Which airports can I use when flying from Ontario to Porto?

Flights from Ontario to Porto usually depart from Ontario (ONT) and arrive at Porto (OPO).

What cabin classes can I book on flights from Ontario to Porto?

Only Economy Class is available on flights from Ontario to Porto.

Can I save money by using flexible dates for flights from Ontario to Porto?

Yes. Being flexible with your travel dates can save you up to 66% on the Ontario to Porto route. Monday is the cheapest departure day at $682 round-trip on average, while Saturday is the most expensive at $1,998, a difference of $1,316. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in Porto?

Some of the most popular sights in Porto are Ribeira Square, Mercado do Bolhão and Avenida dos Aliados. These are among the most viewed places in Porto on KAYAK.

Do I need a passport to fly from Ontario to Porto?

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

How are flight prices from Ontario to Porto looking right now?

One-way fares from Ontario to Porto are currently lower than usual. Average one-way flight prices are about $416, which is 34% below the typical average for this route.

What is the time difference between Ontario and Porto?

Porto is 8 hours ahead of Ontario (Western European Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at Porto Airport (OPO)?

Porto Airport (OPO) hosts 5 major car rental companies, with daily rates starting from around $2 for economy cars. Top options include: • Klass Wagen • Drive on Holiday • GREEN MOTION • Goldcar Rental SP • SURPRICE CAR RENTAL

What is the cheapest airline to fly from Ontario to Porto?

Delta ($633) and British Airways ($761) are the cheapest airlines to fly round-trip from Ontario to Porto according to KAYAK data over the last 5 days.

$463 CHEAP FLIGHTS from Ontario to Porto (ONT - OPO)

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

$633

Typical prices: $1,157-$1,363

Delta

Sat 10/27Sat 11/3

ONT - OPO • 2 stops

Cheapest one-way

$345

Typical prices: $549-$622

Iberia

Thu 1/18

ONT - OPO • 2 stops

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Porto!

Flight Deals

Cheap Flights from Ontario to Porto (ONT-OPO)

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Ontario to Porto

Tue, Oct 27 - Tue, Nov 3

12:16 pm - 10:00 pmONT Ontario-OPO Porto

26h 44m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 10:11 pmOPO Porto-ONT Ontario

25h 11m2 stops Amsterdam Schiphol Salt Lake City

$633Delta

Tue, Oct 13 - Tue, Oct 20

9:45 am - 3:25 pmONT Ontario-OPO Porto

21h 40m2 stops Salt Lake City Paris Charles de Gaulle

6:15 am - 10:43 pmOPO Porto-ONT Ontario

24h 28m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

$663Delta

Thu, Oct 29 - Thu, Nov 5

11:56 am - 10:00 pmONT Ontario-OPO Porto

27h 04m2 stops Seattle/Tacoma Intl Paris Charles de Gaulle

5:00 am - 5:12 pmOPO Porto-ONT Ontario

20h 12m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$683Delta

Mon, Sep 28 - Thu, Oct 8

9:52 am - 3:25 pmONT Ontario-OPO Porto

21h 33m2 stops Salt Lake City Paris Charles de Gaulle

5:55 am - 11:55 pmOPO Porto-ONT Ontario

26h 00m2 stops Paris Charles de Gaulle Salt Lake City

$693Delta

Tue, Feb 23 - Wed, Mar 3

2:22 pm - 5:50 pmONT Ontario-OPO Porto

19h 28m2 stops Dallas/Fort Worth London Heathrow

8:40 pm - 9:41 amOPO Porto-ONT Ontario

21h 01m2 stops Madrid Barajas Dallas/Fort Worth

$761British Airways

Tue, Oct 13 - Mon, Oct 19

9:45 am - 3:25 pmONT Ontario-OPO Porto

21h 40m2 stops Salt Lake City Paris Charles de Gaulle

7:55 pm - 5:12 pmOPO Porto-ONT Ontario

29h 17m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$801Multiple Airlines

