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Cheap flights from Ontario to Portugal from $346

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 12/9. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:00 am - 8:10 am
ONT
-
LIS
20h 10m
2 stops
United Airlines Logo
11:20 am - 12:01 pm
LIS
-
ONT
32h 41m
2 stops
$755United Airlines
Sun, Oct 25 - Tue, Nov 10
Delta Logo
1:17 pm - 3:10 pm
ONT
-
LIS
18h 53m
2 stops
Delta Logo
5:00 am - 5:17 pm
LIS
-
ONT
20h 17m
2 stops
$759Delta
Wed, Oct 28 - Wed, Nov 11
United Airlines Logo
9:00 am - 10:20 am
ONT
-
LIS
17h 20m
2 stops
United Airlines Logo
6:10 am - 10:53 pm
LIS
-
ONT
24h 43m
2 stops
$760United Airlines
Wed, Nov 18 - Fri, Nov 27
Multiple Airlines Logo
10:47 am - 11:45 am
ONT
-
OPO
16h 58m
2 stops
Multiple Airlines Logo
8:40 pm - 9:57 am
OPO
-
ONT
21h 17m
2 stops
$760Multiple Airlines
Mon, Nov 16 - Wed, Nov 25
Delta Logo
11:15 pm - 8:00 am
ONT
-
LIS
25h 45m
2 stops
Delta Logo
11:15 am - 10:14 pm
LIS
-
ONT
18h 59m
2 stops
$771Delta
Sun, Oct 25 - Wed, Nov 11
Delta Logo
12:18 pm - 9:00 am
ONT
-
LIS
37h 42m
2 stops
Delta Logo
11:15 am - 10:14 pm
LIS
-
ONT
18h 59m
2 stops
$782Delta
Sat, Oct 31 - Wed, Nov 11
American Airlines Logo
10:29 am - 11:45 am
ONT
-
OPO
17h 16m
2 stops
American Airlines Logo
12:25 pm - 10:59 pm
OPO
-
ONT
18h 34m
2 stops
$867American Airlines
Mon, Aug 17 - Wed, Sep 2
Air Canada Logo
7:13 pm - 7:10 am
ONT
-
OPO
27h 57m
2 stops
Air Canada Logo
6:00 am - 8:01 pm
OPO
-
ONT
22h 01m
2 stops
$906Air Canada
Thu, Aug 13 - Thu, Aug 20
KLM Logo
11:56 am - 3:30 pm
ONT
-
OPO
19h 34m
2 stops
KLM Logo
7:55 pm - 5:21 pm
OPO
-
ONT
29h 26m
2 stops
$927KLM
Mon, Aug 24 - Mon, Aug 31
KLM Logo
5:10 pm - 7:30 pm
ONT
-
FAO
18h 20m
2 stops
KLM Logo
9:45 am - 10:52 pm
FAO
-
ONT
21h 07m
2 stops
$2,791KLM
Sun, Jul 12 - Tue, Jul 21

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Delta flights from Ontario to Portugal

Our best Delta deals on Ontario to Portugal flight tickets
Delta
Oct 28
ONT1:17 pmOntario
18h 53m
2 stops
LIS3:10 pmLisbon Humberto Delgado
Nov 11
LIS5:00 amLisbon Humberto Delgado
20h 17m
2 stops
ONT5:17 pmOntario
$759
Delta
Oct 31
ONT12:18 pmOntario
37h 42m
2 stops
LIS9:00 amLisbon Humberto Delgado
Nov 11
LIS11:15 amLisbon Humberto Delgado
18h 59m
2 stops
ONT10:14 pmOntario
$782
Delta
Oct 29
ONT1:17 pmOntario
18h 53m
2 stops
LIS3:10 pmLisbon Humberto Delgado
Nov 12
LIS5:00 amLisbon Humberto Delgado
21h 18m
2 stops
ONT6:18 pmOntario
$809

United Airlines flights from Ontario to Portugal

Our best United Airlines deals on Ontario to Portugal flight tickets
United Airlines
Oct 25
ONT5:00 amOntario
20h 10m
2 stops
LIS8:10 amLisbon Humberto Delgado
Nov 10
LIS11:20 amLisbon Humberto Delgado
32h 41m
2 stops
ONT12:01 pmOntario
$755
United Airlines
Nov 18
ONT9:00 amOntario
17h 20m
2 stops
LIS10:20 amLisbon Humberto Delgado
Nov 27
LIS6:10 amLisbon Humberto Delgado
24h 43m
2 stops
ONT10:53 pmOntario
$760
United Airlines
Oct 25
ONT5:00 amOntario
20h 10m
2 stops
LIS8:10 amLisbon Humberto Delgado
Nov 13
LIS10:15 amLisbon Humberto Delgado
18h 41m
2 stops
ONT8:56 pmOntario
$771

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 July 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

Cheapest round-trip

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sun 10/25

5:00 am-8:10 am

2 stops20h 10m

Lisbon Humberto Delgado

Tue 11/10

11:20 am-12:01 pm

2 stops32h 41m

$755

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 10/28

1:17 pm-3:10 pm

2 stops18h 53m

Lisbon Humberto Delgado

Wed 11/11

5:00 am-5:17 pm

2 stops20h 17m

$759

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Wed 11/18

9:00 am-10:20 am

2 stops17h 20m

Lisbon Humberto Delgado

Fri 11/27

6:10 am-10:53 pm

2 stops24h 43m

$760

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Mon 11/16

10:47 am-11:45 am

2 stops16h 58m

Porto

Wed 11/25

8:40 pm-9:57 am

2 stops21h 17m

$760

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sun 10/25

11:15 pm-8:00 am

2 stops25h 45m

Lisbon Humberto Delgado

Wed 11/11

11:15 am-10:14 pm

2 stops18h 59m

$771

OntarioLisbon

ONT - LIS

ONTLIS

Ontario

Sat 10/31

12:18 pm-9:00 am

2 stops37h 42m

Lisbon Humberto Delgado

Wed 11/11

11:15 am-10:14 pm

2 stops18h 59m

$782
Quickest round-trip

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Mon 8/17

10:29 am-11:45 am

2 stops17h 16m

Porto

Wed 9/2

12:25 pm-10:59 pm

2 stops18h 34m

$867

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Thu 8/13

7:13 pm-7:10 am

2 stops27h 57m

Porto

Thu 8/20

6:00 am-8:01 pm

2 stops22h 01m

$906

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Mon 8/24

11:56 am-3:30 pm

2 stops19h 34m

Porto

Mon 8/31

7:55 pm-5:21 pm

2 stops29h 26m

$927

OntarioFaro

ONT - FAO

ONTFAO

Ontario

Sun 7/12

5:10 pm-7:30 pm

2 stops18h 20m

Faro

Tue 7/21

9:45 am-10:52 pm

2 stops21h 07m

$2,791

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 month to fly to Portugal?

The cheapest month to fly to Portugal from Ontario is in December. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of December, then book flights to Portugal from Ontario during February instead. Flights to Portugal in February, while not as cheap as those in December, still average around $511.

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 15m

Direct flights

None
The fastest flight from Ontario to Portugal takes 16h 15m
There are no direct flights from Ontario to Portugal. There are no popular flight routes from Ontario to Portugal.
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Frequently asked questions about flying from Ontario to Portugal

  • 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
9,926 reviews
Search United Airlines flights
DeltaPriceFrom $582Free CancellationRating
7.8
8,452 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.

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Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo
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