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$418+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$700
(United Airlines)

One-way from

$418
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$722
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. 20% potential increase in price ($247 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This United Airlines deal was found by Cheapflights users on 2/19. 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.
Mon 3/106:00 amONT - LIS
2 stops21h 15mUnited Airlines
Mon 3/3112:20 pmLIS - ONT
2 stops34h 30mUnited Airlines
Deal found 2/19$700
This KLM deal was found by Cheapflights users on 2/19. 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.
Wed 4/232:35 pmONT - OPO
2 stops21h 00mKLM
Wed 4/308:10 pmOPO - ONT
2 stops31h 18mKLM
Deal found 2/19$828
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Wed 4/236:10 amONT - OPO
2 stops21h 10mUnited Airlines
Wed 4/306:00 amOPO - ONT
3 stops22h 21mUnited Airlines
Deal found 2/19$833
This British Airways deal was found by Cheapflights users on 2/20. 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 11/3011:00 amONT - LIS
2 stops19h 50mBritish Airways
Fri 12/57:05 amLIS - ONT
2 stops22h 53mBritish Airways
Deal found 2/20$932
This Kiwi.com deal was found by Cheapflights users on 2/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/108:26 amONT - LIS
1 stop20h 09mMultiple Airlines
Mon 3/315:00 pmLIS - ONT
2 stops30h 04mMultiple Airlines
Deal found 2/19$957
This American Airlines deal was found by Cheapflights users on 2/20. 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.
Wed 4/912:50 pmONT - LIS
2 stops26h 20mAmerican Airlines
Wed 4/236:35 amLIS - ONT
2 stops25h 15mAmerican Airlines
Deal found 2/20$961
This oojo deal was found by Cheapflights users on 2/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/410:54 amONT - LIS
2 stops28h 31mIberia
Tue 4/158:45 pmLIS - ONT
2 stops35h 05mIberia
Deal found 2/19$1,038
This Mytrip deal was found by Cheapflights users on 2/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/233:55 pmONT - OPO
3 stops35h 45mMultiple Airlines
Wed 4/307:10 amOPO - ONT
3 stops41h 33mMultiple Airlines
Deal found 2/19$1,040
This Delta deal was found by Cheapflights users on 2/20. 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 4/302:35 pmONT - OPO
2 stops17h 00mDelta
Sun 5/116:35 amOPO - ONT
2 stops24h 05mDelta
Deal found 2/20$1,084
This British Airways deal was found by Cheapflights users on 2/20. 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.
Thu 3/206:00 amONT - OPO
2 stops28h 15mBritish Airways
Mon 3/319:15 pmOPO - ONT
2 stops29h 46mBritish Airways
Deal found 2/20$1,122
This Iberia deal was found by Cheapflights users on 2/20. 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.
Fri 5/22:44 pmONT - OPO
2 stops17h 11mIberia
Sat 5/1012:20 pmOPO - ONT
2 stops19h 24mIberia
Deal found 2/20$1,424
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Thu 3/2010:38 amONT - FAO
2 stops45h 37mUnited Airlines
Thu 3/271:20 pmFAO - ONT
2 stops40h 25mUnited Airlines
Deal found 2/20$1,474

Find flights from Ontario to Portugal within your budget

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 February 20, 2025.

Fly from

Ontario

Fly to

Portugal

Route

Depart

Return

Price

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 3/10

6:00 am-10:15 am

2 stops21h 15m

Lisbon Humberto Delgado

Mon 3/31

12:20 pm-2:50 pm

2 stops34h 30m

$700

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 4/23

2:35 pm-7:35 pm

2 stops21h 00m

Porto

Wed 4/30

8:10 pm-7:28 pm

2 stops31h 18m

$828

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 4/23

6:10 am-11:20 am

2 stops21h 10m

Porto

Wed 4/30

6:00 am-8:21 pm

3 stops22h 21m

$833

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 3/10

8:26 am-11:35 am

1 stop20h 09m

Lisbon Humberto Delgado

Mon 3/31

5:00 pm-3:04 pm

2 stops30h 04m

$957

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 4/9

12:50 pm-11:10 pm

2 stops26h 20m

Lisbon Humberto Delgado

Wed 4/23

6:35 am-11:50 pm

2 stops25h 15m

$961

OntarioFaro

ONT - FAO

ONTFAO

Ontario

Tue 5/6

5:05 am-2:35 pm

2 stops25h 30m

Faro

Thu 5/22

11:40 am-9:04 pm

2 stops17h 24m

$973

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Fri 4/4

10:54 am-11:25 pm

2 stops28h 31m

Lisbon Humberto Delgado

Tue 4/15

8:45 pm-11:50 pm

2 stops35h 05m

$1,038

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 4/23

3:55 pm-11:40 am

3 stops35h 45m

Porto

Wed 4/30

7:10 am-4:43 pm

3 stops41h 33m

$1,040

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 4/30

2:35 pm-3:35 pm

2 stops17h 00m

Porto

Sun 5/11

6:35 am-10:40 pm

2 stops24h 05m

$1,084

OntarioFaro

ONT - FAO

ONTFAO

Ontario

Sun 3/9

1:30 pm-6:25 pm

2 stops21h 55m

Faro

Tue 3/25

7:45 pm-4:42 pm

2 stops27h 57m

$1,089

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 35 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.

Travel insights for flights from Ontario to Portugal

Get recent, data-driven insights about flights from Ontario to Portugal including ideal travel times, pricing trends, and more.

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 $1,234). 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 February 20, 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 February 20, 2025.
Read through reviews of airlines operating flights from Ontario to Portugal, such as Delta, KLM and Air France. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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
8,220 reviews

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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 France
7.4
Good
1,449 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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
8,766 reviews
Delta
8.0
Very good
8,220 reviews

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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
8,220 reviews

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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?

    $435 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 British Airways and Air Canada, with prices starting from $468 and $480, 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 $1,234). 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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Top 4 airlines flying from Ontario to Portugal

Discover the top 4 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$568Average$1,218FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$691Average$1,247FlexibilityNo cancel feeOn-time67%
DeltaCheapest$749Average$1,242FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$782Average$1,123FlexibilityNo cancel feeOn-time71%
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