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Cheap flights from Ontario to Porto from $340

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
5:00 am - 9:30 amONT  Ontario-OPO Porto
20h 30m2 stops Denver Intl Newark
United Airlines Logo
6:00 am - 8:19 pmOPO  Porto-ONT Ontario
21h 19m2 stops Frankfurt am Main San Francisco
$737United Airlines
Wed, Feb 24 - Wed, Mar 24
United Airlines Logo
5:00 am - 9:45 amONT  Ontario-OPO Porto
20h 45m2 stops Denver Intl Newark
United Airlines Logo
6:00 am - 12:20 pmOPO  Porto-ONT Ontario
38h 20m2 stops Frankfurt am Main San Francisco
$743United Airlines
Tue, Apr 20 - Fri, Apr 23
United Airlines Logo
5:00 am - 9:45 amONT  Ontario-OPO Porto
20h 45m2 stops Denver Intl Newark
United Airlines Logo
12:35 pm - 5:47 pmOPO  Porto-ONT Ontario
37h 12m3 stops Newark Houston George Bush Intcntl San Francisco
$747United Airlines
Tue, Apr 20 - Fri, Apr 23
British Airways Logo
2:42 pm - 5:50 pmONT  Ontario-OPO Porto
20h 08m2 stops Dallas/Fort Worth London Heathrow
British Airways Logo
8:40 pm - 9:42 amOPO  Porto-ONT Ontario
20h 02m2 stops Madrid Barajas Dallas/Fort Worth
$756British Airways
Tue, Mar 16 - Wed, Mar 24
United Airlines Logo
6:00 am - 9:45 amONT  Ontario-OPO Porto
19h 45m2 stops San Francisco Newark
United Airlines Logo
12:35 pm - 12:33 pmOPO  Porto-ONT Ontario
31h 58m2 stops Newark Denver Intl
$758United Airlines
Tue, Apr 20 - Fri, Apr 23
United Airlines Logo
5:00 am - 9:45 amONT  Ontario-OPO Porto
44h 45m2 stops Denver Intl Newark
United Airlines Logo
12:35 pm - 10:31 pmOPO  Porto-ONT Ontario
41h 56m2 stops Newark Chicago O'Hare Intl
$763United Airlines
Tue, Apr 20 - Fri, Apr 23
United Airlines Logo
7:00 am - 11:40 amONT  Ontario-OPO Porto
20h 40m2 stops Chicago O'Hare Intl Frankfurt am Main
United Airlines Logo
6:00 am - 8:25 pmOPO  Porto-ONT Ontario
22h 25m2 stops Frankfurt am Main San Francisco
$801United Airlines
Fri, Jan 29 - Thu, Feb 4
Multiple Airlines Logo
6:00 am - 6:50 pmONT  Ontario-OPO Porto
28h 50m3 stops Denver Intl Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
9:55 pm - 11:23 pmOPO  Porto-ONT Ontario
33h 28m3 stops Barcelona-El Prat Lisbon Humberto Delgado San Francisco
$837Multiple Airlines
Thu, Dec 3 - Thu, Dec 10
Multiple Airlines Logo
6:00 am - 5:25 pmONT  Ontario-OPO Porto
27h 25m3 stops Denver Intl Reykjavik Keflavik Intl Dublin
Multiple Airlines Logo
9:55 pm - 11:23 pmOPO  Porto-ONT Ontario
33h 28m3 stops Barcelona-El Prat Lisbon Humberto Delgado San Francisco
$841Multiple Airlines
Wed, Dec 2 - Thu, Dec 10
KLM Logo
1:09 pm - 3:25 pmONT  Ontario-OPO Porto
18h 16m2 stops Atlanta Hartsfield-Jackson Amsterdam Schiphol
KLM Logo
5:00 am - 4:27 pmOPO  Porto-ONT Ontario
19h 27m2 stops Amsterdam Schiphol Salt Lake City
$853KLM
Tue, Jan 26 - Mon, Feb 8

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United Airlines flights from Ontario to Porto

Our best United Airlines deals on Ontario to Porto flight tickets
United Airlines
Feb 24
ONT5:00 amOntario
20h 30m
2 stops
OPO9:30 amPorto
Mar 24
OPO6:00 amPorto
21h 19m
2 stops
ONT8:19 pmOntario
$737
United Airlines
Apr 20
ONT5:00 amOntario
20h 45m
2 stops
OPO9:45 amPorto
Apr 23
OPO6:00 amPorto
38h 20m
2 stops
ONT12:20 pmOntario
$743
United Airlines
Apr 20
ONT5:00 amOntario
20h 45m
2 stops
OPO9:45 amPorto
Apr 23
OPO12:35 pmPorto
37h 12m
3 stops
ONT5:47 pmOntario
$747

