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?

Two cabin classes are available on flights from Ontario to Porto: • Economy Class • Premium Economy Class

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

Yes. Flexible dates can save you up to 66% on flights from Ontario to Porto. 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, Avenida dos Aliados and Mercado do Bolhão. 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.

Have flight prices from Ontario to Porto changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $728 to $6,125. That means the highest observed fare was about 8x higher than the lowest one.

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 $409, which is 10% below the typical average for this route.

What is the time difference between Ontario and Porto?

Porto is 7 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 averaging $24 for economy cars. Top options include: • GREEN MOTION • Drive on Holiday • Klass Wagen • Goldcar Rental SP • Sixt

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

United Airlines ($733) and British Airways ($740) are the cheapest airlines to fly round-trip from Ontario to Porto according to KAYAK data over the last 5 days.

$340 CHEAP FLIGHTS from Ontario to Porto (ONT - OPO)

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Cheapest round-trip

$728

Typical prices: $1,157-$1,998

Air France, KLM

Fri 2/23Sat 3/24

ONT - OPO • 2 stops

Cheapest one-way

$340

Typical prices: $346-$549

United Airlines

Thu 3/15

ONT - OPO • 2 stops

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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

Wed, Feb 24 - Wed, Mar 24

7:00 am - 10:35 amONT Ontario-OPO Porto

19h 35m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 10:43 pmOPO Porto-ONT Ontario

24h 43m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$728Multiple Airlines

Tue, Feb 23 - Thu, Mar 25

7:00 am - 10:35 amONT Ontario-OPO Porto

19h 35m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 5:17 pmOPO Porto-ONT Ontario

19h 17m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$728Multiple Airlines

Wed, Feb 24 - Thu, Mar 25

7:00 am - 10:35 amONT Ontario-OPO Porto

19h 35m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 5:17 pmOPO Porto-ONT Ontario

19h 17m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$728Multiple Airlines

Tue, Feb 23 - Wed, Mar 24

7:00 am - 10:35 amONT Ontario-OPO Porto

19h 35m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:00 am - 5:17 pmOPO Porto-ONT Ontario

19h 17m2 stops Amsterdam Schiphol Seattle/Tacoma Intl

$728Multiple Airlines

Wed, Feb 24 - Wed, Mar 24

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

19h 30m2 stops San Francisco Newark

6:00 am - 8:19 pmOPO Porto-ONT Ontario

21h 19m3 stops Frankfurt am Main Denver Intl San Francisco

$733United Airlines

Wed, Feb 24 - Tue, Mar 23

7:00 am - 10:35 amONT Ontario-OPO Porto

19h 35m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:55 am - 10:14 pmOPO Porto-ONT Ontario

23h 19m2 stops Paris Charles de Gaulle Atlanta Hartsfield-Jackson

$736Multiple Airlines

Tue, Feb 23 - Tue, Mar 23

7:00 am - 10:35 amONT Ontario-OPO Porto

19h 35m2 stops Atlanta Hartsfield-Jackson Paris Charles de Gaulle

5:55 am - 10:43 pmOPO Porto-ONT Ontario

23h 48m2 stops Paris Charles de Gaulle Seattle/Tacoma Intl

$736Multiple Airlines

Sun, Apr 18 - Fri, Apr 30

6:00 am - 9:45 amONT Ontario-OPO Porto

19h 45m2 stops San Francisco Newark

6:00 am - 8:20 pmOPO Porto-ONT Ontario

22h 20m2 stops Frankfurt am Main Denver Intl

$737United Airlines

Wed, Feb 24 - Wed, Mar 24

5:00 am - 9:30 amONT Ontario-OPO Porto

20h 30m2 stops Denver Intl Newark

6:00 am - 8:19 pmOPO Porto-ONT Ontario

21h 19m2 stops Frankfurt am Main San Francisco

$737United Airlines

Mon, Mar 1 - Wed, Mar 10

2:29 pm - 5:35 pmONT Ontario-OPO Porto

19h 06m2 stops Dallas/Fort Worth London Heathrow

8:40 pm - 9:42 amOPO Porto-ONT Ontario

21h 02m2 stops Madrid Barajas Dallas/Fort Worth

$740British Airways

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 with more confidence.

Which airline is the cheapest to fly from Ontario to Porto?: United Airlines ($733) and British Airways ($740) are the cheapest airlines to fly round-trip from Ontario to Porto according to KAYAK data over the last 5 days.

Find deals

Cheapest flight	$340

One-way 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.

What cabin classes can I book on flights from Ontario to Porto?
Two cabin classes are available on flights from Ontario to Porto:

• Economy Class
• Premium Economy Class
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.
Have flight prices from Ontario to Porto changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $728 to $6,125. That means the highest observed fare was about 8x higher than the lowest one.
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 $409, which is 10% below the typical average for this route.
What car rental options are available at Porto Airport (OPO)?
Porto Airport (OPO) hosts 5 major car rental companies, with daily rates averaging $24 for economy cars. Top options include:

• GREEN MOTION
• Drive on Holiday
• Klass Wagen
• Goldcar Rental SP
• Sixt
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).
Can I save money by using flexible dates for flights from Ontario to Porto?
Yes. Flexible dates can save you up to 66% on flights from Ontario to Porto. 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 is the time difference between Ontario and Porto?
Porto is 7 hours ahead of Ontario (Western European Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.
What popular places can I visit in Porto?
Some of the most popular sights in Porto are Ribeira Square, Avenida dos Aliados and Mercado do Bolhão. These are among the most viewed places in Porto on KAYAK.

If your dates are flexible, aim for a Monday departure and avoid flying on Saturday. On this route, Monday flights average $682, about $1,316 less than Saturday fares (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.

• Ap Aeroporto Porto

More options for your flight from Ontario to Porto

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ONT - OPO

$340 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

Which airline is the cheapest 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