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Portugal

$346+ 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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — LIS
Aug 29 — Sep 51
Sat 8/29
Sat 9/5
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 July 30, 2026.

This British Airways deal was found by Cheapflights users on 7/28. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/42:22 pm
ONT
-
OPO
2 stops19h 28m
British Airways
Wed 11/118:40 pm
OPO
-
ONT
2 stops21h 00m
British Airways
Deal found 7/28$755
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Wed 10/285:00 am
ONT
-
LIS
2 stops18h 55m
United Airlines
Wed 11/45:00 am
LIS
-
ONT
2 stops23h 15m
United Airlines
Deal found 7/28$761
This United Airlines deal was found by Cheapflights users on 7/26. 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 12/25:00 am
ONT
-
LIS
2 stops17h 55m
United Airlines
Wed 1/205:00 am
LIS
-
ONT
2 stops20h 47m
United Airlines
Deal found 7/26$762
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Tue 12/295:45 am
ONT
-
LIS
2 stops18h 25m
United Airlines
Wed 1/135:00 am
LIS
-
ONT
2 stops20h 47m
United Airlines
Deal found 7/27$764
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Sun 10/256:00 am
ONT
-
LIS
2 stops19h 10m
United Airlines
Wed 11/1810:15 am
LIS
-
ONT
2 stops18h 36m
United Airlines
Deal found 7/29$770
This Delta deal was found by Cheapflights users on 7/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2910:59 pm
ONT
-
OPO
2 stops27h 36m
Delta
Thu 1/75:00 am
OPO
-
ONT
2 stops26h 48m
Delta
Deal found 7/26$781
This Delta deal was found by Cheapflights users on 7/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3012:00 pm
ONT
-
OPO
2 stops38h 35m
Delta
Wed 1/611:15 am
OPO
-
ONT
2 stops36h 57m
Delta
Deal found 7/26$783
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Mon 12/285:00 am
ONT
-
LIS
2 stops21h 20m
United Airlines
Fri 1/811:20 am
LIS
-
ONT
2 stops39h 24m
United Airlines
Deal found 7/27$785
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Mon 12/285:00 am
ONT
-
OPO
2 stops20h 30m
United Airlines
Wed 1/66:00 am
OPO
-
ONT
2 stops44h 44m
United Airlines
Deal found 7/26$787
This Delta deal was found by Cheapflights users on 7/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/285:05 pm
ONT
-
OPO
2 stops57h 30m
Delta
Thu 1/75:00 am
OPO
-
ONT
2 stops26h 48m
Delta
Deal found 7/26$788
This United Airlines deal was found by Cheapflights users on 7/26. 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.
Sat 12/266:00 am
ONT
-
LIS
2 stops43h 20m
United Airlines
Fri 1/811:20 am
LIS
-
ONT
2 stops39h 24m
United Airlines
Deal found 7/26$789
This United Airlines deal was found by Cheapflights users on 7/27. 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.
Mon 12/285:00 am
ONT
-
LIS
2 stops21h 20m
United Airlines
Thu 1/711:20 am
LIS
-
ONT
2 stops41h 00m
United Airlines
Deal found 7/27$790

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 July 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$755
(British Airways)

One-way from

$346
(United Airlines)

Popular in

July

Cheapest in

January

Average price

$1,169
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. 25% potential increase in price ($290 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 30, 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

Sun 10/25

6:00 am-8:10 am

2 stops19h 10m

Lisbon Humberto Delgado

Wed 11/18

10:15 am-8:51 pm

2 stops18h 36m

$770

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 10/7

6:00 am-2:55 pm

2 stops24h 55m

Lisbon Humberto Delgado

Thu 10/15

5:00 am-10:43 pm

2 stops25h 43m

$824

OntarioPonta Delgada

ONT - PDL

ONTPDL

Ontario

Sun 8/16

6:00 am-8:40 am

2 stops19h 40m

Ponta Delgada Nordela

Tue 9/1

11:00 am-8:01 pm

2 stops16h 01m

$831

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Thu 12/31

6:45 am-9:20 am

2 stops18h 35m

Lisbon Humberto Delgado

Thu 1/7

11:20 am-6:44 pm

2 stops39h 24m

$844
Quickest round-trip

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Thu 12/31

6:45 am-8:10 am

2 stops17h 25m

Lisbon Humberto Delgado

Fri 1/8

10:15 am-8:20 pm

2 stops18h 05m

$855

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Thu 12/31

7:00 am-10:35 am

2 stops19h 35m

Porto

Tue 1/5

11:30 am-11:27 am

2 stops55h 57m

$856

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sun 11/1

6:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Wed 11/11

10:15 am-8:51 pm

2 stops18h 36m

$872

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Thu 10/8

6:20 am-11:15 am

2 stops20h 55m

Lisbon Humberto Delgado

Fri 10/16

5:35 am-10:43 pm

2 stops25h 08m

$891

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 10/6

6:00 am-8:20 am

2 stops18h 20m

Lisbon Humberto Delgado

Thu 10/29

6:10 am-8:51 pm

2 stops21h 41m

$906

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sat 9/12

1:56 pm-7:00 am

2 stops57h 04m

Porto

Thu 9/24

11:50 am-10:49 pm

2 stops42h 59m

$921

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

Showing 1-10 of 60 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

No data available for this route at this time. Please check back soon.

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 July 30, 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
7.8
Good
8,494 reviews

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Overall

7.8

Crew

8.5

Food

7.2

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
7.8
Good
8,494 reviews
Delta
7.8
Good
8,494 reviews

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Overall

7.8

Crew

8.5

Food

7.2

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
10,052 reviews
Delta
7.8
Good
8,494 reviews

Comfort

7.8

Entertainment

7.8

Boarding

8.1

Overall

7.8

Crew

8.5

Food

7.2

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 $1,011. Airlines will cover a distance of 5759 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.

See more FAQs

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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 July 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$515Average$1,177FlexibilityNo cancel feeOn-time69%
DeltaCheapest$582Average$1,282FlexibilityNo cancel feeOn-timeN/A

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