Cheap flights from Ontario International to Lisbon

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Compare Ontario International to Lisbon flight deals

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Flight deals from Ontario International to Lisbon

Looking for a cheap last-minute deal or the best round-trip flight from Ontario International Airport to Lisbon Airport? If you want to travel next month, round-trip fares start from $818. Find the lowest prices on one-way and round-trip tickets right here.

Lisbon.$818 per passenger.Departing Tue, Sep 22, returning Wed, Sep 30.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Ontario International on Tue, Sep 22, arriving in Lisbon.Inbound indirect flight with Delta, departing from Lisbon on Wed, Sep 30, arriving in Ontario International.Price includes taxes and charges.From $818, select.

Lisbon.$937 per passenger.Departing Mon, May 3, returning Mon, May 17.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Ontario International on Mon, May 3, arriving in Lisbon.Inbound indirect flight with Delta, departing from Lisbon on Mon, May 17, arriving in Ontario International.Price includes taxes and charges.From $937, select.

Lisbon.$943 per passenger.Departing Sun, Sep 27, returning Sun, Oct 4.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Ontario International on Sun, Sep 27, arriving in Lisbon.Inbound indirect flight with Delta, departing from Lisbon on Sun, Oct 4, arriving in Ontario International.Price includes taxes and charges.From $943, select.

Lisbon.$1,825 per passenger.Departing Wed, Dec 30, returning Thu, Dec 31.Round-trip flight with Frontier Airlines and TAP Air Portugal.Outbound indirect flight with Frontier Airlines, departing from Ontario International on Wed, Dec 30, arriving in Lisbon.Inbound indirect flight with TAP Air Portugal, departing from Lisbon on Thu, Dec 31, arriving in Ontario International.Price includes taxes and charges.From $1,825, select.

Lisbon.$1,896 per passenger.Departing Sat, Oct 17, returning Fri, Oct 23.Round-trip flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departing from Ontario International on Sat, Oct 17, arriving in Lisbon.Inbound indirect flight with Turkish Airlines, departing from Lisbon on Fri, Oct 23, arriving in Ontario International.Price includes taxes and charges.From $1,896, select.

Lisbon.$1,930 per passenger.Departing Sun, Aug 30, returning Thu, Sep 10.Round-trip flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departing from Ontario International on Sun, Aug 30, arriving in Lisbon.Inbound indirect flight with Turkish Airlines, departing from Lisbon on Thu, Sep 10, arriving in Ontario International.Price includes taxes and charges.From $1,930, select.

Lisbon.$2,244 per passenger.Departing Sat, May 22, returning Sat, Jun 5.Round-trip flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departing from Ontario International on Sat, May 22, arriving in Lisbon.Inbound indirect flight with Turkish Airlines, departing from Lisbon on Sat, Jun 5, arriving in Ontario International.Price includes taxes and charges.From $2,244, select.

Lisbon.$2,252 per passenger.Departing Wed, Jun 2, returning Wed, Jun 9.Round-trip flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departing from Ontario International on Wed, Jun 2, arriving in Lisbon.Inbound indirect flight with Turkish Airlines, departing from Lisbon on Wed, Jun 9, arriving in Ontario International.Price includes taxes and charges.From $2,252, select.

Lisbon.$2,269 per passenger.Departing Thu, Jun 24, returning Thu, Jul 1.Round-trip flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departing from Ontario International on Thu, Jun 24, arriving in Lisbon.Inbound indirect flight with Turkish Airlines, departing from Lisbon on Thu, Jul 1, arriving in Ontario International.Price includes taxes and charges.From $2,269, select.

Lisbon.$3,341 per passenger.Departing Sun, Aug 23, returning Sat, Aug 29.Round-trip flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departing from Ontario International on Sun, Aug 23, arriving in Lisbon.Inbound indirect flight with Turkish Airlines, departing from Lisbon on Sat, Aug 29, arriving in Ontario International.Price includes taxes and charges.From $3,341, select.

Find the cheapest month to fly from Ontario International to Lisbon

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Lisbon flights are currently cheapest in September.

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Ontario International to Lisbon: Alternative routes

Compare routes from Ontario International to Lisbon below. You may find an airport to fly into that's cheaper, faster, or easier than Lisbon.

Lisbon

8km from central Lisbon

ClosestCheapest

from $818

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Cascais Municipal

19km from central Lisbon

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Ontario to Lisbon: Flight information

The things to know before you go.

Cheapest flight found	$818
Cheapest month to fly	September

Finding cheap flights from Ontario International to Lisbon: Frequently asked questions

How much are round-trip flights from Ontario International to Lisbon?

The best price we found for a round-trip flight from Ontario International to Lisbon is $818. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from Ontario International to Lisbon?

