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$409+ Cheap flights from Ontario (ONT) to Porto (OPO)

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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OPO
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
1 adult, Economy
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Cheap flight deals from Ontario to Porto

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated julio 3, 2025.

Round-trip from

$633
(Iberia)

One-way from

$409
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$1,185
From Ontario to Porto
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One-way flight from Ontario to Porto
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High demand for flights, 3% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($20 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 Porto

Cheapest flights from Ontario to Porto
Explore the most affordable flight options available from Ontario to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 3, 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.
mié. 12/310:57 amONT - OPO
2 stops25h 03mIberia
lun. 12/84:40 pmOPO - ONT
2 stops26h 50mIberia
Deal found 7/1$633
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. 8/1710:50 amONT - OPO
2 stops21h 05mAmerican Airlines
jue. 8/2112:20 pmOPO - ONT
2 stops19h 48mAmerican Airlines
Deal found 7/2$768
This United 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/176:00 amONT - OPO
3 stops43h 35mMultiple Airlines
jue. 8/2112:10 pmOPO - ONT
2 stops18h 20mMultiple Airlines
Deal found 7/2$1,702
This British Airways 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 7/2610:53 amONT - OPO
2 stops16h 47mBritish Airways
jue. 7/3112:20 pmOPO - ONT
2 stops18h 37mBritish Airways
Deal found 7/2$2,983
This Air Canada deal was found by Cheapflights users on 7/3. 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.
mié. 9/175:10 amONT - OPO
2 stops20h 10mAir Canada
dom. 9/2811:20 amOPO - ONT
2 stops17h 04mAir Canada
Deal found 7/3$4,543

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Porto 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 3, 2025.
Use the filters below to find and compare flights from Ontario to Porto that are best for you.

Fly from

Ontario

Fly to

Porto

Route

Depart

Return

Price

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

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

OntarioPorto

ONT - OPO

ONTOPO

Ontario

dom. 8/17

10:50 am-3:55 pm

2 stops21h 05m

Porto

jue. 8/21

12:20 pm-12:08 am

2 stops19h 48m

$768

OntarioPorto

ONT - OPO

ONTOPO

Ontario

dom. 8/17

6:00 am-9:35 am

3 stops43h 35m

Porto

jue. 8/21

12:10 pm-10:30 pm

2 stops18h 20m

$1,702

OntarioPorto

ONT - OPO

ONTOPO

Ontario

sáb. 7/26

10:53 am-11:40 am

2 stops16h 47m

Porto

jue. 7/31

12:20 pm-10:57 pm

2 stops18h 37m

$2,983

OntarioPorto

ONT - OPO

ONTOPO

Ontario

mié. 9/17

5:10 am-9:20 am

2 stops20h 10m

Porto

dom. 9/28

11:20 am-8:24 pm

2 stops17h 04m

$4,543

OntarioPorto

ONT - OPO

ONTOPO

Ontario

mar. 8/12

7:00 am-9:45 am

2 stops18h 45m

$409

OntarioPorto

ONT - OPO

ONTOPO

Ontario

sáb. 7/12

6:28 pm-9:35 am

2 stops55h 07m

$410

OntarioPorto

ONT - OPO

ONTOPO

Ontario

jue. 10/16

2:46 pm-3:55 pm

2 stops17h 09m

$467

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 11 results
1
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Best time to book a flight from Ontario to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto 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 Porto

What is the cheapest month to book a flight from Ontario to Porto?

Currently, January is the cheapest month in which you can book a flight from Ontario to Porto (average of $523). Flying from Ontario to Porto in June is currently the most expensive (average of $1,033). 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 OPO?

Find hourly flight availability from Ontario to Porto. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 3, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Porto as you normally would.

Reviews of airlines servicing Porto

Get insights into the airlines that provide service to Porto. 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 Porto. Reviews last updated julio 3, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines from Ontario to Porto by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

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
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

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
7,982 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

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
7,982 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

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
7.1
Good
9,681 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

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.
Iberia
7.0
Good
2,820 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

7.9

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 Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Ontario to Porto round-trip?

    Iberia, at $633, was found to be the cheapest airline from Ontario to Porto.Alternate airlines to your destination round-trip include Delta and United Airlines.

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

    $409 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 Air Canada and Iberia, with prices starting from $410 and $467, respectively.

  • Can I find deals for flights from Ontario to Porto that include hotel bookings?

    Yes. In addition to deals on Ontario to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Porto?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Porto.

  • Can I find deals for business class flights from Ontario to Porto?

    Yes. Cheapflights offers flight deals from Ontario to Porto 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 Porto?

    Currently, January is the cheapest month in which you can book a flight from Ontario to Porto (average of $523). Flying from Ontario to Porto in June is currently the most expensive (average of $1,033). 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

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Aveiro
Coimbra
Matosinhos

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