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Portugal

$287+ 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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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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 November 13, 2025.

This United Airlines deal was found by Cheapflights users on 11/12. 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.
Tue 12/26:00 amONT - LIS
2 stops18h 10mUnited Airlines
Tue 12/95:00 amLIS - ONT
2 stops20h 37mUnited Airlines
Deal found 11/12$496
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Mon 11/176:05 amONT - LIS
2 stops18h 05mUnited Airlines
Wed 12/106:10 amLIS - ONT
2 stops19h 27mUnited Airlines
Deal found 11/10$498
This Delta deal was found by Cheapflights users on 11/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:05 amONT - LIS
2 stops17h 35mDelta
Tue 11/255:30 amLIS - ONT
2 stops26h 22mDelta
Deal found 11/11$506
This United Airlines deal was found by Cheapflights users on 11/11. 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 12/106:00 amONT - LIS
2 stops18h 10mUnited Airlines
Wed 12/1710:15 amLIS - ONT
2 stops19h 34mUnited Airlines
Deal found 11/11$510
This United Airlines deal was found by Cheapflights users on 11/13. 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 12/75:05 amONT - LIS
2 stops19h 05mUnited Airlines
Sun 12/1410:15 amLIS - ONT
2 stops18h 27mUnited Airlines
Deal found 11/13$534
This United Airlines deal was found by Cheapflights users on 11/10. 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 11/145:05 amONT - LIS
2 stops19h 05mUnited Airlines
Tue 11/186:10 amLIS - ONT
2 stops19h 24mUnited Airlines
Deal found 11/10$541
This United Airlines deal was found by Cheapflights users on 11/11. 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 12/106:00 amONT - LIS
2 stops18h 10mUnited Airlines
Thu 12/2511:55 amLIS - ONT
2 stops18h 30mUnited Airlines
Deal found 11/11$610
This British Airways deal was found by Cheapflights users on 11/11. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/2512:49 pmONT - LIS
2 stops20h 51mBritish Airways
Tue 12/27:40 pmLIS - ONT
2 stops30h 37mBritish Airways
Deal found 11/11$672
This Delta deal was found by Cheapflights users on 11/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:05 amONT - LIS
2 stops16h 55mDelta
Mon 1/1210:00 amLIS - ONT
2 stops20h 38mDelta
Deal found 11/11$675
This United Airlines deal was found by Cheapflights users on 11/12. 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 11/196:05 amONT - LIS
2 stops18h 05mUnited Airlines
Wed 11/266:10 amLIS - ONT
2 stops24h 41mUnited Airlines
Deal found 11/12$698
This United Airlines deal was found by Cheapflights users on 11/11. 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.
Tue 11/256:05 amONT - LIS
2 stops18h 05mUnited Airlines
Tue 12/211:20 amLIS - ONT
3 stops43h 29mUnited Airlines
Deal found 11/11$711
This Air Canada deal was found by Cheapflights users on 11/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:05 amONT - LIS
2 stops19h 50mMultiple Airlines
Sun 12/1410:50 amLIS - ONT
2 stops17h 52mMultiple Airlines
Deal found 11/11$713

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 November 13, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$492
(United Airlines)

One-way from

$287
(Iberia)

Popular in

June

Cheapest in

February

Average price

$670
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. 17% potential increase in price ($180 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 13, 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

Thu 2/5

5:05 am-7:55 am

2 stops18h 50m

Lisbon Humberto Delgado

Wed 2/11

5:00 am-8:58 pm

2 stops23h 58m

$492

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Thu 1/8

5:05 am-9:20 am

2 stops20h 15m

Lisbon Humberto Delgado

Sat 1/17

6:10 am-10:53 pm

2 stops24h 43m

$495

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 12/3

5:05 am-8:55 am

2 stops19h 50m

Lisbon Humberto Delgado

Fri 12/12

11:20 am-12:32 pm

2 stops33h 12m

$496

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 2/10

5:05 am-8:10 am

2 stops19h 05m

Lisbon Humberto Delgado

Wed 2/18

5:00 am-8:50 pm

2 stops23h 50m

$496

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 1/27

6:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Sun 2/8

12:15 pm-11:18 am

2 stops31h 03m

$496

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Fri 1/9

6:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Sat 1/17

12:20 pm-10:53 pm

2 stops18h 33m

$496

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 11/17

6:05 am-8:10 am

2 stops18h 05m

Lisbon Humberto Delgado

Wed 12/10

6:10 am-5:37 pm

2 stops19h 27m

$498

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 11/17

6:05 am-8:10 am

2 stops18h 05m

Lisbon Humberto Delgado

Wed 12/3

6:10 am-8:42 pm

2 stops22h 32m

$498

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 1/6

6:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Thu 1/15

6:10 am-10:53 pm

2 stops24h 43m

$500

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 2/11

5:05 am-8:10 am

2 stops19h 05m

Lisbon Humberto Delgado

Thu 2/19

6:10 am-5:41 pm

2 stops19h 31m

$500

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

Showing 1-10 of 44 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, May is the cheapest month in which you can book a flight from Ontario to Portugal (average of $412). Flying from Ontario to Portugal in June is currently the most expensive (average of $669). 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 November 13, 2025.

It’s optimal to fly from Ontario to Portugal in the evening. By choosing this option you can save up to 38% on the cost of your flight, compared to a flight at noon.

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 November 13, 2025.
See what other customers who have flown with 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.
United Airlines
7.4
Good
9,015 reviews

Food

6.6

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
9,015 reviews
United Airlines
7.4
Good
9,015 reviews

Food

6.6

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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 50m. United Airlines provides one of the quickest options available for as low as $492. Airlines will cover a distance of 5634 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    $287 is the cheapest one-way deal found within the past few days, from Iberia. You may also be able to find cheap deals on British Airways and United Airlines, with prices starting from $287 and $419, 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, May is the cheapest month in which you can book a flight from Ontario to Portugal (average of $412). Flying from Ontario to Portugal in June is currently the most expensive (average of $669). 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 airline flying from Ontario to Portugal

Discover the top airline 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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$515Average$740FlexibilityNo cancel feeOn-time69%

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