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Cheap flights from Ontario to Porto from $393

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 Porto departing on 10/10. 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

Find the cheapest flights from Ontario to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:02 am - 9:30 am
ONT
-
OPO
19h 28m
2 stops
United Airlines Logo
6:00 am - 11:06 pm
OPO
-
ONT
25h 06m
2 stops
$746United Airlines
Sun, Dec 6 - Thu, Dec 10
United Airlines Logo
6:46 am - 9:30 am
ONT
-
OPO
18h 44m
2 stops
United Airlines Logo
6:00 am - 11:06 pm
OPO
-
ONT
25h 06m
2 stops
$777United Airlines
Tue, Nov 24 - Tue, Dec 1
United Airlines Logo
5:00 am - 9:30 am
ONT
-
OPO
20h 30m
2 stops
United Airlines Logo
6:00 am - 12:33 pm
OPO
-
ONT
38h 33m
2 stops
$783United Airlines
Sun, Dec 13 - Wed, Jan 6
United Airlines Logo
6:46 am - 9:30 am
ONT
-
OPO
18h 44m
2 stops
United Airlines Logo
6:00 am - 8:06 pm
OPO
-
ONT
22h 06m
2 stops
$876United Airlines
Fri, Nov 13 - Sat, Nov 21
United Airlines Logo
5:00 am - 7:00 am
ONT
-
OPO
18h 00m
2 stops
United Airlines Logo
6:00 am - 8:58 pm
OPO
-
ONT
22h 58m
2 stops
$893United Airlines
Tue, Sep 15 - Thu, Sep 24
United Airlines Logo
7:00 am - 7:00 am
ONT
-
OPO
16h 00m
2 stops
United Airlines Logo
12:15 pm - 7:57 pm
OPO
-
ONT
39h 42m
2 stops
$911United Airlines
Wed, Aug 26 - Tue, Sep 15
United Airlines Logo
7:13 pm - 7:00 am
ONT
-
OPO
27h 47m
3 stops
United Airlines Logo
6:00 am - 10:59 pm
OPO
-
ONT
24h 59m
2 stops
$923United Airlines
Sun, Aug 30 - Fri, Sep 18
United Airlines Logo
1:18 pm - 6:55 am
ONT
-
OPO
33h 37m
2 stops
United Airlines Logo
11:20 am - 8:01 pm
OPO
-
ONT
40h 41m
2 stops
$924United Airlines
Sat, Aug 29 - Wed, Sep 16
Delta Logo
10:00 pm - 10:30 am
ONT
-
OPO
28h 30m
2 stops
Delta Logo
11:25 am - 11:37 pm
OPO
-
ONT
44h 12m
2 stops
$925Delta
Sun, Aug 30 - Mon, Sep 14
Delta Logo
1:06 pm - 3:30 pm
ONT
-
OPO
42h 24m
2 stops
Delta Logo
11:25 am - 11:37 pm
OPO
-
ONT
44h 12m
2 stops
$929Delta
Wed, Aug 26 - Mon, Sep 14

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Turkish Airlines flights from Ontario to Porto

Our best Turkish Airlines deals on Ontario to Porto flight tickets
Turkish Airlines
Sep 8
ONT11:50 pmOntario
55h 55m
2 stops
OPO3:45 pmPorto
Sep 22
OPO10:40 amPorto
41h 33m
2 stops
ONT8:13 pmOntario
$1,151
Turkish Airlines
Sep 8
ONT11:50 pmOntario
49h 50m
2 stops
OPO9:40 amPorto
Sep 29
OPO10:40 amPorto
65h 33m
2 stops
ONT8:13 pmOntario
$1,192
Turkish Airlines
Sep 1
ONT11:50 pmOntario
55h 55m
2 stops
OPO3:45 pmPorto
Sep 13
OPO10:45 amPorto
65h 28m
2 stops
ONT8:13 pmOntario
$1,206

