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Cheap Flights from Barcelona (BCN) to Ontario (ONT)

Compare Barcelona 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 Barcelona to Ontario International

Looking for a cheap last-minute deal or the best return flight from Barcelona Airport to Ontario International Airport? If you want to travel next month, return fares start from $1,228. Find the lowest prices on one-way and return tickets right here.
Ontario.$1,229 per passenger.Departing Wed, 16 Sep, returning Wed, 23 Sep.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Barcelona on Wed, 16 Sep, arriving in Ontario International.Inbound indirect flight with Iberia, departs from Ontario International on Wed, 23 Sep, arriving in Barcelona.Price includes taxes and charges.From $1,229, select.
Ontario.$1,230 per passenger.Departing Wed, 21 Oct, returning Thu, 5 Nov.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Barcelona on Wed, 21 Oct, arriving in Ontario International.Inbound indirect flight with Iberia, departs from Ontario International on Thu, 5 Nov, arriving in Barcelona.Price includes taxes and charges.From $1,230, select.
Ontario.$1,231 per passenger.Departing Mon, 31 Aug, returning Mon, 14 Sep.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Barcelona on Mon, 31 Aug, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Mon, 14 Sep, arriving in Barcelona.Price includes taxes and charges.From $1,231, select.
Ontario.$1,231 per passenger.Departing Thu, 8 Oct, returning Mon, 12 Oct.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Barcelona on Thu, 8 Oct, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Mon, 12 Oct, arriving in Barcelona.Price includes taxes and charges.From $1,231, select.
Ontario.$1,238 per passenger.Departing Mon, 15 Feb, returning Mon, 22 Feb.Return flight with KLM and Air France.Outbound indirect flight with KLM, departs from Barcelona on Mon, 15 Feb, arriving in Ontario International.Inbound indirect flight with Air France, departs from Ontario International on Mon, 22 Feb, arriving in Barcelona.Price includes taxes and charges.From $1,238, select.
Ontario.$1,239 per passenger.Departing Tue, 9 Mar, returning Mon, 15 Mar.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Barcelona on Tue, 9 Mar, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Mon, 15 Mar, arriving in Barcelona.Price includes taxes and charges.From $1,239, select.
Ontario.$1,255 per passenger.Departing Wed, 26 Aug, returning Sun, 30 Aug.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Barcelona on Wed, 26 Aug, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Sun, 30 Aug, arriving in Barcelona.Price includes taxes and charges.From $1,255, select.
Ontario.$1,264 per passenger.Departing Thu, 12 Nov, returning Thu, 26 Nov.Return flight with United.Outbound indirect flight with United, departs from Barcelona on Thu, 12 Nov, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Thu, 26 Nov, arriving in Barcelona.Price includes taxes and charges.From $1,264, select.
Ontario.$1,276 per passenger.Departing Fri, 18 Sep, returning Sat, 24 Oct.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Barcelona on Fri, 18 Sep, arriving in Ontario International.Inbound indirect flight with Iberia, departs from Ontario International on Sat, 24 Oct, arriving in Barcelona.Price includes taxes and charges.From $1,276, select.
Ontario.$1,280 per passenger.Departing Mon, 5 Apr, returning Tue, 20 Apr.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Barcelona on Mon, 5 Apr, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Tue, 20 Apr, arriving in Barcelona.Price includes taxes and charges.From $1,280, select.
Ontario.$1,280 per passenger.Departing Mon, 26 Apr, returning Mon, 10 May.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Barcelona on Mon, 26 Apr, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Mon, 10 May, arriving in Barcelona.Price includes taxes and charges.From $1,280, select.
Ontario.$1,280 per passenger.Departing Thu, 18 Mar, returning Tue, 6 Apr.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Barcelona on Thu, 18 Mar, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Tue, 6 Apr, arriving in Barcelona.Price includes taxes and charges.From $1,280, select.
Ontario.$1,304 per passenger.Departing Mon, 3 May, returning Sun, 9 May.Return flight with British Airways.Outbound indirect flight with British Airways, departs from Barcelona on Mon, 3 May, arriving in Ontario International.Inbound indirect flight with British Airways, departs from Ontario International on Sun, 9 May, arriving in Barcelona.Price includes taxes and charges.From $1,304, select.
Ontario.$1,489 per passenger.Departing Thu, 3 Dec, returning Thu, 10 Dec.Return flight with Air France and KLM.Outbound indirect flight with Air France, departs from Barcelona on Thu, 3 Dec, arriving in Ontario International.Inbound indirect flight with KLM, departs from Ontario International on Thu, 10 Dec, arriving in Barcelona.Price includes taxes and charges.From $1,489, select.
Ontario.$1,534 per passenger.Departing Fri, 11 Sep, returning Sat, 27 Mar.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Barcelona on Fri, 11 Sep, arriving in Ontario International.Inbound indirect flight with Iberia, departs from Ontario International on Sat, 27 Mar, arriving in Barcelona.Price includes taxes and charges.From $1,534, select.
Ontario.$1,583 per passenger.Departing Fri, 21 May, returning Fri, 11 Jun.Return flight with Iberia.Outbound indirect flight with Iberia, departs from Barcelona on Fri, 21 May, arriving in Ontario International.Inbound indirect flight with Iberia, departs from Ontario International on Fri, 11 Jun, arriving in Barcelona.Price includes taxes and charges.From $1,583, select.

