HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto

$475+ 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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — OPO
Dec 7 — Dec 141
Sat 12/7
Sat 12/14
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Porto with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 December 2, 2024.

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 December 2, 2024.

This Gotogate deal was found by Cheapflights users on 12/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2512:36 pmONT - OPO
2 stops19h 29mMultiple Airlines
Tue 12/316:00 amOPO - ONT
2 stops24h 29mMultiple Airlines
Deal found 12/1$1,735
This United Airlines deal was found by Cheapflights users on 12/1. 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.
Mon 12/210:35 amONT - OPO
2 stops20h 50mUnited Airlines
Thu 12/1912:30 pmOPO - ONT
2 stops18h 30mUnited Airlines
Deal found 12/1$1,881
This KAYAK deal was found by Cheapflights users on 12/2. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2211:59 pmONT - OPO
2 stops47h 41mBritish Airways
Wed 1/86:30 pmOPO - ONT
2 stops37h 28mBritish Airways
Deal found 12/2$2,138
This Iberia deal was found by Cheapflights users on 12/2. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2710:46 amONT - OPO
2 stops25h 14mIberia
Tue 1/78:40 pmOPO - ONT
2 stops33h 36mIberia
Deal found 12/2$2,517

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 2,650,959 searches. Data last updated December 2, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Thu 1/16

7:05 am-10:50 am

2 stops19h 45m

Porto

Mon 1/20

4:10 pm-4:28 pm

2 stops32h 18m

$782

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Thu 2/20

5:05 am-11:35 am

3 stops22h 30m

Porto

Tue 3/11

6:00 am-8:57 pm

2 stops21h 57m

$805

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Thu 1/16

10:47 am-12:50 pm

2 stops18h 03m

Porto

Mon 1/20

6:00 am-8:51 pm

3 stops22h 51m

$821

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Tue 4/1

3:08 pm-3:55 pm

2 stops16h 47m

Porto

Wed 4/9

12:20 pm-11:42 pm

2 stops19h 22m

$1,173

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Mon 5/12

1:32 pm-7:35 pm

2 stops22h 03m

Porto

Mon 5/19

12:20 pm-11:35 pm

2 stops19h 15m

$1,423

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Tue 5/13

5:45 am-7:00 pm

3 stops29h 15m

$475

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 4/16

6:02 am-9:45 am

2 stops19h 43m

$747

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sun 3/2

2:44 pm-4:00 pm

2 stops17h 16m

$1,094

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

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 December.
ProviderPrice AccuracyTrust Score*
AranGrantPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Ontario-Porto flight deals on Cheapflights vs. AranGrant >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 eDreams the most. eDreams 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 $1,000). 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 December 2, 2024.

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 December 2, 2024.
KLM
7.8
Good
1,343 reviews

Overall

7.8

Crew

8.4

Boarding

7.9

Comfort

7.7

Food

7.3

Entertainment

7.2

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

KLM
7.8
Good
1,343 reviews
KLM
7.8
Good
1,343 reviews

Overall

7.8

Crew

8.4

Boarding

7.9

Comfort

7.7

Food

7.3

Entertainment

7.2

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

United Airlines
7.4
Good
9,141 reviews
KLM
7.8
Good
1,343 reviews

Overall

7.8

Crew

8.4

Boarding

7.9

Comfort

7.7

Food

7.3

Entertainment

7.2

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

Iberia
7.0
Good
2,666 reviews
KLM
7.8
Good
1,343 reviews

Overall

7.8

Crew

8.4

Boarding

7.9

Comfort

7.7

Food

7.3

Entertainment

7.2

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

British Airways
6.7
Okay
6,832 reviews
KLM
7.8
Good
1,343 reviews

Overall

7.8

Crew

8.4

Boarding

7.9

Comfort

7.7

Food

7.3

Entertainment

7.2

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

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.

  • 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 $1,000). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Porto

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Lisbon flights
San Francisco to Lisbon flights
San Jose to Lisbon flights
Ontario to Lisbon flights
San Diego to Lisbon flights
Los Angeles to Porto flights
San Francisco to Porto flights
Sacramento to Lisbon flights
Las Vegas to Lisbon flights
San Francisco to Faro flights
San Francisco to Lajes flights
Los Angeles to Faro flights
Oakland to Lisbon flights
San Francisco to Funchal flights
San Jose to Porto flights
Los Angeles to Funchal flights
Los Angeles to Ponta Delgada flights
San Francisco to Ponta Delgada flights
Santa Ana to Lisbon flights
San Diego to Porto flights
Sacramento to Porto flights
Los Angeles to Lajes flights
Santa Ana to Porto flights
Santa Rosa to Lisbon flights
San Jose to Lajes flights
San Francisco to Pico Island flights
Palm Springs to Lisbon flights
Burbank to Lisbon flights
Fresno to Lisbon flights
Las Vegas to Funchal flights
San Jose to Faro flights
San Jose to Funchal flights
Reno to Lisbon flights
Ontario to Faro flights
San Francisco to Horta flights
San Jose to Ponta Delgada flights
San Diego to Faro flights
Long Beach to Lisbon flights
Ontario to Ponta Delgada flights
Monterey to Lisbon flights
Oakland to Funchal flights
San Diego to Ponta Delgada flights
Burbank to Faro flights
Burbank to Porto flights
Oakland to Ponta Delgada flights
Oakland to Porto flights
Las Vegas to Faro flights
San Francisco to Porto Santo flights
Santa Ana to Faro flights
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines