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Cheap flights from Ontario International to Barcelona

Compare Ontario International to Barcelona flight deals

Find the cheapest month or even day of the year to fly to Barcelona

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Flight deals from Ontario International to Barcelona

Looking for a cheap last-minute deal or the best return flight from Ontario International to Barcelona? Find the lowest prices on one-way and return tickets right here.
Barcelona.P35,955 per passenger.Departing Mon, 22 Sep, returning Tue, 7 Oct.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Mon, 22 Sep, arriving in Barcelona.Inbound indirect flight with Iberia, departs from Barcelona on Tue, 7 Oct, arriving in Ontario International.Price includes taxes and charges.From P35,955, select.
Barcelona.P37,455 per passenger.Departing Wed, 13 Aug, returning Wed, 20 Aug.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Wed, 13 Aug, arriving in Barcelona.Inbound indirect flight with Iberia, departs from Barcelona on Wed, 20 Aug, arriving in Ontario International.Price includes taxes and charges.From P37,455, select.
Barcelona.P38,525 per passenger.Departing Sun, 5 Oct, returning Tue, 21 Oct.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Ontario International on Sun, 5 Oct, arriving in Barcelona.Inbound indirect flight with British Airways, departs from Barcelona on Tue, 21 Oct, arriving in Ontario International.Price includes taxes and charges.From P38,525, select.
Barcelona.P38,525 per passenger.Departing Tue, 3 Feb, returning Tue, 10 Feb.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Ontario International on Tue, 3 Feb, arriving in Barcelona.Inbound indirect flight with British Airways, departs from Barcelona on Tue, 10 Feb, arriving in Ontario International.Price includes taxes and charges.From P38,525, select.
Barcelona.P38,572 per passenger.Departing Tue, 27 Jan, returning Tue, 10 Feb.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Ontario International on Tue, 27 Jan, arriving in Barcelona.Inbound indirect flight with British Airways, departs from Barcelona on Tue, 10 Feb, arriving in Ontario International.Price includes taxes and charges.From P38,572, select.
Barcelona.P38,672 per passenger.Departing Tue, 19 Aug, returning Fri, 12 Sep.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Ontario International on Tue, 19 Aug, arriving in Barcelona.Inbound indirect flight with British Airways, departs from Barcelona on Fri, 12 Sep, arriving in Ontario International.Price includes taxes and charges.From P38,672, select.
Barcelona.P38,934 per passenger.Departing Wed, 14 Jan, returning Thu, 22 Jan.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Ontario International on Wed, 14 Jan, arriving in Barcelona.Inbound indirect flight with British Airways, departs from Barcelona on Thu, 22 Jan, arriving in Ontario International.Price includes taxes and charges.From P38,934, select.
Barcelona.P38,934 per passenger.Departing Tue, 10 Mar, returning Tue, 17 Mar.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Ontario International on Tue, 10 Mar, arriving in Barcelona.Inbound indirect flight with Iberia, departs from Barcelona on Tue, 17 Mar, arriving in Ontario International.Price includes taxes and charges.From P38,934, select.

Find the cheapest month to fly from Ontario International to Barcelona

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Barcelona flights are currently cheapest in August.
Jul
Find prices
Aug
from P37,455
Sep
from P40,268
Oct
from P38,525
Nov
from P41,786
Dec
Find prices
Jan
from P38,934
Feb
from P38,525
Mar
from P38,934
Apr
Find prices
May
from P54,398
Jun
from P84,423

Ontario International to Barcelona: Alternative routes

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

Ontario to Barcelona: Flight information

The things to know before you go.
Cheapest flight foundP35,955
Cheapest month to flySeptember

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

The best price we found for a return flight from Ontario International to Barcelona is P35,955. 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 Ontario International to Barcelona. But we found flights with one or more stops from P35,955.
As of July 2025, there are no flights flying from Ontario International to Barcelona.
The cheapest month to fly from Ontario International to Barcelona is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Barcelona Airport on Monday, 22 September 2025.
No airlines currently offer direct flights between Ontario International Airport and Barcelona 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 Barcelona 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 Barcelona is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Iberia offers the cheapest flight tickets to Barcelona.