United Airlines flights from Ontario to Porto

Our best United Airlines deals on Ontario to Porto flight tickets
United Airlines
Dec 6
ONT6:02 amOntario
19h 28m
2 stops
OPO9:30 amPorto
Dec 10
OPO6:00 amPorto
25h 06m
2 stops
ONT11:06 pmOntario
$746
United Airlines
Nov 24
ONT6:46 amOntario
18h 44m
2 stops
OPO9:30 amPorto
Dec 1
OPO6:00 amPorto
25h 06m
2 stops
ONT11:06 pmOntario
$777
United Airlines
Dec 13
ONT5:00 amOntario
20h 30m
2 stops
OPO9:30 amPorto
Jan 6
OPO6:00 amPorto
38h 33m
2 stops
ONT12:33 pmOntario
$783

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Porto 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 June 21, 2026.
Use the filters below to find and compare flights from Ontario to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sun 12/6

6:02 am-9:30 am

2 stops19h 28m

Porto

Thu 12/10

6:00 am-11:06 pm

2 stops25h 06m

$746

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Tue 11/24

6:46 am-9:30 am

2 stops18h 44m

Porto

Tue 12/1

6:00 am-11:06 pm

2 stops25h 06m

$777

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sun 12/13

5:00 am-9:30 am

2 stops20h 30m

Porto

Wed 1/6

6:00 am-12:33 pm

2 stops38h 33m

$783
Quickest round-trip

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Fri 11/13

6:46 am-9:30 am

2 stops18h 44m

Porto

Sat 11/21

6:00 am-8:06 pm

2 stops22h 06m

$876

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Tue 9/15

5:00 am-7:00 am

2 stops18h 00m

Porto

Thu 9/24

6:00 am-8:58 pm

2 stops22h 58m

$893

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 8/26

7:00 am-7:00 am

2 stops16h 00m

Porto

Tue 9/15

12:15 pm-7:57 pm

2 stops39h 42m

$911

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sun 8/30

7:13 pm-7:00 am

3 stops27h 47m

Porto

Fri 9/18

6:00 am-10:59 pm

2 stops24h 59m

$923

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sat 8/29

1:18 pm-6:55 am

2 stops33h 37m

Porto

Wed 9/16

11:20 am-8:01 pm

2 stops40h 41m

$924

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Sun 8/30

10:00 pm-10:30 am

2 stops28h 30m

Porto

Mon 9/14

11:25 am-11:37 pm

2 stops44h 12m

$925

OntarioPorto

ONT - OPO

ONTOPO

Ontario

Wed 8/26

1:06 pm-3:30 pm

2 stops42h 24m

Porto

Mon 9/14

11:25 am-11:37 pm

2 stops44h 12m

$929

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 Porto from

How to get the cheapest flight ticket from Ontario to Porto

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 Porto?

United Airlines and Lufthansa are the most popular carriers operating from Ontario to Porto

What airlines fly to Porto?

TAP AIR PORTUGAL, United Airlines and Delta are the top three most popular airlines that fly to Porto from Ontario according to our data. TAP AIR PORTUGAL is the first choice among our users, with 32% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 9 different airlines that fly to Porto on a routine basis, so you have a few additional options to choose from.

When to book flights from Ontario to Porto

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Porto according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Porto (ONT to OPO) flight deals and tips

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

Fastest flight time

16h 58m

Direct flights

None
The fastest flight from Ontario to Porto takes 16h 58m
There are no direct flights from Ontario to Porto. There are no popular flight routes from Ontario to Porto.
Search flight deals

Frequently asked questions about flying from Ontario to Porto

  • How far is Ontario to Porto by plane?

    The distance between Ontario and Porto is about 5556.9 mi. By plane, this route typically takes 16h 58m.

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The necessary travel and health documents for your Porto Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Braga
Aveiro
Matosinhos
Lamego
Esposende
Chaves
Pinhao
Guimarães
Espinho
Arcos de Valdevez
Ponte de Lima
Viseu
Curia
Mesao Frio
Mira
Baiao

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Porto from Ontario.

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

Flights from Ontario to Porto with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Ontario to Porto flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are not ready to book a flight from Ontario to Porto now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Porto and let you know when they change.

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