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882 € Cheap Flights from Lisbon to Ontario International

Compare Lisbon to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Lisbon to Ontario International

Looking for a cheap last-minute deal or the best return flight from Lisbon Airport to Ontario International Airport? If you want to travel next month, return fares start from 945 €. Find the lowest prices on one-way and return tickets right here.
Ontario.882 € per passenger.Departing Sat, 15 May, returning Sun, 23 May.Return flight with Delta.Outbound indirect flight with Delta, departs from Lisbon on Sat, 15 May, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Sun, 23 May, arriving in Lisbon.Price includes taxes and charges.From 882 €, select.
Ontario.905 € per passenger.Departing Tue, 3 Nov, returning Sat, 5 Dec.Return flight with Iberia and British Airways.Outbound indirect flight with Iberia, departs from Lisbon on Tue, 3 Nov, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Sat, 5 Dec, arriving in Lisbon.Price includes taxes and charges.From 905 €, select.
Ontario.945 € per passenger.Departing Thu, 13 Aug, returning Fri, 21 Aug.Return flight with TAP Air Portugal and Alaska Airlines.Outbound indirect flight with TAP Air Portugal, departs from Lisbon on Thu, 13 Aug, arriving in Ontario International.Inbound indirect flight with Alaska Airlines, departs from Ontario International on Fri, 21 Aug, arriving in Lisbon.Price includes taxes and charges.From 945 €, select.
Ontario.958 € per passenger.Departing Thu, 24 Dec, returning Mon, 11 Jan.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Lisbon on Thu, 24 Dec, arriving in Ontario International.Inbound indirect flight with Air France, departs from Ontario International on Mon, 11 Jan, arriving in Lisbon.Price includes taxes and charges.From 958 €, select.
Ontario.991 € per passenger.Departing Thu, 23 Jul, returning Mon, 27 Jul.Return flight with Delta.Outbound indirect flight with Delta, departs from Lisbon on Thu, 23 Jul, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Mon, 27 Jul, arriving in Lisbon.Price includes taxes and charges.From 991 €, select.
Ontario.1.687 € per passenger.Departing Mon, 28 Sep, returning Tue, 6 Oct.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Lisbon on Mon, 28 Sep, arriving in Ontario International.Inbound indirect flight with Turkish Airlines, departs from Ontario International on Tue, 6 Oct, arriving in Lisbon.Price includes taxes and charges.From 1.687 €, select.
Ontario.1.687 € per passenger.Departing Fri, 28 Aug, returning Sat, 12 Sep.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Lisbon on Fri, 28 Aug, arriving in Ontario International.Inbound indirect flight with Turkish Airlines, departs from Ontario International on Sat, 12 Sep, arriving in Lisbon.Price includes taxes and charges.From 1.687 €, select.
Ontario.1.687 € per passenger.Departing Tue, 8 Sep, returning Sun, 13 Sep.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Lisbon on Tue, 8 Sep, arriving in Ontario International.Inbound indirect flight with Turkish Airlines, departs from Ontario International on Sun, 13 Sep, arriving in Lisbon.Price includes taxes and charges.From 1.687 €, select.
Ontario.1.726 € per passenger.Departing Fri, 2 Oct, returning Sat, 10 Oct.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Lisbon on Fri, 2 Oct, arriving in Ontario International.Inbound indirect flight with Turkish Airlines, departs from Ontario International on Sat, 10 Oct, arriving in Lisbon.Price includes taxes and charges.From 1.726 €, select.
Ontario.1.743 € per passenger.Departing Tue, 21 Jul, returning Mon, 3 Aug.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Lisbon on Tue, 21 Jul, arriving in Ontario International.Inbound indirect flight with Turkish Airlines, departs from Ontario International on Mon, 3 Aug, arriving in Lisbon.Price includes taxes and charges.From 1.743 €, select.
Ontario.1.757 € per passenger.Departing Thu, 30 Jul, returning Sat, 5 Sep.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Lisbon on Thu, 30 Jul, arriving in Ontario International.Inbound indirect flight with Turkish Airlines, departs from Ontario International on Sat, 5 Sep, arriving in Lisbon.Price includes taxes and charges.From 1.757 €, select.
Ontario.2.297 € per passenger.Departing Fri, 28 May, returning Tue, 1 Jun.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Lisbon on Fri, 28 May, arriving in Ontario International.Inbound indirect flight with Turkish Airlines, departs from Ontario International on Tue, 1 Jun, arriving in Lisbon.Price includes taxes and charges.From 2.297 €, select.
Ontario.2.462 € per passenger.Departing Sat, 6 Mar, returning Sat, 13 Mar.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Lisbon on Sat, 6 Mar, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Sat, 13 Mar, arriving in Lisbon.Price includes taxes and charges.From 2.462 €, select.

