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Portugal

$336+ 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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap 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 12, 2025.

Round-trip from

$569
(American Airlines)

One-way from

$336
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$1,201
From Ontario to Portugal
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One-way flight from Ontario to Portugal
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Highest demand for flights based on searches. 2% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($26 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find 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 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/10. 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 8/42:37 pmONT - LIS
2 stops17h 28mAmerican Airlines
Wed 8/209:00 amLIS - ONT
2 stops21h 48mAmerican Airlines
Deal found 6/10$569
This Gurufare deal was found by Cheapflights users on 6/10. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1712:47 pmONT - LIS
2 stops26h 23mBritish Airways
Wed 10/112:30 pmLIS - ONT
2 stops32h 56mBritish Airways
Deal found 6/10$591
This United Airlines deal was found by Cheapflights users on 6/12. 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 10/297:00 amONT - LIS
2 stops19h 20mUnited Airlines
Wed 11/55:00 amLIS - ONT
2 stops20h 34mUnited Airlines
Deal found 6/12$604
This Air Canada deal was found by Cheapflights users on 6/12. 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 11/115:40 amONT - LIS
2 stops19h 40mAir Canada
Tue 11/1811:00 amLIS - ONT
2 stops33h 33mAir Canada
Deal found 6/12$610
This Iberia deal was found by Cheapflights users on 6/12. 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 11/116:38 amONT - LIS
2 stops17h 02mIberia
Thu 11/206:30 amLIS - ONT
2 stops25h 15mIberia
Deal found 6/12$615
This United Airlines deal was found by Cheapflights users on 6/11. 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 12/37:00 amONT - OPO
2 stops24h 25mUnited Airlines
Sat 12/136:00 amOPO - ONT
2 stops24h 26mUnited Airlines
Deal found 6/11$664
This Iberia deal was found by Cheapflights users on 6/11. 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.
Mon 8/412:46 pmONT - OPO
2 stops19h 09mIberia
Wed 8/208:15 amOPO - ONT
2 stops22h 33mIberia
Deal found 6/11$768
This Delta deal was found by Cheapflights users on 6/10. 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 7/1011:40 amONT - LIS
2 stops22h 10mDelta
Thu 7/175:40 amLIS - ONT
2 stops18h 49mDelta
Deal found 6/10$846
This Air Canada deal was found by Cheapflights users on 6/12. 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 11/257:00 amONT - LIS
2 stops18h 20mMultiple Airlines
Tue 12/211:00 amLIS - ONT
2 stops19h 26mMultiple Airlines
Deal found 6/12$870
This United Airlines deal was found by Cheapflights users on 6/10. 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 10/176:00 amONT - FAO
2 stops22h 55mUnited Airlines
Sat 10/253:25 pmFAO - ONT
2 stops38h 10mUnited Airlines
Deal found 6/10$876
This KLM deal was found by Cheapflights users on 6/10. 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.
Sun 6/227:05 amONT - OPO
2 stops19h 35mKLM
Thu 7/38:20 pmOPO - ONT
2 stops33h 54mKLM
Deal found 6/10$1,155
This Iberia deal was found by Cheapflights users on 6/12. 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.
Mon 7/1410:53 amONT - FAO
2 stops19h 52mMultiple Airlines
Thu 7/247:55 pmFAO - ONT
2 stops30h 58mMultiple Airlines
Deal found 6/12$1,198

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 12, 2025.
Use the filters below to find and compare flights from Ontario to Portugal that are best for you.

Fly from

Ontario

Fly to

Portugal

Route

Depart

Return

Price

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 8/4

2:37 pm-4:05 pm

2 stops17h 28m

Lisbon Humberto Delgado

Wed 8/20

9:00 am-10:48 pm

2 stops21h 48m

$569

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 9/17

12:47 pm-11:10 pm

2 stops26h 23m

Lisbon Humberto Delgado

Wed 10/1

12:30 pm-1:26 pm

2 stops32h 56m

$591

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 10/29

7:00 am-9:20 am

2 stops19h 20m

Lisbon Humberto Delgado

Wed 11/5

5:00 am-5:34 pm

2 stops20h 34m

$604

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 11/11

5:40 am-9:20 am

2 stops19h 40m

Lisbon Humberto Delgado

Tue 11/18

11:00 am-12:33 pm

2 stops33h 33m

$610

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 11/11

6:38 am-7:40 am

2 stops17h 02m

Lisbon Humberto Delgado

Thu 11/20

6:30 am-11:45 pm

2 stops25h 15m

$615

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 12/3

7:00 am-3:25 pm

2 stops24h 25m

Porto

Sat 12/13

6:00 am-10:26 pm

2 stops24h 26m

$664

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Mon 8/4

12:46 pm-3:55 pm

2 stops19h 09m

Porto

Wed 8/20

8:15 am-10:48 pm

2 stops22h 33m

$768

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Thu 7/10

11:40 am-5:50 pm

2 stops22h 10m

Lisbon Humberto Delgado

Thu 7/17

5:40 am-4:29 pm

2 stops18h 49m

$846

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 11/25

7:00 am-9:20 am

2 stops18h 20m

Lisbon Humberto Delgado

Tue 12/2

11:00 am-10:26 pm

2 stops19h 26m

$870

OntarioFaro

ONT - FAO

ONTFAO

Ontario

Fri 10/17

6:00 am-12:55 pm

2 stops22h 55m

Faro

Sat 10/25

3:25 pm-9:35 pm

2 stops38h 10m

$876

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 40 results
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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

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

Currently, January is the cheapest month in which you can book a flight from Ontario to Portugal (average of $612). Flying from Ontario to Portugal in June is currently the most expensive (average of $1,136). 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.

What is the cheapest time of day to fly from ONT to PT?

Find hourly flight availability from Ontario to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Portugal as you normally would.

Rainfall in Portugal by month

Plan your trip to Portugal by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

Plan your trip to Portugal by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portugal, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

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 12, 2025.
Read through reviews of airlines operating flights from Ontario to Portugal, such as Delta, KLM and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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.
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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.
Air Canada
7.1
Good
9,531 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

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.

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

    $336 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Delta and Air Canada, with prices starting from $351 and $411, respectively.

  • 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 - Faro 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.

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

    Currently, January is the cheapest month in which you can book a flight from Ontario to Portugal (average of $612). Flying from Ontario to Portugal in June is currently the most expensive (average of $1,136). 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.

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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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$568Average$1,023FlexibilityNo cancel feeOn-time69%
DeltaCheapest$733Average$1,242FlexibilityNo cancel feeOn-timeN/A

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