Fri, Oct 30 - Fri, Nov 6

6:59 am - 9:30 amONT Ontario-OPO Porto

19h 31m2 stops Chicago O'Hare Intl Newark

12:35 pm - 6:47 pmOPO Porto-ONT Ontario

38h 12m2 stops Newark Chicago O'Hare Intl

$821United Airlines

Thu, Oct 29 - Thu, Nov 5

6:59 am - 9:30 amONT Ontario-OPO Porto

19h 31m2 stops Chicago O'Hare Intl Newark

12:35 pm - 12:33 pmOPO Porto-ONT Ontario

55h 58m2 stops Frankfurt am Main Denver Intl

$827United Airlines

Wed, Dec 2 - Sun, Dec 6

6:00 am - 9:30 amONT Ontario-OPO Porto

19h 30m2 stops San Francisco Newark

6:00 am - 8:38 pmOPO Porto-ONT Ontario

22h 38m2 stops Frankfurt am Main San Francisco

$831United Airlines

Wed, Nov 18 - Mon, Nov 30

7:00 am - 3:20 pmONT Ontario-OPO Porto

24h 20m2 stops Chicago O'Hare Intl Frankfurt am Main

12:30 pm - 9:38 amOPO Porto-ONT Ontario

53h 08m2 stops Frankfurt am Main San Francisco

$833United Airlines

Booking Insights

Price, demand and travel trends for Ontario to Porto flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Ontario to Porto with more confidence.

Prices

Airlines

How much is a round-trip flight from Ontario to Porto?

Round-trip flights from Ontario to Porto start at $633. Prices are below average for this route right now, with typical round-trip fares ranging from $1,157 to $1,363. The lowest price found in the past 5 days was $633 on Delta.

Find deals

Cheapest flight	$345

Flight from Ontario to Porto

When to book flights from Ontario to Porto

Are your dates flexible? Find out the best times to travel from Ontario to Porto based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

Which airports can I use when flying from Ontario to Porto?
Flights from Ontario to Porto usually depart from Ontario (ONT) and arrive at Porto (OPO).
What cabin classes can I book on flights from Ontario to Porto?
Only Economy Class is available on flights from Ontario to Porto.
Can I save money by using flexible dates for flights from Ontario to Porto?
Yes. Being flexible with your travel dates can save you up to 66% on the Ontario to Porto route. Monday is the cheapest departure day at $682 round-trip on average, while Saturday is the most expensive at $1,998, a difference of $1,316. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What popular places can I visit in Porto?
Some of the most popular sights in Porto are Ribeira Square, Mercado do Bolhão and Avenida dos Aliados. These are among the most viewed places in Porto on KAYAK.
Do I need a passport to fly from Ontario to Porto?
Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.
How are flight prices from Ontario to Porto looking right now?
One-way fares from Ontario to Porto are currently lower than usual. Average one-way flight prices are about $416, which is 34% below the typical average for this route.
What is the time difference between Ontario and Porto?
Porto is 8 hours ahead of Ontario (Western European Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at Porto Airport (OPO)?
Porto Airport (OPO) hosts 5 major car rental companies, with daily rates starting from around $2 for economy cars. Top options include:
• Klass Wagen
• Drive on Holiday
• GREEN MOTION
• Goldcar Rental SP
• SURPRICE CAR RENTAL

If your dates can be flexible, aim for a Monday departure instead of Saturday. On this route, Monday flights average $682 - about $1,316 less than Saturday (66% savings) based on the last 12 months.
If you're arriving late at night and need somewhere to stay, check out these hotels close to Porto Airport.
- Opo Hotel Porto Aeroporto

More options for your flight from Ontario to Porto

Add a hotel or car rental

Airports

Cabin class

Direct Flights

Origins

Other destinations

Complete your trip to Porto with a hotel stay or car rental

Car rentals in Porto

Hotels in Porto

Vacations in Porto

ONT - OPO

$463 Find Cheap Flights from Ontario to Porto - Compare and Save

Everything you should know

Cheap Flights from Ontario to Porto (ONT-OPO)

Recent round-trip flight deals from Ontario to Porto

Recent one-way flight deals from Ontario to Porto

Recent last minute flight deals from Ontario to Porto

Price, demand and travel trends for Ontario to Porto flights

How much is a round-trip flight from Ontario to Porto?

What is the cheapest airline to fly from Ontario to Porto?

Key details for Ontario to Porto flights

Cheapest flight

When to book flights from Ontario to Porto

Your Ontario to Porto flight questions, answered

Your guide to booking Ontario to Porto flights

More options for your flight from Ontario to Porto

Complete your trip to Porto with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Ontario to Porto

Find direct flights to and from Ontario and Porto

Flights from domestic origins to Porto

Flights to other popular destinations