Find the cheapest month to fly from Barcelona to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Barcelona to Ontario International flights are currently cheapest in September.
Aug
from $1,255
Sep
from $1,229
Oct
from $1,231
Nov
from $1,264
Dec
from $1,489
Jan
Find prices
Feb
from $1,238
Mar
from $1,239
Apr
from $1,280
May
from $1,304
Jun
from $1,952
Jul
Find prices

Barcelona to Ontario International: Alternative routes

Compare routes from Barcelona 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 $1,228
Search flights

San Bernardino Norton AFB

39km from central Ontario
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Santa Ana John Wayne

48km from central Ontario
from $1,182
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Long Beach Municipal

54km from central Ontario
from $1,272
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Hawthorne

65km from central Ontario
Search flights

Burbank

67km from central Ontario
from $1,196
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Los Angeles International

71km from central Ontario
Cheapest
from $739
Search flights

Barcelona to Ontario: Flight information

The things to know before you go.
Cheapest flight found$1,228
Cheapest month to flySeptember

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

The best price we found for a return flight from Barcelona to Ontario International is $1,229. 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 Barcelona to Ontario International. But we found flights with one or more stops from $1,229.
As of August 2026, there are no flights flying from Barcelona to Ontario International.
The cheapest month to fly from Barcelona to Ontario International is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Barcelona Airport to Ontario International Airport on Wednesday, 16 September 2026.
No airlines currently offer direct flights between Barcelona 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, Iberia offers the cheapest flight tickets to Ontario International.

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

  • Ontario's timezone is UTC-8, which makes Ontario nine hours behind Barcelona.

  • Get to the airport on time so you don't miss your BCN to ONT flight. Be there at least two hours ahead for international flights and an hour early for domestic departures to avoid a last-minute sprint to the gate.

  • You can expect 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.

  • If you want to include a stop along the way, just uncheck 'Direct flights only' when searching for your ticket from Barcelona Airport to Ontario International Airport. Here are the top stopovers between BCN and ONT:

    • Atlanta Hartsfield-Jackson Airport

    • Dallas Fort Worth International Airport

    • San Francisco International Airport

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

  • The lowest price we've found for a one-way Barcelona Airport to Ontario International Airport flight is $582. A return fare right now is $1,229. Depending on the availability when you book, these fares could change.

  • To score cheap tickets from BCN to ONT, book ahead. Airlines usually offer lower prices when flights are first made available.

  • The 'Whole month' search tool shows you the cheapest flights from Barcelona Airport to Ontario International Airport across each month. It's a great way to snap up a bargain if your dates are flexible.

  • Finding cheap flights from BCN to ONT is a breeze with Price Alerts. All you need to do is create one of these automatic alerts and we'll notify you when fares go down.

  • Pick your ideal departure and arrival times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to get the best deals on flights from Barcelona Airport to Ontario International Airport.

Handy information about Barcelona Airport (BCN)

  • 80% of flights leaving Barcelona Airport touch down at their destination according to schedule. Given its dependable on-time performance, delays are unlikely when jetting out of BCN.

  • Central Barcelona to Barcelona Airport is around 13 kilometres. Depending on traffic, it'll take about 25 minutes to get there if you're catching a taxi, ride-sharing or driving.

  • The trip when using public transport usually takes 30 minutes.

  • Searching for a convenient hotel near BCN? If you're boarding an early flight from Barcelona Airport to Ontario International Airport, these accommodation options will have you moments from your departure lounge:

Arriving at Ontario International Airport (ONT)

When to fly to Ontario International Airport (ONT)

  • It's time to pick your travel dates for your flight from Barcelona Airport to Ontario International Airport. July is the most popular month to visit Ontario. If you'd like a more relaxed vibe, go in March.

  • When booking your flight from Barcelona Airport to Ontario International Airport, think about the type of weather you enjoy. August is the warmest month in Ontario, with the temperature ranging from 16ºC (61ºF) to 36ºC (97ºF).

  • February has average temperatures of between 4ºC (39ºF) and 24ºC (75ºF). Search for cheap tickets from BCN to ONT sometime then if you want to travel when it's cooler.

Explore more of the United States

  • Los Angeles is just one of the many cities in the United States waiting to be discovered after you've experienced Ontario. Around 56 kilometres away to the west, popular attractions include Hollywood Sign, Universal Studios Hollywood and Hollywood Bowl.

  • If there's time to check out another major stop in the United States, head for San Diego, roughly 153 kilometres south of Ontario. San Diego Zoo, San Diego Balboa Park and USS Midway Museum are key reasons to visit.

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Plan the rest of your trip from Barcelona to Ontario

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