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$341+ 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 8/16. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
jul. 7 — jul. 141
lun. 7/7
lun. 7/14
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 julio 2, 2025.

Round-trip from

$518
(Iberia)

One-way from

$341
(Delta)

Popular in

December

Cheapest in

February

Average price

$1,032
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. 3% potential increase in price ($31 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 July 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 julio 2, 2025.

This Iberia deal was found by Cheapflights users on 7/1. 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.
mar. 10/286:38 amONT - LIS
2 stops18h 02mIberia
jue. 11/206:30 amLIS - ONT
2 stops25h 15mIberia
Deal found 7/1$518
This United Airlines deal was found by Cheapflights users on 7/2. 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.
lun. 8/186:39 pmONT - PDL
2 stops31h 01mUnited Airlines
mié. 9/311:00 amPDL - ONT
2 stops37h 37mUnited Airlines
Deal found 7/2$550
This Delta deal was found by Cheapflights users on 7/1. 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.
sáb. 10/257:00 amONT - LIS
2 stops18h 00mDelta
lun. 11/1711:15 amLIS - ONT
2 stops19h 26mDelta
Deal found 7/1$550
This United Airlines deal was found by Cheapflights users on 7/1. 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. 11/256:09 amONT - LIS
2 stops18h 01mUnited Airlines
mar. 12/25:00 amLIS - ONT
2 stops20h 46mUnited Airlines
Deal found 7/1$603
This Expedia deal was found by Cheapflights users on 6/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/1512:22 pmONT - LIS
2 stops26h 48mBritish Airways
vie. 8/226:35 amLIS - ONT
2 stops24h 13mBritish Airways
Deal found 6/30$629
This Iberia deal was found by Cheapflights users on 7/1. 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.
mié. 12/310:57 amONT - OPO
2 stops25h 03mIberia
lun. 12/84:40 pmOPO - ONT
2 stops26h 50mIberia
Deal found 7/1$633
This Ticket deal was found by Cheapflights users on 7/1. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/1511:45 amONT - LIS
2 stops19h 05mAir France
vie. 8/225:40 amLIS - ONT
2 stops24h 40mAir France
Deal found 7/1$660
This Delta deal was found by Cheapflights users on 7/1. 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. 11/117:00 amONT - OPO
2 stops19h 30mDelta
jue. 11/205:00 amOPO - ONT
2 stops20h 17mDelta
Deal found 7/1$667
This United Airlines deal was found by Cheapflights users on 7/1. 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.
lun. 12/11:00 pmONT - OPO
2 stops17h 55mUnited Airlines
jue. 12/116:00 amOPO - ONT
3 stops24h 45mUnited Airlines
Deal found 7/1$670
This American Airlines deal was found by Cheapflights users on 7/2. 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.
dom. 10/1912:48 pmONT - LIS
2 stops19h 17mAmerican Airlines
dom. 10/267:05 amLIS - ONT
2 stops21h 44mAmerican Airlines
Deal found 7/2$687
This Iberia deal was found by Cheapflights users on 6/30. 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.
lun. 8/182:57 pmONT - FAO
2 stops36h 53mIberia
mié. 8/2712:30 pmFAO - ONT
2 stops18h 18mIberia
Deal found 6/30$690
This KAYAK deal was found by Cheapflights users on 6/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/1510:57 amONT - FAO
2 stops23h 03mBritish Airways
mié. 1/2111:25 amFAO - ONT
2 stops38h 28mBritish Airways
Deal found 6/30$746

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 julio 2, 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

mar. 10/28

6:38 am-7:40 am

2 stops18h 02m

Lisbon Humberto Delgado

jue. 11/20

6:30 am-11:45 pm

2 stops25h 15m

$518

OntarioPonta Delgada

ONT - PDL

ONTPDL

Ontario

lun. 8/18

6:39 pm-8:40 am

2 stops31h 01m

Ponta Delgada Nordela

mié. 9/3

11:00 am-5:37 pm

2 stops37h 37m

$550

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

sáb. 10/25

7:00 am-9:00 am

2 stops18h 00m

Lisbon Humberto Delgado

lun. 11/17

11:15 am-10:41 pm

2 stops19h 26m

$550

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

mar. 11/25

6:09 am-8:10 am

2 stops18h 01m

Lisbon Humberto Delgado

mar. 12/2

5:00 am-5:46 pm

2 stops20h 46m

$603

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

vie. 8/15

12:22 pm-11:10 pm

2 stops26h 48m

Lisbon Humberto Delgado

vie. 8/22

6:35 am-10:48 pm

2 stops24h 13m

$629

OntarioPorto

ONT - OPO

ONTOPO

Ontario

mié. 12/3

10:57 am-8:00 pm

2 stops25h 03m

Porto

lun. 12/8

4:40 pm-11:30 am

2 stops26h 50m

$633

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

vie. 8/15

11:45 am-2:50 pm

2 stops19h 05m

Lisbon Humberto Delgado

vie. 8/22

5:40 am-10:20 pm

2 stops24h 40m

$660

OntarioPorto

ONT - OPO

ONTOPO

Ontario

mar. 11/11

7:00 am-10:30 am

2 stops19h 30m

Porto

jue. 11/20

5:00 am-5:17 pm

2 stops20h 17m

$667

OntarioPorto

ONT - OPO

ONTOPO

Ontario

lun. 12/1

1:00 pm-2:55 pm

2 stops17h 55m

Porto

jue. 12/11

6:00 am-10:45 pm

3 stops24h 45m

$670

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

dom. 10/19

12:48 pm-4:05 pm

2 stops19h 17m

Lisbon Humberto Delgado

dom. 10/26

7:05 am-9:49 pm

2 stops21h 44m

$687

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 42 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 $1,130). 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 julio 2, 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.

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 julio 2, 2025.
See what other customers who have flown with Delta, KLM, and Air France 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.
Delta
8.0
Very good
7,975 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

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
7,975 reviews
Delta
8.0
Very good
7,975 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

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
1,366 reviews
Delta
8.0
Very good
7,975 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

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 France
7.5
Good
1,472 reviews
Delta
8.0
Very good
7,975 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

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
8,861 reviews
Delta
8.0
Very good
7,975 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

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
7,975 reviews

Comfort

7.9

Boarding

8.2

Food

7.3

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?

    $341 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on United Airlines and Air France, with prices starting from $355 and $375, 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 $1,130). 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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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 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 julio 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$568Average$1,175FlexibilityNo cancel feeOn-time69%

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