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Portugal

$276+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
Apr 1 — Apr 81
Wed 4/1
Wed 4/8
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 2, 2026.

This Finnair deal was found by Cheapflights users on 3/2. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/252:08 pm
ONT
-
LIS
2 stops25h 17m
Multiple Airlines
Fri 5/86:35 am
LIS
-
ONT
2 stops25h 11m
Multiple Airlines
Deal found 3/2$528
This United Airlines deal was found by Cheapflights users on 2/28. 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 11/37:00 am
ONT
-
LIS
2 stops17h 10m
United Airlines
Mon 11/911:55 am
LIS
-
ONT
2 stops19h 11m
United Airlines
Deal found 2/28$532
This Iberia deal was found by Cheapflights users on 2/28. 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 11/610:47 am
ONT
-
LIS
2 stops20h 03m
Multiple Airlines
Wed 11/1110:40 am
LIS
-
ONT
2 stops21h 17m
Multiple Airlines
Deal found 2/28$546
This United Airlines deal was found by Cheapflights users on 3/2. 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.
Mon 11/27:00 am
ONT
-
OPO
2 stops18h 30m
United Airlines
Wed 11/1112:30 pm
OPO
-
ONT
2 stops18h 36m
United Airlines
Deal found 3/2$547
This oojo deal was found by Cheapflights users on 2/27. 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.
Tue 4/74:52 pm
ONT
-
LIS
2 stops22h 08m
British Airways
Thu 5/77:20 am
LIS
-
ONT
2 stops21h 47m
British Airways
Deal found 2/27$556
This United Airlines deal was found by Cheapflights users on 2/26. 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 3/45:00 am
ONT
-
LIS
2 stops21h 15m
United Airlines
Sun 3/811:55 am
LIS
-
ONT
2 stops41h 41m
United Airlines
Deal found 2/26$568
This Iberia deal was found by Cheapflights users on 2/28. 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 4/2810:59 am
ONT
-
LIS
2 stops23h 26m
Iberia
Tue 5/128:45 pm
LIS
-
ONT
2 stops33h 51m
Iberia
Deal found 2/28$570
This oojo deal was found by Cheapflights users on 2/28. 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.
Mon 4/2712:19 pm
ONT
-
LIS
2 stops37h 46m
British Airways
Thu 5/73:00 pm
LIS
-
ONT
2 stops33h 22m
British Airways
Deal found 2/28$577
This oojo deal was found by Cheapflights users on 2/26. 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 4/2412:19 pm
ONT
-
LIS
2 stops26h 51m
British Airways
Fri 5/157:20 am
LIS
-
ONT
2 stops22h 39m
British Airways
Deal found 2/26$586
This oojo deal was found by Cheapflights users on 2/26. 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.
Sat 4/2510:54 am
ONT
-
LIS
2 stops21h 26m
British Airways
Fri 5/157:20 am
LIS
-
ONT
2 stops41h 02m
British Airways
Deal found 2/26$592
This Ovago deal was found by Cheapflights users on 2/27. 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.
Mon 4/2712:19 pm
ONT
-
LIS
2 stops26h 51m
Multiple Airlines
Tue 5/126:35 am
LIS
-
ONT
2 stops22h 19m
Multiple Airlines
Deal found 2/27$593
This United Airlines deal was found by Cheapflights users on 2/27. 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 9/305:00 am
ONT
-
OPO
2 stops18h 00m
United Airlines
Wed 10/76:00 am
OPO
-
ONT
2 stops19h 18m
United Airlines
Deal found 2/27$607

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 2, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$528
(Finnair)

One-way from

$276
(United Airlines)

Popular in

June

Cheapest in

January

Average price

$696
Provider with most accurate pricing for Los Angeles-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for 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 ($227 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($32 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 2, 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

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 4/14

6:05 am-8:20 am

2 stops18h 15m

Lisbon Humberto Delgado

Tue 4/21

6:15 am-10:31 pm

2 stops24h 16m

$612

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 4/28

10:59 am-3:35 pm

2 stops20h 36m

Lisbon Humberto Delgado

Tue 5/12

6:45 pm-6:37 pm

2 stops31h 52m

$634

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 4/14

6:05 am-8:20 am

2 stops18h 15m

Lisbon Humberto Delgado

Mon 4/20

11:25 am-12:38 pm

2 stops33h 13m

$641

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Fri 4/10

12:19 pm-11:10 pm

2 stops26h 51m

Lisbon Humberto Delgado

Thu 4/16

4:30 pm-9:59 pm

2 stops37h 29m

$656

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 4/27

2:08 pm-5:55 pm

2 stops19h 47m

Lisbon Humberto Delgado

Tue 5/12

8:45 pm-10:36 pm

2 stops33h 51m

$725

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 4/15

6:05 am-8:20 am

2 stops18h 15m

Lisbon Humberto Delgado

Tue 4/21

10:25 am-8:36 pm

2 stops18h 11m

$807

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Tue 3/24

1:20 pm-10:25 pm

2 stops26h 05m

Porto

Fri 5/1

11:25 am-11:44 pm

2 stops20h 19m

$818

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sun 3/22

11:59 pm-9:30 am

2 stops26h 31m

Porto

Wed 4/29

6:00 am-5:52 pm

3 stops43h 52m

$821

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 4/1

5:09 pm-10:50 pm

2 stops21h 41m

Lisbon Humberto Delgado

Mon 4/6

5:00 am-10:34 pm

2 stops25h 34m

$867

OntarioFaro

ONT - FAO

ONTFAO

Ontario

Sun 4/26

11:59 pm-2:55 pm

2 stops30h 56m

Faro

Thu 5/14

3:45 pm-6:37 pm

2 stops34h 52m

$917

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/27

Showing 1-10 of 59 resultsSorted by cheapest first
1
2
3
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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, May is the cheapest month in which you can book a flight from Ontario to Portugal (average of $404). Flying from Ontario to Portugal in June is currently the most expensive (average of $713). 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 2, 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
8,237 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

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
8,237 reviews
Delta
7.9
Good
8,237 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

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
9,375 reviews
Delta
7.9
Good
8,237 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Comfort

7.9

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 15m. United Airlines provides one of the quickest options available for as low as $612. 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 - 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, May is the cheapest month in which you can book a flight from Ontario to Portugal (average of $404). Flying from Ontario to Portugal in June is currently the most expensive (average of $713). 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 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$515Average$727FlexibilityNo cancel feeOn-time69%
DeltaCheapest$582Average$844FlexibilityNo cancel feeOn-timeN/A

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