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$585+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OPO
mar. 13 — mar. 201
jue. 3/13
jue. 3/20
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 marzo 8, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$778
(United)

One-way from

$585
(United Airlines)

Popular in

July

Cheapest in

February

Average price

$970
Provider with most accurate pricing for Ontario-Porto flight deals.
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Provider most trusted by Cheapflights users for Ontario-Porto flights.
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From Ontario to Porto
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One-way flight from Ontario to Porto
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Highest demand for flights based on searches. 15% potential increase in price ($176 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in March 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 marzo 8, 2025.

This United Airlines deal was found by Cheapflights users on 3/7. 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.
dom. 12/286:00 amONT - OPO
2 stops25h 15mUnited Airlines
jue. 1/812:30 pmOPO - ONT
2 stops40h 51mUnited Airlines
Deal found 3/7$679
This United deal was found by Cheapflights users on 3/6. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/233:55 pmONT - OPO
2 stops23h 25mMultiple Airlines
dom. 4/2712:10 pmOPO - ONT
2 stops18h 45mMultiple Airlines
Deal found 3/6$778
This Delta deal was found by Cheapflights users on 3/6. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/121:30 pmONT - OPO
2 stops18h 55mDelta
mié. 3/266:00 amOPO - ONT
2 stops23h 43mDelta
Deal found 3/6$796
This British Airways deal was found by Cheapflights users on 3/7. 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. 3/252:54 pmONT - OPO
2 stops19h 46mBritish Airways
lun. 3/319:10 pmOPO - ONT
2 stops29h 51mBritish Airways
Deal found 3/7$920
This Ovago deal was found by Cheapflights users on 3/7. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/203:00 pmONT - OPO
2 stops32h 35mIberia
dom. 9/2812:20 pmOPO - ONT
2 stops19h 16mIberia
Deal found 3/7$949
This American Airlines deal was found by Cheapflights users on 3/7. 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.
vie. 5/22:44 pmONT - OPO
2 stops17h 11mAmerican Airlines
jue. 5/158:15 amOPO - ONT
2 stops18h 21mAmerican Airlines
Deal found 3/7$2,171

Find flights from Ontario to Porto within your budget

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 marzo 8, 2025.

Fly from

Ontario

Fly to

Porto

Route

Depart

Return

Price

OntarioPorto

ONT - OPO

ONTOPO

Ontario

mié. 4/23

3:55 pm-11:20 pm

2 stops23h 25m

Porto

dom. 4/27

12:10 pm-10:55 pm

2 stops18h 45m

$778

OntarioPorto

ONT - OPO

ONTOPO

Ontario

mié. 8/27

7:00 am-9:30 am

2 stops18h 30m

Porto

mar. 9/2

12:15 pm-10:53 pm

2 stops18h 38m

$810

OntarioPorto

ONT - OPO

ONTOPO

Ontario

mar. 3/25

2:54 pm-5:40 pm

2 stops19h 46m

Porto

lun. 3/31

9:10 pm-7:01 pm

2 stops29h 51m

$920

OntarioPorto

ONT - OPO

ONTOPO

Ontario

lun. 8/4

2:40 pm-3:55 pm

2 stops17h 15m

Porto

lun. 8/11

12:20 pm-11:29 pm

2 stops19h 09m

$1,044

OntarioPorto

ONT - OPO

ONTOPO

Ontario

vie. 5/2

2:44 pm-3:55 pm

2 stops17h 11m

Porto

jue. 5/15

8:15 am-6:36 pm

2 stops18h 21m

$2,171

OntarioPorto

ONT - OPO

ONTOPO

Ontario

lun. 3/17

5:05 am-3:25 pm

2 stops27h 20m

$585

OntarioPorto

ONT - OPO

ONTOPO

Ontario

sáb. 4/26

10:54 am-10:50 am

2 stops39h 56m

$594

OntarioPorto

ONT - OPO

ONTOPO

Ontario

lun. 5/5

2:44 pm-7:35 am

2 stops32h 51m

$686

OntarioPorto

ONT - OPO

ONTOPO

Ontario

mar. 6/10

6:41 pm-9:30 am

2 stops30h 49m

$741

OntarioPorto

ONT - OPO

ONTOPO

Ontario

jue. 4/10

7:00 am-8:10 pm

2 stops29h 10m

$987

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/6

Showing 1-10 of 12 results
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2

Compare providers for flights from Ontario to Porto

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Porto in March.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Porto flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Porto flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Porto flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Porto flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Porto flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Travel insights for flights from Ontario to Porto

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

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 $1,088). 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 marzo 8, 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.

Rainfall in Porto by month

Plan your trip to Porto by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

Temperature in Porto by month

Plan your trip to Porto by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Porto, 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 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

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 marzo 8, 2025.
Read reviews from past customers who have flown Delta, United Airlines and American Airlines from Ontario to Porto. 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
8,024 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

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
8,024 reviews
Delta
8.0
Very good
8,024 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

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
8,649 reviews
Delta
8.0
Very good
8,024 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

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
8,024 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

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 Canada
7.0
Good
8,854 reviews
Delta
8.0
Very good
8,024 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

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.

Iberia
7.0
Good
2,640 reviews
Delta
8.0
Very good
8,024 reviews

Boarding

8.2

Comfort

8.0

Entertainment

7.9

Overall

8.0

Food

7.3

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 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 to fly from Ontario to Porto one-way?

    $585 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 Iberia, with prices starting from $594 and $686, 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 $1,088). 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
Arcos de Valdevez

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