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Portugal

$368+ 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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
1 adult, Economy
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Cheap 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 March 23, 2026.

This United Airlines deal was found by Cheapflights users on 3/19. 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.
Fri 12/45:00 am
ONT
-
LIS
3 stops21h 15m
United Airlines
Tue 12/86:10 am
LIS
-
ONT
2 stops24h 56m
United Airlines
Deal found 3/19$671
This oojo deal was found by Cheapflights users on 3/21. 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.
Fri 11/2712:55 pm
ONT
-
LIS
2 stops21h 00m
British Airways
Sat 12/127:00 am
LIS
-
ONT
2 stops24h 55m
British Airways
Deal found 3/21$680
This United Airlines deal was found by Cheapflights users on 3/22. 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.
Wed 10/286:02 am
ONT
-
LIS
2 stops19h 08m
United Airlines
Mon 11/911:55 am
LIS
-
ONT
2 stops19h 11m
United Airlines
Deal found 3/22$681
This Iberia deal was found by Cheapflights users on 3/18. 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.
Tue 4/212:08 pm
ONT
-
LIS
2 stops20h 17m
Iberia
Wed 5/66:35 am
LIS
-
ONT
2 stops25h 11m
Iberia
Deal found 3/18$695
This Trip.com deal was found by Cheapflights users on 3/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2512:49 pm
ONT
-
LIS
2 stops21h 56m
KLM
Fri 5/85:00 am
LIS
-
ONT
2 stops20h 10m
KLM
Deal found 3/21$698
This KAYAK deal was found by Cheapflights users on 3/18. 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.
Sat 4/252:08 pm
ONT
-
LIS
2 stops20h 17m
Iberia
Sat 5/24:45 pm
LIS
-
ONT
2 stops39h 01m
Iberia
Deal found 3/18$725
This Delta deal was found by Cheapflights users on 3/18. 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.
Wed 10/217:00 am
ONT
-
LIS
2 stops17h 00m
Delta
Sun 11/15:30 am
LIS
-
ONT
2 stops20h 48m
Delta
Deal found 3/18$728
This Air France deal was found by Cheapflights users on 3/21. 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/227:00 am
ONT
-
LIS
2 stops20h 15m
Multiple Airlines
Tue 9/295:00 am
LIS
-
ONT
2 stops21h 01m
Multiple Airlines
Deal found 3/21$730
This Delta deal was found by Cheapflights users on 3/22. 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.
Tue 9/2211:55 am
ONT
-
LIS
2 stops21h 55m
Delta
Tue 9/295:35 am
LIS
-
ONT
2 stops25h 05m
Delta
Deal found 3/22$737
This KLM deal was found by Cheapflights users on 3/22. 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.
Mon 10/52:00 pm
ONT
-
OPO
2 stops17h 30m
KLM
Fri 10/165:55 am
OPO
-
ONT
2 stops19h 22m
KLM
Deal found 3/22$739
This KLM deal was found by Cheapflights users on 3/22. 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.
Wed 4/225:05 pm
ONT
-
OPO
2 stops21h 10m
KLM
Wed 5/65:55 am
OPO
-
ONT
2 stops23h 05m
KLM
Deal found 3/22$744
This United Airlines deal was found by Cheapflights users on 3/22. 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.
Tue 9/225:00 am
ONT
-
LIS
3 stops22h 00m
United Airlines
Tue 9/2911:25 am
LIS
-
ONT
2 stops56h 55m
United Airlines
Deal found 3/22$748

Find flight deals from Ontario to Portugal

Keep the following information in mind while searching for Ontario to Portugal flight deals. Data was last updated March 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$695
(Iberia)

One-way from

$368
(United Airlines)

Popular in

June

Cheapest in

January

Average price

$709
Provider with most accurate pricing for Los Angeles Los Angeles-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles Los Angeles-Lisbon Humberto Delgado flights.
Search Deals
From Ontario to Portugal
Search Deals
One-way flight from Ontario to Portugal
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($222 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 23, 2026.
Use the filters below to find and compare flights from Ontario to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 8/10

5:45 am-8:20 am

2 stops18h 35m

Lisbon Humberto Delgado

Wed 8/19

10:25 am-9:59 pm

2 stops19h 34m

$791

OntarioFaro

ONT - FAO

ONTFAO

Ontario

Tue 5/5

7:00 am-3:30 pm

2 stops24h 30m

Faro

Tue 5/12

8:15 pm-5:10 pm

2 stops28h 55m

$794

OntarioFaro

ONT - FAO

ONTFAO

Ontario

Thu 4/16

7:00 am-2:30 pm

2 stops23h 30m

Faro

Wed 4/22

3:25 pm-8:36 pm

2 stops37h 11m

$795

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Thu 4/16

7:00 am-10:30 am

2 stops19h 30m

Lisbon Humberto Delgado

Mon 5/4

1:00 pm-12:38 pm

2 stops31h 38m

$800

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sun 5/3

11:53 am-6:10 pm

2 stops22h 17m

Porto

Sun 5/10

5:55 am-6:36 pm

2 stops20h 41m

$844

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Mon 9/7

5:45 am-6:55 am

2 stops41h 10m

Porto

Thu 10/15

11:50 am-11:06 pm

2 stops43h 16m

$848

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Fri 9/18

7:00 am-11:00 am

2 stops44h 00m

Lisbon Humberto Delgado

Mon 10/5

11:25 am-12:20 pm

2 stops56h 55m

$849

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sat 9/5

5:55 pm-7:15 pm

2 stops41h 20m

Porto

Wed 10/14

5:00 am-4:12 pm

2 stops19h 12m

$858

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Fri 8/21

7:13 pm-11:00 am

2 stops31h 47m

Lisbon Humberto Delgado

Wed 9/9

11:25 am-6:19 pm

2 stops38h 54m

$862

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 9/15

10:56 pm-3:45 pm

2 stops56h 49m

Lisbon Humberto Delgado

Wed 9/30

5:55 am-9:29 pm

2 stops47h 34m

$874

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/22

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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 $431). Flying from Ontario to Portugal in June is currently the most expensive (average of $712). 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 March 23, 2026.
See what other customers who have flown with Delta and 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.
Delta
7.9
Good
8,319 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

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
7.9
Good
8,319 reviews
Delta
7.9
Good
8,319 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

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
9,460 reviews
Delta
7.9
Good
8,319 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

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.

  • How long is the flight from Ontario to Portugal?

    A quick flight from Ontario to Portugal can take about 18h 35m. KLM provides one of the quickest options available for as low as $791. 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 - Ponta Delgada Nordela 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 $431). Flying from Ontario to Portugal in June is currently the most expensive (average of $712). 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.

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Top 2 airlines flying from Ontario to Portugal

Discover the top 2 airlines 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 March 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$515Average$727FlexibilityNo cancel feeOn-time69%
DeltaCheapest$582Average$844FlexibilityNo cancel feeOn-timeN/A

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