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Portugal

$426+ 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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$690
(United Airlines)

One-way from

$426
(United Airlines)

Popular in

June

Cheapest in

February

Average price

$871
Provider with most accurate pricing for Los Angeles-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Lisbon Humberto Delgado flights.
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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. 17% potential increase in price ($202 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This United Airlines deal was found by Cheapflights users on 4/28. 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 10/159:35 amONT - LIS
2 stops15h 45mUnited Airlines
Tue 10/2111:25 amLIS - ONT
2 stops33h 07mUnited Airlines
Deal found 4/28$690
This Justfly.com deal was found by Cheapflights users on 4/28. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/196:38 pmONT - LIS
2 stops32h 27mAir Canada
Sun 10/2611:00 amLIS - ONT
2 stops40h 17mAir Canada
Deal found 4/28$763
This United Airlines deal was found by Cheapflights users on 4/28. 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 7/306:10 amONT - OPO
2 stops19h 10mUnited Airlines
Tue 9/3012:50 pmOPO - ONT
2 stops18h 02mUnited Airlines
Deal found 4/28$802
This flugladen.de deal was found by Cheapflights users on 4/28. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/106:47 pmONT - PDL
2 stops28h 58mMultiple Airlines
Fri 5/235:30 pmPDL - ONT
2 stops29h 50mMultiple Airlines
Deal found 4/28$818
This Delta deal was found by Cheapflights users on 4/28. 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.
Wed 7/161:15 pmONT - LIS
2 stops17h 20mDelta
Thu 7/3110:00 amLIS - ONT
2 stops20h 27mDelta
Deal found 4/28$851
This British Airways deal was found by Cheapflights users on 4/27. 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.
Wed 9/103:00 pmONT - OPO
2 stops16h 55mBritish Airways
Tue 9/2312:20 pmOPO - ONT
2 stops19h 16mBritish Airways
Deal found 4/27$977
This Iberia deal was found by Cheapflights users on 4/28. 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.
Thu 9/113:00 pmONT - OPO
2 stops16h 55mIberia
Tue 9/2312:20 pmOPO - ONT
2 stops19h 16mIberia
Deal found 4/28$1,047
This United deal was found by Cheapflights users on 4/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/106:39 pmONT - OPO
2 stops20h 41mMultiple Airlines
Tue 7/1512:50 pmOPO - ONT
3 stops41h 21mMultiple Airlines
Deal found 4/27$1,121
This Delta deal was found by Cheapflights users on 4/28. 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 6/126:25 amONT - OPO
2 stops25h 05mDelta
Thu 6/196:30 amOPO - ONT
2 stops23h 55mDelta
Deal found 4/28$1,219
This Iberia deal was found by Cheapflights users on 4/29. 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 7/152:34 pmONT - LIS
2 stops17h 31mIberia
Tue 7/2212:30 pmLIS - ONT
2 stops18h 28mIberia
Deal found 4/29$1,388
This American Airlines deal was found by Cheapflights users on 4/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/252:44 pmONT - OPO
2 stops17h 11mAmerican Airlines
Mon 6/912:20 pmOPO - ONT
2 stops18h 42mAmerican Airlines
Deal found 4/27$1,398
This Air Canada deal was found by Cheapflights users on 4/28. 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 6/125:10 amONT - LIS
3 stops20h 10mMultiple Airlines
Thu 6/1911:25 amLIS - ONT
2 stops17h 39mMultiple Airlines
Deal found 4/28$1,579

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 April 29, 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

Wed 10/15

9:35 am-9:20 am

2 stops15h 45m

Lisbon Humberto Delgado

Tue 10/21

11:25 am-12:32 pm

2 stops33h 07m

$690

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sun 10/19

6:38 pm-11:05 am

2 stops32h 27m

Lisbon Humberto Delgado

Sun 10/26

11:00 am-8:17 pm

2 stops40h 17m

$763

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 7/30

6:10 am-9:20 am

2 stops19h 10m

Porto

Tue 9/30

12:50 pm-10:52 pm

2 stops18h 02m

$802

OntarioPonta Delgada

ONT - PDL

ONTPDL

Ontario

Sat 5/10

6:47 pm-6:45 am

2 stops28h 58m

Ponta Delgada Nordela

Fri 5/23

5:30 pm-4:20 pm

2 stops29h 50m

$818

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 7/16

1:15 pm-2:35 pm

2 stops17h 20m

Lisbon Humberto Delgado

Thu 7/31

10:00 am-10:27 pm

2 stops20h 27m

$851

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 9/10

3:00 pm-3:55 pm

2 stops16h 55m

Porto

Tue 9/23

12:20 pm-11:36 pm

2 stops19h 16m

$977

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Thu 9/11

3:00 pm-3:55 pm

2 stops16h 55m

Porto

Tue 9/23

12:20 pm-11:36 pm

2 stops19h 16m

$1,047

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Thu 7/10

6:39 pm-11:20 pm

2 stops20h 41m

Porto

Tue 7/15

12:50 pm-10:11 pm

3 stops41h 21m

$1,121

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Thu 6/12

6:25 am-3:30 pm

2 stops25h 05m

Porto

Thu 6/19

6:30 am-10:25 pm

2 stops23h 55m

$1,219

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 7/15

2:34 pm-4:05 pm

2 stops17h 31m

Lisbon Humberto Delgado

Tue 7/22

12:30 pm-10:58 pm

2 stops18h 28m

$1,388

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 31 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 $1,178). 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 April 29, 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 April 29, 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
7,929 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
7,929 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
1,333 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
8,696 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
7,929 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

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
7.0
Good
9,240 reviews
Delta
8.0
Very good
7,929 reviews

Crew

8.5

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Overall

8.0

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?

    $426 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 $429 and $433, 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 $1,178). 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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Alternative routes for Ontario to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Ontario to Portugal

Discover the top 3 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$568Average$1,023FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$691Average$1,247FlexibilityNo cancel feeOn-time67%
DeltaCheapest$733Average$1,242FlexibilityNo cancel feeOn-timeN/A

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