal found 6/25$890
This United Airlines deal was found by Cheapflights users on 6/25. 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 9/296:00 am
ONT
-
LIS
2 stops18h 20m
United Airlines
Sat 10/3110:15 am
LIS
-
ONT
2 stops18h 35m
United Airlines
Deal found 6/25$890
This United Airlines deal was found by Cheapflights users on 6/24. 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 12/146:00 am
ONT
-
OPO
2 stops19h 30m
United Airlines
Thu 12/316:00 am
OPO
-
ONT
2 stops25h 06m
United Airlines
Deal found 6/24$892
This Air France deal was found by Cheapflights users on 6/26. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/229:55 am
ONT
-
LIS
2 stops21h 00m
Multiple Airlines
Mon 10/2611:30 am
LIS
-
ONT
2 stops30h 57m
Multiple Airlines
Deal found 6/26$899

Find flight deals from Ontario to Portugal

Keep the following information in mind while searching for Ontario to Portugal flight deals. Data was last updated June 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$745
(United Airlines)

One-way from

$346
(United Airlines)

Popular in

June

Cheapest in

January

Average price

$1,152
Provider with most accurate pricing for Los Angeles-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Lisbon Humberto Delgado flights.
Search Deals
From Ontario to Portugal
Search Deals
One-way flight from Ontario to Portugal
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($276 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Portugal 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 June 29, 2026.
Use the filters below to find and compare flights from Ontario to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Tue 8/18

5:00 am-7:00 am

2 stops18h 00m

Porto

Tue 8/25

6:00 am-10:35 pm

2 stops24h 35m

$865

OntarioPonta Delgada

ONT - PDL

ONTPDL

Ontario

Wed 7/15

6:00 am-8:40 am

2 stops19h 40m

Ponta Delgada Nordela

Wed 7/22

9:35 am-9:55 pm

2 stops43h 20m

$890

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 9/22

6:00 am-8:20 am

2 stops18h 20m

Lisbon Humberto Delgado

Tue 9/29

12:20 pm-10:49 pm

2 stops18h 29m

$911

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sat 8/29

1:18 pm-9:45 am

2 stops36h 27m

Porto

Wed 9/16

11:20 am-10:59 pm

2 stops43h 39m

$923

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sun 8/16

6:00 am-6:55 am

2 stops16h 55m

Porto

Mon 8/24

12:10 pm-10:59 pm

2 stops18h 49m

$926

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 9/2

5:00 am-7:00 am

2 stops18h 00m

Porto

Tue 9/8

9:00 am-10:59 pm

2 stops21h 59m

$935

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Fri 8/28

10:00 pm-10:25 am

2 stops52h 25m

Porto

Wed 9/16

11:45 am-4:35 pm

2 stops36h 50m

$936

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Fri 10/16

6:00 am-9:45 am

2 stops19h 45m

Porto

Wed 10/21

6:00 am-8:31 pm

2 stops22h 31m

$942

OntarioFaro

ONT - FAO

ONTFAO

Ontario

Tue 8/11

5:00 am-3:05 pm

2 stops26h 05m

Faro

Tue 8/18

7:05 pm-8:01 pm

2 stops32h 56m

$966

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Tue 9/15

6:00 am-9:45 am

2 stops19h 45m

Porto

Fri 9/25

6:00 am-8:31 pm

2 stops22h 31m

$979

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/26

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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6

Best time to book a flight from Ontario to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal 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 Portugal
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. 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 Portugal. Reviews last updated June 29, 2026.
See what other customers who have flown with Delta and United Airlines from Ontario to Portugal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,449 reviews

Entertainment

7.8

Food

7.2

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

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
7.8
Good
8,449 reviews
Delta
7.8
Good
8,449 reviews

Entertainment

7.8

Food

7.2

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

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
9,894 reviews
Delta
7.8
Good
8,449 reviews

Entertainment

7.8

Food

7.2

Crew

8.5

Boarding

8.1

Comfort

7.8

Overall

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 Portugal. 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 from for flights from Ontario to Portugal?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Portugal from Ontario.

  • How long is the flight from Ontario to Portugal?

    A quick flight from Ontario to Portugal can take about 18h. United Airlines provides one of the quickest options available for as low as $865. Airlines will cover a distance of 5549 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    When deciding which route to take from Ontario to Portugal consider Ontario - Lisbon Humberto Delgado, Ontario - Porto or Ontario - Ponta Delgada Nordela as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Portugal 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

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Top 2 airlines flying from Ontario to Portugal

Discover the top 2 airlines that operate flights from Ontario to Portugal. 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 June 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$515Average$1,177FlexibilityNo cancel feeOn-time69%
DeltaCheapest$582Average$1,282FlexibilityNo cancel feeOn-timeN/A

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