Currently, there are no airlines that fly direct from Ontario International to Lisbon. But we found flights with one or more stops from $818.

How many flights are there a week from Ontario International to Lisbon?

There are no flights flying from Ontario International to Lisbon, as of August 2026.

When is the cheapest time to fly from Ontario International to Lisbon?

The cheapest month to fly from Ontario International to Lisbon is usually September.

Which upcoming date is cheapest to fly from Ontario International Airport to Lisbon Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Lisbon Airport on Tuesday, September 22, 2026.

Can I get a direct flight from Ontario International Airport to Lisbon Airport?

No airlines currently offer direct flights between Ontario International Airport and Lisbon Airport. Most routes have one or more stops.

How can I find the best flight deal to Lisbon?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Lisbon but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Lisbon?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Lisbon is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly with from Ontario International Airport to Lisbon?

Currently, Delta offers the cheapest flight tickets to Lisbon.

Flying from Ontario International Airport (ONT) to Lisbon Airport (LIS): what you need to know

Lisbon's timezone is UTC+0, which makes Lisbon eight hours ahead of Ontario.
Get to the airport on time so you don't miss your ONT to LIS flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid sprinting to your gate.
Be prepared for bigger queues during popular months such as July. Arriving up to four hours in advance for international flights and two hours for a domestic departure will give you ample time for security and boarding.

How to find the cheapest flights from Ontario International Airport (ONT) to Lisbon Airport (LIS)

The cheapest price we've seen for a one-way Ontario International Airport to Lisbon Airport flight is $391. A round-trip plane ticket is currently $818. Depending on the availability and when you book, these fares may change.
To get your hands on cheap tickets from ONT to LIS, book early. Airlines tend to offer their most competitively priced fares when flights are first made available.
If you're willing to be flexible with your trip dates, use the 'Whole month' search tool. It'll show you the cheapest price across each month when looking for your flight from Ontario International Airport to Lisbon Airport.
Finding cheap flights from ONT to LIS is easy with Price Alerts. All you need to do is create one of these automatic alerts and we'll notify you when fares go down.
Secure the ideal flight for you with the help of the filters. To see the 'Cheapest,' 'Fastest' or 'Best' flights from Ontario International Airport to Lisbon Airport, use the 'Sort by' function. You can also filter by arrival and departure times, airline, and number of stops.

Handy information about Ontario International Airport (ONT)

The address for ONT is 2900 E. Airport Drive.
Ontario International Airport gets top marks for its on-time performance. 83% of flights that depart ONT reach their destination without delay.
Ontario International Airport is about 10 kilometers from central Ontario. If you're ride-sharing, catching a cab or driving from the center, it'll take you 15 minutes or so to arrive, depending on the traffic.
Expect a trip time of roughly 45 minutes on public transport.
Get your vacation off to a stress-free start by staying near ONT. Whether you have an early flight from Ontario International Airport to Lisbon Airport or just don't like being rushed, these hotels are ideal:

Arriving at Lisbon Airport (LIS)

The last thing you need is a lengthy journey to your hotel if you're arriving on a late Ontario International Airport to Lisbon Airport flight. Stay at one of these accommodation options near LIS instead:
Explore without limits with a Lisbon Airport rental car. Pick up a set of wheels from Klass Wagen, Goldcar or OK Mobility and venture far and wide through Lisbon and beyond.
To get the lowest price, book your ride from Lisbon Airport about two weeks before traveling.

Getting from Lisbon Airport (LIS) to central Lisbon

Lisbon Airport to the center of Lisbon has a drive time of around 20 minutes. It's approximately 8 kilometers away.
If you're taking public transport, expect a journey time of about 25 minutes.

When to fly to Lisbon Airport (LIS)

It's time to work out your dates for your flight from Ontario International Airport to Lisbon Airport. August is the most popular month to visit Lisbon. If you want a more relaxed vibe, go in March.
Book your flight from Ontario International Airport to Lisbon Airport for August if you want to go to Lisbon during its warmest month. You can expect temperatures of between 16ºC (61ºF) and 29ºC (84ºF).
Search for cheap tickets from ONT to LIS in January if you like cooler conditions. Temperatures are at their lowest then, ranging between 8ºC (46ºF) and 16ºC (61ºF) on average.

Explore more of Portugal

Lisbon has plenty going for it, but there are so many other parts of Portugal waiting to be explored. About 274 kilometers north of Lisbon, a trip to Porto will keep you on the go. Start with leading attractions like Ribeira District, Rio Douro and Livraria Lello.
Amadora is another must-experience destination in Portugal and is around 8 kilometers north-west of Lisbon. No trip is complete without experiencing Roman Villa, Park Fantasia and Palácio dos Condes da Lousã.