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Portugal

$264+ 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 4/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
feb. 5 — feb. 121
jue. 2/5
jue. 2/12
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 enero 6, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$458
(oojo)

One-way from

$264
(oojo)

Popular in

June

Cheapest in

January

Average price

$605
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. 22% potential increase in price ($229 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 enero 6, 2026.

This oojo deal was found by Cheapflights users on 1/6. 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.
mar. 4/146:00 amONT - LIS
2 stops24h 25mBritish Airways
mar. 4/217:15 amLIS - ONT
2 stops21h 39mBritish Airways
Deal found 1/6$458
This oojo deal was found by Cheapflights users on 1/6. 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.
lun. 2/93:09 pmONT - LIS
2 stops22h 46mBritish Airways
mié. 2/187:05 amLIS - ONT
2 stops23h 14mBritish Airways
Deal found 1/6$463
This British Airways deal was found by Cheapflights users on 1/6. 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.
mar. 2/310:58 amONT - OPO
2 stops21h 02mMultiple Airlines
mié. 3/48:40 pmOPO - ONT
2 stops32h 44mMultiple Airlines
Deal found 1/6$472
This British Airways deal was found by Cheapflights users on 1/6. 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.
dom. 2/14:45 pmONT - LIS
2 stops17h 00mBritish Airways
vie. 2/137:05 amLIS - ONT
2 stops23h 02mBritish Airways
Deal found 1/6$475
This United Airlines deal was found by Cheapflights users on 1/5. 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.
sáb. 2/216:00 amONT - OPO
2 stops19h 30mUnited Airlines
sáb. 2/286:00 amOPO - ONT
2 stops38h 38mUnited Airlines
Deal found 1/5$477
This oojo deal was found by Cheapflights users on 1/6. 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.
vie. 2/135:02 pmONT - LIS
2 stops21h 23mBritish Airways
lun. 2/166:35 pmLIS - ONT
2 stops36h 14mBritish Airways
Deal found 1/6$483
This oojo deal was found by Cheapflights users on 1/5. 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.
mar. 4/214:52 pmONT - LIS
2 stops33h 13mBritish Airways
mar. 5/126:45 pmLIS - ONT
2 stops29h 37mBritish Airways
Deal found 1/5$488
This KLM deal was found by Cheapflights users on 1/6. 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.
dom. 2/812:41 pmONT - FAO
2 stops21h 44mKLM
mar. 2/247:45 pmFAO - ONT
2 stops28h 17mKLM
Deal found 1/6$488
This United Airlines deal was found by Cheapflights users on 1/5. 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.
mar. 4/76:00 amONT - LIS
2 stops18h 20mUnited Airlines
mar. 4/1411:25 amLIS - ONT
2 stops43h 01mUnited Airlines
Deal found 1/5$492
This Delta deal was found by Cheapflights users on 1/5. 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.
mar. 2/37:30 amONT - OPO
2 stops19h 00mDelta
mié. 3/45:00 amOPO - ONT
2 stops24h 05mDelta
Deal found 1/5$494
This United Airlines deal was found by Cheapflights users on 1/6. 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.
sáb. 2/215:00 amONT - LIS
2 stops21h 15mUnited Airlines
sáb. 2/286:10 amLIS - ONT
2 stops19h 31mUnited Airlines
Deal found 1/6$497
This KLM deal was found by Cheapflights users on 1/5. 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.
jue. 2/1910:20 pmONT - FAO
2 stops50h 45mKLM
jue. 2/268:15 pmFAO - ONT
2 stops34h 22mKLM
Deal found 1/5$498

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 enero 6, 2026.
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

OntarioPorto

ONT - OPO

ONTOPO

Ontario

mar. 2/3

10:58 am-4:00 pm

2 stops21h 02m

Porto

mié. 3/4

8:40 pm-9:24 pm

2 stops32h 44m

$472

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

dom. 2/1

4:45 pm-5:45 pm

2 stops17h 00m

Lisbon Humberto Delgado

jue. 2/12

7:00 am-10:29 pm

2 stops23h 29m

$475

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

mar. 2/3

4:45 pm-5:40 pm

2 stops16h 55m

Lisbon Humberto Delgado

jue. 2/12

7:00 am-10:07 pm

2 stops23h 07m

$475

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

dom. 2/1

4:45 pm-5:45 pm

2 stops17h 00m

Lisbon Humberto Delgado

vie. 2/13

7:05 am-10:07 pm

2 stops23h 02m

$475

OntarioPorto

ONT - OPO

ONTOPO

Ontario

sáb. 2/21

6:00 am-9:30 am

2 stops19h 30m

Porto

sáb. 2/28

6:00 am-12:38 pm

2 stops38h 38m

$477

OntarioFaro

ONT - FAO

ONTFAO

Ontario

dom. 2/8

12:41 pm-6:25 pm

2 stops21h 44m

Faro

mar. 2/24

7:45 pm-4:02 pm

2 stops28h 17m

$488

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

mar. 4/7

6:00 am-8:20 am

2 stops18h 20m

Lisbon Humberto Delgado

mar. 4/14

11:25 am-10:26 pm

2 stops43h 01m

$492

OntarioPorto

ONT - OPO

ONTOPO

Ontario

mar. 2/3

7:30 am-10:30 am

2 stops19h 00m

Porto

mié. 3/4

5:00 am-9:05 pm

2 stops24h 05m

$494

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

sáb. 2/21

5:00 am-10:15 am

2 stops21h 15m

Lisbon Humberto Delgado

sáb. 2/28

6:10 am-5:41 pm

2 stops19h 31m

$497

OntarioFaro

ONT - FAO

ONTFAO

Ontario

jue. 2/19

10:20 pm-9:05 am

2 stops50h 45m

Faro

jue. 2/26

8:15 pm-10:37 pm

2 stops34h 22m

$498

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 60 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 $402). Flying from Ontario to Portugal in June is currently the most expensive (average of $711). 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.

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 enero 6, 2026.
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
9,132 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

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
9,132 reviews
United Airlines
7.4
Good
9,132 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

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 17h. British Airways provides one of the quickest options available for as low as $475. 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 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 $402). Flying from Ontario to Portugal in June is currently the most expensive (average of $711). 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 enero 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$568Average$727FlexibilityNo cancel feeOn-time69%

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