Find the cheapest month to fly from Lisbon to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Lisbon to Ontario International flights are currently cheapest in May.
Jul
from 991 €
Aug
from 945 €
Sep
from 1.687 €
Oct
from 1.726 €
Nov
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Dec
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Jan
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Feb
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Mar
from 2.462 €
Apr
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May
from 882 €
Jun
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Lisbon to Ontario International: Alternative routes

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

Ontario International

4km from central Ontario
Closest
from 882 €
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San Bernardino Norton AFB

39km from central Ontario
Search flights

Santa Ana John Wayne

48km from central Ontario
from 1.029 €
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Long Beach Municipal

54km from central Ontario
from 1.013 €
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Hawthorne

65km from central Ontario
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Burbank

67km from central Ontario
from 859 €
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Los Angeles International

71km from central Ontario
Cheapest
from 437 €
Search flights

Lisbon to Ontario: Flight information

The things to know before you go.
Cheapest flight found882 €
Cheapest month to flyMay

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

The best price we found for a return flight from Lisbon to Ontario International is 882 €. 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.
Currently, there are no airlines that fly direct from Lisbon to Ontario International. But we found flights with one or more stops from 882 €.
As of July 2026, there are no flights flying from Lisbon to Ontario International.
The cheapest month to fly from Lisbon to Ontario International is usually May.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Lisbon Airport to Ontario International Airport on Saturday, 15 May 2027.
No airlines currently offer direct flights between Lisbon Airport and Ontario International Airport. Most routes have one or more stops.
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 Ontario International 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.

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

Currently, Delta offers the cheapest flight tickets to Ontario International.

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

  • The timezone in Ontario is UTC-8, which is eight hours behind Lisbon.

  • To ensure you get on your LIS to ONT flight, leave enough time to check in and find your gate. Turning up two hours ahead of international departures and an hour before domestic flights is the standard rule.

  • Travelling during a peak month like August? Major public holidays and other popular seasons can lead to longer queues and delays at airport checkpoints. Play it safe and get there up to four hours ahead of an international flight and two hours before a domestic departure.

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

  • At the moment, 485 € is the cheapest price we've found for a one-way Lisbon Airport to Ontario International Airport flight. The best price for a return ticket is 882 €. Keep in mind that fares could change due to demand when booking.

  • To get your hands on cheap tickets from LIS to ONT, book in advance. Airlines usually offer lower prices when flights are first made available.

  • If you're willing to be flexible with your travel dates, try using the 'Whole month' search function. It'll find the lowest price in each month when looking for a flight from Lisbon Airport to Ontario International Airport.

  • Stay on top of deals for cheap flights from LIS to ONT by creating a Price Alert. You'll receive an email or push notification on the app when a new discounted fare appears.

  • Discover the ideal flight for you by using the filters. To see the 'Fastest,' 'Best' or 'Cheapest' flights from Lisbon Airport to Ontario International Airport, use the 'Sort by' tool. You can also filter results by departure and arrival times, airline, and journey duration.

Handy information about Lisbon Airport (LIS)

  • Of the flights that depart from Lisbon Airport, 56% arrive on time at their destination.

  • To reach Lisbon Airport from central Lisbon, it'll take around 20 minutes if you're planning to drive. This depends on traffic though. It's approximately 8 kilometres from the airport to the city centre.

  • Planning to take public transport? You can expect a journey time of around 25 minutes.

  • Booked an early flight from Lisbon Airport to Ontario International Airport? Avoid the last-minute rush to the terminal (and catch some extra z's) by picking one of these stays close to LIS:

Arriving at Ontario International Airport (ONT)

When to fly to Ontario International Airport (ONT)

  • It's time to plan your dates for your flight from Lisbon Airport to Ontario International Airport. July is the busiest month to head to Ontario. If you want a quieter vibe, go in March.

  • Before locking in your flight from Lisbon Airport to Ontario International Airport, consider the kind of weather you enjoy. August is the warmest month in Ontario, with temperatures ranging from 16ºC (61ºF) to 36ºC (97ºF).

  • If you like travelling in cooler conditions, search for a cheap ticket from LIS to ONT in February. Average temperatures are between 4ºC (39ºF) and 24ºC (75ºF) then.

Explore more of the United States

  • You've seen Ontario, now it's time to explore other parts of the United States. Journey about 56 kilometres west to Los Angeles to check off its top attractions. From Hollywood Sign to Universal Studios Hollywood and Hollywood Bowl, you'll have a full itinerary ahead.

  • If you're interested in discovering another corner of the United States, head for San Diego, about 153 kilometres south of Ontario. San Diego Zoo, San Diego Balboa Park and USS Midway Museum are highlights.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.