KLM flights from Ontario to Porto

Our best KLM deals on Ontario to Porto flight tickets
KLM
Jan 26
ONT1:09 pmOntario
18h 16m
2 stops
OPO3:25 pmPorto
Feb 8
OPO5:00 amPorto
19h 27m
2 stops
ONT4:27 pmOntario
$853
KLM
Jan 28
ONT1:09 pmOntario
18h 16m
2 stops
OPO3:25 pmPorto
Feb 8
OPO5:00 amPorto
19h 27m
2 stops
ONT4:27 pmOntario
$903

momondo Fare Finder

 
Use the filters below to find and compare flights from Ontario to Porto that are best for you.

Fly from

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Route

Depart

Return

Price

Cheapest round-trip

OntarioPorto

ONT Ontario - OPO Porto

ONTOPO

Ontario

Wed 2/24

5:00 am-9:30 am

2 stops20h 30m

Porto

Wed 3/24

6:00 am-8:19 pm

2 stops21h 19m

$737

OntarioPorto

ONT Ontario - OPO Porto

ONTOPO

Ontario

Tue 4/20

5:00 am-9:45 am

2 stops20h 45m

Porto

Fri 4/23

6:00 am-12:20 pm

2 stops38h 20m

$743

OntarioPorto

ONT Ontario - OPO Porto

ONTOPO

Ontario

Tue 4/20

5:00 am-9:45 am

2 stops20h 45m

Porto

Fri 4/23

12:35 pm-5:47 pm

3 stops37h 12m

$747

OntarioPorto

ONT Ontario - OPO Porto

ONTOPO

Ontario

Tue 3/16

2:42 pm-5:50 pm

2 stops20h 08m

Porto

Wed 3/24

8:40 pm-9:42 am

2 stops20h 02m

$756

OntarioPorto

ONT Ontario - OPO Porto

ONTOPO

Ontario

Tue 4/20

6:00 am-9:45 am

2 stops19h 45m

Porto

Fri 4/23

12:35 pm-12:33 pm

2 stops31h 58m

$758

OntarioPorto

ONT Ontario - OPO Porto

ONTOPO

Ontario

Tue 4/20

5:00 am-9:45 am

2 stops44h 45m

Porto

Fri 4/23

12:35 pm-10:31 pm

2 stops41h 56m

$763

OntarioPorto

ONT Ontario - OPO Porto

ONTOPO

Ontario

Fri 1/29

7:00 am-11:40 am

2 stops20h 40m

Porto

Thu 2/4

6:00 am-8:25 pm

2 stops22h 25m

$801

OntarioPorto

ONT Ontario - OPO Porto

ONTOPO

Ontario

Thu 12/3

6:00 am-6:50 pm

3 stops28h 50m

Porto

Thu 12/10

9:55 pm-11:23 pm

3 stops33h 28m

$837

OntarioPorto

ONT Ontario - OPO Porto

ONTOPO

Ontario

Wed 12/2

6:00 am-5:25 pm

3 stops27h 25m

Porto

Thu 12/10

9:55 pm-11:23 pm

3 stops33h 28m

$841
Quickest round-trip

OntarioPorto

ONT Ontario - OPO Porto

ONTOPO

Ontario

Tue 1/26

1:09 pm-3:25 pm

2 stops18h 16m

Porto

Mon 2/8

5:00 am-4:27 pm

2 stops19h 27m

$853

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 is the most popular carrier operating from Ontario to Porto

What airlines fly to Porto?

TAP AIR PORTUGAL, Delta and United Airlines 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 40% of people opting to fly with this airline when traveling to Porto. Keep in mind that there are 8 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

Best Price Found

$340

Fastest flight time

18h 11m

Direct flights

None
The best one-way flight to Porto from Ontario in the past 72 hours is $340. The best round-trip flight deal from Ontario to Porto found on momondo in the last 72 hours is $737.
The fastest flight from Ontario to Porto takes 18h 11m
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 18h 11m.

  • 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
Braga
Coimbra
Vila Nova de Gaia
Aveiro
Pinhao
Esposende
Matosinhos
Chaves
Viseu
Espinho
Arcos de Valdevez
Lamego
Guimarães
Caminha
Penafiel
Ponte de Lima
Mira

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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