Flying from Ontario International Airport (ONT) to Barcelona-El Prat Airport (BCN): what you need to know

  • The timezone in Barcelona is UTC+1, which is eight hours ahead of Ontario.

  • Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for stress-free travel. Show up at the airport on time to board your ONT to BCN flight.

  • During popular months like August, it's a good idea to get to the airport earlier than normal. Arrive two hours before domestic departures and four hours ahead of an international flight when you travel during peak periods in general.

  • If you'd like to include a stop along the way, just deselect 'Direct flights only' when searching for your ticket from Ontario International Airport to Barcelona-El Prat Airport. Here are the most popular stopovers between ONT and BCN:

    • San Francisco International Airport

    • Hartsfield-Jackson Atlanta International Airport

    • Dallas/Fort Worth International Airport

How to find the cheapest flights from Ontario International Airport (ONT) to Barcelona-El Prat Airport (BCN)

  • Currently, P19,276 is the cheapest price we've seen for a one-way Ontario International Airport to Barcelona-El Prat Airport flight. The best price for a return ticket is P35,955. Keep in mind that fares may change due to demand at the time of booking.

  • To find cheap tickets from ONT to BCN, book ahead. Airlines usually offer the most competitive fares when flights are first made available.

  • The 'Whole month' search function shows you the cheapest flights from Ontario International Airport to Barcelona-El Prat Airport across the month. It's a great way to find a bargain if your travel dates aren't set in stone.

  • Never miss a deal on cheap flights from ONT to BCN by setting up a Price Alert. We'll send you an email or push notification on the app when a special offer becomes available.

  • Lock in the ideal flight for you by using the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Ontario International Airport to Barcelona-El Prat Airport, use the 'Sort by' function. You can also filter results by departure and arrival times, airline, and journey duration.

Handy information about Ontario International Airport (ONT)

  • ONT is located at 2900 E. Airport Drive.

  • 83.6% of flights leaving Ontario International Airport touch down at their destination according to schedule. Given its strong on-time performance, delays are unlikely when flying out of ONT.

  • To get to Ontario International Airport from central Ontario, it'll take about 10 minutes if you're going by car. Of course, this depends on traffic. It's approximately 6 kilometres from the airport to the city centre.

  • The journey when using public transport takes roughly 1 hour 30 minutes.

  • Taking an early flight from Ontario International Airport to Barcelona-El Prat Airport? Avoid rushing to the terminal (and sneak in some extra snooze time) by choosing one of these stays close to ONT:

Arriving at Barcelona-El Prat Airport (BCN)

Getting from Barcelona-El Prat Airport (BCN) to central Barcelona

  • Barcelona-El Prat Airport to the centre of Barcelona has a drive time of about 25 minutes. It's approximately 18 kilometres away.

  • If you're using public transport, expect a journey time of roughly 35 minutes.

When to fly to Barcelona-El Prat Airport (BCN)

  • July is the most popular month for flights from Ontario International Airport to Barcelona-El Prat Airport. For smaller crowds, travel to Barcelona in January.

  • The warmest month in Barcelona is August, with the temperature ranging between 20ºC (68ºF) and 31ºC (88ºF). Lock in your flights from Ontario International Airport to Barcelona-El Prat Airport in this month if this is the type of weather you like.

  • If you want cooler conditions, look for a cheap ticket from ONT to BCN in January. Temperatures average between 5ºC (41ºF) and 14ºC (57ºF) then.

Explore more of Spain

  • Barcelona has plenty going for it, but there are so many other parts of Spain you should also see. Around 257 kilometres west of Barcelona, a visit to Zaragoza will keep your itinerary packed. Check out popular attractions like Puente de Piedra, Museo Pablo Gargallo and El Tubo.

  • If you want to check out another major stop in Spain, consider Logroño, about 402 kilometres west of Barcelona. Concatedral de Santa Maria de la Redonda, Museo de la Rioja and Iglesia de Santiago el Real are among the biggest draws.

More travel options

Plan the rest of your trip from Ontario to Barcelona

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.