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Cheap flights from Ontario to Portugal from $381

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Portugal departing on 7/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Ontario to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Iberia Logo
2:08 pm - 6:25 pm
ONT
-
LIS
20h 17m
2 stops
Iberia Logo
6:35 am - 11:46 pm
LIS
-
ONT
25h 11m
2 stops
$695Iberia
Tue, Apr 21 - Wed, May 6
KLM Logo
12:49 pm - 6:45 pm
ONT
-
LIS
21h 56m
2 stops
KLM Logo
5:00 am - 5:10 pm
LIS
-
ONT
20h 10m
2 stops
$698KLM
Sat, Apr 25 - Fri, May 8
Iberia Logo
2:08 pm - 6:25 pm
ONT
-
LIS
20h 17m
2 stops
Iberia Logo
4:45 pm - 11:46 pm
LIS
-
ONT
39h 01m
2 stops
$725Iberia
Sat, Apr 25 - Sat, May 2
British Airways Logo
4:52 pm - 11:10 pm
ONT
-
LIS
22h 18m
2 stops
British Airways Logo
7:20 am - 9:07 pm
LIS
-
ONT
21h 47m
2 stops
$755British Airways
Mon, May 4 - Wed, May 13
Delta Logo
2:20 pm - 10:00 pm
ONT
-
OPO
23h 40m
2 stops
Delta Logo
5:00 am - 10:34 pm
OPO
-
ONT
25h 34m
2 stops
$787Delta
Wed, May 6 - Wed, May 13
United Airlines Logo
5:45 am - 8:20 am
ONT
-
LIS
18h 35m
2 stops
United Airlines Logo
10:25 am - 9:59 pm
LIS
-
ONT
19h 34m
2 stops
$791United Airlines
Mon, Aug 10 - Wed, Aug 19
United Airlines Logo
7:00 am - 2:30 pm
ONT
-
FAO
23h 30m
2 stops
United Airlines Logo
3:25 pm - 8:36 pm
FAO
-
ONT
37h 11m
2 stops
$795United Airlines
Thu, Apr 16 - Wed, Apr 22
Delta Logo
10:59 pm - 8:00 am
ONT
-
LIS
49h 01m
2 stops
Delta Logo
5:35 am - 4:12 pm
LIS
-
ONT
18h 37m
2 stops
$799Delta
Fri, Sep 18 - Tue, Oct 6
British Airways Logo
12:19 pm - 11:00 pm
ONT
-
LIS
26h 41m
2 stops
British Airways Logo
7:10 am - 10:36 pm
LIS
-
ONT
23h 26m
2 stops
$804British Airways
Tue, Apr 21 - Tue, Apr 28
American Airlines Logo
2:08 pm - 4:00 pm
ONT
-
OPO
17h 52m
2 stops
American Airlines Logo
12:25 pm - 11:46 pm
OPO
-
ONT
19h 21m
2 stops
$866American Airlines
Mon, Apr 13 - Wed, Apr 22

Iberia flights from Ontario to Portugal

Our best Iberia deals on Ontario to Portugal flight tickets
Iberia
Apr 21
ONT2:08 pmOntario
20h 17m
2 stops
LIS6:25 pmLisbon Humberto Delgado
May 6
LIS6:35 amLisbon Humberto Delgado
25h 11m
2 stops
ONT11:46 pmOntario
$695
Iberia
Apr 25
ONT2:08 pmOntario
20h 17m
2 stops
LIS6:25 pmLisbon Humberto Delgado
May 2
LIS4:45 pmLisbon Humberto Delgado
39h 01m
2 stops
ONT11:46 pmOntario
$725
Iberia
Apr 24
ONT10:59 amOntario
28h 26m
2 stops
LIS11:25 pmLisbon Humberto Delgado
May 8
LIS8:25 amLisbon Humberto Delgado
23h 21m
2 stops
ONT11:46 pmOntario
$761

KLM flights from Ontario to Portugal

Our best KLM deals on Ontario to Portugal flight tickets
KLM
Apr 25
ONT12:49 pmOntario
21h 56m
2 stops
LIS6:45 pmLisbon Humberto Delgado
May 8
LIS5:00 amLisbon Humberto Delgado
20h 10m
2 stops
ONT5:10 pmOntario
$698
KLM
Apr 22
ONT5:05 pmOntario
21h 10m
2 stops
OPO10:15 pmPorto
May 6
OPO5:55 amPorto
23h 05m
2 stops
ONT9:00 pmOntario
$744
KLM
Apr 25
ONT12:49 pmOntario
21h 56m
2 stops
LIS6:45 pmLisbon Humberto Delgado
May 8
LIS5:00 amLisbon Humberto Delgado
20h 10m
2 stops
ONT5:10 pmOntario
$754

momondo 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, momondo users made 832,500 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

Tue 4/21

2:08 pm-6:25 pm

2 stops20h 17m

Lisbon Humberto Delgado

Wed 5/6

6:35 am-11:46 pm

2 stops25h 11m

$695

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sat 4/25

12:49 pm-6:45 pm

2 stops21h 56m

Lisbon Humberto Delgado

Fri 5/8

5:00 am-5:10 pm

2 stops20h 10m

$698

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sat 4/25

2:08 pm-6:25 pm

2 stops20h 17m

Lisbon Humberto Delgado

Sat 5/2

4:45 pm-11:46 pm

2 stops39h 01m

$725

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Mon 5/4

4:52 pm-11:10 pm

2 stops22h 18m

Lisbon Humberto Delgado

Wed 5/13

7:20 am-9:07 pm

2 stops21h 47m

$755

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 5/6

2:20 pm-10:00 pm

2 stops23h 40m

Porto

Wed 5/13

5:00 am-10:34 pm

2 stops25h 34m

$787

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

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

Fri 9/18

10:59 pm-8:00 am

2 stops49h 01m

Lisbon Humberto Delgado

Tue 10/6

5:35 am-4:12 pm

2 stops18h 37m

$799

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Tue 4/21

12:19 pm-11:00 pm

2 stops26h 41m

Lisbon Humberto Delgado

Tue 4/28

7:10 am-10:36 pm

2 stops23h 26m

$804
Quickest round-trip

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Mon 4/13

2:08 pm-4:00 pm

2 stops17h 52m

Porto

Wed 4/22

12:25 pm-11:46 pm

2 stops19h 21m

$866

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Portugal from

How to get the cheapest flight ticket from Ontario to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Ontario to Portugal?

United Airlines, Delta, and British Airways are the most popular carriers operating from Ontario to Portugal

What airlines fly to Portugal?

TAP AIR PORTUGAL, United Airlines and British Airways are the top three most popular airlines that fly to Portugal from Ontario according to our data. TAP AIR PORTUGAL is the first choice among our users, with 43% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 16 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.

Cheap Ontario to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Portugal

Fastest flight time

16h 30m

Direct flights

None
The fastest flight from Ontario to Portugal takes 16h 30m
There are no direct flights from Ontario to Portugal. There are no popular flight routes from Ontario to Portugal.
Search flight deals

  • When did momondo last update prices for flights from Ontario Airport to Portugal?

    Prices for flights from Ontario Airport to Portugal are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to Portugal?

  • How old do you have to be to fly from Ontario Airport to Portugal?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The travel and health documents you'll need for your trip to Portugal may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Portugal. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ontario to Portugal

Compare and see reviews for airlines that fly from Ontario to Portugal with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $515Free CancellationRating
7.4
9,462 reviews
Search United Airlines flights
DeltaPriceFrom $582Free CancellationRating
7.9
8,319 reviews
Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Portugal?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Portugal. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Portugal with flexible booking policies on momondo?

All flight searches from Ontario to Portugal on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Portugal?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Ontario to Portugal.

I’m not ready to book a flight from Ontario to Portugal right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Portugal, momondo offers a useful price alert feature which will track prices for flights to Portugal from Ontario and alert you when they change.

An easier way to manage your Portugal trip

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Find better results for your trip to Portugal

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